GRIDLEY CITY COUNCIL AGENDA: Regular Meeting of 6-15-26 Page 1 of 4 “Our purpose isto continuously enhance our community’s vitality and overall quality of life. We are committed to providing high quality, cost-effective municipal services and forming productive partnerships with our residents and regional organizations. We collectively develop, share, and are guided by a clear vision, values, and meaningful objectives.” The Public is encouraged to attend and participate in person. Comments from the public on agenda items will be accepted until 4 pm on June 15th, 2026, via email to [email protected] or via the payment/document drop box at Gridley City Hall and will be conveyed to the Council for consideration.
You may view using the following link, ID, and passcode:
https://us06web.zoom.us/j/89408713700?pwd=diUWzp4yAkL5VKfSZSrC4q0ROkNdEa.1 Passcode:168089
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CALL TO ORDER - Mayor Farr
ROLL CALL
PLEDGE OF ALLEGIANCE – Vice Mayor Johnson
PROCLAMATION – None
INTRODUCTION OF NEW OR PROMOTED EMPLOYEES - None
COMMUNITY PARTICIPATION FORUM - Members of the public may address the City Council on matters not listed on the agenda. The City Council may not discuss nor take action on any community participation item brought forward by a member of the community. Comments are requested to be limited to three (3) minutes.
CONSENT AGENDA
1. Council Meeting Minutes
City Council to review and approve City Council minutes Recommended Action(s):
a. Approve regular City Council meeting minutes dated June 1st, 2026 b. Approve special City Council meeting minutes dated May 14th, 2026
2. Operational Bylaws and Procedural Rules for the City of Gridley Planning Commission Gridley City Council – Regular Meeting Agenda
Monday, June 15th, 2026; 6:00 pm
Gridley City Hall, 685 Kentucky Street, Gridley, CA 95948 GRIDLEY CITY COUNCIL AGENDA: Regular Meeting of 6-15-26 Page 2 of 4 City Council to review and approve Resolution 2026-R-018: a Resoltion of the City of Gridley establishing operational bylaws and procedural rules for the City of Gridley Planning Commission
Recommended Action(s):
a. Approve Resolution 2026-R-018
3. Sister City Comala, Colima Invitation to Visit for Butte County Fair City Council to consider sending an invitation letter to Sister City Comala, Colima to attend the Butte County Fair.
Recommended Action(s):
a. Approve invitation
INFORMATIONAL ITEM
4. Strategic Planning Session – Administration
City Council to receive a presentation highlight the strategic planning initiatives for the Administration Department to include:
o Finance
o Planning
o Recreation
o Administration
Recommended Action(s):
a. Receive presentation and provide direction to City staff as needed
5. Firework Ordinance Amendment
Provide direction to staff regarding potential amendments to the City’s fireworks regulations, including any desired changes to the current municipal code and the manner in which Council would like those changes implemented.
Recommended Action(s):
a. City Council to consider potential amendments to the City’s current Fireworks Ordinance.
ITEMS FOR CONSIDERATION
6. Potential Land Exchange Between the City and Gridley Unified School District City Council to discuss a potential land exchange with Gridley Unified School District.
GRIDLEY CITY COUNCIL AGENDA: Regular Meeting of 6-15-26 Page 3 of 4 Recommended Action(s):
a. Provide staff direction regarding whether to pursue appraisals, utility planning analysis, park expansion feasibility, and additional due diligence before entering into negotiations
7. Chamber of Commerce Donation Request
City Council to consider the donation request for the Chamber of Commerce.
Recommended Action(s):
a. Provide staff direction on donation request
8. Gridley Sports Complex Ph 1 - Change Order #7
City Council to consider approval of Gridley Sports Complex Phase 1 - Change Order No. 7 (PCO 07) with Franklin Construction, Inc. in the amount of $363,040.00 for the revised sports lighting foundations, associated site remediation, and delay-related costs resulting from unsuitable soil conditions encountered during construction Recommended Action(s):
a. Authorize the City Administrator to execute Change Order No. 7 (PCO 07) with Franklin Construction, Inc. in the amount of $363,040.00
9. FY 2026/2027 City Operational Budget
City Council to consider adoption Resolution No. 2026-R-018: a resolution of the City Council adopting the budget for FY 26/27 and Resolution No. 2026-R-019: a resolution of the City Council establishing the appropriations limit for FY 26/27 Recommended Action(s):
a. Approve Resolution No. 2026-R-019
b. Approve Resolution No. 2026-R-020
10. Orchard View Easement Acceptance
City Council to consider Resolution No. 2026-R-021, accepting eight (8) separate perpetual easement deeds for electrical, water, wastewater, and storm drain utility networks from Gridley Orchard Associates, LP
Recommended Action(s):
a. Approve Resolution No. 2026-R-021
GRIDLEY CITY COUNCIL AGENDA: Regular Meeting of 6-15-26 Page 4 of 4 b. Authorize City Administrator to execute the accompanying Certificates of Acceptance for formal recording
11. City of Gridley Public Works Construction Standards City Council to consider Resolution No. 2026-R-021: a resolution approving and adopting the updated City of Gridley Public Works Construction Standards for public infrastructure improvements and authorizing their use for all applicable public and private development projects within the city.
Recommended Action(s):
a. Approve Resolution No. 2026-R-022
COUNCIL COMMITTEE REPORTS – Brief reports on conferences, seminars, and meetings attended by the Mayor and City Council members, if any.
CITY ADMINISTRATOR REPORTS – Brief updates and reports on conferences, seminars, and meetings attended by the City Administrator, if any.
DEPARTMENT UPDATE REPORTS – Brief updates and reports on City services as it pertains to each department, if any.
POTENTIAL FUTURE CITY COUNCIL ITEMS – (Appearing on the Agenda within 30 days):
Noise Ordinance Amendment 7/20/2026
Public Works Standards and Details 7/20/2026
AMI Metering 7/20/2026
Electric Distribution System Study 7/20/2026
CLOSED SESSION
12. LIABILITY CLAIMS Cal. Gov. Code Section 54956.95(a): Claimant: Felipa Franco; Agency Claimed Against: City of Gridley
ADJOURNMENT – adjourning to a regular meeting on July 20th, 2026 NOTE 1: POSTING OF AGENDA- This agenda was posted on the public bulletin board at City Hall at or before 6:00 p.m., June 12th, 2026. This agenda along with all attachments is available for public viewing online at www.gridley.ca.us and at the Administration Counter in City Hall, 685 Kentucky Street, Gridley, CA.
NOTE 2: REGARDING UNSCHEDULED MATTERS – In accordance with state law, it shall be the policy of this Council that no action shall be taken on any item presented during the public forum or on unscheduled matters unless the Council, by majority vote, determines that an emergency situation exists, or, unless the Council by a two-thirds vote finds that the need to take action arose subsequent to the posting of this agenda.
GRIDLEY CITY COUNCIL AGENDA: Special Meeting of 5-14-2026 Page 1 of 1 “Our purpose isto continuously enhance our community’s vitality and overall quality of life. We are committed to providing high quality, cost-effective municipal services and forming productive partnerships with our residents and regional organizations. We collectively develop, share, and are guided by a clear vision, values, andmeaningful objectives.”
CALL TO ORDER
Mayor Farr called the meeting to order at 6:00 pm.
ROLL CALL
Present: Roberts, Calderon, Farr, Johnson
Absent: Sanchez
Arriving after roll call: None
Staff Present: Elisa Arteaga, City Administrator
Todd Farr, Police Chief
Landon Little, Deputy City Attorney
Martin Pineda, Finance Director
Jerry Cox, Public Works Director
Carmen Santana, Deputy City Clerk
COMMUNITY PARTICIPATION FORUM
The community forum was opened, but seeing as no one was present to speak, was closed.
CONSENT AGENDA - None
ITEMS FOR COUNCIL CONSIDERATION
1. Strategic Planning Session – Public Works Department City Council will receive a presentation on the Public Works Department’s strategic priorities, and planned initiatives, including related capital projects Recommended Action(s):
a. Provide feedback on the Public Works Department’s strategic priorities, and planned initiatives, including capital projects
Gridley City Council – Special City Council Meeting Minutes Thursday, May 14th, 2026; 2 :00 pm
Gridley City Hall, 685 Kentucky Street, Gridley, CA 95948 GRIDLEY CITY COUNCIL AGENDA: Special Meeting of 5-14-2026 Page 1 of 1 City Administrator Elisa Arteaga provided a brief overview of the purpose of the Strategic Planning Session, explaining that it was intended to give staff and Council an opportunity to discuss long-term organizational goals, community needs, and financial sustainability prior to the upcoming budget workshops. She noted that it is considered a best practice for cities to conduct strategic planning discussions separately from budget study sessions.
Public Works Director Jerry Cox and City Engineer Dave Harden then presented a PowerPoint presentation outlining the operations of the Public Works Department and the engineering support services provided to the City. Their presentation included an overview of daily operations, current and upcoming projects, future initiatives, and funding strategies being established to support those efforts.
2. Strategic Planning Session – Police Department
City Council will receive a presentation on the Police Department’s strategic priorities, and planned initiatives, including related capital projects Recommended Action(s):
a. Provide feedback on the Police Department’s strategic priorities, and planned initiatives, including capital projects
Police Chief Todd Farr presented a PowerPoint presentation providing an overview of the Police Department, including its organizational structure, daily operations, and public safety services provided to the community. He reviewed current staffing levels, highlighting positions that are currently filled as well as vacancies within the department, and discussed ongoing recruitment efforts to address staffing needs. Chief Farr also provided information on departmental priorities, current initiatives, and future needs to support the continued delivery of public safety services throughout the City.
CLOSED SESSION – None
ADJOURNMENT
With no further items left to discuss, Mayor Farr adjourned to the regular meeting on May 18th, 2026.
Approve: ____________________________
Elisa Arteaga, City Administrator
GRIDLEY CITY COUNCIL AGENDA: Regular Meeting of 6-1-26 Page 1 of 7 “Our purpose isto continuously enhance our community’s vitality and overall quality of life. We are committed to providing high quality, cost-effective municipal services and forming productive partnerships with our residents and regional organizations. We collectively develop, share, and are guided by a clear vision, values, and meaningful objectives.”
CALL TO ORDER
Mayor Farr called the meeting to order at 6:00 pm.
ROLL CALL
Present: Roberts, Calderon, Sanchez, Farr, Johnson
Absent: None
Arriving after roll call: None
Staff Present: Elisa Arteaga, City Administrator
Todd Farr, Police Chief
Landon Little, Deputy City Attorney
Martin Pineda, Finance Director
Ryan Carlson, Electric Director
Jerry Cox, Public Works Director
Christopher Smith, Principal Planner
Carmen Santana, Deputy City Clerk
Jamie Luevano, Recreation Manager
PLEDGE OF ALLEGIANCE
Councilmember Roberts led the Pledge of Allegiance.
PROCLAMATION – None
INTRODUCTION OF NEW OR PROMOTED EMPLOYEES - None
COMMUNITY PARTICIPATION FORUM –
Doug Hipchen, representing Waste Management, introduced himself to the Council and reported on the company's participation in the Red Suspenders Day Parade.
Joantha Guthrie introduced herself as the Public Sector Manager for Waste Management.
Olivia Henderson, Recycling Educator for Waste Management, introduced herself to the Council and provided an update on the company's educational and outreach booth at the Red Suspenders Day Parade.
Gridley City Council – Regular Meeting Minutes
Monday, June 1st, 2026; 6:00 pm
Gridley City Hall, 685 Kentucky Street, Gridley, CA 95948 GRIDLEY CITY COUNCIL AGENDA: Regular Meeting of 6-1-26 Page 2 of 7
CONSENT AGENDA
1. Council Meeting Minutes
City Council to review and approve City Council minutes Recommended Action(s):
a. Approve regular City Council meeting minutes dated May 18th, 2026
2. Consolidation of General Election with Butte County
City Council to consider approval of Resolution 2026-R-017: requesting the Board of Supervisors of the County of Butte to consolidate a General Municipal Election to be held Tuesday, November 3, 2026, with the Statewide General Elections to be held pursuant §10403 of the Elections Code.
Recommended Action(s):
a. Approve Resolution 2026-R-017
ROLL CALL
Motion: Johnson
Second: Roberts
Action: approve consent agenda as presented
Ayes: Calderon, Sanchez, Farr, Roberts, Johnson
Noes: None
Absent: None
Abstain: None
Motion passed, 5-0
INFORMATIONAL ITEM
3. Strategic Planning Session – Electric Department
City Council will receive a presentation on the Electric Department’s strategic priorities, and planned initiatives, including related capital projects Recommended Action(s):
a. Provide feedback on the Electric Department’s strategic priorities, and planned initiatives, including capital projects
Electric Director Ryan Carlson presented a PowerPoint presentation providing an overview of the Electric Department, including its daily operations, ongoing projects, future initiatives, and funding being set aside to support those efforts.
Councilmember Sanchez asked whether the City had explored any power generation projects.
GRIDLEY CITY COUNCIL AGENDA: Regular Meeting of 6-1-26 Page 3 of 7 Carlson discussed generation projects currently being pursued by the City’s partner, Northern California Power Agency.
Vice Mayor Johnson recommended that, as the City moves forward with the Advanced Metering Infrastructure (AMI) project, staff ensure that any software selected allows the City to retain ownership and access to its data.
Councilmember Calderon expressed concerns about the AMI metering project and the potential for increased electric rates for Gridley residents.
Following Council discussion, the information was received. No action was taken.
4. Firework Ordinance Amendment
City Council to consider potential amendments to the City’s current Fireworks Ordinance.
Recommended Action(s):
a. Provide direction to staff regarding potential amendments to the City’s fireworks regulations, including any desired changes to the current municipal code and the manner in which Council would like those changes implemented.
City Administrator Elisa Arteaga opened discussion regarding a potential amendment to the City's fireworks ordinance. She explained that this discussion stems from ongoing conversations over the years about providing additional enforcement tools when illegal fireworks are discharged or when safe and sane fireworks are used outside of the approved time period.
Deputy City Attorney Landon Little explained that the attached draft ordinance was provided as a reference only and outlined several provisions that could be included if the Council chooses to move forward. Potential amendments could include establishing specific fines for fireworks-related violations and possibly classifying certain violations as misdemeanors. He also noted that many cities adopt specific dates and times during which safe and sane fireworks may be used within city limits.
Vice Mayor Johnson stated that he would like to ensure any ordinance amendment contains sufficient enforcement measures to support the Police Department when violations occur.
Police Chief Todd Farr stated that, while an ordinance amendment may not eliminate all fireworksrelated issues, it would be a positive step toward reducing the use of illegal fireworks within the City of Gridley.
Deputy City Attorney Landon Little stated that he had received sufficient direction from the Council and would return with a draft ordinance for future consideration.
ITEMS FOR CONSIDERATION
5. LGBTQ+ Proclamation (Councilmember Sanchez)
City Council to consider support support the proposed LGBTQ+ Proclamation GRIDLEY CITY COUNCIL AGENDA: Regular Meeting of 6-1-26 Page 4 of 7 Recommended Action(s):
a. Provide direction on the proposed LGBTQ+ Proclamation Councilmember Sanchez presented the proposed proclamation and requested Council support for the City's LGBTQ+ community. She stated that the proclamation was intended to recognize the community's diversity and help ensure its members feel welcomed by the City.
Vice Mayor Johnson expressed concerns regarding specific language contained within the proclamation and stated that he would not vote in support.
Councilmember Calderon expressed support for the proclamation but noted that meaningful recognition should be accompanied by community outreach and engagement efforts.
Mayor Farr stated that while he understood Sanchez's intent, he felt that portions of the proclamation portrayed the City of Gridley negatively. He also expressed the opinion that Council actions should remain focused on City business.
ROLL CALL
Motion: Sanchez
Second: Calderon
Action: approve the LGBTQ+ Pride Month Proclamation for June 2026 Ayes: Calderon, Sanchez
Noes: Farr, Roberts, Johnson
Absent: None
Abstain: None
Motion failed, 2-3
6. Senior Appreciation Day (Councilmember Calderon)
City Council consideration of city support for Senior Citizen Appreciation Day Event Recommended Action(s):
a. Approve City support for the Senior Citizen Appreciation Day event scheduled for June 17, 2026, at Daddow Park, including the contribution of City staff time and departmental participation as needed to support the event.
Councilmember Calderon presented plans for a Senior Appreciation Day event that he has been organizing in collaboration with several local agencies. He stated that participating organizations plan to provide food, informational booths, and other resources for seniors. Councilmember Calderon explained that the purpose of the event is to recognize senior citizens and their contributions to the community. He requested that the City serve as a sponsoring agency and provide staff support to assist with certain aspects of the event.
Councilmember Sanchez expressed support for the event, stating that it is intended to recognize and support a segment of the community that may face unique challenges and adversity.
GRIDLEY CITY COUNCIL AGENDA: Regular Meeting of 6-1-26 Page 5 of 7
ROLL CALL
Motion: Calderon
Second: Sanchez
Action: Approve City support for the Senior Citizen Appreciation Day event scheduled for June 17, 2026, at Daddow Park, including the contribution of City staff time and departmental participation as needed to support the event.
Ayes: Calderon, Sanchez, Farr, Roberts, Johnson
Noes: None
Absent: None
Abstain: None
Motion passed, 5-0
7. Agreement with Chico State Enterprises for GIS Maintenance Services (FY 26/27) City Council consideration of an agreement with Chico State Enterprises, through the North State Planning and Development Collective Geographical Information Center (GIC), to provide Geographic Information System (GIS) maintenance and support services for Fiscal Year 2026–2027.
Recommended Action(s):
a. Approve agreement with Chico State Enterprises
b. Authorize City Administrator to execute necessary documents Principal Planner Christopher Smith requested Council approval of an agreement with Chico State Enterprises, through the North State Planning and Development Collective Geographic Information Center (GIC), to provide Geographic Information System (GIS) maintenance and support services for Fiscal Year 2026–2027.
Smith highlighted the many benefits of implementing a GIS program and explained that the City's current system is not always reliable. He stated that a GIS platform would serve as a valuable resource for City staff by providing mapping and documentation capabilities for assets such as City infrastructure. He also noted that the system would benefit the public by offering access to information through an online platform, including items such as zoning maps and other planningrelated data.
Vice Mayor Johnson stated that, similar to concerns he expressed regarding the AMI project earlier in the meeting, he wanted to ensure that the City would retain ownership and access to all data collected through the GIS program and that the information would remain available to the City should the service or program ever be discontinued.
ROLL CALL
Motion: Johnson
Second: Roberts
GRIDLEY CITY COUNCIL AGENDA: Regular Meeting of 6-1-26 Page 6 of 7 Action: Approve agreement with Chico State Enterprises and authorize City Administrator to execute necessary documents
Ayes: Calderon, Sanchez, Farr, Roberts, Johnson
Noes: None
Absent: None
Abstain: None
Motion passed, 5-0
COUNCIL COMMITTEE REPORTS
Vice Mayor Johnson reported on his attendance at the BCAG and Butte Quality Air Control Management meetings.
CITY ADMINISTRATOR REPORTS
City Administrator Elisa Arteaga reported on her attendance at a recent BCAG meeting and she also reported on a recent meeting with the City's Sister City, Comala, and provided an update on ongoing collaborative projects and initiatives between the two communities.
DEPARTMENT UPDATE REPORTS
Public Works Director Jerry Cox reported on his attendance at a recent BCAG meeting. He also reported that Caltrans has resumed nighttime work on the highway project and stated that the work is anticipated to be completed by mid-August.
Battalion Chief Mike Conaty reported on recent activities of the Gridley Fire Department.
Principal Planner Christopher Smith informed the Council that the Steffen Estates map has now been recorded. He also provided an update on his ongoing work related to the Safety Element.
POTENTIAL FUTURE CITY COUNCIL ITEMS – (Appearing on the Agenda within 30 days):
Noise Ordinance Amendment 6/15/2026
Public Works Standards and Details 6/15/2026
Planning Department Strategic Planning Session 6/15/2026 Administration Department Strategic Planning Session 6/15/2026 Sports Complex Change Order 6/15/2026
Recreation Department Strategic Planning Session 6/15/2026 AMI Metering 7/20/2026
Electric Distribution System Study 7/20/2026
CLOSED SESSION – None
ADJOURNMENT
GRIDLEY CITY COUNCIL AGENDA: Regular Meeting of 6-1-26 Page 7 of 7 With no further items left to discuss, Mayor Farr adjourned to the regular meeting on June 15, 2026.
Approve: _______________________________
Elisa Arteaga, City Clerk
City Council Agenda Item #2
Staff Report
Date: June 15, 2026
To: Mayor and City Council
From: Christopher Smith, Principal Planner
Subject: Operational Bylaws and Procedural Rules for the City of Gridley Planning Commission
Recommendation
City staff recommends that the City Council adopt Resolution No. 2026-R-018, approving and establishing comprehensive operational bylaws and procedural rules for the City of Gridley Planning Commission.
Background
The Gridley Planning Commission is established as a five-member appointed body responsible for advising the City Council on land use, zoning, and development matters. Over the past approximately six months, the Planning Commission experienced multiple vacancies, leaving it without a sufficient number of members to establish a three-member quorum necessary to conduct official municipal business.
Recently, the City Council appointed three (3) new planning commissioners, successfully restoring the body to its full five-member capacity. To prepare the newly appointed commissioners for their roles, the Planning Department initiated an onboarding and training program. During this process, staff discovered that the City lacked an updated, comprehensive, and consolidated set of operational bylaws or formalized rules of procedure to guide the Commission's operations.
To address this administrative gap, staff conducted regional research into fundamental parliamentary and procedural bylaws utilized by neighboring local jurisdictions. Staff compiled these standard practices into a unified procedural framework tailored specifically to the City of Gridley’s municipal structure.
DISCUSSION & ANALYSIS
The proposed Planning Commission Bylaws establish clear administrative protocols to ensure fair, transparent, and legally defensible public meetings. Adopting these rules provides a structured operational foundation for both new and experienced commissioners, ensuring alignment with California public meeting laws and the Gridley Municipal Code.
Key components of the proposed bylaws include:
X Regular
Special
Closed
Emergency
• Quorum and Voting Dynamics: Re-establishes that three members constitute a quorum and clarifies voting rules, including voice or roll call votes, the handling of tie votes, and provisions for vote changes prior to official announcements. • Public Accountability & "5-Day" Rule: Mandates that all staff reports, proposed ordinances, and resolutions be made available to the Commission and the public no later than the fifth calendar day preceding a regular meeting. This ensures ample review time and transparent governance.
• Conflict of Interest Protocol: Strictly defines the procedure for disqualification due to a conflict of interest, requiring the affected commissioner to state the conflict and physically leave the dais or voting area prior to item consideration. • Rules of Debate and Decorum: Establishes Robert’s Rules of Order, Newly Revised as the governing parliamentary framework. It outlines strict guidelines for public communication (limiting comments to five minutes) and empowers the Chair to maintain order and bar disruptive behavior.
• Public Hearing Management: Details formalized procedures for opening public hearings, receiving oral/written evidence, managing continuances, and closing testimony.
• Administrative Protection Clause: Includes a procedural safeguard stating that a technical failure to perfectly observe these internal rules does not invalidate or affect the legality of actions taken by the Commission.
Financial Impact
There is no direct fiscal impact associated with the adoption of these bylaws. Staff reports and agenda materials will continue to be prepared within the normal operating budget of the Community Development Department.
Attachments
1. Resolution No. 2026-R-018
RESOLUTION OF THE CITY COUNCIL OF THE CITY OF GRIDLEY ADOPTING OPERATIONAL
BYLAWS AND PROCEDURAL RULES FOR THE CITY OF GRIDLEY PLANNING COMMISSION WHEREAS, the Gridley Planning Commission consists of five (5) appointed positions, and due to recent vacancies, the Commission has been unable to establish a three-member quorum to transact municipal business for a period of approximately six (6) months; and WHEREAS, the City Council has recently appointed three (3) new planning commissioners, successfully restoring the Planning Commission to its full five-member capacity; and WHEREAS, upon initiating an onboarding and training program for the newly appointed commissioners, staff identified that the City lacked an updated, comprehensive, and consolidated set of operational bylaws and procedural rules for the Planning Commission; and WHEREAS, the staff conducted extensive regional research into standard, fundamental parliamentary and procedural bylaws from neighboring local jurisdictions to compile a standardized framework tailored for the City of Gridley; and WHEREAS, the establishment of clear operational bylaws ensures full compliance with California state public meeting laws, the Gridley Municipal Code, and standard parliamentary frameworks like Robert’s Rules of Order, Newly Revised; and
WHEREAS, these rules clearly define requisite procedures for establishing a quorum, electing leadership officers annually each July, managing public hearings, handling conflicts of interest, and maintaining public decorum to protect the integrity of the city's land use decisions; and WHEREAS, codified procedures for agenda preparation, timelines for public review, and the management of public testimony promote transparency, efficiency, and robust civic participation in municipal planning; and
WHEREAS, the City Council finds that adopting these structured procedural rules is in the best interest of the city, providing the Planning Commission with the essential administrative tools necessary to conduct fair, orderly, and legally defensible public meetings.
Resolution No. 2026-R-018
NOW, THEREFORE, LET IT BE RESOLVED, by the City Council of the City of Gridley that the Planning Commission Bylaws and Rules of Procedure are hereby adopted in their entirety to read as follows:
A. QUORUM. Three (3) members of the Planning Commission shall constitute a quorum for the transaction of business. Motions may be passed by a majority of members present and voting. When no quorum exists, any member of the Planning Commission may adjourn the meeting to the next regularly scheduled meeting or to a date specified by the majority of those present. The Secretary of the Planning Commission may adjourn as specified above if no Commissioner is present.
B. PUBLIC MEETINGS. All meetings shall be held in full compliance with the provision of state law, applicable provisions of the Gridley Municipal Code, and these procedural rules. All regular and special meetings as well as study sessions of the Commission shall be open to the public. Whenever a regular scheduled Commission meeting falls on a public holiday honored by the City of Gridley, no regular meeting shall be held on that day. Such regular meetings may be rescheduled to another business day or canceled by motion adopted by the Planning Commission or administratively by the Planning Director.
C. AGENDA. All reports, proposed ordinances, resolutions, or other matters to be submitted to the Planning Commission by city staff shall be made available for review by the Commission and the public not later than during the fifth calendar day preceding the next regular scheduled Commission meeting. The Secretary of the Planning Commission shall have prepared an agenda of all such matters according to the order of business and provide a copy to each Planning Commissioner and make it available to the public at the cost of reproduction.
D. ORDER OF BUSINESS. All regular meetings of the Commission shall consider and dispose of matters in substantially the following order, except as otherwise may be ordered by the Chair of the Commission or majority al the Commission:
1. Call to Order 2. Pledge of Allegiance
3. Roll Call 4. Approval of Minutes
5. Communication 6. Citizen Forum
7. Continued Public Hearings 8. Public Hearings
9. Other Business 10. Committee Activities
11. Commission Members 12. Adjournment
The provisions of this section shall be directory and not mandatory.
E. OFFICERS.
1. Selection.
a. A Chair and Vice-Chair shall be elected annually from among the Commission's membership at the first meeting in July to serve at the pleasure of the Commission.
b. The Vice-Chair shall succeed the Chair if he/she vacates the office before the term Is completed, the Vice-Chair to serve the unexpired term of the vacated office. A new Vice-Chair shall be elected at the next regular meeting.
c. In the absence of. the Chair and Vice-Chair, any other member shall call the Commission to order, whereupon a chair shall be elected from the members present to preside.
2. Responsibilities. The responsibilities and powers of the officers of the Planning Commission shall be as follows:
a. Chair
1. Preside at all meetings of the Commission.
2. Call special meetings of the Commission in accordance with legal requirements and the Rules of Procedure.
3. Sign documents of the Commission.
4. See that all actions of the Commission are properly taken.
5. Assist staff in determining agenda items.
b. Vice-Chair
1. During the absence, disability or disqualification of the Chair, the Vice-Chair shall exercise or perform all the duties and be subject to all the responsibilities of the Chair.
F. ADJOURNED/SPECIAL MEETINGS. In the event it is the wish of the Planning Commission to adjourn its meeting to a certain hour on another day, a specific date, time and place must be set by the Commission prior to the regular motion to adjourn. Special meetings of the Planning Commission may be held at any time upon the call of the Chair or by a majority of the voting members of the Commission or upon request of the City Council following at least twenty-four (24) hours notice to each Commission member and to the press. The time and place of the special meeting shall be determined by the convening authority. The Commission may be convened as a whole or as a committee of the whole in the same manner as prescribed for the calling of a special meeting for the purpose of holding a study session provided that no official action may be taken, and no quorum shall be required. Such meetings shall be open to the public.
G. ROLL CALL. Before proceeding with the business of the Commission, the Commission Secretary shall call the roll of the members and the names of those present shall be entered into the minutes. The time of arrival of a Commission member who was absent at roll call shall be entered into the minutes.
H. GAINING THE FLOOR. Every Commission member desiring to speak shall first address and gain recognition by the Chair. Such member shall confine his/her remarks to the question under consideration. After gaining recognition, a member may ask questions of staff who may answer or may defer to another member of staff or other person. A Commission member, once recognized, shall not be interrupted while speaking, unless called to order by the Chair, or unless a point of order or personal privilege is raised by another Commission member, or unless the speaker chooses to yield to a question by another Commissioner. If a Commissioner is called to order he/she shall cease speaking until the question of order is determined, and if determined to be in order, he/she may proceed.
I. PROPRIETY OF CONDUCT. Members of the Commission and the public must observe order and shall not by conversation or in any way make or disturb any other member of the Commission, or refuse to obey the orders of the Commission or the Chair, except as this resolution may provide.
J. PUBLIC COMMUNICATION. No person shall be ·entitled to speak to the Commission at a public meeting who has not been recognized by the Chair. Unless allowed by the Chair, no person shall speak for more than five (5) minutes on one item of business.
The purpose of public communication is to provide information to the Commission which it may not have. The right to speak before the Commission shall be limited to the public communication portion of public hearings and to any time the Chair will allow such communication.
The Chair may bar from further speaking at that meeting anyone who:
1. Makes any personal, impertinent, or defamatory remarks;
2. Becomes boisterous or disruptive;
3. Speaks without being recognized by the Chair;
4. Violates any rules of order established by this resolution or by the Commission.
The ruling of the Chair to bar any member of the public from speaking further at that meeting shall be final and conclusive, subject only to the right of appeal by any Commissioner to the entire Commission.
Any person who engages in disorderly conduct, such as hand clapping, stamping of feet, whistling, using profane language, yelling, or similar demonstration which disturbs the peace and good order of the meeting, shall, at the request of the Chair, or a majority of the Commission, be removed from the Commission Chambers.
K. ADDRESSING THE COMMISSION. Interested parties or their representatives may write to _the Planning Commission regarding any matter that is under the jurisdiction of the Commission.
In order to expedite public hearings, whenever a group wishes to address the Commission on the same issue, the Chair may ask the group to have one spokesperson speak. Other members of the group may speak if facts or comment were not presented by the spokesperson.
No person shall address the Commission unless first recognized by the Chair. Each person desiring to address the Commission shall approach the podium, state his//her name and address for the record, state the subject which he/she wishes to discuss, and state whom he/she is representing if other than himself/herself.
Comments from the floor shall be limited to five (5) minutes unless more.
Time is granted by the Chair. Comments shall be limited to the subject matter before the Commission.
Should the issue discussed from the floor require more than five minutes, the Chair, or a majority of the Commission may place the issue on a future Commission agenda.
All comments from the floor shall be addressed to the Commission as a whole and not to any member only. No questions shall be asked of any Commission member or member of the city staff without first obtaining permission from the Chair. Anyone violating this section shall be called to order by the Chair.
L. ENFORCEMENT OF ORDER/POINTS OF ORDER. Any Commissioner may move to require the Chair to enforce the procedural rules and an affirmative vote of the Commission majority shall require the Chair to do so. The Chair shall determine all points of order subject to the right of any Commission member who requests full Commission ruling on the question; and the question shall be: "Shall the decision of the Chair be sustained?" The majority vote shall conclusively determine such questions of order.
M. POINTS OF COMMISSION PRIVILEGE. The right of a Commission member to address the Commission on a question of personal privilege shall be limited to cases in which his/her integrity, character, or motives are questioned, or when the welfare of the Commission is concerned. A Commission member raising the point of personal privilege may interrupt another Commission member who has the floor only if the Chair allows such interruption.
A Commission member moving the adoption of a resolution or motion shall have the privilege of closing debate, subject to a majority of the Commission voting that the debate should be continued. If a matter contains two or more propositions, an Commission member may ask to address and rule on the propositions separately. A majority vote of the Commission is necessary to so separate propositions.
N. VOTING. The passage of every motion shall be by voice vote or roll call vote and entered in the record. Any member of the Commission may demand a roll call vote on any matter before the Commission prior to a vote on the motion. Any Commission member may explain his/her vote during a roll call vote.
Commissioners shall vote in the affirmative by saying "aye" or "yes," and in the negative by saying "nay" or "no." Commission members shall state their vote when asked by the Chair or by the Commission Secretary during roll call vote. All votes on the Commission shall be recorded in the minutes of the meeting in which the voting took place.
Every member shall vote on the question before the Commission, unless he/she abstains for cause. An abstention vote shall be considered "not a vote."
1. Change of Vote. After voting is completed, but before the result of the vote is announced, any member of the Commission may change his/her vote. No Commission member may change his/her vote after the vote has been announced by the Chair unless a majority of the Commission grants consent.
2. Tie Vote. A tie vote shall be considered as defeating the motion.
3. Failure of an Item to pass. A majority vote of the Commission against a motion or tie vote shall defeat the motion.
4. Abstention/Disqualification.
a. Any Commission member may abstain himself/herself from voting for any stated or unstated reason.
b. Any Commission member which is directly affected financially or personally by a decision of the Planning Commission should abstain from voting on the motion but may participate as a Commission member in the discussion of the matter.
c. When a Commissioner disqualifies himself/herself from voting, the Commissioner shall state prior to the consideration of such matter by the Commission that the disqualification is due to a possible conflict of interest and the Commissioner shall leave the dais or voting area.
5. Abstract of Commissioner's Remarks. A Commission member may request the Chair to place an abstract of his/her comments on any subject under consideration by the Commission entered into the minutes. The Chair must grant his/her consent in order for the abstract to be placed in the minutes.
6. Right to Record Reasons for Dissent. Any Commissioner shall have the right to enter into the minutes his/her reasons for dissent or protest of an action taken by the Commission.
7. Reconsideration. A Commission member who voted in the majority on a motion may, at the same meeting the motion was passed, move to reconsider the action taken, unless a procedural step was violated, in which case, the Planning staff shall return the matter to the Commission at the next available meeting.
O. PROCEDURAL RULES - VIOLATION OR MODIFICATION SHALL NOT INVALIDATE. Insofar as is practicable, the business of the Commission shall be conducted substantially in the order and manner provided in this resolution; provided, however, that the failure of the Commission to observe or enforce procedural rules. shall in no manner effect the validity or legality of any action or proceeding taken by the Commission. The Commission, in its discretion, reserves the right to govern its own proceedings.
P. RULES OF DEBATE.
1. All Commission members may debate, state motions, second motions, and vote.
2. Except as provided within this resolution, or provided by law, Robert's Rules of Order, Newly Revised, shall govern the conduct of regular meetings of the Commission and all special meetings unless otherwise announced at the beginning of the special meeting.
3. Procedures at a regular or special meeting may vary from Robert's Rules of Order unless a Commission member objects during the time the matter is before the Commission.
4. The Chair may allow by a majority consent of the Commission, a member of the Commission to introduce a resolution, motion, or other matter which is not in the regular agenda order. Any Commission member may introduce a matter which is in the regular agenda order.
Q. PUBLIC HEARING - OPENING. The Chair or his/her designee shall announce the beginning of a public hearing and shall request from staff any information pertinent to the public hearing. After any presentation by staff and any questioning by the Commission of staff, the Chair shall open the public hearing. If the hearing is opened to the public, any person may speak before the Commission regarding the matter under consideration for a maximum of five minutes unless granted additional time by the Chair.
R. PUBLIC HEARING - EVIDENCE RECEIVED. During the public hearing, the Commission shall receive all oral and written evidence relative to the matter being considered.
Written evidence presented shall become the property of the City of Gridley for one year after the public hearing, at which time it shall be disposed of or retained at the discretion of the Planning Director.
S. PUBLIC HEARING CONTINUANCE. The Commission may continue to a date certain any public hearing unless a state law or regulation requires immediate review of the project and the city and the applicant cannot agree to a specified date for the continuance. No further advertisement of a hearing continued to a date certain shall be required.
If circumstances require that a hearing be continued to a date uncertain, the public notice requirements of the original hearing shall be required for the new hearing when the matter is rescheduled.
T. PUBLIC HEARING - CLOSING. When the Chair determines that sufficient evidence has been presented, then no further testimony shall be presented. Should the Chair, or a majority of the Commission desire further testimony, they may request it at any time prior to the decisive vote on the project or agenda item.
U. TESTIMONY UNDER OATH. The Chair, or a majority of the Commission may require anyone presenting testimony before the Commission to be sworn as a witness and testify under oath.
V. INVESTIGATIONS AND HEARINGS. The Commission shall have the discretionary right to make investigations and conduct hearings with respect to all matters within its powers and to all matters pertaining to the administration thereof.
W. ADJOURNMENT. The Commission shall adjourn each regularly scheduled meeting by a voice vote of the majority of those present and voting. Adjournment will be to the next scheduled Commission meeting unless another date has been selected by majority vote of those present and voting-. The Commission may continue a meeting to a date certain by majority vote of those present and voting.
I HEREBY CERTIFY that the foregoing resolution was introduced and passed at a regular City Council meeting of the City of Gridley held on this 15th day of June, 2026, by the following vote:
AYES:
NOES:
ABSTAIN:
ABSENT:
ATTEST: APPROVED:
Elisa Arteaga, City Clerk Michael Farr, Mayor
City Council Agenda Item #3
Staff Report
Date: June 15, 2026
To: Mayor and City Council
From: Elisa Arteaga, City Administrator
Subject: Invitation Letter to Comala, Colima, Mexico for the Butte County Fair Recommendation
Staff recommends the City Council provide direction and support for the City to send an invitation letter to the Municipal President of Comala, Colima, Mexico, inviting representatives of the City of Comala to attend the 2026 Butte County Fair in Gridley to celebrate the Sister City relationship established in August 2023.
Background
In August 2023, the City of Gridley established a Sister City relationship with the City of Comala, Colima, Mexico, with the goal of promoting cultural exchange, community connections, and opportunities for collaboration between the two communities.
As part of continuing to strengthen this relationship, staff has prepared a formal invitation letter addressed to Honorable Daniela Orozco, Municipal President of Comala, inviting her and City representatives to attend the 2026 Butte County Fair, scheduled for August 27–30, 2026, in Gridley.
The invitation provides an opportunity to recognize and celebrate the partnership between the two cities while encouraging continued cultural exchange and engagement.
Staff is requesting City Council support to proceed with issuing the invitation letter on behalf of the City.
Fiscal Impact
There is no fiscal impact associated with sending the invitation letter. Any expenses related to travel or participation in the visit will be the responsibility of the individuals attending, and no City funds will be allocated toward these expenses.
Attachment
Draft Invitation Letter
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Honorable Daniela Orozco
Presidenta Municipal de Comala
Leona Vicario # 1
Centro Comala, Colima, México C.P. 28450
Honorable Presidenta Daniela Orozco,
I hope this letter finds you in good health and spirits. On behalf of the City of Gridley, California, I am delighted to extend a warm invitation to you, your staff, and representatives of the City of Comala to attend the upcoming Butte County Fair, which will be held in Gridley from August 27–30, 2026.
This event presents a meaningful opportunity to continue strengthening the friendship and collaboration between our communities under the Sister City relationship established in August 2023.
We would be honored to welcome your presence as we celebrate and further develop this partnership, and as we promote cultural exchange, community connection, and shared learning between our cities.
We sincerely appreciate your consideration of this invitation and would be happy to assist or provide additional information needed to support your visit.
Thank you, and we look forward to the possibility of welcoming you to Gridley.
Sincerely,
Michael W. Farr, Mayor
City of Gridley, California
Agenda Item #4
Strategic Planning Presentation – Administration
City Council to receive a presentation highlight the strategic planning initiatives for the Administration Department to include:
o Finance
o Planning
o Recreation
o Administration
Recommended Action(s):
a. Receive presentation and provide direction to City staff as needed
City Council Agenda Item #5
Staff Report
Date: June 15, 2026
To: Mayor and City Council
From: Landon Little, City Attorney
Subject: Potential Revisions to City’s Fireworks Ordinance Background
The City Council directed City Attorney to prepare potential language for amendments to the City’s current fireworks ordinance regarding with the following topics:
1. Date and Time restrictions
The proposed language limits the possession and use of legal (safe and sane) fireworks to of 12:00 noon on June 28 through 12:00 noon on July 6 from 9:00 a.m. to 11:00 p.m.
2. Supervision of Minors
The proposed language requires supervision of minors using fireworks and imposes potential liability on parents/guardians who allow for unsupervised use of fireworks by minors.
3. Social Host Liability
The proposed language would impose liability on social hosts who allow violations of this code section on or adjacent to their property.
4. Emergency Suspension of Firework Use
5. Penalties for Violations of the Fireworks Ordinance
The proposed language creates administrative penalties ($1,000 fines) for violations of the ordinance provisions. This amount is much higher than typical City administrative fines ($100). Council directed staff to explore making violations of the ordinance a misdemeanor as it pertained to illegal firework use. Use of illegal fireworks is already a misdemeanor under State law. The City can still adopt a similar provision. The City may also make violations of the additional proposed code sections a misdemeanor, though most cities have not.
Recommended action: provide additional direction to staff regarding an ordinance amendment to bring before council.
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Proposed Fireworks Ordinance Provisions
Limits on places and hours of discharge of fireworks.
A. Possession or Use of Safe and Sane Fireworks Temporarily Permitted. Notwithstanding any provisions of this chapter to the contrary, the possession of safe and sane fireworks shall be lawful only during the period of 12:00 noon on June 28 through 12:00 noon on July 6 of the same calendar year, provided, however, that it shall be unlawful to possess any modified or altered safe and sane fireworks. It shall be unlawful to use or discharge any safe and sane fireworks except between the hours of 9:00 a.m. and 11:00 p.m. on the days on which said safe and sane fireworks may be possessed.
B. Distance from Others. It shall be unlawful to throw, toss, project or position an ignited firework of any kind in such a manner as to cause the firework or contents thereof to come in contact with another person's body, private property, or real property.
C. Property Owner Consent. It shall be unlawful to ignite or otherwise use any safe and sane fireworks, or permit the discharge thereof, upon, over, or onto the property of another without the property owner's consent.
D. Distance from Dwellings. Safe and sane fireworks shall not be ignited or used within ten (10) feet of any residence, dwelling or other structure used for human habitation.
E. Distance from Gasoline or Other Flammable Liquids. Safe and sane fireworks shall not be ignited or used within one hundred (100) feet of a location where gasoline or any other flammable liquids are stored or dispensed.
F. City Property. It shall be unlawful to discharge fireworks of any type on City property, including but not limited to parks, recreation areas, or parking lots. Discharge on a City street in a residential zone is permitted so long as it does not impede or block the movement of traffic.
Supervision of minors.
Any person, irrespective of age, found in violation of any provision of this Chapter may be issued a citation in accordance with the provisions of this Chapter. Any person having the care, custody or control of a minor (under 18 years old) shall be strictly liable for permitting such minor to discharge, explode, fire or set off any safe and sane fireworks unless such minor does so under the direct supervision of a person over 18 years of age and during the hours and on the days permitted by this Chapter. Every parent, guardian or other person, having the legal care, custody or control of any person under the age of 18 years, who knows or reasonably should know that a minor is in violation of this chapter, may be issued a citation in accordance with the provisions of this Chapter, in addition to any citation that may be issued to the offending minor.
Social host liability.
A. Any social host shall be strictly liable for permitting, allowing, or promoting the possession, storage, sale, use, or discharge of fireworks in violation of this Chapter on any property, adjacent right-of-way, or other areas under their control, except that no person who has the right to use, possess, or occupy a unit in a multifamily residential property under a lease, rental agreement, or contract shall be liable for a violation of this section occurring in the common area of the property unless the person hosts, organizes, supervises, officiates, conducts, or accepts responsibility for a gathering at which the violation occurs. Liability attaches where the host knew or reasonably should have known that such fireworks activity was occurring on the property under their control.
Where the social host was present during the violation, it shall be presumed that the social host knew or reasonably should have known of the violation.
B. No social host shall permit or allow another person on private property or at a gathering on public property where the host knows or reasonably should know that the person is engaged in a violation of this Chapter.
C. No violation shall be deemed to occur, and the provisions of this social host liability section shall not apply to:
1. Conduct involving display, use, or discharge of fireworks as permitted under federal or state law; or
2. A social host who initiates contact with law enforcement or fire officials to assist in removing any person from the property or terminating the activity in order to comply with this Chapter, if the request for assistance is made before any other person contacts law enforcement or fire officials to complain about the violation of this Chapter.
Concurrent authorities.
This Chapter is not the exclusive regulation for fireworks within the City. This Chapter shall supplement and be in addition to the other regulatory codes, statutes, regulations and ordinances heretofore and hereinafter enacted by the City, the state, or any other legal entity or agency having jurisdiction.
Emergency Suspension Of Fireworks Use
A. During a declared local emergency, or when hazardous conditions exist—such as extreme fire danger, drought, red flag warnings, or any other condition posing a significant threat to public safety—the City Council may convene an emergency meeting to evaluate and decide whether to suspend the sale, possession, and/or use of all fireworks, including “safe and sane” fireworks, within city limits.
B. If the City Council determines that suspension is necessary, the suspension shall be effective for the duration of the emergency or for the period established by Council resolution.
C. The City Administrator or designee shall issue public notice of any such suspension via the City’s website, social media platforms, and other appropriate communication channels.
Administrative penalties.
A. Administrative penalties may be imposed against any person for violating any of the requirements set forth in this Chapter. Administrative citations shall be issued pursuant to Chapter 1.09, Administrative Civil Penalties, of the Gridley Municipal Code.
1. The administrative citation penalty for all violations of this Chapter shall be one thousand dollars ($1,000.00) per violation. Each violation of this Chapter shall be a separate violation. In addition, each discharge of a firework in violation of this Chapter shall be a separate violation; and as a result, subject to administrative penalties in the amount of $1,000.00 per discharge of a firework in violation of this Chapter.
City Council Agenda Item #6
Staff Report
Date: June 15, 2026
To: Mayor and City Council
From: Elisa Arteaga, City Administrator
Subject: Potential Land Exchange Between the City and Gridley Unified School District Recommendation
Receive the report regarding a potential land exchange between the City of Gridley and the School District, discuss the potential benefits and impacts of the proposal, and provide direction to staff regarding whether to pursue appraisals, utility planning analysis, park expansion feasibility, and additional due diligence before entering into negotiations.
Background
The City has discussed with Gridley Unified School district a potential land exchange involving City-owned property located within the Industrial Park (Parcel 9) and property owned by the School District.
The School District had planned construction of a future building to support operational needs.
The building has been demolished and secured with fencing. Prior to committing additional resources toward development of the proposed facility, the School District has requested confirmation if there is interest from the City regarding whether a land exchange is feasible.
At this time, no formal agreement has been negotiated and no commitment has been made by either party.
The purpose of this discussion is to provide policy direction regarding whether the City should further evaluate the proposal.
Discussion and Financial and Strategic Considerations
There is no immediate fiscal impact associated with consideration of this discussion item.
However, if the City Council directs staff to further evaluate the proposal, the City may incur costs associated with due diligence activities, including appraisal services, engineering review, environmental analysis, legal review, title review, surveying, and transaction-related services.
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Estimated due diligence costs may include:
Potential Cost Estimated Cost
Property Appraisal $5,000 - $10,000
Legal Review and Transaction Documents $5,000 - $15,000 Title Review and Escrow Services $2,000 - $5,000
Engineering and Utility Analysis $5,000 - $20,000
Environmental Review (if required) TBD
Surveying and Mapping Services $3,000 - $10,000
Staff Time and Administrative Review Existing Resources The School District has reported investing approximately $109,026 in the property through acquisition-related expenses and site improvements, including:
Description Amount
Escrow and Back Taxes $40,000
Property Abatement $22,800
Demolition Activities $42,226
Site Fencing $4,000
Total Investment to Date $109,026
While these expenditures do not establish market value, they represent investments already made toward improving the property.
The City-owned industrial parcel (Parcel 9) has not been appraised. Therefore, staff is unable to determine whether the properties are of comparable value or whether compensation may be required as part of a future transaction. Initially, the property was designated to be utilized by the city for future public works corporation yard site.
The City should also consider the potential opportunity costs associated with exchanging Parcel 9, including:
• Reduction in available industrial city land inventory; • Reduced flexibility for future sewer and wastewater infrastructure projects; • Potential impacts to future economic development initiatives; and • Potential future land acquisition costs should the City require additional property for utility or infrastructure expansion.
Conversely, acquisition of the School District parcel may provide long-term public benefits and cost avoidance opportunities through expansion of the adjacent City park and preservation of land for future public use.
Potential public benefits include:
• Expansion of existing park facilities and recreational programming; • Additional open space and recreational opportunities; • New playgrounds, sports facilities, walking paths, and picnic areas; • Additional space for community events and public gatherings; • Enhanced youth and recreation programming;
• Improved connectivity between public facilities;
• Increased eligibility for state and federal park grant opportunities; • Preservation of public open space; and
• Reduced future land acquisition costs associated with park expansion.
Should the City acquire the School District parcel, future costs may also include:
• Property maintenance and landscaping;
• Irrigation and utility costs;
• Security and vandalism prevention measures;
• Park operations and maintenance;
• Capital improvements associated with future park expansion; • Environmental remediation, if identified; and
• Future construction costs associated with public use improvements.
Depending upon the scope of future improvements, park expansion and development costs could range from several hundred thousand dollars to several million dollars. However, staff notes that grant funding opportunities may be available to offset a portion of these future costs.
Because Parcel 9 has not been appraised and future development plans for both properties remain undefined, a complete financial analysis cannot be performed at this time. Staff recommends completion of appraisal, engineering, legal, and planning analyses prior to any decision regarding a potential land exchange.
The School District has invested approximately $109,026 toward acquisition-related expenses, site remediation, demolition, and security improvements. These expenditures have improved site conditions and reduced potential liabilities associated with the property.
While these costs reflect investments made by the School District, they do not establish market value. The City-owned industrial parcel has not been appraised, and staff has not completed an analysis of the property's fair market value, development potential, or future economic benefit.
Benefits of Retaining Industrial Park- Parcel 9
Parcel 9 represents a valuable public asset and serves multiple strategic purposes. Potential benefits include:
• Future industrial and commercial development opportunities; • Job creation and economic growth;
• Future utility revenue generation;
• Expansion of the City's economic base;
• Potential future property tax benefits;
• Strategic location for future public infrastructure.
Staff has also identified the parcel as a potential location for future municipal utility infrastructure, including:
• Sewer system expansion;
• Wastewater treatment-related facilities;
• Lift stations;
• Utility storage and operations facilities;
• Public works support infrastructure; and
• Other capital improvement projects necessary to accommodate future growth and regulatory requirements.
• Relinquishing ownership of Parcel 9 could limit future options available to the City for utility planning and infrastructure development.
•
Benefits of Acquiring the School District Parcel
Acquisition of the School District parcel may provide significant public benefits beyond its market value.
GUSD – Parcel (.37 acre) 198 Washington Street
The property is located adjacent to Mannuel Vierra Park, creating a unique opportunity for future park expansion and enhancement of recreational amenities available to the community.
Potential benefits include:
• Expansion of existing park facilities;
• Additional open space and recreational opportunities; • New playgrounds, sports facilities, walking paths, and picnic areas; • Additional space for community events and gatherings; • Enhanced youth and recreation programming;
• Improved connectivity between public facilities;
• Increased eligibility for park and recreation grant funding opportunities; • Preservation of land for future public use; and
• Enhanced quality of life for residents.
The proximity of the property to the existing park may also reduce future land acquisition costs associated with park expansion and create a larger contiguous public-use area.
Timing Considerations
Timing is an important consideration for both agencies.
The School District has expressed interest in constructing a future building and must determine whether it should proceed with planning and development activities on its existing property.
The District has requested direction from the City regarding its interest in pursuing a potential land exchange so that informed decisions can be made regarding future investments and development plans.
Without direction from the City, the School District may need to proceed with development of its existing property to meet operational timelines and facility needs. Providing direction at this stage would allow both agencies to determine whether continued evaluation is warranted before additional investments are made.
Additional Land Exchange Considerations
Since Parcel 9 was previously approved to be retained by the City for future development purposes, alternative transaction structures may also be considered.
Potential options include:
• A direct land exchange between the City and School District; • Acquisition of the School District parcel for future public use; • Retention of Parcel 9 for future economic development and utility needs; or • Other mutually beneficial alternatives.
•
Since Parcel 9 was approved to be retained by the City for future development, the city may propose swapping the land and retaining the school district parcel for a public use for $0 (or selling the school district parcel for fair market value). Taxing entities participating in any applicable compensation agreement may need to review and agree to the terms of a proposed transaction depending on the structure of the exchange and any impacts to tax allocation or revenue sharing.
DUE DILIGENCE CONSIDERATIONS
Prior to any formal negotiations or agreement, staff recommends completion of the following:
1. Independent appraisal of Parcel 9.
2. Review of available valuation information for the School District property.
3. Title review and identification of easements and encumbrances.
4. Environmental review and CEQA analysis (if applicable)
5. Utility and infrastructure planning review.
6. Analysis regarding future infrastructure utility system needs.
7. Evaluation of zoning and General Plan consistency.
8. Assessment of economic development impacts.
9. Evaluation of park expansion opportunities and community benefits.
10. Legal review of transaction structure and statutory requirements.
11. Analysis of tax-sharing and compensation agreement implications.
CITY COUNCIL OPTIONS FOR CONSIDERATION
Option 1
Direct staff to continue evaluating the proposal and complete due diligence activities.
Option 2
Direct staff to obtain an appraisal of Parcel 9 before determining whether a land exchange should be pursued.
Option 3
Direct staff to evaluate alternative transaction structures, including acquisition, exchange, sale, or retention of the properties.
Option 4
Determine that Parcel 9 should remain reserved for future economic development, sewer infrastructure, utility operations, or other municipal purposes.
Option 5
Provide conceptual support for staff to continue discussions with the School District while reserving final approval authority to the City Council.
CONCLUSION
The proposed land exchange presents both opportunities and challenges for the City.
Parcel 9 may provide significant future value for utility infrastructure, wastewater planning, and municipal operations. Conversely, acquisition of the School District parcel presents a unique opportunity to expand an existing city park (Manuel Vierra Park) and enhance recreational opportunities for the community.
The School District has invested approximately $109,026 in the property and is evaluating plans for future building construction. As a result, timely direction from the City Council would assist both agencies in determining whether further exploration of a land exchange is warranted.
Staff recommends that the City Council provide direction regarding whether additional appraisal, engineering, park planning, legal review, and infrastructure analyses should be conducted before entering into formal negotiations.
City Council Agenda Item #7
Staff Report
Date: June 15, 2026
To: Mayor and City Council
From: Elisa Arteaga, City Administrator
Subject: Chamber of Commerce Donation
Recommendation
Receive the request from the Gridley Area Chamber of Commerce and provide direction regarding whether to continue providing financial support for Fiscal Year 26/27 and, if so, the amount of funding to be allocated.
Background
The Gridley Area Chamber of Commerce has submitted a request for continued City support. The Chamber has historically received a donation in the amount of $10,000 from the City to assist with its operations and community activities.
The Chamber’s request highlights its continued involvement in community events, support of local businesses, coordination of activities such as Red Suspenders Day, Winter Wonderland, National Night Out, and other community-focused programs. The Chamber has also provided information regarding volunteer hours contributed toward community events and operations.
The Chamber has requested continued assistance due to increased operating costs, including an increase in monthly office rental expenses.
As Council considers this request, it is important to note that General Fund revenues continue to be monitored closely. While the City recognizes the value of community partnerships and the services provided by local organizations, all General Fund expenditures are evaluated as part of the City’s overall financial planning and long-term sustainability efforts.
Council may wish to consider the continued level of support, the amount of funding to provide, or provide any other direction regarding future contributions.
Fiscal Impact
The requested donation would be funded through the City’s General Fund. The fiscal impact will depend on the amount of funding authorized by Council.
Attachment
Gridley Area Chamber of Commerce Donation Request Letter X Regular
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City Council Agenda Item #8
Staff Report
Date: June 15, 2026
To: Mayor and City Council
From: Elisa Arteaga, City Administrator
Subject: Gridley Sports Complex Ph 1 – Change Order #7 (PCO 07): Revised Sports Lighting Foundations, Site Remediation, and Project Schedule Extension Recommendation
City staff respectfully recommend that the City Council authorize the City Administrator to execute Change Order No. 7 (PCO 07) with Franklin Construction, Inc. in the amount of $363,040.00 for the revised sports lighting foundations, associated site remediation, and delay-related costs resulting from unsuitable soil conditions encountered during construction. Approval of this change order will increase the total construction contract amount to $3,071,181.97 and the total estimated project cost to $4,104,412.73, with a revised project completion date of approximately October 2026.
Background
On August 18, 2022, the City received a letter from the California Department of Parks and Recreation confirming selection for funding through Proposition 68’s Rural Recreation and Tourism Program (RRT).
The City was awarded a $3,000,000 grant for the design and construction of Phase 1 of the Gridley Sports Complex, which includes multi-use sports fields with lighting, shade trees, educational signage, a restroom/concession stand, a safe changing space, benches and tables, and a drinking fountain with bottle refill station.
On January 21, 2025, the City Council authorized a construction contract with Franklin Construction, Inc. in the amount of $2,466,672.00 (base bid plus Alternative Bids #1 and #2) and approved a construction budget of $2,713,339.00, inclusive of a 10% contingency. The original contract schedule established an anticipated completion date of October 2025.
Geotechnical Issues and Foundation Redesign
During construction, high groundwater and loose, liquefiable sandy soils were encountered at all seven planned sports lighting pole locations, rendering the original drilled pier foundation design infeasible. A targeted geotechnical investigation (GI) was performed by Crawford & Associates at all seven pole locations to depths of approximately 40 to 60 feet. Results revealed groundwater at depths ranging from 9.5 to 15 feet and liquefiable soil extending from 6 to 47 feet deep across the site.
Due to these conditions, a Site Class F designation was assigned to the site, triggering a requirement for a Site-Specific Response Analysis (SRA) by a qualified third-party consultant. The SRA informed a complete redesign of the sports lighting foundations by Musco Lighting in coordination with Bennett Engineering Services (BENEN). The approved Amendment #4 to the BENEN task order covered the cost of the additional geotechnical and SRA work.
The revised foundation design calls for:
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• Five (5) 42-inch diameter x 30-foot deep suspended pier foundations with full-depth rebar reinforcement
• Four (4) 42-inch diameter x 35-foot deep suspended pier foundations with full-depth rebar reinforcement
Impact on Construction Schedule and Site Conditions
The foundation redesign process resulted in an extended construction delay spanning from late 2025 into 2026. Work that had been underway or completed prior to the design hold — including irrigation riser installation and initial site preparation — was left in place during this period. As a result of the delay, the following additional work is now required:
• Remobilization of contractor equipment and crew after the extended redesign period. • Lowering of previously installed irrigation risers to accommodate regrading operations, with subsequent raising to operational height after foundation installation. • Clear and grub of vegetation (weeds) that developed across the pond bottom and field slopes during the winter and spring months.
• Restaking of all light foundation locations following site clearing. • Completion of landscape planting and seeding in 2026 rather than 2025, resulting in increased labor and material costs for the landscape subcontractor (Marina Landscape).
The project completion date has been revised from October 2025 to approximately October 2026.
Scope of Change Order #7 (PCO 07)
Franklin Construction, Inc. submitted PCO 07 on June 2, 2026, covering the following items:
Item Description Amount
01 Remobilization after extended redesign delay $4,885.00 02 Lower irrigation risers in preparation for regrading $20,757.00 03 Clear and grub vegetation (pond bottom and slopes) $31,092.00 04 Sports lighting surveying and restaking $4,945.00
05 Install revised sports lighting foundations per updated geotechnical and Musco design
$248,864.00
06 Landscape delay costs – Marina Landscape (2026 vs. 2025 labor and material increases)
$52,497.00
PCO 07 Total $363,040.00
Financial Impact
Approval of Change Order #7 will increase the total estimated project cost from $3,741,372.73 to $4,104,412.73.
To recap, $3 million is covered by the grant. Approval of this request would result in the City covering the remaining $1.1 million.
The following table summarizes the updated project cost:
Sports Complex Phase 1 – Cost Summary
Item Amount
Base Bid (Contract Award – January 2025) $2,466,672.00
10% Construction Contingency $246,667.00
CO #1 – Cut & Abandon Water Services (06/24/2025) $27,280.00 CO #2 – Revised Hydraway Drainage (06/26/2025) $31,472.00 CO #3 – Remove Fabric Under Chip Seal (08/21/2025) $2,912.47 CO #4 – Light Pole Foundation (08/21/2025) $45,380.50
CO #5 – Unsuitable Soils (08/26/2025) $134,425.00
Construction Subtotal (Base Bid + Contingency + CO #1–#5) $2,954,409.97 Bennett Engineering Contract w/ Subs (Amend. #1–#4) $466,419.70 Unico Engineering – Construction Management & Inspection $99,614.03 City Staff Work & Materials (Concession Stand, Benches, Transformer, Signs, Bike Racks, City Time)
$462,000.00
Total Estimated Project Cost (Prior to PCO 07) $3,741,372.73 Consideration for Approval
PCO 07 – Revised Sports Lighting Foundations, Site Remediation & Delay Costs $363,040.00 REVISED TOTAL ESTIMATED PROJECT COST (If Approved) $4,104,412.73 Funding Sources
Proposition 68 RRT Grant Award $3,000,000.00
Unfunded Amount (General Fund / Future Grants) $1,104,412.73 Total $4,104,412.73
Staff will continue to explore grant and additional funding opportunities to offset the unfunded portion of the project. The remaining work — including sports lighting foundation installation, irrigation adjustments, landscape planting and seeding, and final site improvements — is expected to be completed by approximately October 2026 to satisfy Proposition 68 grant program completion requirements.
Additional Council Considerations – Proposition 68 Grant Scope Staff has had preliminary discussions with the California Department of Parks and Recreation regarding the project’s budget overrun. The State has indicated that there may be an option to reduce the scope of the Proposition 68 grant in order to bring the project within a manageable budget. However, it is not clear at this time whether a scope reduction would result in a corresponding reduction in the grant award amount, and there is no guarantee that pursuing this path would result in a timely resolution. Any scope reduction process would also likely introduce additional delays to project completion.
Staff presents this as information for Council’s consideration. Council may wish to direct staff to continue discussions with the State regarding scope reduction options, or alternatively, direct staff to proceed with the change order as recommended and identify funding to cover the unfunded project balance. Council may also choose to continue this item to a future meeting pending further information from the State.
Compliance with City Council Strategic Plan or Budget Goals The City Council and City staff are committed to providing effective leadership while providing quality cost-effective local government services.
Attachments
• PCO 07 Proposal – Franklin Construction, Inc. (dated June 2, 2026), $363,040.00 Proposal for:
GSC_PCO 07_Revised Sports Lighting Foundations
from
Bid Date:
Time: 2:00PM
6/02/2026 Franklin Construction, Inc.
License: 567469 Type: A
685 Kentucky St.
217 Flume Street, Suite 200, Chico, CA 959285427
City Of Gridley
(530) 343-9600
Gridley, CA 95948 Project No. 25008
Item Description Quantity Unit Unit Price Total Price
PCO Potential Change Order Costs
01 Mobilization 1.00 LS 4,885.00 4,885.00
02 Lower Irrigation 1.00 LS 20,757.00 20,757.00
03 Clear And Grub 1.00 LS 31,092.00 31,092.00
04 Sports Lighting Surveying 1.00 LS 4,945.00 4,945.00
05 Install New Sports Lighting Foundations 1.00 LS 248,864.00 248,864.00 06 Landscape Delay Costs 1.00 LS 52,497.00 52,497.00
Total: 363,040.00
Total For Potential Change Order Costs 363,040.00
Total: 363,040.00
CA License #567469
DIR Registration #1000004305
Attachment Enclosed
6/02/2026 2:41 pm
Estimator: Myles MacColl Generated by a SharpeSoft Product Job Conditions - Attachment 'A'
GSC_PCO 07_Revised Sports Lighting Foundations
Special Conditions:
1. This proposal only includes working under favorable conditions where soil and/or aggregate moisture contents are at or below optimum moisture content for compaction. This Proposal does not include dewatering, mechanically or chemically processing soil or aggregates to dry them or working under wet conditions that do not allow earthwork, soil compaction, placement of aggregates, or placement of asphalt paving to be done using normal practices.
2. Escalation: This Proposal is based on current market Prices for aggregate, concrete, petroleum fuels, and oil. If during the duration of this project, the Price of these elements increases, the owner will be charged for the direct increase in equipment fuel, trucking, and material costs that occurs.
3. Work Week: This Proposal is based on working a standard Monday-Friday work week.
4. This proposal is predicated upon the commitment to execute the work in a productive and efficient manner, with the primary aim of offering the Owner the most competitive pricing possible. This proposal does not include, unless otherwise specified in the “Scope of Work” below, multiple mobilizations or phasing of work.
5. Access to the designated work area shall be free and unobstructed throughout the duration of our mobilization(s). Any hindrances, delays, or disruptions to our work resulting from the lack of such access shall be subject to additional compensation.
Change Order Request - Scope of Work:
Item 01 includes the additional labor and equipment costs required to remobilize after the extended delay during redesign of the sports lighting foundations.
Item 02 includes the labor and equipment required to lower all of the irrigation risers in preparation for weed abatement and removal. Due to the irrigation risers for the heads already being installed prior to redesign delays, this work is considered additional work.
Item 03 includes the labor and equipment required to remove the vegetation from the pond bottom and slopes after mowing/spraying of weeds that have developed during the redesign delay. Price is based on a 5 man crew with equipment for 2 days to remove the excess vegetation.
Item 04 is the additional staking costs required to stake for the geotechnical engineer to conduct test borings as directed by the city. This price also includes restaking of the light foundations after the site has been cleared and grubbed for installation of the light foundations. Restaking costs are additional work due to the foundation redesign delay.
Item 05 represents the additional costs required to install the new lighting foundations in accordance with the updated geotechnical report and Musco light foundation design. This additional costs is due to the liquefied soils encountered during the initial installation of the original lighting foundation design which required a redesign of the light foundations. The revised scope calls for 5 EA 42" diameter x 30' deep suspended pier foundations with full-depth rebar reinforcement and 4 EA 42" x 35' deep suspended foundations with full-depth rebar reinforcement.
Item 06 includes the additional costs for Marina Landscape to complete their work in 2026 vs. 2025 includes labor and material increases.
Bid Documents Referenced in Proposal
Revised Geotechnical preliminary report by Crawford & Associates. 6/02/2026 2:41PM
Estimator: Myles MacColl
For Job: GSC_PCO 07_Revised Sports Lighting Foundations Generated by a SharpeSoft Product Job Conditions - Attachment 'A'
GSC_PCO 07_Revised Sports Lighting Foundations
6/02/2026 2:41PM
Estimator: Myles MacColl
For Job: GSC_PCO 07_Revised Sports Lighting Foundations Generated by a SharpeSoft Product
City Council Agenda Item #9
Staff Report
Date: June 15, 2026
To: Mayor and City Council
From: Martin Pineda, Finance Director
Subject: FY 2026/2027 Budget - Approval
Recommendation
Staff respectfully requests the City Council approve the FY 2026-2027 Budget.
Background
The first budget study session took place on 06/04/2025 where the Finance Director gave an overview of the budget. The Finance Director also talked about the overview or expenses projections, revenue projections, and economic outlook of the City for FY 2026-2027.
There have been changes to the budget since it was presented to the public and council. These changes are listed below:
General Fund:
• Part-time Administrative Secretary was added for a total of $30,000. This will be allocated to multiple departments.
o This addition was to allow staff to focus on Code Enforcement projects while meeting residential requests and customer service.
• Removed Fund 933 from Engineering page.
• Added $2,500 to 010-4350-54000 for miscellaneous Playground Replacement/Maintenance.
• Added the following to Fund 060 – General Fund Equipment Reserve:
o $75,000 – Security for Corp Yard.
o $200,000 – New PW Building.
o $35,000 – Mower for parks (Gridley Sports Complex).
o $100,000 – Crack Sealer for Streets.
o $275,000 – New Street Sweeper.
Electric:
• Small increase due to addition of PT Admin Secretary.
Water:
• Added $50k to Engineering Costs.
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o This addition is part of CIP to begin the removal process of Arsenic Removal in the city well.
o $200,000 was added to reserves in FY 2025-2026. We will be transferring from reserves to cover this cost.
• Small increase due to addition of PT Admin Secretary. • Added $100,000 to 630-4630-56300 (Water Equipment) for Well Equipment Replacement on Little Avenue.
• Added the following to Fund 640 – Water Capital (Water Reserve):
o $65,000 – 7-yard Bobtail Dump Truck (to be split with Sewer).
Sewer:
• Small increase due to addition of PT Admin Secretary. • Added $50,000 to 650-4652-56300 (Sewer Town) for Sewer Back up Pumps. • Added the following to Fund 660 – Sewer Capital (Sewer Reserve):
o $80,000 – ¾ Ton Pick Up.
o $65,000 – 7-yard Bobtail Dump Truck (to be split with Water).
Miscellaneous:
• Sports Complex Revenue was corrected to actual (Fund 933). • Added HVAC Replacement for the museum ($25,000) – To be charged to Carbon Credit Fund (Fund 928).
• Added Gridley Sports Complex page.
o Corrected the Revenue/Expense projections.
• Added Feather River Sewer Crossing page.
Fiscal Impact:
The Proposed FY 2025-2026 Operating Budget is the staff’s comprehensive effort to present a policy document which preserves fiscal stability and at the same time enables the City Council and staff to accomplish crucial projects and services. Adopting a proposed budget which enables the City to sustainably and efficiently provide services is one of the most important duties a City Council can participate in.
PDF Version: ClearGov | Documents
Interactive Version: https://city-gridley-ca-cleardoc.cleargov.com/24510/964319/d ATTACHMENTS:
1.) A link to the budget is attached to this staff report.
2.) Resolution No. 2025‐R‐xxx: A Resolution of the City of Gridley City Council Establishing the FY 2026‐2027 Appropriations Limit for the City of Gridley
3.) Resolution No. 2025‐R‐xxx: A Resolution of the City of Gridley Adopting a Budget for Fiscal Year 2026‐2027.
RESOLUTION NO. 2026-R-019
A RESOLUTION OF THE CITY OF GRIDLEY CITY COUNCIL ADOPTING A BUDGET FOR FISCAL YEAR 2026-2027
WHEREAS, a Proposed Annual Operating Budget for Fiscal Year 2026-2027 was presented to the City Council of the City of Gridley and Gridley community members a public Council meeting on June 4th and a regular meeting on June 15th 2026; and WHEREAS, the Council desires to incorporate the proposed changes, additions, and deletions discussed at the various public budget meetings into the Proposed FY 2026-2027 Operating Budget as provided in the records of the pertinent meetings; and NOW, THEREFORE, IT IS HEREBY RESOLVED that the City Council of the City of Gridley does hereby adopt the Annual Operating Budget for the City for FY 2026-2027, as described above and attached Exhibit A
I HEREBY CERTIFY that the foregoing resolution was duly introduced and passed at a special meeting of the City Council of the City of Gridley held on the 15th day of June 2026, by the following vote:
AYES: COUNCIL MEMBERS
NOES: COUNCIL MEMBERS
ABSTAIN: COUNCIL MEMBERS
ABSENT: COUNCIL MEMBERS
ATTEST: APPROVED:
____________________________ ______________________________ Elisa Arteaga, City Administrator Michael W Farr, Mayor RESOLUTION NO. 2026-R-020
A RESOLUTION OF THE CITY OF GRIDLEY CITY COUNCIL
ESTABLISHING THE FY 2026-2027 APPROPRIATIONS LIMIT FOR THE CITY OF GRIDLEY WHEREAS, SB 1352 was enacted by the California State Legislature during the 1980 Session which specifically adds Division 9, Chapter 1205 (commencing with Section 79000) to Title 1 of Government Code; and
WHEREAS, SB 1352 was enacted to provide for the implementation of voter approved Proposition 4, also known as the “Gann Initiative” whose purpose was to limit governmental appropriations; and
WHEREAS, the voters of California did approve Proposition 111 in June 1990, which, among other provisions, allows for new adjustment formulas for calculating the City’s annual appropriations limit; and
WHEREAS, the appropriations limit has been calculated for the City of Gridley by the City Finance Department in accordance with the Uniform Guidelines for Implementation of the Gann Initiative and Proposition 111, as promulgated by the League of California Cities.
NOW, THEREFORE, IT IS HEREBY RESOLVED by the City Council of the City of Gridley as follows:
1.) For fiscal year 2026-2027, the City Council approved the selection and usage of the “California Per Capita Income” percentage change and the population growth percentage increase for the City of Gridley when calculating that year’s appropriations limit. The FY 2026-2027 appropriations limit may be amended at some future date due to a change in the factor used in this calculation. The choice of factors to be used for the FY 2026-2027 calculation was limited to use of the California Per Capita Income change due to the unavailability of the “percentage change in the local assessment roll from the preceding year due to the addition of local nonresidential construction in the City”. (The County of Butte, Assessor’s Office reports this factor has not been determined.) Therefore, when the factor depicting the percentage chance in the local assessment roll from the preceding year due to the addition of local non-residential construction in the City is available, should it be greater than the California Per capita Income factor, the FY 2025-2026 Appropriations Limit could be recalculated to reflect the higher factor.
2.) The Appropriations Limit is hereby established for the City in the amount of $25,709,504 for fiscal year 2026-2027 in conformance with the attached Exhibit A and Article XIIIB of the Constitution as amended.
I HEREBY CERTIFY that the foregoing resolution was duly introduced and passed at a special meeting of the City Council of the City of Gridley held on the 16th day of June 2025, by
the following vote:
AYES: COUNCIL MEMBERS
NOES: COUNCIL MEMBERS
ABSTAIN: COUNCIL MEMBERS
ABSENT: COUNCIL MEMBERS
ATTEST: APPROVED:
_______________________________ ________________________________ Elisa Arteaga, City Administrator Michael W Farr, Mayor City Council Agenda Item #10
Staff Report
Date: June 15, 2026
To: Mayor and City Council
From: Christopher Smith, Principal Planner
Subject: Approval of a Resolution Accepting Eight (8) Standalone Public Infrastructure and Utility Easement Deeds for Phase I and Phase II of the Orchard View Apartments Project Located at 1425 Highway 99 (APNs: 021-110-052, 021-110-054, and 021- 110-055)
Recommendation
City staff recommends that the City Council adopt Resolution No. 2026-R-020, accepting eight (8) separate perpetual easement deeds for electrical, water, wastewater, and storm drain utility networks from Gridley Orchard Associates, LP, and authorizing City Administrator/City Clerk Elisa Arteaga to execute the accompanying Certificates of Acceptance for formal recording.
Overview
The developer of the Orchard View Apartments complex, Gridley Orchard Associates, LP, has finalized the necessary technical legal descriptions and surveyor plat maps to transfer the full suite of public utility and municipal access easements over to the City of Gridley. This comprehensive action addresses both Phase I and Phase II of the development.
Accepting these standalone instruments satisfies explicit conditions of approval linked to the underlying development entitlements. To satisfy the mandatory provisions of California Government Code Section 27281, a formal resolution of acceptance passed by the City Council must be affixed to each document before the county recorder can accept them.
Background
On February 6, 2023, the City Council approved Tentative Subdivision Map No. 1-23 (TSM 1-23) via Resolution No. 2023-R-002, paving the way for multi-family affordable housing allocations along the West side of Highway 99. The subsequent final map, "Orchard View Apartments Parcel Map 1-23", recorded on June 21, 2023, across Map Book 207, Pages 46–49.
The apartment structures are situated on Parcels 2, 4, and 5 of the maps. Since multi-family housing complexes are constructed on unified parcels rather than traditional standalone singlefamily lots, inside-the-gate municipal utility lines cannot simply be dedicated on the face of a standard final map. Instead, they require separate, standalone utility easement deeds reviewed and stamped by a licensed land surveyor.
X Regular
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DISCUSSION & ANALYSIS
The combined package includes eight (8) separate deeds establishing explicit surface and subterranean municipal infrastructure rights over portions of APNs 021-110-052, 021-110-054, and 021-110-055. The instruments are categorized below by phase and distinct infrastructure discipline:
Phase I Infrastructure System
• Electrical Maintenance & Access: Protects a variable-width underground power feed alignment totaling 16,074 square feet.
• Storm Drainage Systems: Secures a 5.00-foot-wide strip running parallel with the western project perimeter line to handle local runoff collections, totaling 2,796 square feet.
• Sanitary Sewer Systems: Sets aside a primary trunkline path totaling 17,919 square feet to manage wastewater collection safely.
• Water Supply Framework: Guarantees domestic water line access and looping water main line protection patterns.
Phase II Infrastructure System
• Electrical Maintenance & Access: Accommodates late-phase power loops, transformer footprints, and connection points.
• Storm Drainage Systems: Encompasses additional on-site stormwater retention release points and localized catch basins.
• Sanitary Sewer Systems: Secures secondary multi-family block collection branch connections.
• Water Supply Framework: Covers main service meters and emergency fire hydrant service laterals.
All engineering plans and deeds were prepared and verified by civil firm Robertson Erickson and certified as technically complete by Malcolm J. Macdonald, PLS 8218. Execution signatures from the general partners have been formally recorded and notarized. Council adoption will clear City Administrator/City Clerk Elisa Arteaga to add the city's signature certificates so the property rights can be recorded at the county.
Financial Impact
Adopting this resolution presents no negative impact to the City of Gridley General Fund.
Attachments
1. Resolution No. 2026-R-020
2. Executed Phase I Easement Deeds Package (Electrical, Storm Drain, Sanitary Sewer, Water)
3. Executed Phase II Easement Deeds Package (Electrical, Storm Drain, Sanitary Sewer, Water)
RESOLUTION NO 2026-R-021
A RESOLUTION OF THE CITY COUNCIL OF THE CITY OF GRIDLEY ACCEPTING EIGHT (8)
SEPARATE PERPETUAL EASEMENT DEEDS FOR PUBLIC UTILITY CONVEYANCE, ACCESS, AND
INFRASTRUCTURE MAINTENANCE SERVING PHASES I AND II OF THE ORCHARD VIEW APARTMENTS PROJECT LOCATED AT 1425 HIGHWAY 99 (APNS: 021-110-052, 021-110-054, AND 021-110-055)
WHEREAS, the City of Gridley previously approved Tentative Subdivision Map No. 1-23 via Resolution No. 2023-R-002 on February 6, 2023, for the development of the multi-family affordable housing complex known as the Orchard View Apartments; and, WHEREAS, the final subdivision map titled "Orchard View Apartments Parcel Map 1-23" was officially recorded on June 21, 2023, in Map Book 207, at Pages 46 through 49 in the official records of the Butte County Recorder; and,
WHEREAS, the multi-family affordable housing development has been assigned the physical address of 1425 Highway 99, Gridley, CA 95948, and encompasses Parcels 2, 4, and 5 of said recorded map, affecting Assessor’s Parcel Numbers (APNs) 021-110-052, 021-110-054, and 021- 110-055; and,
WHEREAS, the project's Conditions of Approval require the developer to dedicate permanent public civil infrastructure and utility easements to the City of Gridley to guarantee long-term operational access for electrical, water, sanitary sewer, and storm drainage distribution frameworks; and,
WHEREAS, the developer, GRIDLEY ORCHARD ASSOCIATES, A CALIFORNIA LIMITED PARTNERSHIP (“Grantor”), has executed and tendered eight (8) separate standalone perpetual Easement Deeds to the City of Gridley, organized as follows:
Phase I Utility Easements:
1. Electrical Maintenance & Access Easement: Conveying a variable-width easement of 16,074 square feet.
2. Storm Drain Easement: Conveying a 5.00-foot-wide drainage easement of 2,796 square feet.
3. Sanitary Sewer Easement: Conveying a variable-width wastewater easement of 17,919 square feet.
4. Water Easement: Conveying a dedicated public water system easement as described in the accompanying legal description and plat map.
Phase II Utility Easements:
5. Electrical Maintenance & Access Easement: Conveying a secondary electrical distribution infrastructure network corridor.
RESOLUTION NO 2026-R-021
6. Storm Drain Easement: Conveying a secondary stormwater drainage and discharge easement block.
7. Sanitary Sewer Easement: Conveying a secondary wastewater collection line layout framework.
8. Water Easement: Conveying a secondary dedicated public water main line distribution easement.
WHEREAS, California Government Code Section 27281 dictates that deeds or real property conveyances to a political municipality cannot be accepted for recordation without the formal, written consent of the governing legislative body evidenced by its resolution of acceptance attached directly to the deed instrument; and,
WHEREAS, the City Engineer and Public Works Department have re-evaluated the full set of eight deeds alongside their corresponding verified surveyor plat maps and legal descriptions prepared by Malcolm J. Macdonald, PLS 8218, finding them technically sound and complete.
NOW, THEREFORE, BE IT RESOLVED by the City Council of the City of Gridley as follows:
SECTION 1. The recitals set forth above are true and correct and are fully incorporated herein by reference.
SECTION 2. Pursuant to California Government Code Section 27281, the City Council hereby officially accepts the property interests, explicit municipal rights-of-way, and terms conveyed within the eight (8) separate Easement Deeds described herein and attached to this package.
SECTION 3. The City Council hereby authorizes and directs City Administrator/City Clerk Elisa Arteaga to execute the standard statutory Certificate of Acceptance on behalf of the City for all eight (8) individual Easement Deeds.
SECTION 4. The City Administrator/City Clerk is hereby authorized and directed to attest to this resolution and forward the complete, fully executed easement packages inclusive of the signed Deeds, Notary Acknowledgments, Legal Exhibits, and Certificates of Acceptance to the Butte County Recorder’s Office for formal recordation.
I HEREBY CERTIFY that the foregoing resolution was introduced and passed at a regular City Council meeting of the City of Gridley held on this 15th day of June, 2026, by the following vote:
AYES: COUNCIL MEMBERS
NOES: COUNCIL MEMBERS
ABSENT: COUNCIL MEMBERS
RESOLUTION NO 2026-R-021
ABSTAIN: COUNCIL MEMBERS
ATTEST: APPROVE:
______________________ _______________________
Elisa Arteaga, City Clerk Michael W. Farr, Mayor
City Council Agenda Item #11
Staff Report
Date: June 15, 2026
To: Mayor and City Council
From: Elisa Arteaga, City Administrator
Subject: Adoption of Updated City of Gridley Public Works Construction Standards Recommendation
City staff respectfully recommends that the City Council adopt a Resolution 2026-R-021: a resolution approving and adopting the updated City of Gridley Public Works Construction Standards for public infrastructure improvements and authorizing their use for all applicable public and private development projects within the City.
Background
The City of Gridley maintains Public Works Construction Standards to establish uniform requirements for the design and construction of public infrastructure improvements including streets, sidewalks, utilities, drainage facilities, and related public improvements.
The current standards required updates to reflect:
• Current engineering and construction practices;
• Revised accessibility requirements and ADA standards; • Updated State and federal regulations;
• Coordination with current Caltrans Standard Plans and Specifications; • Modern materials and construction methods; and
• Consistency with the City’s development and capital improvement requirements.
City staff and the City Engineer have completed a comprehensive review and update of the City’s Public Works Construction Standards. The updated standards are intended to improve consistency in project design and construction, streamline plan review and project delivery, reduce maintenance issues, and ensure public improvements are constructed in accordance with current engineering standards and regulatory requirements.
The updated standards will apply to future City capital improvement projects and applicable private development projects requiring public infrastructure improvements within the City of Gridley.
Adoption of the updated standards will provide clear and consistent guidance to developers, engineers, contractors, and City staff regarding the City’s infrastructure design and construction requirements.
X Regular
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Emergency
Correction of Document Name. The document made available for public comment was published under the title “City of Gridley Standard Details and Specifications.” This title did not reflect the correct designation required by the Gridley Municipal Code. Pursuant to GMC §15.06.010, which authorizes the City to adopt public works construction standards by resolution, and GMC §16.03.030, which establishes the “Department of Public Works Construction Standards” as the authoritative guide for land use and infrastructure within the City, the correct title of the document is the “City of Gridley Public Works Construction Standards.” The document has been retitled accordingly for adoption. The public comment period was not affected by this naming discrepancy, as the substance and content of the document were unchanged.
Financial Impact
There is no direct fiscal impact associated with adoption of the updated Public Works Construction Standards.
Implementation of the updated standards is expected to improve long-term infrastructure quality, reduce maintenance costs, and improve consistency in public improvement construction throughout the City.
Compliance with City Council Strategic Plan or Budget Goals The City Council and City staff are committed to providing effective leadership while providing quality cost-effective local government services. The updated standards and details will assist developers in meeting the expectations of the City with their designs prior to submittal for plan check and review by City staff. Additionally, these updated details and standards reflect current industry standards ensuring that future modifications to new infrastructure are limited.
Attachments
• Resolution 2026-R-021: Adopting Updated City of Gridley Public Works Construction Standards • Updated City of Gridley Public Works Construction Standards RESOLUTION NO. 2026-R-022
A RESOLUTION OF THE CITY COUNCIL OF THE CITY OF GRIDLEY ADOPTING THE 2026 PUBLIC
WORKS CONSTRUCTION STANDARDS AND ESTABLISHING THOSE STANDARDS AS THE
CONTROLLING AUTHORITY FOR PUBLIC WORKS DESIGN AND CONSTRUCTION WITHIN THE CITY
WHEREAS the City of Gridley (“City”) is a general law city organized and existing under the laws of the State of California; and
WHEREAS Gridley Municipal Code (“GMC”) §15.06.010 expressly authorizes the City to adopt public works construction standards by resolution and, from time to time, to amend, correct, or repeal all or any part thereof by resolution; and
WHEREAS GMC §16.03.030 provides that the Department of Public Works Construction Standards shall guide the use of all land within the incorporated boundaries of the City, and that the size and design of lots, the nature of utilities, the design and improvement of streets, and the provisions for special facilities in any subdivision shall conform to the standards established thereunder; and
WHEREAS GMC §13.04.110 requires that minimum standards for the design and construction of sewers within the City shall be in accordance with the Gridley Public Works Construction Standards; and
WHEREAS GMC §13.12.040 requires that all work performed by others on the City water system be performed in accordance with the Gridley Public Works Construction Standards; and WHEREAS GMC §12.08.030 requires that all work performed under an encroachment permit shall be in accordance with the Gridley Public Works Construction Standards; and WHEREAS GMC §16.24.010 requires that public improvements shall be installed in accordance with the Public Works Construction Standards; and
WHEREAS the City periodically reviews and updates these standards to reflect current engineering practices, regulatory requirements, accessibility standards, and construction methods; and
WHEREAS City staff and the City Engineer have completed a comprehensive review and update of the City of Gridley Standard Details and Specifications, now titled the 2026 City of Gridley Public Works Construction Standards (“2026 Standards”), to improve consistency, efficiency, safety, accessibility, and long-term maintainability of public infrastructure improvements; and WHEREAS the 2026 Standards address streets and right-of-way, subdivision improvements, domestic water systems, sanitary sewer systems, stormwater and drainage, grading, electrical systems, and related infrastructure, and represent the current technical requirements of the City for all public works design and construction; and
WHEREAS adoption of the 2026 Standards by resolution is consistent with the authority granted under GMC §15.06.010 and does not constitute a project under the California Environmental Quality Act (“CEQA”) pursuant to CEQA Guidelines §15061(b)(3), as adoption of organizational and procedural standards has no possibility of causing a significant effect on the environment; and
WHEREAS, the City Council finds that adoption of the updated standards is in the best interest of the City, is consistent with the Gridley General Plan, and will promote orderly development and construction of public improvements.
NOW THEREFORE, BE IT RESOLVED BY THE CITY OF GRIDLEY, CA, THAT:
• The 2026 City of Gridley Public Works Construction Standards, prepared by the Department of Public Works and dated May 13, 2026, are hereby approved and adopted as the official Public Works Construction Standards of the City of Gridley, effective immediately upon adoption of this Resolution. • The adopted Standards shall apply to all applicable City capital improvement projects and private development projects requiring public infrastructure improvements within the City of Gridley, unless otherwise approved by the City Engineer. • The City Engineer is authorized to administer, interpret, and implement the adopted Standards and to approve minor administrative revisions as necessary to maintain consistency with applicable regulations and engineering practices. • Supersession of conflicting provisions. To the extent any provision of the Gridley Municipal Code conflicts with, or establishes different requirements than, the 2026 Standards with respect to public works design, construction, materials, dimensions, or improvement requirements, the 2026 Standards shall govern and control as the authoritative Public Works Construction Standards of the City, pursuant to GMC §§15.06.010 and 16.03.030. Without limiting the foregoing, and pending amendment of the Municipal Code, the 2026 Standards shall control over the street right-of-way width classifications set forth in the table in GMC §16.21.040(B). • Conforming ordinance amendments. The City Attorney and the Director of Public Works are directed to prepare and present to the City Council, within 120 days of the adoption of this Resolution, an ordinance amending the Gridley Municipal Code to conform its text to the 2026 Standards, including without limitation amendments to GMC §§15.04.200 and 16.21.040(B).
• A copy of the 2026 Standards shall be maintained on file in the office of the City Clerk and the Department of Public Works and shall be available for public inspection during normal business hours.
• All prior conflicting standard details and specifications are hereby superseded upon the effective date of this Resolution.
• This Resolution shall take effect immediately upon adoption.
I HEREBY CERTIFY that the foregoing resolution was duly passed and adopted by the City Council of the City of Gridley at a regular meeting thereof, held on the 15th day of June, 2026, by the following vote:
AYES: COUNCIL MEMBERS
NOES: COUNCIL MEMBERS
ABSENT: COUNCIL MEMBERS
ABSTAIN: COUNCIL MEMBERS
ATTEST: APPROVE:
______________________ _______________________
Elisa Arteaga, City Clerk Michael W. Farr, Mayor
City of Gridley
Public Works Construction Standards Section 1
1-1
Purpose and Definitions
1.1 Purpose
The purpose of these Construction Standards is to provide direction in the application of public and private improvements and to establish minimum standards for the design, construction, inspection, and acceptance of improvements within the City of Gridley. These standards apply to improvements which are to be dedicated to the public and accepted by the City for ownership, operation, or maintenance, as well as certain private improvements constructed within existing or future public right of way or easements.
These standards are intended to promote coordinated development, protect public health and safety, and ensure that improvements are designed and constructed in a manner consistent with the physical conditions, infrastructure needs, and long-term maintenance responsibilities of the City of Gridley.
The following physical characteristics of the City of Gridley require special design and construction consideration:
1. Flat grades
2. High groundwater table year round
3. Unstable soils below the groundwater table
4. Storm Drain outlet restrictions from agricultural drainage channels The City of Gridley’s Public Works department is particularly concerned about:
1. Accurate establishment of grades
2. Watertightness of pipelines and structures
3. Adequate construction and safety procedures regarding shoring, bracing and dewatering of all excavations
4. Building pad elevations established above potential high water elevations, with adequate lot grading to the back of sidewalk
5. Storm Drain detention facilities designed to limit peak flows
6. Drinking water system back flow prevention and cross connection controls
1.2 Definitions
Applicant – Shall mean the Developer or the Engineer of record acting on behalf of the Developer Engineer of record.
Approved Plans – Shall mean all plans prepared for construction of improvements, reviewed, approved and signed by the necessary departments within the City of Gridley.
City – Shall mean the City of Gridley and its applicable departments.
City Engineer – Shall mean the City Engineer, Public Works Director, or their authorized designee acting on behalf of the City of Gridley.
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Engineer of record – Shall mean any person or persons, firm, partnerships, or corporation legally authorized to practice civil, mechanical, geotechnical, electrical engineering or other engineering disciplines in the State of California who prepares or submits improvement plans and specification to the City of Gridley for approval.
Contractor – Shall mean any person, persons, firm, partnerships, or corporation or combination thereof, licensed to perform the type of work involved, who has entered into a contract with any person, corporation or company, their legal representatives for the construction of any improvements, or portion of improvements with the City of Gridley.
Developer – Shall mean any persons, firm partnership, corporation or combination thereof, financially responsible for the work involved.
Development – Shall mean the act or process of any construction on properties as well as subdivision improvement.
Fire Department – Shall mean the Fire Department of the City of Gridley.
Fire Flow – Shall mean the required flow rate of a water supply, measured at 20 pounds per square inch residual pressure that is available for firefighting.
Geotechnical Engineer – Shall mean a professional engineer, licensed by the State of California to practice soils engineering.
Improvements – Shall mean streets, alleys, sidewalks, curbs, gutters, driveways, water mains, sanitary sewer facilities, storm drainage facilities, detention basins, canals, street lighting, public utilities, landscaping, irrigation, parks, fences, walls, and other facilities to be constructed or installed by the Developer within an existing or future public right of way or easement, or any improvement subject to City plan review or inspection.
Laboratory – Shall mean any testing agency or testing firm which has been approved by the Department of Public Works.
California MUTCD – Shall mean the “California Manual on Uniform Traffic Control Devices” as adopted by the California Department of Transportation, latest edition.
Relative Compaction – Shall mean the degree of compaction of soil expressed as a percentage of the maximum dry density determined in accordance with ASTM D1557, latest edition, unless otherwise approved by the City Engineer.
Soils Report – Shall mean a report as prepared by any person or persons, firm, partnership, or corporation legally licensed to prepare “Soils Reports” in the State of California.
Standard Details – Shall mean the standard details as set forth in the Standard Specifications and Details approved by the City Engineer and as amended.
Standard Specifications – Also referred to in this document as Standards.
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1.3 Design and Construction Practices
Any items or situations not included in these standard specifications shall be designed and constructed in accordance with accepted engineering practice, the State of California “Highway Design Manual”, the State of California Standard Plans, the State of California Standard Specifications, the “California Manual on Uniform Traffic Control Devices”, the State of California Department of Transportation Standard Specifications and Plans, and as specified by the City Engineer.
Any questions regarding the Standards shall be directed to Public Works, the City Engineer, or the Public Works Director.
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General Requirements
2.1 Plans by an Appropriate Engineer
All plans and specifications for improvements, private and public, which are to be accepted for maintenance by the City, and plans and specifications for private on-site drainage, sewer, water, and grading, shall be prepared by an engineer licensed in the State of California, of the appropriate branch of engineering covering the work submitted.
Plans shall include the items outlined in Section 3 – Plan Sheet Requirements.
2.2 Accepted Plans
Complete plans and specifications for all proposed streets, street names, bikeways, grading, drainage facilities, sewerage, water distribution systems, industrial developments, commercial developments, and subdivisions, including any necessary dedications, easements, and right of entry, shall be electronically submitted to the City for approval. The approval shall be substantiated by the signature of the required City representatives and issuance of a permit and to the beginning of construction of any such improvements. The City Engineer shall order any contractor to cease work on any project if said contractor does not have properly approved plans in possession.
2.3 Work in City Right of Way and Easements
No work shall be done within the City right of way and easements without approved plans and/or encroachment permits issued by the City. All necessary bonds and insurances shall be approved prior to the approval of the plans or issuance of an encroachment permit. Any construction that impacts traffic shall require a Construction Area Traffic Control Device Plan per the most current version of the (CAMUTCD) developed by a licensed traffic control engineer and approved by the City Engineer.
2.4 Submission of Improvement Plans
The following are the procedures and requirements when submitting Improvement Plans to the City of Gridley for Review. Incomplete submittals will not be accepted.
Improvement plans will be accepted only after the following conditions are met:
Development Projects
The projects which have been approved by the City, and are not proceeding under appeal or normal process to the City Council, may be submitted after the City approves the project and the Conditions of Approval are available from the Planning Division.
Subdivision
Rough Grading or improvements plans including parcel or subdivision maps may be submitted upon approval of the tentative map by the City and after the Conditions of Approval are available. The submittal package shall be electronically submitted as a whole directly to the City, at: [email protected].
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2.5 Submission of Site Development, Grading, and Improvement Plans Plans shall be submitted to the City Engineer at the time the application is made for a construction permit. Submit the application packet electronically to the City Engineer and City Planning by emailing all required files and a completed application summary form, including the following checklist.
Each Submittal shall include the following:
□ One (1) copy of the Soils Report.
□ An itemized Engineer’s cost estimate for all improvements to be constructed within public right of way or easements, or any other improvements for which the City provides plan check and inspection services. All cost estimates shall include a 10% contingency. The cost estimate shall also include all public landscaping improvements. □ Payment of plan check and inspection fee deposit shall be submitted with the submission of plans. Fees are based on the Cities most current master fee schedule. □ One (1) copy of the Drainage Report indicating the method of calculation, the Stormwater Quality Design and Maintenance Plan, site water shed map, and the 10- and 100-year storm drainage calculations based on Butte County’s Storm Drain Program and these specifications.
□ An electronic copy of the Clerk’s notice of approval for the Use permit and list of the Conditions of Approval.
□ An electronic copy of the approved tentative map and or site plan. □ For projects with a total disturbed area of less than 1 acre; submit an erosion and sedimentation control plan in accordance with these specifications and details. □ For projects with a total disturbed area equal to or greater than 1 acre; submit the State WDID associated with the project’s Storm Water Pollution Prevention Plan (SWPPP). Ensure the WDID status is active and accessible within the State Water Resources Control Board’s SMARTS system. A Copy of the SWPPP or WQCP shall be provided to the City. □ An electronic AutoCAD file of the project improvements. The initial submittal of the AutoCAD file will occur during the 2nd Plan check submittal. The file will be reviewed for content and format. Each subsequent submittal shall include and updated AutoCAD file for review. The final plan submittal of the AutoCAD file will occur after the final plan check, prior to the City signing off the approved plans. Failure to submit the AutoCAD file may delay final plan approval.
For tenant improvement projects, plans shall be routed through the City. Any improvements within right of way, easements, or any construction that would require temporary placement of equipment or material within the public right of way or easements shall require the Developer or the Contractor to obtain an encroachment permit from the City.
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2.6 Submission of Final and Parcel Maps
Final and parcel maps may be submitted for review upon the approval of the tentative map by the City. The following are the requirements:
□ An electronic copy of the final or parcel map
□ Payment of map checking fees
□ Boundary, Centerline, and parcel survey closure calculations that include error of closure □ Preliminary Title Report dated within six months.
□ One (1) AutoCAD file of the parcel or final map submitted. □ Any additional information/documentation as required.
2.7 Resubmittal Requirements
All resubmittals shall be electronically delivered to the City. The subject line of the email containing the resubmittal shall read, “City of Gridley –[Resubmittal #] [Project Name.]” All resubmittals shall include the following:
Response to Comment Matrix
All comments shall be populated into an excel spreadsheet and each comment shall be assigned a numbered. All comments shall be addressed within the excel sheet along with acknowledgement of the correction, or if a comment is not specifically addressed on the plans, a written explanation shall be provided stating why the comment was not addressed.
Plans and other Documentation
An electronic copy of the latest plan submittal in .pdf format, an AutoCAD file of the project improvements, and any additional documentation or materials as requested by the Plan checker.
Any additional changes or revisions made to the plans other than those required by the City shall require the Applicant to bring those revisions or alterations to the attention of the City.
Failure to do so may result in delays. Any additional review past the second plan check, or due to incomplete submittals, changes, and revisions will incur additional department review fees.
2.8 Plan Acceptance and Expiration
Acceptance for construction will be given to the plan set after all necessary changes, corrections, or additions have been made as required by the City, the Owner/Developer has paid the remainder of the total plan check and inspection fees and posted all required bonds and insurances, and a permit has been issued.
The Engineer of record shall deliver to the City a minimum of three (3) sets of 24x36 prints from the accepted plan file for permit issuance prior to scheduling a pre-construction meeting.
No plans will be considered approved, nor will construction be authorized until the plan set has received the appropriate permit.
Permits issued become null and void if the construction of work authorized by the permit is not commenced within six (6) months from the date of such permit, or if the construction of work authorized is suspended or abandoned for a period of six (6) months at any time after the work City of Gridley
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is commenced. At such time, the plans shall be subject to review by the City to determine conformance with current City standards.
Plan reviews that remain inactive for six (6) months may be deemed expired by the City. The project may, at the discretion of the City Engineer be granted a six (6) month extension or deemed expired. A maximum of one (1) extension may be granted.
2.9 Improvement Plan Revisions and Submittals During Construction Should changes occur during construction; such changes shall be subject to the approval of the City. To receive approval the engineer of record shall provide an electronic copy of the proposed changes with clouded notation or denoted by delta revision symbols. Following review and approval of proposed change, the proposed and stamped changes shall be distributed to the Owner and Contractor.
When construction is completed within the Right of Way for utilities and or streets that the City will be responsible for ownership and maintenance, the design or engineer of record shall forward all approved submittals to the City Engineer to keep for record. If the City Engineer determines that the Engineer of Record approved a submittal for a material that is not acceptable according to the City standards, the City Engineer holds the right to refuse the submittal. These submittals shall be sent over to the City Engineer in a timely manner, to prevent the installation of inappropriate materials. The City Engineer reserves the right to review said submittals for 7 working days..
2.10 Record (As-Built) Plans
The Contractor/Developer shall keep an accurate record of all approved deviations from the plans and shall provide a .pdf electronic file, AutoCAD electronic file, full size, and 11x17 bond copies of the as-built plans prior to final acceptance of the completed improvements. Each sheet of the plans shall be marked “As-Built” or “Record Drawing.”
2.11 Inspections
Requests for inspections shall be given a minimum 48 hours in advance. Any improvement constructed without inspection as provided above or constructed contrary to the order or instruction of the City Engineer will be deemed as not complying with the City standards and specifications.
Upon completion of any improvements and prior to requesting final inspection, the area shall be thoroughly cleaned of all rubbish, excess material and equipment and all portions of the work shall be left in a neat and orderly condition satisfactory by the City Engineer.
The Contractor will be notified in writing as to any particular defects or deficiencies to be remedied. The Contractor shall proceed to correct all defects of deficiencies as soon as possible, and a second inspection shall be made for final acceptance.
2.12 Submittal of Lot Line Adjustments
The following shall be submitted to the City prior to recordation of a lot line adjustment:
□ An electronic copy of the property boundary description with an exhibit map. These sheets must have at least ½” inch of margin along all sides to meet conditions of the County Recorder’s Office.
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□ One (1) AutoCAD file of the property boundary description. □ An electronic copy of the boundary survey closure calculations for the resulting lots. These items shall be stamped and signed by a California Licensed Land Surveyor or Registered Civil Engineer authorized to practice Land Surveying.
□ Deeds to convey interest in the affected properties.
□ Preliminary title report no older than six (6) months for all properties involved. One (1) copy of the Conditions Approval.
□ Signed Owner Consent.
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Plan Sheet Requirements
3.1 General
Public Improvement Plans shall be prepared for public improvements required of subdivisions and all other work performed within City right of way or easements that is in excess of minor work. For the purposes of this section, minor work shall consist generally of the construction, or the removal and replacement of curbs, gutters, sidewalks, driveways, minor street widening, connecting to existing water, sewer or storm drainage facilities adjacent to site development and utility rated work.
Public improvement plans shall be prepared in accordance with the following formatting standards.
3.2 Plan and Profile Sheets
All improvement plans shall be clearly and legibly drawn in ink on 24 inch x 36 inch Arch D or 22 inch x 34 inch ANSI D size paper. Sheets shall have 1 1/2 inch wide clear margin at the left edge with a 1 inch wide margin on all other edges, or as otherwise approved by the City Engineer.
Drafting Standards.
All linework shall be neat, clearly legible, and opaque to light. Letters and numerals shall have a minimum height of 1/8 inch and be well formed and sharp. Numerals showing profile elevations shall not be bisected by station grid lines. Dimension lines shall be terminated by a sharp solid arrowhead.
Scale
Horizontal scale shall be 1 inch = 20, 40 or 50 feet and shown as a scale bar beneath the north arrow. Vertical scale shall be 1 inch= 2, 4, or 5 feet.
Title Block
A title block must be shown on each sheet within the set of drawings and shall show the subdivision or project name, sheet title, sheet number, date, scale and Engineer of Record’s name, signature and license number. The title block shall be placed along the lower edge or right edge of the sheet.
Orientation
All plan sets shall be oriented with the North arrow pointing either to the top or right edge of the plan sheet.
3.3 Title or General Information Sheet
Each set of Improvement Plans shall have a Title or General Information Sheet. This sheet shall be sheet 1 of the plans and shall include the following:
□ A vicinity map drawn to a convenient scale, preferably not less than 1 inch = 2000 feet. The North arrow must point to the top of the sheet*
□ A North arrow and scale*
□ Sewer or storm drainage network*
□ Index of sheets*
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□ A signature block for the City Engineer*
□ Utility information block*
□ Block for City Project Number and Date Improvements Completed* □ The entire subdivision or parcel drawn to a scale of not less than 1 inch= 200 feet, or as approved by the City Engineer. The map shall provide the following:
o Streets and street names of all streets within or contiguous to the project o Adjacent subdivisions or parcels properly identified include names, lot lines and lot numbers.
o All property lines
o City limit line
□ Legend of symbols
□ The most current version of the City General Notes (Attachment A) □ Typical street sections including TI and R values
□ Temporary and permanent benchmarks with description, the engineer of record shall contact the City for the location and elevation of the nearest official benchmark. Datum information.* □ Any California Environmental Quality Act (CEQA) Mitigation measures that apply to the project. □ Approval from other jurisdictions with signatory boxes, such as Caltrans, Reclamation Districts, etc.
Improvement plans consisting of fewer than 4 sheets shall not include a title sheet but instead show all of the above information on the plans. If a title sheet is not required those items shown with an (*) shall be shown on the first sheet.
3.4 Street Plan and Profile Sheets
The following requirements are for all plans submitted to the City for review and approval.
Plan View
The plan view of each street to be improved shall be shown on separate sheets and shall include existing improvements and contours/elevations within 100 feet of the project boundary, proposed improvements and future improvements, if known. Proposed improvements shall include sidewalks, curbs, gutter, driveways, sewer mains, water mains, sewer lateral locations, storm drains, manholes, valves, fire hydrants, fencing, barricades, monuments, survey stationing, signal pull boxes, signal poles, hardscape features, curve data for all curves along centerline and curb returns and distinct elevations along the face of the curb at all beginning and ends of curves and at all curb returns.
In addition, right of way lines, easement lines, and City limit lines (if applicable) shall be shown. Call outs on the plans to City Standards shall reference the Drawings where these are shown. Callouts for non-standard improvements shall reference the details, including sheet number, which provides the construction specifics. Other data may be required as specified by the City Engineer.
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The survey stationing shall normally read from left to right with the North arrow pointing either to the top or right edge of the sheet. All stationing shall be a continuation of that used for the design for existing improvements where possible.
Profile View
The profile view of each street shall be shown immediately below its plan view. The profile shall include existing and proposed street centerlines, sewer mains, storm drains, water mains, public utility mains, all utility crossings and gutter flow lines. Distinct elevation shall be shown on the street centerline and gutter flow line at 50-foot stations and grade break points, manhole and catch basin inverts and elevations and water main crossing with other utilities. Rates of grade shall be shown on all profile lines. Elevations of hydraulic grade line for the 10 year frequency storm shall be shown at all storm drain manholes, catch basins and drain inlets where located above the top of the pipe. Elevations of the hydraulic grade line for 100 year frequency storms shall be shown at all crossings of arterials, culverts and where determined necessary by the City Engineer. Storm drain manhole and inlet identification numbers from drainage study shall be shown at all storm drain manhole and inlet locations.
Signing and Striping Plans
All existing and proposed traffic signing and striping shall be shown on a plan view and on separate sheets from all other improvements. The scale shall be 1 inch = 40 feet, or as otherwise approved by the City Engineer. Signing and striping to be shown shall include all existing and proposed traffic striping, pavement markings, pavement markers, regulatory signs and warning signs. All existing signing and striping within at least 200 feet of the project limits shall be shown.
Rough Grading and Finished Grading Plans
Rough grading and finished grading plans shall conform to these standards.
Other Plans
Other Plans shall be incorporated in the public Improvement plans include, but are not limited to, landscaping and irrigation, dry utilities, retaining and decorative soundwalls, and traffic signals.
The layout of meandering sidewalks, soundwalls, pedestrian pass-throughs, etc shall be shown on the improvement plans along with any grading associated with these improvements, in addition to being shown on the landscaping plans. Public Improvements built under the landscaping plans shall be included in the cost estimate submitted with the improvement plans in order that they may be properly bonded for and inspections costs covered.
3.5 Detail Sheets
Detail sheets, if necessary, shall delineate special details, structural designs, etc., for which no standard detail exists, and when space is not available on the plan and profile sheets.
Plan views of the structure, for which details or designs are to be provided, shall be shown on the detail sheet depicting the location of said structure in relation to street centerlines, stations, bearings, shews, grades, etc.. Structural details shall be delineated at a scale that will clearly define all facets of the design. Standard Details shall not be delineated on details sheets or any other sheet unless reproduced in full.
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3.6 Parcel and Final Maps
The parcel or final map shall be prepared by or under the direction of a Civil Engineer registered in the State of California authorized to practice Land Surveying or a licensed land surveyor in the manner required by the State Subdivision Map Act, and these standards.
Preparation and Form
The general form and layout of the map, including size and type of lettering, drafting and location acknowledgements, etc. shall be as approved by the City Engineer. Parcel and final maps shall conform to the following:
□ Survey information shall generally read from left to right and orientated perpendicular or parallel with the northernly direction. North shall be oriented to either top of right edge of the sheet.
□ Large lot final maps or large lot parcel maps shall not be more than 1 inch = 100 feet, unless otherwise permitted by the City Engineer. The scale of residential final maps shall not be more than 1 inch = 50 feet. All maps shall clearly show all details of the subdivision. □ All dimensions shall be shown in feet and hundredths of a foot. No ditto marks shall be used.
□ If more than 2 sheets are necessary to show the entire subdivision, a graphical index shall be included.
□ The subdivision designation, tract number, other numbers assigned by the City Engineer, scale and North arrow shall be shown on each sheet.
□ A title sheet, designated as page number 1 of the final map, shall be provided. Where the size of the subdivision permits, in lieu of a separate title sheet, the information required may be shown on the same sheet as the map of the subdivision.
Certificate Sheet
The certificate sheet shall contain the following information:
□ The title followed by the words “Subdivision No (Insert Planning Department filing number).” “City of Gridley, Butte County, California.”
□ Below the title shall be a subtitle, consisting of a description of all property being subdivided with reference to such map or maps of property shown thereon and shall have been last previously recorded or filed in the County Recorder’s Office, or shall have been previously filed with the County Clerk pursuant to a final judgement in any action in partition, or shall have been previously filed in the office of the County Recorder under authority of the Subdivision Map Act of be reference to the plat of any United States survey.
The title shall also include the applicable Township and Range of Mount Diablo Meridian. □ The subtitle of maps filed for the purpose of reverting subdivided land to acreage shall consist of the works “A reversion to acreage of…” (insert description as required herein).
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□ Reference to tracts and subdivisions in the description must be worded identically with original records. Reference to book and page of record must be complete. □ Affidavits, certificates, acknowledgements, endorsements, acceptances, dedications and notarial seals as required by law including but not limited to the Subdivision Map Act and City ordinances.
Information
The parcel or final map shall substantially conform to the City approved or conditionally approved tentative map including all approved modifications, and shall contain the following information:
□ All areas shown on the map which do not constitute a part of the subdivision shall be labeled “Not a part of the subdivision” or “N.A.P.O.T.S.” All lines delineating such areas shall be dashed.
□ The following survey data and information shall be shown on the final map:
1. Corner Stakes, monuments (together with their precise position) or other evidence found on the ground, to determine boundary of the subdivision.
2. Corners of all adjoining propertied identified by lot and block numbers, subdivision names, numbers and pages of record, or by section, township and range or other proper designation.
3. All information and data necessary to locate and retrace any point or line without reasonable difficulty.
4. The location and description of any required monuments to be set after recording of the parcel map, and the statement that they are “to be set.”
5. Bearings and lengths of each lot line, centerline, block line and boundary line and each required bearing and distance. All line annotations hall be located adjacent to the described line. Curve and line tables can be used to avoid crowding and conflicts with line work or other information shown on the maps.; however, the use of annotation tables shall be kept to a minimum and located on the same sheet as the line work.
6. Details shall be located on the same sheet as the line work being depicted in the detail.
7. Chord length, chord bearing, radius, arc length and central angle of each curve.
8. The survey center lines of any street or alley in or adjacent to the parcel together with reference to a field book or map showing such center line and the monuments which determine its position. If the monuments are determined by ties that fact shall be so stated.
9. Sheet numbering shall be located in the lower right hand corner of each sheet.
10. Such other survey data or information as may be required to be shown by the City. □ All resulting lots or parcels being subdivided for the purpose of sale, lease, or financing excluding those exempt by law, and all parcels offered for dedication to the City or any City of Gridley
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other public agency, for any purpose with all dimensions, boundaries, and courses clearly shown and defined. Dimensions of lots shall be as total dimensions corner-to-corner, in addition to point-to-point dimension.
□ All lots shall be numbered consecutively, without omissions or duplication, throughout the subdivision, starting with the number 1, except units of a total development. Lot numbering shall be consistent with that of the approve or conditionally approved tentative map or as approved by the City Engineer. Only parcels offered for dedication other than for streets or easements shall be designated by letters. However, in single-family divisions, the parcels intended for other than single-family use may be designated by letters. Each numbered lot shall be shown entirely on one sheet. The text height of a lot number or designated letter lot shall be a minimum of 1.5 times larger than the surrounding line annotation.
□ The square footage (to the nearest foot) shall be shown on the map directly under the lot number. Lots one acre or greater shall be shown with the net acreage (to the nearest one hundredth of an acre).
□ The location and total width of all public streets, alleys, pedestrian ways, equestrian and hiking trails and biking paths, and rail road right of way; the names of public streets, and the width on each side of the centerline of each public street; the width of the portion of the street, alley, pedestrian way, equestrian and hiking trail and bike path being dedicated , and the width of the existing dedication, public or private if any within the subdivision. □ All necessary data, including widths and sidelines of all proposed and existing public utility easements to which the lots of the subdivision are subject. Each easement shall be clearly labeled as to nature and purpose and if already of record, its recorded reference given. If an easement of record cannot not be plotted on the map because its location is not defined or definite, an attempt shall be made to have the easement extinguished and removed from the title. Easement shall be denoted by fine dashed lines. □ All limitations on rights of access to and from streets and lots and other parcels of land shall be shown on the map.
□ The lines of any natural watercourse, channel, stream, creek or body water in or adjacent to the subdivision and/or officially adopted floodplain lines, which constitute parcel boundary lines or easement lines shall be shown on the map. □ Any City boundary crossing or adjoining subdivision clearly designated and tied in shall be shown on the map.
□ The bases of bearings used in the field survey shall be shown, with reference to a recorded subdivision map or other source acceptable to the City Engineer.
Additional Data Required
The following statements, documents and other data, and as many additional copies thereof as may be required shall be filed with the parcel or final map:
□ On the application form, the names, addresses, and telephone numbers of the record owners and subdivider and persons preparing the Parcel or Final Map.
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□ A guarantee of title or letter from a title company, certifying that the signatures of all persons whose onset is necessary to pass a clear title to the land being subdivided and all acknowledgements thereto, appear and are correctly shown on the proper certificates, and are correctly shown on the final map; both as to consents for the making thereof and the affidavit of dedication.
□ A traverse computations sheet in a computerized form approved by the City Engineer; giving bearings, distances and coordinates and showing the mathematical closure. No manual computations will be accepted. All lots must close to within 0.02 feet or as specified by the City Engineer. Each sheet of survey closures shall be numbered sequentially.
□ All protective covenants, restrictions, or affirmative action obligations in the form in which the same are to be recorded when approval thereof by an officer of the City has been required as a condition of approval of the Tentative Map. □ All other data required by law as a conditional approval of the Tentative Map, including plans, reports, agreements, permits, fees security or other requirements.
Subdivision Agreement
If the requirement improvements for the subdivision have not been completed to the satisfaction of the City Engineer and Accepted by the City council prior to recording of the Parcel map or Final map, the subdivider shall enter into a subdivision agreement with the City the form of the agreement shall be as approved by the City Attorney, and said agreement shall be approved by the City council and recorded concurrent with the parcel or Final map.
3.7 Property of the City of Gridley
All plans, maps, reports and any other items submitted to the City shall become property of the City.
The City shall not be responsible for the return of these items once they are submitted.
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Contractor’s and Developer’s Responsibilities
4.1 General
All improvements within City’s right of way, and easements, and onsite private drainage improvements shall be installed in accordance with the approval improvement plans and specifications, the City of Gridley Standards, and the State of California Department of Transportation Standard Specifications, hereinafter referred to as the Caltrans Standard Specifications.
The public roadway infrastructure improvements shall be designed and constructed in accordance with these Design and Construction Standards and the latest edition of the City’s American Disabilities Act (ADA) Transitions Plan. Should there be any discrepancy between these Standards and the ADA Transition Plan with respect to accessibility, the ADA Transition Plan shall have precedence. Caltrans Standard Specifications shall apply where not superseded by these Construction Standards. The Contractor shall follow all applicable City, County, State and Federal laws and regulations relating to construction on the improvements.
4.2 Contractor’s Responsibility
It shall be the Contractor’s responsibility for:
Plans
Perform construction per plans signed and approved by the City. Any additions, deletions or changes to the approved plans shall be submitted to their departments for review and approval prior to construction.
Notification
The Contractor shall schedule a preconstruction meeting with the City to review and inspect the improvements. The meeting shall take place a minimum of 48 hours prior to the start of construction. The preconstruction meeting shall not be scheduled prior to the City departments’ receipt of approved plans.
Minimum advance notice to the City’s Construction Inspector for inspection shall be 48 hours. The City’s Construction Inspector shall have the opportunity to inspect all underground/subsurface improvements prior to backfill or cover. The scope of various inspection parameters and participation of contracted special inspection duties shall be identified at this time.
The developer/contractor is responsible for completing the project per the approved plans and specifications. Once deemed complete at the discretion of the City Inspector, it shall be the developer’s responsibility to notify the City Inspector to commence City procedures to establish a project punch list prior to City acceptance.
USA Markings
White paint shall be used to indicate areas to be marked by Underground Service Alert (U.S.A.). Any areas not marked shall not be included in the U.S.A. and the Contractor shall not excavate in these areas. The Contractor will be responsible for any damage resulting from excavation in unmarked areas. The Contractor or Applicant who requested the USA markings shall be responsible for the removal of the USA markings upon completion of the work, at the discretion of the City Engineer.
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The Contractor shall take routine precautions to ascertain the location of any underground utilities in the vicinity of their project prior to U.S.A. marking. Contractor shall notify the City’s Construction Inspector when any system is affected.
Testing
Constructed utilities shall be tested in accordance with these standards. All testing results shall be provided to the Construction Inspector within 5 working days after the Contractor has received the results.
Cultural Resources
The Contractor shall stop construction if cultural resources are discovered during excavation operations. It is possible that previous activities have obscured surface evidence of cultural resources.
If signs of an archeological site, such as any unusual amounts of stone, bone, or shell are uncovered during grading or other construction activities, work shall be halted within 100 feet of the find and the City, as well as the Butte County Tribal Historic Preservation Office shall be notified immediately. A qualified archaeologist shall be consulted for an on-site evaluation. Additional mitigation may be required by the archaeologist.
Hazardous or Toxic Materials and Contaminated Soils
Should the Contractor encounter hazardous or toxic materials, or contaminated soils, or materials which the Contractor believes may be hazardous waste during any and all excavation or grading operations, as defined in Section 25117 of the Health and Safety Code, which require them to be moved to a Class I, Class II or Class III disposal site in accordance with provisions of existing law, the City of Gridley Fire Department shall be contacted immediately. The area which contains the hazardous or toxic materials or contaminated soils shall be marked off until an investigation by a member of the Fire Department is conducted. The cost for remediation and/or removal of soil shall be bourn solely by the solely by the Contractor/Property owner. The parties intend that this provision be broadly construed.
Working Hours
In accordance with the City of Gridley’s noise ordinance (9.40.160), the hours of project construction shall be limited to the following:
6:00AM to 7:00PM, Monday through Saturday
There may be additional limitations placed on working hours specified in the project’s approved plans, conditions of approval, special provisions, or encroachment permit. Any requests for work outside of the hours listed above should be made in writing and will be considered by the City. Should a request be approved, the Contractor may be required to pay additional fees for City Inspection outside of normal business hours.
Emergency Contact Person
Prior to the commencement of project construction, the City’s Construction Inspector shall be furnished with the name and telephone number of a contact person who can be reached 24 hours per day regarding problems or emergencies at the site.
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Traffic Control
A traffic control plan (TCP) shall be submitted by the Contractor/Developer whenever required by the City. When the City’s Construction Inspector has determined a TCP is required, the Contractor shall submit the plan to the City for acceptance. The plan shall include: The project title, the encroachment permit number if applicable, the requested traffic alteration specifics and the requested working hours., The TCP shall be available at the site at all times during the work. The Contractor shall assure that the traffic control equipment is erected prior to the work beginning and that it is removed immediately when appropriate.
Preservation of Property
The Contractor shall take extreme care to protect existing site and adjacent improvements from damage.
The Contractor shall be responsible for any damage resulting from the construction and shall be responsible for repair or replacement conforming to the latest standards.
Personnel
Only personnel competent in the particular trade undertaken shall be employed for the construction work.
Weather
Construction work shall not commence or progress when the weather jeopardizes a safe working environment or the quality of the project in any manner. The contractor shall comply with the Storm Water Pollution Prevention plan on site.
Construction activities within or adjacent to the public right of way during inclement weather may be prohibited where the activity constitutes an unsafe condition for the public and/or the workers. This applies to the traveled way and any work area adjacent to the traveled way.
Trenching Safety
Prior to excavation of trenches 5 feet or deeper, the Contractor shall submit the following to the City’s Construction Inspector:
□ A copy of the company’s annual CALOSHA T-1 trenching permit. □ A copy of the company’s letter informing CALOSHA of the time the trenching is commencing and the location of the work prior to trenching within any City street right of way or easement, an encroachment permit shall be obtained from the City.
In unimproved areas, the maximum length of open trench (5 feet in depth or more) shall be that which can be trenched and backfilled in one day. Any trench left open overnight and the method of protection thereof shall be approved by the City’s Construction Inspector.
In existing streets, following trenching and pipe laying, backfill shall be accomplished immediately unless approved otherwise by the City’s Construction Inspector. No excavation which is larger than necessary to leave the end of the pipe exposed for the next work day shall remain open at the end of the day. The excavation shall be plated and/or fenced, subject to the approval of the City’s Construction Inspector.
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Street Cleaning
Where dirt, mud, rock, sand or other foreign material are tracked onto public street pavement, the Contractor shall clean the streets daily, or as directed by the City’s Construction Inspector. If the Contractor fails to keep the streets clean, the City may clean the areas and bill the Contractor. Streets shall be cleaned with a power broom or hand brooms and shall not be washed with water without the approval of the City’s Construction Inspector. Any mud displaced into the City storm drain system by the Contractor shall be removed at the discretion of the City’s Construction Inspector.
Construction Safety
Construction safety within the City shall be governed by the Construction Safety Orders of the Occupational Safety and Health Standards of Title 8 of the California Code of Regulations.
4.3 Developer’s Responsibility
It shall be the Developer’s responsibility to provide Record Drawings in PDF electronic format, two sets of blue line prints (1 full size, 1 scaled) and shall be submitted to the City.
4.4 Residential Occupancies During Residential Building Upon the occupancy of 1 or more homes in public or private subdivisions, the occupant (s) shall have a safe, clean, un-obstructed travel way, including sidewalks, in accessing and exiting the area of their home, applying to newly constructed streets within the subdivision extending to the closest existing street. The following minimum standards are to be met:
1. Streets shall be thoroughly cleaned, back of walk to back of walk at the end of each work day.
2. No building materials, portable toilets or construction equipment shall be stored within the street right of way. Portable toilets shall be a minimum of 50 feet from drain inlets.
3. A trailer with a valid California license may be parked along edges of the street within a subdivision for a period of 72 hours, provided the travel ways are unobstructed and each outside corner of the trailer has lighted barricades.
4. Erosion control materials at drain inlets such as straw bales and gravel bags shall be removed. Silt bags which are in drain inlets fronting homes with completed landscaping shall be removed.
5. Landscaping related materials (such as cobbles, bark or gravel) may be staged in the streets for immediate removal. If stored overnight, a lighted barricade shall be placed on each side of the pile, toward traffic. The pile shall not extend into the street from the curb further than the width of a parked car.
6. Unoccupied cul-de-sacs or other section of streets for which there is no public access necessary shall be barricaded.
4.5 Guarantee and Warranty
The Contractor shall guarantee and warrant all materials supplied as being fit for the purposes intended. The Contractor shall guarantee and warrant all work performed as having been accomplished in a proper and workman-like manner.
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Should any failure of work occur within the warranty period, the Contractor shall promptly make the needed repairs at the Contractor’s own expense. Should such failure of work result in excessive maintenance by the City, or in the opinion of the City, the failure is best left unrepaired, the Contractor shall incur the additional maintenance cost.
In emergency cases, where in the opinion of the City Engineer (provided a reasonable attempt has been made to notify the Contractor) delay would cause serious loss or damages, or a serious hazard to the public, the repairs may be made without prior notice to the Contractor, and the Contractor shall pay the entire cost thereof.
The procedures for review, repair and release of guarantee and warranty obligations shall be as follows:
Subdivision Improvements
The guarantee and warranty shall continue for a period of one year after Notice of Completion for all public improvement work installed under any Subdivision Agreement. The Subdivision Agreement shall be binding in its entirety.
The following procedures shall be followed for completion of the guarantee and warranty for subdivision improvement:
1. All necessary City departments shall complete their guarantee and warranty inspections during approximately the tenth month following the completion and prepare and deliver a final punch list to the Contractor by approximately the end of the tenth month.
2. Within 30 days of receipt of the final punch list (during the eleventh month), the Contractor shall repair or address all items indicated. All City departments issuing a punch list shall then be notified for re-inspection of repairs.
3. Within 30 days of notifying the Contractor (by the end of the eleventh month), the City departments shall re-inspect the repaired improvements.
4. Upon the City’s approval of the repairs, the maintenance bond will be allowed to expire, at the conclusion of one year following the Completion. If the Contractor does not complete the required work by the end of the eleventh month, the list of repairs will be referred to the City Attorney’s office for further management.
5. Any subdivision improvement work subject to the 1-year warranty shall require the issuance of an encroachment permit.
Underground Warranty Work within City Street Right-of-Way All underground work done as a result of the 1-year warranty inspection shall comply with the following:
1. All backfill in City streets shall be two sack, slurry cement.
2. The asphalt concrete patch shall conform to Construction Standard Detail ST-20.
3. Depending upon the extent of asphalt concrete patching necessary and at the discretion of the City’s Construction Inspector, a Caltrans Type II slurry seal or one inch asphalt concrete overlay of the entire street width in the area of the patches may be required.
4. Pavement cracking: Depending upon the extent of cracking and at the discretion of the City’s Construction Inspector, cracks shall be sealed per these Standards. Crack sealing shall be followed with a slurry seal or one inch asphalt concrete overlay which shall be City of Gridley
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applied to the entire street width in the area of the cracks as required by the City’s Construction Inspector.
City’s Policy on Warrant Repairs on Sewer Stub and Services Sewer Services to residential and commercial subdivision lots under warranty Where a project inspection identifies defects in a sewer service and the sewer main is still within the warrant period, the responsibility to repair the service rests solely on the developer who installed the sewer main.
Sewer services to residential and commercial subdivisions outside of warranty Where a project inspection identifies defects in a sewer service and the sewer main is no longer under warranty, the responsibility to repair the defects shall rest on both the developer and the City as follows:
1. The developer shall be responsible to repair defects found in any sewer service from the first joint downstream of the sewer cleanout to the commercial or residential building (that portion of the sewer services that is considered “private”).
2. The City shall be responsible to repair defects found in any sewer service from the first joint downstream of the sewer cleanout to the sewer mainline (that portion of the sewer service that is considered “public”.
Sewer stubs to residential and commercial subdivisions:
Where sewer stubs have been constructed on sewer mains, these sewer stubs become an integral part of the sewer system of the proposed residential or commercial subdivision they were designed and built to serve. The developer of the subdivisions shall be required to test and repair these stubs, if found damaged, prior to tie-ins. A note to this effect shall be placed on all Building and improvement plans to ensure the developer is aware of this requirement prior to initiating construction.
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Streets
5.1 General
Street surface improvements shall include barricades, bikeways, bridges, bollards, curb, curb & gutter, driveways, pavement, curb ramps, sidewalk, survey monuments and tunnels. These improvements shall be installed in accordance with the approved improvement plans, these Standards and the latest edition of The State of California Department of Transportation Standard Specifications hereinafter referred to as the Caltrans Standard Specifications latest edition and as specified by the City Engineer. No Street shall be cut, nor any public improvement disturbed until the Developer/Contractor has obtained an encroachment permit from, and/or entered into a subdivision agreement with the City.
5.2 Connection to Existing Improvements
Connection to existing surface improvements require that the following conditions be met:
Existing Stub Street Connection
The Developer shall be responsible for removing and reconstructing a portion of the existing roadway to make a satisfactory connection, as required by the City Engineer.
Street Widening
When widening to complete a partial street along a development project, the Developer shall be responsible for sawcutting and removing a narrow strip along the outside portion of the pavement to provide a clean and stable pavement section for constructing against. The width from centerline shall be shown on the approved plans or as determined in the field, and verified by the City Engineer. Following construction of the adjacent curb and gutter, paving shall not commence until the City’s Construction Inspector is satisfied that the cross grade between the existing pavement edge and the new gutter lip conforms to or approaches the City’s required 2% cross grade. 3% is the maximum cross grade allowed, unless shown on the approved plans.
Sawcutting
When sawcutting within the street for trenching or other purposes, the Contractors shall grind 1 1/2 inches of pavement between the lane lines (from lane stripe to lane stripe).
Upon completion of the sawcutting and/or trenching work, where the sawcutting occurs between the curb and gutter and nearest lane stripe (including bike lanes), the same 1 1/2 inch grind shall be required. Contractor shall place a Petromat fabric or approved equal by the City and overlay from lane stripe to lane stripe, or curb to lane stripe and restripe or replace any delineators removed during the grind.
5.3 Street Classes and Design Widths
For purposes of geometric and structural design of all new public streets, streets shall be classified according to the following requirements, and the appropriate Standard Drawings.
Under certain circumstances, particularly within the infill areas of the City where curb and gutter vary, changes to the standards can be made at the discretion of the City Engineer.
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Table 5-1 Street Classes and Design Widths
Street Type Right-of-Way
width* (in
feet)
No. of
Lanes
Lane
Width
Sidewalk Bike
Lane
Planter
Parkway
Strip
On
Street
Pkg.
Highway 99 Per Caltrans - - - - - -
Minor
Residential
50-62' 2 11.5' 5-6'
Both
Sides
No No 8'
Both
Sides
Collector 50-64' 2 12' 5-12'
Both
Sides
5'
Both
Sides
6'
Both
Sides
No
Minor
Arterial
60-84' 2 12' 5-12'
Both
Sides
6'
Both
Sides
6'
Both
Sides
8'
Both
Sides
Arterial 66-84' 2-4 11' 5-12'
Both
Sides
5'
Both
Sides
6'
Both
Sides
No
20-Foot Street (Alley)
A Street depressed in the center with a right-of-way and surface width of 20 feet. See Standard Drawing ST-11.
Residential Streets
Where residential streets serve Low Density Residential (LDR) and Medium Density Residential (MDR) subdivisions, and some High Density Residential (HDR) the following standards apply.
Minor Residential with Attached Sidewalks: A residential street servicing 100 or fewer lots shall be classified as a minor residential street. Minor residential streets shall have a right of way of 50 feet, and back or curb to back of curb width of 39 feet. See City Standard Drawing ST-01.
Collector/Industrial – Attached Sidewalks: A Street serving an industrial/commercial subdivision or a residential subdivision along which no home frontage is allowed shall be classified as a collector/industrial street. Collector/industrial streets with two drive lanes and one center turn lane shall have a right-of-way width of 62 feet, and back-of-curb to back-of- curb width of 51 feet. Collector/industrial streets with two drive lanes only shall have a right-of-way width of 50 feet, and back-of-curb to back-of- curb width of 39 feet.
Additional right-of-way and pavement shall be provided at intersections for deceleration lanes, bus turnouts, and turn lanes, as specified by the City Engineer. See City Standard Drawing ST-02. Detached sidewalk shall be approved by City Engineer.
Minor Arterial with On-Street Parking: Those roads specified in the City’s Capital Improvement Program as requiring a two-lane roadway shall be classified as minor arterials.
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Minor arterials shall have a right-of-way width of 80 feet and back-of-curb to back-of-curb width of 67 feet and shall provide a center 2-way left lane or raised landscape median as specified by the City Engineer. Additional right-of-way and/or pavement may be required for bus turnouts and at intersections and driveways for acceleration lanes, deceleration lanes, and multiple left turn lanes, as specified by the City Engineer. See City Standard Drawing ST03.
Arterial with No Parking: Those roads specified in the City’s Capital Improvement Program as requiring a four-lane roadway shall be classified as arterials. Arterial shall have a right-ofway width of 80 feet and back-of-curb to back-of-curb width of 69 feet and shall provide a center 2-way left lane or raised landscape median as specified by the City Engineer.
Additional right-of-way and/or pavement may be required for bus turnouts and at intersections and driveways for acceleration lanes, deceleration lanes, and multiple left turn lanes, as specified by the City Engineer. See City Standard Drawing ST-03.
Cul-de-Sac /Offset Cul-de-sac: The length of cul-de-sac streets as measured from the centerline of the intersecting street to the center of the bulb, shall not exceed 500 feet, without the approval of the City Engineer. In the case of stub streets associated with phased development, the combined street lengths as measured from the dead-end to the nearest through street shall be in accordance with the requirements for cul-de-sacs. Stub streets shall be terminated with a temporary bulb. See City Standard Drawing ST-04.
Standard Elbow: The standard elbow can be used on Industrial type streets with a radius of 60 feet. See City Standard Drawing ST-05.
5.4 Right-of-Way-Width
Right-of-way widths shall be in accordance with these standards for the street classification under consideration or as determined by the City Engineer. In no instance, without approval of the City Engineer, shall a street have a right-of-way width that is less than the street of which it is a continuation. Right-of-way requirements for widening at intersections shall be as specified by the City Engineer.
Building setbacks, landscaping requirements, and parking requirements shall be based on the ultimate right-of-way, regardless of the location of public street improvements.
A minimum 10-foot public utility easement (PUE) shall be dedicated adjacent to minor residential streets and arterials and shall include traffic control appurtenances. Additional easements for sewer, water, storm drainage, landscaping, fencing, and all other public utilities shall be provided as required by the utility companies, these Construction Standards, and as specified by the City Engineer.
A minimum 12.5-foot public utility easement (PUE) shall be dedicated adjacent to all collector/industrial streets and shall include traffic control appurtenances. Additional easements for sewer, water, storm drainage, landscaping, fencing, and all other public utilities shall be provided as required by the utility companies, these Construction Standards, and as specified by the City Engineer.
Along the frontage of collector and arterial roadways, the right-of-way dedication shall include the landscape corridor adjacent to parcels zoned single-family residential (SFR).
5.5 Roadway Signage and Striping
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Signing and striping shall conform to the latest edition of the California Manual of Uniform Traffic Control Devices, (CA MUTCD), unless modified by these standards, or in writing by the City Engineer.
5.6 Structural Section
All pavement sections shall be designed on the basis of the resistance R-value as determined in accordance with the State of California, Department of Transportation design method and appropriate traffic indices (TI). If the subgrade has an “R” value of 10 or less, a geotextile fabric or other approved product shall be installed on subgrade prior to placement of AB or ASB material. In addition, the City Engineer may require the installation of edge drains in soils where the “R” value of the subgrade is 10 or less. The Geotechnical Engineer may submit for treatment of the subgrade material, with lime or cement or other approved product if suitable soils exist.
This may be considered in lieu of geotextile fabric and base material with approval of the City Engineer. The resulting structural section shall be no less than City Standard Detail ST-12.
5.7 Curb and Gutter Requirements
Curb and/or gutter are required adjacent to all public and private streets. All sidewalk, curb and gutter shall be constructed of minor concrete conforming to the “Minor Concrete” section of the most recent Caltrans specifications. Curb and gutter transitions shall be according to City Standard Drawing ST-07.
Type A4 Rolled Curb and Gutter
Type A4 rolled curb and gutter shall only be installed in residential areas on local streets which do not have existing vertical curb and gutter. Installation of rolled curb and gutter on streets which have existing vertical curb and gutter will require approval from the City Engineer. See Standard Drawing ST-06.
Type A1 Vertical Curb
Type A1 vertical curb shall be installed where there is no existing gutter, or no proposed gutter due to extenuating design constraints. See Standard Drawing ST-06.
Type A2 Vertical Curb and Gutter
Type A2 vertical curb and gutter shall be installed adjacent to all multiple residential, industrial/commercial developments, school and park sites, poured monolithically with sidewalk or as specified by the City Engineer. See Standard Drawing ST-06.
Type A3 Vertical Curb
Type A3 vertical curb shall be installed when curb needs to be superimposed on existing pavement adjacent to all multiple residential, industrial/commercial developments, school and park sites, or as specified by the City Engineer. See Standard Drawing ST-06.
Valley Gutter
Valley Gutter may be used for alleys and parking lots. Valley Gutters shall not be used in either public or private streets. See Standard Drawing ST-09.
5.8 Sidewalk Requirements
Sidewalks shall be constructed adjacent to all public streets. All sidewalks shall be Minor Concrete as specified in “Minor Concrete” section of the most recent Caltrans specifications. All City of Gridley
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sidewalks shall have a minimum thickness of 6 inches on native soil, at 95% relative compaction, or 4 inches thick with 4 inches of AB at 95% relative compaction, and shall meet the following requirements:
Width
The required minimum width of sidewalks shall be as listed in Table 5-2. The width of the curb shall not be considered as included in the width of the sidewalk. The minimum sidewalk width is 4 feet.
Table 5-2 Sidewalk Width
Street Type Sidewalk Width (feet)
Minor Residential with Attached Sidewalk 5
Collector/Industrial with Attached/Detached Sidewalk 5
Minor Arterial with On-street Parking 6
Arterial with No Parking 5
Slopes
Gutter pan cross slope shall not exceed 5% maximum in front of a curb ramp access.
Sidewalks shall not exceed a maximum cross slope of 2% or a minimum of 1% unless otherwise approved by the City Engineer.
Curb Returns
Curb returns shall be constructed on a curve having a flowline radius equal to that shown in Table 5-3:
Table 5-3 Curb Returns
Street Type Minimum Curb Return Radius (feet)
All residential street intersections 30
Cul-de-sac 40
Arterial Streets 30
Collector/Industrial Streets 30
Pedestrian Curb Ramps
Pedestrian curb ramps shall be provided at all intersections and driveways with attached sidewalk. All curb ramps shall conform to the requirements of these standards and the most current Caltrans standards and accessibility standards. It is the design engineer’s responsibility to ensure that the intersection slopes designated on the improvement plans allow for the construction of pedestrian curb ramps that meet the above criteria.
At “T” intersection located at signalized intersections, ramps shall be constructed in the appropriate position on the side of the through street, directly opposite the ramps at the curb return of the “T” intersecting street. Such ramps are not required on the side of the through street on residential streets unless the distance to the next available street crossing is greater than 500 feet.
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5.9 Roadway Profile Standards
The following standards shall apply to the design of roadway profiles.
Grades
The minimum centerline (longitudinal) grades on new streets and gutter flow lines shall be
0.25%. The minimum grade of gutter sections constructed along existing streets shall be
0.20%. The maximum street slope shall be per Table 5-4:
Table 5-4 Grades
Street Type Maximum Grade
Arterial Streets 8%
Collector Streets 10%
Minor Streets 15%
Cross Slopes
Standard cross slopes shall be 2.0% on all roadways. Certain roadways may require super elevations as directed by the City Engineer. Cross slopes on widened existing streets shall be a minimum of 1.5% and maximum of 3.0%. Where a street constructed with a super elevation is to be widened, the cross slope shall be as specified by the City Engineer.
Vertical Curves
The minimum allowable vertical curve length at the intersection of two grades shall be 50 feet; however, vertical curves may be omitted where the algebraic difference in grades does not exceed 2.0%. When vertical curves are required, they shall provide for adequate sight distance based on the minimum design speeds specified in Table 5-5. The vertical curve data shall be computed and shown on the plans and shall call out the tangent gradient length of curve, the elevations and stationing points of the beginning of vertical curve (BVC), end of vertical curve (EVC), PI, high and low points and along 25 foot intervals.
5.10 Intersections
Street centerlines shall intersect one another at an angle as near to a right angle as is possible by tangents not less than 100 feet in length. In unusual circumstances the City Engineer may waive this requirement. Refer to Standard Drawings for required rights-of-way, pavement, taper lengths, etc. for intersections involving minor arterials and arterials.
At intersections, where two streets intersect, the centerline grade of the major street shall have a maximum centerline (longitudinal) grade of 2.0% for a minimum distance of 40 feet measured from the curb line of the intersecting street, except in unusually rough terrain, as determined by the City Engineer. The centerline of the minor street shall meet the crown slope at the projected lip of gutter. Crown slope may be reduced to 1.0% within the intersection if necessary.
5.11 Offset Intersections
The following requirements apply to all offset intersections. Any variation to these requirements shall be subject to the approval of the City Engineer. Distances are measured from centerline to centerline.
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1. Residential streets intersecting another residential street from opposite sides shall have their centerlines meet, or the offset between intersections shall be a minimum of 150 feet.
2. Minor and primary residential streets intersecting collector streets from opposite sides shall have their centerlines meet or the offset between the intersections shall be a minimum of 200 feet.
3. Minor and primary residential streets, and collector/industrial streets intersecting minor or arterial streets from opposite sides, shall have their centerlines. This condition shall not apply where a raised center median is provided on the major street separating conflicting turning movements.
4. Intersections between two arterials shall have their centerlines meet, or the offset between the intersections shall be a minimum of 1320 feet.
5.12 Elbow Intersections
Use of expanded corners shall be limited to projected low volume residential, commercial and industrial streets and conditions where conformance to minimum horizontal length of centerline radius is not practical and shall be subject to approval of the City Engineer.
5.13 Design Speed Sight Distances
Stopping Sight Distance
The minimum stopping sight distance over any segment of roadway shall be designed for the vehicle speeds listed in Table 5-5 unless specific approval for a lesser design speed is received from the City Engineer. Minimum stopping sight distance shall be consistent with that specified in the latest edition of Caltrans Highway Design Manual. The design stopping sight distance requirement is based on a 3.5-foot driver eye height and a 6-inch object height.
Table 5-5 Stopping Sight Distances
Street Type Roadway Design
Speed (mph)
Required Stopping Sight
Distance (feet)
Minor Residential 30 200
Collector/Industrial 45 360
Minor Arterial with On-Street Parking 55 500
Arterial with No Parking 60 580
Sight Distances for Cars Entering Side Streets or Driveways via Left Turn The design of left turns from public and private roadways entering streets and driveways shall provide minimum sight distance in accordance with Table 5-6 (single family residential exempt).
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Table 5-6 Entering Cars Sight Distance
Street Type Required Sight
Distance (feet)
Collector/Industrial 410
Minor Arterial with On Street Parking 530
Arterial with No Parking 695
Sight Distance is based on a 3.5 foot height at the location of the driver and a 3.5 foot object height in the center of the approaching lane of the major road. The left turn driver measurement is taken 4 feet from the left edge of the turn lane at the projected edge of the curb return (as shown above). If the major road is a multi-lane road, the controlling measurement for sight distance shall be based on the approach lane that is the worst case scenario.
Corner Sight Distances for Cars Exiting at Intersections and Driveways The design of all public streets, private streets, and major non-residential driveways shall provide minimum sight distance in accordance with the following requirements. Design speeds and the corresponding minimum corner sight distance shall be consistent with that specified in the latest edition of Caltrans Highway Design Manual.
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Table 5-7 Exiting Cars Sight Distance
Street Type Corner Sight Distance
Design Speed (mph)
Required Corner Sight
Distance (feet)
Minor Residential 30 330
Collector/Industrial 45 495
Minor Arterial with On-Street Parking 55 605
Arterial with No Parking 60 660
Setback for the driver of the vehicle on the crossroad shall be a minimum of 10 feet from the edge of travel way plus the shoulder width of the major road, but not less than 15 feet as shown above. Line of sight for corner sight distance is to be determined from a 3.5 foot height at the location of the driver of the vehicle on the minor road to a 4.25 foot object height in the center of the approaching lane of the major road. If the roadway being entered is a multi-lane road, the controlling measurement for sight distance shall be based on the approach lane that is the worst case scenario.
5.14 Driveways
When driveways are abandoned or relocated, the driveway section shall be removed and replaced with curb, gutter, and sidewalk conforming to these standards at no cost to the City.
Parking is restricted within the throat depth of all driveways.
All new driveways shall conform to the following requirements and Standard Details ST-10.
Widths and Locations
Single Family Residential and Duplex Driveways shall have a minimum bottom width of 12 feet, exclusive of the transition to full curb height at both ends. The maximum width shall provide for a bottom width of 24 feet, exclusive of the transition to full curb height at both ends.
The minimum width for all other driveways shall provide for the safe efficient and economical movement of traffic and shall be approximately 24 feet, exclusive of the transition to full curb height at both ends.
The maximum width of all commercial driveways shall be 35 feet, exclusive of the transition to full curb height at both ends, except this may be increased by the City Engineer where necessary to provide safe, efficient, and economical movement of traffic.
In the case of a driveway located adjacent to an alley, if approved by the City Engineer, the driveway apron may be combined with the alley but the total combined width shall not exceed 40 feet.
The driveway width may be modified by the City Engineer to facilitate turning movements where curb lanes are used.
The minimum length of full curb height between a driveway and a side property line shall be 3 feet. The minimum length of full height curb between driveways on adjacent lots shall be 6 feet unless specific approval is given by the City Engineer. No driveway shall be located closer than 6 feet from an existing or future alley entrance except as provided elsewhere in City of Gridley
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these standards. Where two or more driveways are constructed on the same lot, the minimum length of full height curb between driveways shall be 24 feet. Where practical to provide parking, the total length of full height curb between driveways shall be in multiples of 22 feet.
No driveway shall be located closer than 5 feet from a fire hydrant, traffic signal, street light, utility pole, or guy wire.
Slopes and Grading
The maximum grade for all driveways shall be limited to 12.5%, and 8% is desirable for commercial driveways. Sidewalk cross grade through the entire driveway shall be 1% minimum, 2% maximum.
5.15 Construction Staking
Construction staking shall be provided by the Developer for all surface improvements. Such staking shall provide the station and offset, as well as the cut to the nearest hundredth (0.01) of a foot. Stakes shall be provided at a minimum of every 50 feet in tangent sections and every 25 feet in curved sections. Monuments shall have straddle ties placed.
Cut sheets for the appropriate phase of work shall be on-site and shall be furnished to the City’s Construction Inspector upon request.
The Developer’s California Registered land surveyor shall stake the grades and location for the top and bottom of slope for all curb ramps.
5.16 Developer Responsibility for Improvements to Streets The following requirements apply to private development project adjacent to existing and proposed streets.
The Developer shall be responsible for upgrading streets within and adjacent to the Developer’s project where the pavement section of an existing street does not meet the structural section and/or the centerline grade and alignment requirements specified in these Construction Standards for those streets.
Where the design centerline grade is to be higher than the existing, the Developer shall extend the overlay beyond the centerline of the street and shall neatly conform to the existing surface grade on the other side. The Developer shall also be responsible for overlaying any low areas where the new pavement is proposed to meet the existing pavement to maintain a uniform cross slope.
When making a connection to an existing stub street, the Developer shall be responsible for removing and reconstructing up to a maximum of 20 feet of the existing roadway to make a satisfactory connection as required by the City Engineer.
When widening to complete an existing partial street along a development project, or when removing existing curb and gutter, the Developer shall be responsible for sawcutting and removing a narrow strip along the outside portion of the pavement to provide a clean and stable pavement section for constructing against. Grinding of existing pavement (1 1/2-inch minimum) shall be made to the next nearest edge of lane line. The width to be removed shall be determined by the City Engineer. In the case of curb and gutter removal, minimum width of pavement cut shall be 2 feet.
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All temporary approaches to existing roadways required as a result of the development shall be at the Developer’s expense. The temporary approaches shall be paved with the structural section to be determined individually for each situation.
The Developer shall be responsible for relocating existing traffic signals and streetlights, and installing new traffic signals and street lights as necessary for new street and driveway locations.
The Developer shall also be responsible for relocating existing traffic signals and street lights as necessary for the installation of new curbs or new curbs and sidewalks at locations where there are no existing curbs or curbs and sidewalks, or, where existing improvements do not meet current standards. Traffic signals must remain operational during all construction within signalized intersections.
The Developer is required to provide frontage improvements along existing and proposed roadways at the Developer’s expense. Frontage improvements include, but are not limited to, sidewalk, curb and gutter, center median, 18 feet pavement width, additional pavement width beyond the 18 feet for intersection widening (including acceleration and deceleration lanes, bus turnouts, widening for dual left turns, etc.), drainage system, landscaping, soundwalls, street lighting, roadway signing and striping, and all utilities (including traffic signal interconnect if applicable). For minor residential, primary residential, collector and industrial streets, the Developer shall provide the full right-of-way improvement.
For development within the “infill” areas of the City, the level of improvements to public streets adjacent to the development site shall be determined on a project specific basis at the discretion of the City Engineer.
The Developer shall be responsible for all drainage facilities (bridges, pipes, culverts, and appurtenances) crossing new streets within or adjacent to the project.
The Developer shall be responsible for all necessary modifications within the public right-of-way and the project site to comply with state and federal standards for access for disabled, including but not limited to sidewalk ramps.
5.17 Street Names and Signage
Street names shall be proposed by the Developer and shall be shown on the tentative map when submitted. These names shall be subject to approval by the City Council. No duplication of names already in use or previous proposed or sound alike names will be permitted. Street name signs shall be furnished and installed by the Developer. The requirements for location of signs do not apply to signalized intersections since signals will have their own street name signs.
Street signs shall conform to Standard detail ST-25.
5.18 Survey Monuments and Benchmarks
The consulting engineer or land surveyor shall place survey monuments at the following locations:
1. At the intersection of street centerlines.
2. At the beginning and end of curves on the street centerline.
3. At the center of all cul-de-sacs and elbow points.
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4. At the subdivision boundary corners and at such other locations so as to enable any lot or portion of the improvements to be retraced or located, as directed by the City Engineer.
The above-described monuments shall be as follows:
All monuments shall not be less substantial than ¾ inch diameter iron pipe of 5/8 inch diameter streel reinforcing bar, 18 inches long with a brass tag or plastic cap bearing the registration number of the engineer or surveyor who set the monument and shall be subject to inspection and approval by the City Engineer. “Permanent” monuments shall be set in concrete, and shall conform to Standard Detail ST-15. Before street improvements are accepted all monuments disturbed by the improvements shall be reset.
In making the survey for a subdivision, the consulting engineer or surveyor shall set “permanent” monuments at all angle and curve points on the exterior boundaries of the subdivision, in all street intersections, at all angle points of street lines, and at all points of curvature, both simple and compound, of street lines. “Permanent” monuments at street intersections and at angle and curved points of street line shall be set on street centerlines, unless otherwise directed by the City Engineer, provided however that the “permanent” monuments need not be set at intervals of less than 400 feet.
There shall be one or more permanent benchmarks for each subdivision, of a type approved by the City Engineer and referred to the City Datum, set at each street intersection in the curb return or other location approved by the City Engineer. The benchmark shall be a brass disc 2 inches +/- in diameter, set in concrete.
5.19 Installation
Subgrade for Sidewalk and Curb Ramps, Curb and Gutter, Driveways and Asphalt Concrete Paving
Subgrade shall be processed to 95% relative compaction, minimum 6 inches plus, and shall be tested and certified by a geotechnical engineer, licensed in California. Written certification shall be provided to the City prior to the placement of concrete (and aggregate base or aggregate subbase for asphalt concrete). For meandering sidewalks, Class II aggregate base may be substituted for native subgrade at the Contractor’s discretion and shall be processed to 95 % relative compaction.
Additionally, subgrade stability for curb, gutter and sidewalk and asphalt concrete pavement shall be load tested by proof rolling with a loaded, minimum 3,000 gallon water truck (or equipment of equivalent weight as approved by the City) in the presence of the City, the Geotechnical Engineer and the Contractor. The proof roll test shall be repeated following corrective measures. Prior to placement of aggregate base, deflection in the subgrade shall be eliminated. Placement of aggregate base shall not commence without the approval of the City.
Sidewalk subgrade exposed upon removal of existing sidewalk shall remain in tact unless it is determined by the City’s Construction Inspector to be unstable. In this event, it shall be processed per the preceding paragraphs.
Deflecting, unstable areas shall be corrected per the recommendation of the Geotechnical Engineer and upon the approval of the City’s Construction Inspector prior to placement of aggregate base, or concrete curb, gutter and sidewalk.
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Aggregate Base and Subbase
Roadway aggregate base and subbase, lime/cement treated base and sidewalk, curb and gutter shall not be placed until the following items of construction within the City street right-of-way and Public Utility Easement (PUE) are completed:
5. Installation of underground sewer and water systems, including testing, televising, and obtaining approval.
6. Completion of testing for the presence of bacteria and the water system tie- in shall not be requirements for the approval of commencement of surface improvement construction. However, the water main tie-in shall be completed prior to asphalt concrete paving. The Contractor shall schedule operations such that the curb, gutter and sidewalk pour shall not be conducted on the same day as the water tie-in.
7. Installation and mandrelling of the non-rigid underground storm drain pipe and approval of same by the City’s Construction Inspector.
8. Installation of electric, natural gas, telephone, traffic signal (including interconnect) and cable TV, including mandrelling and testing of all conduits, installation of 4x4 markers a minimum of 2 feet high, painted red, buried at the crossing ends (if conduit ends do not extend up from finish grade). This includes all dry utility crossing and longitudinal trenches.
9. Backfill and compaction testing of all trenches related to the above and approval of same by the City’s Construction Inspector.
All aggregate base and subbase (AB and ASB) shall be installed per provisions in the most recent edition of Caltrans Standard Specifications. AB and ASB shall be compacted to 95% relative compaction. An oil seal is not required on the AB surface. If required by the City’s Construction Inspector, AB and ASB shall be tested for compaction and approved by geotechnical engineer, licensed in California. It shall be proof rolled if requested by the City’s Construction Inspector. Written certification of compliance to these requirements shall be provided to the City’s Construction Inspector.
Aggregate base shall be installed as a base for asphalt concrete paving where specified on the approved plans including over lime and fly ash or cement treatment is used to stabilize the ASB.
Where lone valley gutters are placed within the City pavement as in an alley, the aggregate base section for the gutter shall extend to the same depth as the aggregate base section for the adjacent asphalt concrete pavement.
Prior to paving, deflection in the compacted AB shall be eliminated. Paving shall not commence without the approval of the City’s Construction Inspector.
Lime/fly ash or other stabilizers may be permitted for subbase stabilization as recommended by the geotechnical engineer and shall not be used as a substitute for structural section components. The City, following addition and processing of lime/fly ash or cement shall require mandrelling of all non-rigid and shallow rigid underground utilities at the discretion of the City’s Construction Inspector. All utility systems shall be cleaned as appropriate. In the event a dig up and repair is required following lime/cement treatment of ASB; the entire excavation shall be backfilled with either 2-sack cement slurry, or dry native City of Gridley
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material compacted and conforming to these Standards. Subgrade stability for roadway and/or concrete curb, gutter & sidewalk shall be reload tested by proof rolling with a loaded 3,000 gallon water truck and approved by the City Construction Inspector prior to the placement of aggregate base.
Concrete
All concrete curbs, curb & gutters, sidewalks, curb ramps, driveways, bus stop pads and turnouts shall be installed per provisions the Caltrans Standard Specifications, and the Standard Details including the following provisions:
1. All residential and commercial sidewalks shall be either 6 inch thick, or 4 inch thick with 4 inch of compacted aggregate base.
2. All commercial driveways, round a bout centers and bus turnouts shall be 8 inch thick with number 4 grade 60 rebar on 18-inch centers each way. Rebar shall be set on 3 inch concrete dobies/rebar supports at three foot maximum spacing each way. The dobies shall include wire ties. Base for commercial driveways may be processed native subgrade or ¾ inch aggregate base compacted to 95% relative compaction.
3. Concrete shall not be placed or finished in the rain. It shall be the Contractor’s responsibility to schedule construction operations accordingly. All gutters shall be flow tested with water during the pour to assure proper drainage. Following concrete finishing, no water shall pond in the gutter pan. All concrete surfaces shall be completed with a medium broom finish unless otherwise specified. A heavy broom finish is not allowed. A concrete finish not conforming to the Caltrans Standard Specifications with regard to blemishes and alignment tolerances shall be cause for rejection of the work.
No stamps advertising construction companies or other private concerns shall be placed in the concrete. A detectable warning (truncated dome) panel shall be placed at the back of curb line, immediately behind the curb and gutter, centered in the opening to the street (regardless of slope) at every curb ramp (And shall not be sized as shown on the Case C ramp on Caltrans Revised Standard Plan RSP A88A). At minimum, the panel shall consist of a one piece, 4 foot by 3 foot panel but shall be sized according to the path of travel dimension. The long dimensions of the panel shall be along the face of curb. The top, flat, dome panel surface (excluding the domes) shall be placed flush with the adjacent top of concrete surface. Any runoff water standing behind the curb, on the panel, or concrete voids under the panel, shall be cause for replacement of the panel.
Tool Joints
Tool joints and score marks shall be placed through the sidewalk, curb and gutter section at the following intervals for the sidewalk widths indicated. All tool joints shall be a minimum 2 inches. There shall be no expansion joint material used in the City right-of-way.
The purpose of the tool joint is to separate the aggregate and control cracking. During concrete finishing, after placement of a minimum 2 inch deep tool joint, the joint shall be redressed/finished with a 3/8 inch joint tool.
All tool joints shall conform to Caltrans Standard Specifications for Joints. The use of sawcutting in lieu of deep tool joints is not acceptable.
Monolithic Sidewalk, Curb & Gutter
All adjoining sidewalk, curb and gutter shall be poured monolithically.
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Curb and Gutter Installation in Existing Street
In an existing street, a minimum width of 24 inches of existing asphalt concrete paving shall be removed outside the proposed gutter lip and the lip poured against a form board. The resulting patch between the gutter lip and the existing pavement shall be 6 inches thick minimum, or the thickness of the existing pavement, whichever is greater. The AC patch shall be placed within two weeks of the conclusion of the concrete pour.
The minimum waiting period for pavement patching is three days from the date of placement or, the length of time needed for the concrete to reach 80% of its required ultimate strength, whichever is more. The gutter may be placed against the existing pavement if the City’s Construction Inspector determines the pavement edge is flawless. In this case, the gutter lip shall not be edged and shall be poured 1/4 inch below the existing pavement.
Curb Ramps, General
All curb ramps shall conform to the most recent edition of Caltrans Standard Specifications.
Curb, Gutter and Sidewalk Patching
A professional concrete mason shall apply the patch. The patch shall be flush with the existing concrete and a similar finish shall be maintained. The City’s Construction Inspector shall determine if the damage to the concrete warrants patching. Generally, any conspicuous damage shall be patched.
Dowelling New Concrete to Existing
When pouring combinations of sidewalk or curb and gutter contiguous to existing, the existing concrete vertical face shall be doweled three feet on center with 16 inch long, grade 60, #4 rebar penetrating 4 inches into the existing curb, four inches below top of curb. The dowel hole shall be 5/8-inch diameter at a slight angle horizontally. The penetrating portion of the dowel and the entire cleaned vertical surface of the adjoining existing concrete shall be 95% coated with two-part epoxy. All abutting sidewalk shall be doweled mid-section with 2 dowels for 4 through 6-foot wide sidewalk and 3 dowels for wider sidewalk. Abutting curb and gutter ends shall be doweled twice, 18 inches apart, centered on the curb and gutter section.
Where the street side of the meandering sidewalk meets the back of Curb at less than a 90 degree angle, the return to the back of curb shall be a minimum 18 inch radius or 18 inch space shall be provided between the front face of sidewalk and the back of curb.
Replaced sections shall be removed back to score marks, expansion joints or deep tool joints; or at the discretion of the City’s Construction Inspector.
If the existing edge is damaged during removal, the concrete shall be sawcut again at the City’s Construction Inspector’s discretion.
Sidewalk, Curb and Gutter Replacement
Where sidewalk and/or curb and gutter is being replaced, the maximum length of sidewalk that may be replaced non-monolithically (without the attached curb and gutter) is 20 feet. If more than 20 feet is damaged continuous, the total sidewalk, curb and gutter section shall be removed and replaced monolithically. Where sidewalk, curb and gutter or curb ramps City of Gridley
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and driveways with sidewalk, curb and gutter as portions thereof are replaced, all replacement shall conform to these Construction Standards.
Damaged Gutter Lip
Gutter lip damaged during the grading and rocking operation shall be patched or replaced.
Any spall extending more than 1 inch into the gutter pan from the vertical face of the gutter lip shall be patched at a minimum.
Concrete and Asphalt Concrete Saw Cutting
Residual from sawcutting shall be removed by vacuum method and disposed of conforming to local environmental and State Stormwater Pollution Prevention Plan requirements. The downstream drain inlet shall be protected. In no case shall the residual be allowed to enter the storm drain system. The above-specified cleanup shall be the responsibility of the contractor.
Asphalt Concrete Paving
All asphalt concrete (AC) paving shall be Hot Mix Asphalt (HMA) unless approved by the City Engineer and Public Works Director and installed per the most current adopted provisions in the most recent Caltrans Standard Specifications, except as amended by these Standards.
No paving shall occur until all underground work is completed, tested and subgrade and/or aggregate base and/or lime and fly ash or cement treated base have been accepted by the City.
Mix Design
The Contractor shall provide the asphalt concrete mix design to the Director of Development Services at least 10 working days prior to the start of the work on the project for review and approval. The mix design must be approved prior to commencement of work.
The asphalt concrete mix design shall indicate the following:
1. Complete aggregate grading with the percentage of aggregate passing each sieve size.
2. Percent air voids for each percentage of asphalt binder used in the mix design determination.
3. Stability – Per MS-2 Asphalt Mix Design Methods per Sections 3 and 8. Mis design requires Hamburg Wheel (AASHTO T 324) and Moisture Susceptibility (AASHTO T 283) once per project or every 10K tons.
4. Maximum theoretical density for each percentage of asphalt binder used in the mix design determination.
5. Compacted unit weight for each percentage of asphalt binder used in the mix design determination.
6. Percent asphalt binder recommended. (Optimum bitumen content, OBC).
The amount of asphalt binder (OBC) to be mixed with the aggregate for asphalt concrete will be recommended by the material supplier and approved by the City Inspector based on data from California Test Method CTM 367 provided by the Contractor. CTM 309 shall be used for determination of the theoretical maximum specific gravity at each asphalt binder content.
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However, the ratio for asphalt binder to the dry weight of aggregate shall be limited to 4- 7%.
The actual asphalt cement content may vary up to 0.5% plus/minus form the target optimum bitumen content (OBC). For Job Mix Formula, -0.3 to +0.5 %.
Spreading and Compactions
Equipment shall conform to the most recent edition of Caltrans Standard specifications.
All spreading and compacting construction activities shall conform to the most recent edition of the Caltrans Standard Specifications.
Miscellaneous
The Contractor shall schedule paving operations such that at the end of each work shift, each layer of asphalt concrete is placed on all contiguous lanes and shoulders of a traveled way to be opened to public traffic.
At the end of each work shift, the distance between the ends of the layers of asphalt concrete on adjacent lanes shall not be greater than 10 feet nor less than 5 feet. A drop-off of more than 0.15-foot will not be allowed at any time between adjacent lanes open to public traffic.
Additional asphalt concrete shall be placed along the transverse edge at the end of each lane and along the exposed longitudinal edges between adjacent lanes, hand raked, and compacted to form temporary conforms. Kraft paper, or other approved bond breaker, may be placed under the conform tapers to facilitate the removal of the taper when paving operations resume.
Additional asphalt concrete surfacing material shall be place along the edge of the surfacing at private drives, hand raked, if necessary, and compacted to form smooth tapered conforms.
Longitudinal joints in successive pavement lifts shall be offset from lift to lift a minimum of one foot. The surface pass seam shall be located on the lane line. Where extruded concrete curb is removed for pavement widening, Contractor shall grind 1-1/2 inches of pavement between the nearest lane line and the existing curb and gutter line (including bike lanes).
Following placement of the asphalt concrete base lift within the widening section, and 1-1/2 inches below the new gutter lip, Contractor to replace Petromat fabric or approved equal in grounded area, place asphalt concrete overlay, and restripe and/or replace any delineators removed during the grind.
Prior to permanent patching in a pavement removal area, fresh cut- back (temporary pavement) in a minimum thickness of 2 inches shall be placed as a driving surface.
Whether the surface material is fog sealed or cutback or slurry, the Contractor shall be tenacious in maintaining the surface in a condition and to a grade comparable to the permanent patch. No other materials are allowed as temporary pavement. Placement of steel plates over fresh slurry may be employed when approved by the City Engineer or City Construction Inspector.
The temporary surface shall be flush with the surrounding pavement and shall accommodate a smooth drive across it.
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Sand and dirt shall not be allowed to accumulate on the slurry surface and adjacent street. It shall be swept daily if necessary.
Utility boxes in asphalt concrete, off-street paths shall include a 12 inch x 12 inch, concrete collar “minor concrete” conforming to the most recent edition of Caltrans Standard Specifications. The top of the collar shall be three inches below the surrounding pavement and the area shall be patch-paved with asphalt concrete as with manholes, water valves and monuments in the street way.
If a bucket or tank or diesel fuel is carried on the paver for the purpose of cleaning rakes and shovels, a container of grease sweep or equivalent absorbent material shall also be carried on the paver. All diesel spills shall be promptly cleaned up.
Existing Pavement
1. Cut lines made on existing pavement, both longitudinally and transversely, for the placing of new structural section shall be straight and smooth.
2. Edge grinding (Cold Planning) shall be required where existing asphalt is to be overlayed.
The edge grind shall match the depth of the asphalt concrete overlay along the length of the gutter lip and abutting pavement where the asphalt concrete pavement is proposed to conform to the existing pavement.
3. Existing pavements to be overlayed with asphalt concrete shall include the installation of pavement reinforcing fabric in accordance with Section 96, Materials of the Caltrans Standard Specifications at the discretion of the City’s Construction Inspector.
4. Existing AC surfaces to remain shall be cut in a straight line parallel to the street centerline, and the exposed edge shall be tracked with SS1H emulsion or equivalent prior to paving. For moratorium defined streets, CRAFCO Pavement Adhesive, “Qwik Seal” or approved equal shall be used per manufacturer recommendations. The exposed base material shall be graded and re-compacted per these Construction Standards prior to paving. Graded and re-compacted areas shall be approved by the City’s Construction Inspector prior to paving.
5. Where an excavation in the public right of way is backfilled with two-sack cement slurry per these Construction Standards, the slurry may be brought to the top of the trench until permanent patching. Where rock-saw utility trenching is necessary in the bottom lift of asphalt concrete and prior to placement of top lift of asphalt concrete, the rock saw trench shall be covered with Glasgrid product (8512, with 100X200 KN tensile strength) or approved equal, at the manufacturers recommendations prior to the placement of top lift of asphalt.
6. If the width of existing pavement between the gutter lip and excavated patch/pave area is 3 feet or less, all existing pavement between the patch/pave area and the gutter lip shall be removed or milled 0.15 feet in depth, and patched conforming to the adjacent patch/pave area requirements.
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5.20 Materials
Aggregate Base and Subbase
All aggregate base and subbase (AB and ASB) materials shall be Class 2 as specified on the approved improvement plans and shall conform the most recent edition of the Caltrans Standard Specifications.
Recycled asphalt concrete material may be used as AB or ASB provided the Contractor supplies the City written documentation and certification that the material meets the State’s Class 2 specifications prior to placement.
Concrete
All Concrete curbs, gutters, driveways, island paving, sidewalks, curb ramps, driveways, island and colored concrete, and shall be constructed of minor concrete conforming to the most recent edition of Caltrans Standard Specifications The cementitious material content of concrete must be a least 463 lb/cu yd. for constructing minor concrete as listed above.
The aggregate size may range from 3/8-inch to 1-inch. However, if 3/8-inch maximum size aggregate is used, cementitious material content must be a least 505 lb/cu yd, All other minor concrete for extruded or slip-form curb construction, retaining wall footings, utility box collars, rock wheel backfill, and miscellaneous footings, shall be constructed of minor concrete conforming to the provisions in the most recent Caltrans Standard Specifications, material content must be a least 505 lb./cu yd.
Asphalt Concrete
Shall comply with the most current adopted edition of Caltrans Standard Specifications and as modified herewith. The requirements provided within these provisions shall supersede State Specifications where conflicts or other disparities exist.
Asphalt binder shall be performance grade 64-10 paving asphalt conforming to the most recent edition of the Caltrans Standard Specifications.
Asphalt concrete for alley’s residential and collector roadways shall be Type A, 1/2-inch Maximum Medium Gradation, conforming to the requirements of most recent edition of Caltrans Standard Specifications.
Reclaimed Asphalt Pavement (RAP) up to 15% of aggregate blend may be substituted as part of the virgin aggregate for hot mixed asphalt and shall meet the State’s quality specifications. RAP not permitted in OGFC or RHMA-G.
Asphalt concrete shall be hot plant mixed and shall be furnished from the plant at a temperature not to exceed 325° Fahrenheit.
Lime/Fly Ash or Cement treated Subbase
On a case-by-case basis, lime/fly ash or cement treated subbase may be an acceptable substitute for placement of compacted aggregate base material. Prior to plan approval, the Developer shall submit to the City Engineer for review and approval, a proposal for lime/fly ash or cement treatment sections and compaction procedures, accompanied by recommendations from a California licensed, geotechnical engineer. In no case shall asphalt concrete be placed directly on lime/fly or cement treated bases.
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Truncated Domes
Truncated dome panels shall be of vitrified polymer composite construction, embedded type, or (surface applied for retrofit applications) manufactured by Armor Tile Tactile Systems, Buffalo, New York, ADA Solutions, N. Billerica, MA, or approved equal. The dimensions and interval of the truncated domes within the panel shall conform to Caltrans Standard Plan RNSP A88 and Division of the State Architect Accessibility Reference Manual, Figure No. 31-23A. The orientation of the dome pattern for all panels shall be parallel with the panel edges.
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Signage and Striping
6.1 General
This section governs the design, installation, modification, and maintenance of all traffic signage, pavement striping, and pavement markings within the public right-of-way and on private property where such improvements are required as a condition of development approval.
All signage and striping shall be designed and installed to provide clear, consistent, and enforceable traffic control that promotes public safety for motorists, bicyclists, and pedestrians.
6.2 Governing Standards
All signage and striping shall conform to the following, in order of precedence:
1. Approved improvement plans and traffic control plans
2. City of Gridley Design and Construction Standards and Standard Details
3. Latest edition of the California Manual on Uniform Traffic Control Devices (CA MUTCD)
4. Caltrans Standard Specifications and Standard Plans
Where conflicts occur, the more restrictive requirement shall apply, as determined by the City Engineer.
6.3 Permanent Signage
Permanent regulatory, warning, and guide signs shall be installed only at locations approved by the City Engineer.
Classification of Permanent Traffic Signs
Permanent traffic signs shall be classified into the following categories:
• Regulatory Signs
• Warning Signs
• Guide Signs
Each category has specific requirements for shape, color, legend, and application.
Regulatory Signs
Regulatory signs inform road users of traffic laws, regulations, and requirements that must be obeyed. These signs are enforceable by law.
Shape and Color Requirements
Regulatory signs shall conform to the following CA MUTCD-required shapes and colors:
STOP: Octagonal shape, red background, white legend and border YIELD: Downward-pointing triangular shape, red and white background, red legend SPEED LIMIT: Rectangular shape, white background, black legend and border DO NOT ENTER: Rectangular shape, red background, white legend City of Gridley
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ONE WAY: Rectangular shape, black background, white legend NO PARKING / NO STOPPING / NO STANDING: Rectangular shape, white background, red legend and border
No deviations from these shapes or colors shall be permitted unless approved in writing by the City Engineer.
Legend and Design
Regulatory sign legends shall use standard CA MUTCD-approved wording, symbols, and abbreviations. Custom legends or non-standard wording are prohibited.
Minimum letter sizes shall comply with CA MUTCD requirements based on roadway classification and posted speed.
Warning Signs
Warning signs alert road users to potentially hazardous or unexpected roadway conditions that may not be readily apparent.
Shape and Color Requirements
Warning signs shall conform to the following CA MUTCD-required shapes and colors:
General Warning Signs: Diamond shape, yellow background, black legend and border Pedestrian and Bicycle Warning Signs: Diamond or rectangular shape, fluorescent yellowgreen background, black legend School Zone Signs: Pentagon shape or rectangular supplemental signs, fluorescent yellowgreen background, black legend Advisory Speed Signs: Rectangular shape, yellow background, black legend Warning signs shall be installed only where engineering judgment indicates a need.
Excessive or unnecessary warning signage is discouraged, as it reduces overall effectiveness.
Advisory speed signs shall be supported by roadway design speed, field conditions, or an engineering study, as approved by the City Engineer.
Guide Signs
Guide signs provide route, destination, and location information to assist road users.
Shape and Color Requirements
Guide signs shall conform to the following CA MUTCD-required shapes and colors:
Street Name Signs: Rectangular shape, green background, white legend Route Markers: Shapes and colors as specified by CA MUTCD for state, county, or local routes
Destination and Wayfinding Signs: Rectangular shape, green or blue background, white legend
Letter height, font, spacing, and contrast shall comply with CA MUTCD requirements.
Retroreflectivity
All permanent traffic signs shall be retroreflective and shall maintain minimum nighttime visibility in accordance with CA MUTCD requirements.
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Signs that no longer meet minimum retroreflectivity standards due to age, damage, or fading shall be replaced.
Mounting Height and Lateral Offset
Permanent traffic signs shall be installed at mounting heights and lateral offsets consistent with CA MUTCD requirements.
In areas with curb and sidewalk, the bottom of the sign shall be a minimum of seven (7) feet above the sidewalk surface.
In areas without curb or sidewalk, the bottom of the sign shall be a minimum of five (5) feet above the near edge of traveled way.
Exact placement shall be determined based on visibility, sight distance, and field conditions, subject to approval by the City Engineer.
Location and Approval
Permanent traffic sign locations shall be shown on approved improvement plans or approved in writing by the City Engineer.
Signs shall not obstruct sight distance, pedestrian access, or accessibility features, and shall not conflict with other traffic control devices.
Installation Timing
Permanent traffic signs shall be installed after roadway geometry, curb, gutter, and sidewalk construction are complete and prior to final acceptance, unless otherwise approved by the City Engineer.
Temporary signage shall be used during construction until permanent signs are installed.
Ownership and Maintenance
Upon acceptance by the City, permanent traffic signage shall become the property of the City of Gridley and shall be maintained by the City unless otherwise specified.
6.4 Prohibited Signs
The following are prohibited within the public right-of-way unless otherwise approved by the City Engineer:
• Non-CA MUTCD compliant signs
• Decorative or novelty signs intended to regulate traffic • Private signs attempting to control public traffic
• Signs with non-standard colors, shapes, or legends
Street name signs shall be furnished and installed by the Developer and shall be subject to review and approval by the City prior to installation. Duplicate, confusing, or nonstandard sign legends shall not be permitted.
6.5 Temporary and Construction Signage
Temporary signage shall be provided to warn roadway users of construction activities, detours, lane closures, and changed roadway conditions.
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Temporary signs shall be retroreflective, properly mounted, and maintained in a clean and legible condition. Signs shall be removed immediately when no longer applicable.
6.6 Removal, Relocation, and Replacement
Existing signage impacted by construction shall be protected, temporarily relocated, or replaced as required by the City Engineer. Any sign damaged, removed, or rendered illegible as a result of construction shall be replaced at the Contractor’s expense prior to project acceptance.
6.7 Pavement Striping and Markings
All pavement striping and markings shall conform to CA MUTCD requirements, Caltrans specifications, and City Standard Details.
Striping materials may include traffic paint, thermoplastic, or other City-approved materials.
Reflective glass beads or equivalent shall be applied to all markings to provide nighttime visibility.
Temporary Striping
Temporary striping shall be installed whenever permanent striping is removed or obscured during construction. Temporary striping shall provide clear lane guidance and shall remain in place until permanent striping is installed.
Permanent Striping
Permanent striping shall be installed only after final paving operations are complete and approved by the City.
Removal of Existing Striping
Conflicting or obsolete striping and pavement markings shall be removed by grinding or other approved methods that do not damage the pavement surface.
City of Gridley
Public Works Construction Standards Section 7
7-1
Lighting and Traffic
7.1 General
This section governs the design, installation, modification, and acceptance of street lighting, traffic signal electrical systems, and associated appurtenances within the public right-of-way.
All traffic systems and electrical improvements shall be submitted to the City Engineer for review and approval prior to construction.
7.2 Governing Standards
Lighting and electrical systems shall conform to the following, as applicable:
• City of Gridley Design and Construction Standards and Standard Details • Approved improvement plans
• Latest edition of the California Electrical Code
• Caltrans Standard Specifications and Standard Plans
• CA MUTCD (for signal-related installations)
• Applicable utility provider requirements
Where conflicts occur, the more restrictive requirement shall apply as determined by the City Engineer.
7.3 Street Lighting Requirements
Street lighting shall be provided along public streets as required by the City Engineer based on street classification, safety considerations, and consistency with existing City lighting systems.
Lighting design shall address illumination levels, uniformity ratios, glare control, energy efficiency, and maintenance access. Pole types, luminaires, mounting heights, and spacing shall be consistent with City standards unless otherwise approved.
7.4 Electrical Systems
All electrical work shall be performed by licensed electricians in accordance with applicable codes.
• Electrical improvements may include, but are not limited to:
• Underground conduits
• Pull boxes and vaults
• Foundations
• Conductors and wiring
• Grounding systems
All electrical systems shall be inspected and tested prior to acceptance by the City.
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7.5 Traffic Signal Systems
Traffic signal installations, modifications, or relocations shall require approval by the City Engineer.
Signals shall remain operational during construction unless a planned outage is approved.
Temporary signal operation or alternate traffic control may be required to maintain traffic flow and safety.
7.6 Acceptance
Lighting and traffic electrical systems shall not be energized or placed into permanent operation until all inspections, testing, and documentation have been completed and approved by the City.
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Traffic Impact Studies
8.1 Purpose
Traffic Impact Studies (TIS) evaluate the effects of proposed development on the City’s transportation system and identify mitigation measures necessary to maintain safe and efficient operations.
8.2 Applicability
A Traffic Impact Study shall be required for development projects that may generate traffic volumes, patterns, or operational impacts exceeding thresholds established by the City Engineer.
The City Engineer may waive or modify study requirements for projects with minimal traffic impacts or require supplemental analysis for projects with unique characteristics.
8.3 Study Preparation
Traffic Impact Studies shall be prepared by a licensed traffic engineer experienced in traffic analysis and transportation planning.
8.4 Study Content
Traffic Impact Studies shall include, at a minimum:
• Description of the proposed development
• Existing traffic conditions
• Project-generated traffic
• Future traffic conditions with and without the project • Intersection and roadway level of service analysis
• Multimodal impacts including pedestrian, bicycle, and transit considerations • Safety analysis and collision history where applicable • Identification of required mitigation measures
8.5 Mitigation Measures
Mitigation measures identified in an approved Traffic Impact Study shall be implemented by the Developer as conditions of project approval.
Mitigation may include, but is not limited to:
• Intersection improvements
• Traffic signal modifications
• Additional traffic lanes or turn pockets
• Access modifications
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• Transportation demand management measures
• Fair-share contributions toward off-site improvements
8.6 Updates and Revisions
Traffic Impact Studies may be required to be updated if project scope, phasing, or surrounding conditions change prior to construction or occupancy.
8.7 Acceptance
Approval of a Traffic Impact Study does not relieve the Developer of responsibility to implement all required mitigation measures or comply with applicable City standards.
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Trench and Backfill
9.1 General
All trenching and backfill within the City of Gridley shall be performed in accordance with these Standards, the City of Gridley Standard Details, and the approved improvement plans. Trench excavation, bedding, backfill, and compaction shall be suitable for the intended utility and surface condition and shall be constructed to provide long-term structural support and minimize future settlement.
All trenching within City rights-of-way shall conform to the City’s Standard Details and these standards. Where conflicts occur, the Standard Details and approved plans shall govern unless otherwise approved by the City Engineer.
Jetting of trenches is not permitted unless specifically approved in writing by the City Engineer.
9.2 Trenching Operations
All trenching operations shall comply with all applicable Federal and State safety requirements, including Cal/OSHA regulations. Domestic Water Excavation and Trenching Earthwork required to construct water pipelines, facilities and appurtenances shall be performed to the lines and grades shown on the approved project plans and as specified below:
Excavations
Pipeline excavations shall be open-cut trenches, unless otherwise specified on the approved improvement plans. Excavations shall conform to all applicable Federal and State safety requirements. All work shall be conducted in such a manner as to prevent damage to new and existing facilities or adjoining property. The contractor shall appoint a designated “competent person” during construction.
For water mains the trench shall be excavated a minimum of 6 inches below the outside diameter of the pipe per elevation on the approved plans. For water services the trench shall be excavated a minimum of 4 inches below the outside diameter of the pipe per elevation on the approved plans. For both water mains and services, if rocky or unyielding soil is encountered the trench shall be over excavated by 12 inches and backfilled with bedding material.
Trench Width
The trench bottom width shall be at a minimum the outside diameter of the pipe plus 12 inches and at a maximum the outside diameter of the pipe plus 4 feet and shall comply with the Standard Details or as approved by the City. If rocky or unyielding soil is encountered the trench width shall be increased by 12 inches. A minimum clearance of 6 inches shall be maintained between the pipe and the trench wall.
Compaction
Compaction of the trench shall conform to the Standard Details. Compaction test results shall be supplied to the City Inspector upon request. Jetting of trenches is not allowed.
Weather
Trenching during inclement weather should be avoided when possible. If trenching during inclement weather is required, trenches shall be excavated only as far as pipe can be laid and backfilled during the course of the day.
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Existing Roadways
Trenching in existing roadways shall be limited to the length of pipe that can be laid that day. No open trenches shall be left overnight. Exposed trenches shall be plated and backfilled as approved by the City Inspector.
Excess Material
Excess material and materials determined unsuitable for backfill by the City Inspector shall be removed from the project site.
Dewatering
Dewatering for the installation of structures and pipelines shall commence when groundwater is first encountered and shall be continuous until the excavation is backfilled.
Best Management Practices (BMP’s) including but not limited to scouring and erosion measures shall be used to eliminate sediment-laden discharges in accordance with the approved SWPPP.
9.3 Sanitary Sewer Excavation and Trenching
Earthwork required to construct sewer pipelines, facilities and appurtenances shall be performed to the slopes and grades shown on the approved project plans and as specified in the following:
Excavations
Pipeline excavations shall be open-cut trenches, unless otherwise specified on the approved improvement plans, and as specified on the Standard Details. Excavations shall conform to all applicable Federal and State safety requirements. All work shall be conducted in such a manner as to prevent damage to new and existing facilities or adjoining property. The contractor shall appoint a designated “competent person” during construction.
The trench shall be excavated a minimum of 3 inches below the outside diameter of the pipe per elevation on the approved plans for 12 inch diameter pipe or less. For pipes with a diameter greater than 12 inches it shall be excavated a minimum of 4 inches. If rocky or unyielding soil is encountered the trench shall be over excavated by 4 inches and backfilled with bedding material.
Trench Width
The trench bottom width shall be at a minimum the outside diameter of the pipe plus 2 feet and at a maximum the outside diameter of the pipe plus 4 feet and shall comply with the Standard Details or as approved by the City. A minimum clearance of 6 inches shall be maintained between the pipe and the trench wall.
Compaction
Compaction of the trench shall conform to the Standard Details. Compaction test results shall be supplied to the City Inspector upon request. Jetting of trenches is not allowed.
Weather
Trenching during inclement weather should be avoided when possible. If trenching during inclement weather is required, trenches shall be excavated only as far as pipe can be laid and backfilled during the course of the day.
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Existing Roadways
Trenching in existing roadways shall be limited to the length of pipe that can be laid that day. No open trenches shall be left overnight. Exposed trenches shall be plated or backfilled as approved by the City inspector.
Excess Material
Excess material and materials determined unsuitable for backfill by the City Inspector shall be removed from the project site.
Dewatering
Dewatering for the installation of structures and pipelines shall commence when groundwater is first encountered and shall be continuous until the excavation is backfilled.
Best Management Practices including but not limited to scouring and erosion measures shall be used to eliminate sediment-laden discharges in accordance with the approved SWPPP.
9.4 Storm Drain Excavation and Trenching
All drainage improvements shall conform the following requirements:
Excavation
Pipeline excavation shall be open-cut trenches, unless otherwise specified on the approved improvement plans. All excavations shall adhere to all applicable Federal and State safety requirements. All work shall be conducted in such a manner as to prevent damage to new and existing facilities or adjoining property.
The trench shall be excavated a minimum of 3 inches below the outside diameter of the pipe per elevation on the approved plans for 12 inch diameter pipe or less. For pipes with a diameter greater than 12 inches it shall be excavated a minimum of 4 inches. If rocky or unyielding soil is encountered the trench shall be over excavated by 4 inches and backfilled with bedding material.
Trench Width
For pipes with an outside diameter of 30 inches or less the trench width shall be outside diameter plus 16 inches. For pipes with an outside diameter greater than 30 inches the trench width shall be equal to the outsider diameter multiplied by 1.25 plus 12 inches. A minimum clearance of 6 inches shall be maintained between the pipe and the trench wall.
Compaction
Compaction of the trench shall conform to the Standard Details. Compaction test results shall be supplied to the City upon request. Jetting of trenches is not allowed.
Weather
Trenching during inclement weather should be avoided when possible. If trenching during inclement weather is required, trenches shall be excavated only as far as pipe can be laid and backfilled during the course of the day.
Existing Roadways
Trenching in existing roadways shall be limited to the length of pipe that can be laid that day. No open trenches shall be left overnight. Exposed trenches shall be plated or backfilled as approved by the City inspector.
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Excess Material
Excess material and materials determined unsuitable for backfill by the City Inspector shall be removed from the project site.
Dewatering
Dewatering for the installation of structures and pipelines shall commence when groundwater is first encountered and shall be continuous until the excavation is backfilled.
Best Management Practices including but not limited to scouring and erosion measures shall be used to eliminate sediment-laden discharges in accordance with the approved SWPPP.
9.5 Trench and Backfill
Trench backfill within the City street right- of-ways shall conform to the Standard Details.
Moisture content shall be controlled to obtain the optimum density for the soil type encountered. All compaction testing shall conform to ASTM D1557-78 test methods. Trench and backfill compaction shall be tested and certified by a licensed geotechnical engineer at the Developer’s or Contractor’s expense. Certification shall be provided to the City Inspector prior to the construction of surface improvements.
Backfill for joint utility trench shall be clean sand or 3/4 inch aggregate base uniformly graded with a minimum sand equivalent of 25 or Class 2 Aggregate Base. Compacted to 95% relative compaction.
Following paving operations and where utility valve clusters are present, standard mechanical compaction efforts and equipment may have limited access to achieve adequate compaction per these Standards. In these cases, it is authorized that controlled low-strength material (CLSM)may be used within the valve excavation area to just below the required concrete collar height. Once cured, placement of concrete collar and/or HMA paving operations may progress.
Existing Streets
Longitudinal trenches for dry utilities (CATV, telephone, gas, electric, traffic signal and signal interconnect cable) shall be excavated 6 inches clear from the gutter lip.
Following the patching of the trench with asphalt concrete, the street surface shall be CLSM sealed from the gutter lip to the edge of the bike lane stripe (usually 4 feet wide). If the bike lane stripe is obliterated in any manner by the construction process, it shall be replaced with thermoplastic per these Standards. If the dry utility trench impacts the travel line due to crossings the street surface shall be CLSM sealed from the gutter lip to the edge of the travel lane.
Jetting
Compaction of trench backfill by jetting methods is NOT allowed in City right-of-way areas or over dedicated storm, sewer or water easements or mains. Jetting of joint utility trenches behind the right-of-way and within public Utility easements may be allowed under specific conditions and upon the written approval of the City’s Construction Inspector and the Geotechnical Engineer.
Material
Material for backfilled trenches shall contain no organic material and no rocks or soil lumps exceeding 4 inches in diameter with the following qualifications:
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• Cobbles in the initial backfill (the first 1 foot above the pipe bedding covering the pipe) shall be 3 inch maximum diameter.
• An exception to the 4 inch maximum diameter cobble is where cobbles exceed 4 inches in diameter and are predominant (as determined by the City’s Inspector and Geotechnical Engineer). In this condition, 8 inches in diameter is the maximum size cobble allowed.
• The maximum cobble size shall not be greater than that of the depth of the maximum compaction lift, for the type of equipment used.
CLSM cement backfill, controlled low-strength material or dry mix “Popcorn” may be used on a case-by-case basis. The Contractor shall submit a proposed design mix to the City Inspector for review and approval prior to placement.
Native soil shall not be used for bedding or backfilling of utility conduits or chases within the City right-of-way, but only select bedding materials as discussed in these Specifications and per the Standard Details.
Placement of Material
Equipment shall be a size and type satisfactory to the on-site geotechnical engineer and the City’s Inspector. Impact-type pavement breakers or compactors (hydro-hammers) shall not be used within 5 feet of the top of any type pipe. Material for mechanically compacted backfill shall be placed in horizontal lifts which, prior to compaction, shall not exceed the depths specified below for the type of equipment employed. Actual maximum lift depth will vary with soil conditions and compaction equipment. The Contractor shall consult with a geotechnical engineer to determine the appropriate maximum depths. The Contractor shall be responsible for verifying compaction requirements for each lift.
Typical Compaction Equipment and Maximum Lift Depths Achieved by Proper Compaction
Maximum lift depth of 4 inches, equipment type:
Portable, engine driven pneumatic type (wacker) Portable vibratory plate Maximum lift depth of 12 inches, equipment type:
Backhoe mounted sheep-foot Vibratory smooth wheeled roller Vibratory smooth wheel roller with pneumatic tires
Maximum lift depth of 18 inches, equipment type:
Impact, free-fall or stomping equipment (hydro-hammer)
Pipe Bedding References
See Standard Detail DR-09 for Storm Drain.
See Standard Detail W-15 for Water Main.
See Standard Detail W-16 for Water Services.
See Standard Detail SS-05 for Sewer Main and Services (within ROW).
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Section 10 -Grading
10.1 General
This section specifies design, improvement requirements and plan submittal requirements of Grading Plans for private developments. It includes items pertinent for the City’s review and reflects established professional engineering practice for preparation of Grading Plans.
Questions and clarifications regarding this Section should be directed to the City Engineer.
Grading improvements shall include but are not limited to: excavation and embankment work for channels, pads and roadways, erosion control measures and retaining walls. These improvements shall be installed in accordance with the approved improvement plans, these Standards, the latest edition of the California Building Code, (CBC), the SWRCB Construction General Permit No. CAS000002, (WQ ORDER No. 99-08-DWQ), and the latest edition of the Caltrans Standard Specifications.
For properties which are not located within a specific plan area, the City’s authority for regulating grading is provided by Chapter 33 & 18 of the California Building Code (CBC). The CBC requires that a Grading Permit be obtained from the City prior to beginning any grading work unless the work meets certain exemptions specified in the CBC. This is necessary to ensure that on-site drainage adequately accommodated, off-site drainage is conveyed through the project, the proposed grading is compatible with adjacent property topography and adequate erosion and sedimentation control measures are addressed.
Two types of Grading Plans are reviewed by the City: Finished Grading Plans and Rough Grading Plans.
Finished Grading Plans shall be submitted as part of the Improvement Plans for a project.
Finished grading requirements are specified in Section 10.4.
Rough Grading Plans are submitted separately from and may be accepted prior to Improvement Plans. The plans should detail only the preliminary grading of a site. The design shall not allow for construction of any improvements (storm drains, streets, curbs, gutters, etc.) and shall indicate positive drainage flow except in those instances provided on the plans for erosion and/or sedimentation control. Rough grading requirements shall be as specified in Section 10.5.
10.2 Fees and Bonds
Plan review and permit fees for grading shall be in accordance with Chapter 33 of the California Building Code (latest edition as adopted by the City). 50% of the plan review fees will be required at the time of submittal. The amount of the bond shall be equivalent to 10% of the cost of the grading and all erosion and sediment control measures, but not less than $500.00.
10.3 Plan Preparation
All Grading Plans shall be prepared by or under the direction of a Registered Civil Engineer. All Sheets shall be stamped and signed by a Registered Civil Engineer licensed in the State of California.
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10.4 Finished Grading Plan Requirements
Grading Plans for all developments shall be submitted as part of the Improvement Plans and shall detail the following minimum requirements:
• Slope symbols for all slopes 4:1 or steeper.
• Typical lot grading details.
• Proposed spot and/or pad elevations. All lot corner elevations shall be shown on the Grading Plan.
• Flow directional arrows both on-site and off-site and perimeter elevation at the property line.
• Existing spot elevations and contour lines on-site and off-site around the perimeter of the development. Contour lines shall be shown in increments of one (1) foot. The spot elevations or contour lines shall be extended off-site for a minimum distance of 50 feet. • Existing trees (variety, size and elevation at the base of all trees six (6) inches in diameter or larger).
• A Certificate of Compliance of Grading with signature blocks for both the Registered Civil Engineer and the Geotechnical Engineer licensed in the State of California shall be provided stating the following:
CERTIFICATE OF COMPLIANCE
I hereby certify that the grades shown on these plans and approved by the Development Services Department have been constructed to within 1/10 of one (1) foot of their indicated elevation for all lot pads and improvements shown.
Project Engineer PE Number Date
I hereby certify that the pads for the following lots for this project have been tested for compaction in accordance with generally accepted test methods and based upon the results of these tests the compaction of said pads conforms to the recommendations of this project’s geotechnical report:
Lots:
I also state that our firm observed the grading operation to a sufficient extent to evaluate conformance with the project’s geotechnical report as approved by the City, and further state that based upon our observations, the grading for this subdivision conforms with the recommendations of said soil report. -
Geotechnical Engineer PE Number Date
• Back of sidewalk elevations at property lines, curb returns, high and low points, and other areas deemed necessary by the City Engineer.
• All existing and proposed surface and subsurface drainage facilities including drain inlets, underground pipes, surface swales, and any other drainage improvement proposed to be constructed with, or as a part of, the proposed work.
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• Location of existing and proposed buildings or structures on the site, including proposed pad and/or finished floor elevation. Proposed residential plot plans should not be shown on the Grading Plans.
• Location of existing and proposed buildings or structures on the land of adjacent owners which are within 15 feet of the property and which may be impacted by the proposed grading operations.
• Location of all existing and proposed retaining walls. • Typical sections across side yard property lines where the difference in finish pad elevations exceeds 1 foot.
• Names of adjacent subdivisions.
• Off-site intersecting property lines.
• For all projects involving the export of soil material:
• Location of spoiled disposal. If spoil area is within the City, a separate Conditional Use Permit is required for that site.
• Spoil areas shall meet all the requirements of these standards. • Silt retention and erosion control details as necessary and specified in these Standards. • Location of temporary protective fencing for environmentally sensitive areas such as:
creeks, wetlands, vernal pools, perennial streams, and preserve areas.
10.5 Rough Grading Plan Requirements
Grading Plans for subdivisions and all developments located within the City shall conform to the same requirements as those specified for Finished Grading Plans excepting the following:
Improvements
Only existing improvements such as utilities, curbs, gutters, etc. shall be shown. Utilities and streets to be constructed with the Improvement Plans shall not be shown as part of the Rough Grading Plans.
Drainage
All rough plans shall provide for positive surface drainage flow except in those instances provided on the plans for erosion and/or sedimentation control.
10.6 Design Requirements
Boundary Grading
Special attention shall be given to grading adjacent to the exterior perimeter property line of a development. All adverse effects to off-site properties adjacent to new developments shall be kept to an absolute minimum. Fills and cuts adjacent to the exterior perimeter property line shall be designed in accordance with the following:
When grading along existing residential property, the grade should be, held equal to or lower than the existing property grades, unless otherwise approved by the City Engineer.
When grades are to be raised higher than existing adjacent residential lots, a masonry retaining wall shall be used, regardless of the difference in elevation. The wall shall be City of Gridley
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located as close to the property line as is feasible for construction. If permission can be obtained from the adjacent property owner(s), the wall should be placed on the property line or onto the lower lot and the fence relocated to the top of the wall.
If possible, all exterior slopes, fill or cut, shall be constructed off- site, with the property line being situated a minimum of 2 feet inside the higher elevation. If a right of entry cannot be obtained, a retaining wall shall be placed as near to the property line as practicable.
A recorded notarized right of entry shall be required for all off-site fills and grading prior to plan approval.
Fill slopes adjacent to designated open spaces shall have a maximum slope of 3:1.
Exceptions to this specification may be made where physical constraints restrict the use of 3:1 slopes, at the discretion of the City Engineer. The maximum slope of all other boundary grading shall be 2:1 or as specified by the Geotechnical Engineer.
All slopes steeper than 4:1 adjacent to the public right-of-way and private streets shall be protected with permanent erosion control measures.
All fill material shall achieve 90% relative compaction certified by a Registered Geotechnical Engineer.
When a drainage swale or ditch is proposed to run adjacent to the property line, a level area, minimum width of 5 feet is required between the property line and the top of the slope bank.
A specific haul route shall be approved by the City Engineer when a large quantity of imported or exported soil is required. Where a haul route has not been determined at the time of plan approval, the permit shall be conditioned stating that no grading activities shall occur until a haul route has been approved by the City Engineer.
Interior Grading
Differences in elevations across interior property lines within a development, such that slopes or retaining walls are required, shall conform to the following:
Cross lot drainage is not allowed unless specifically approved by the City Engineer for tree preservation. All single-family residential lots shall have grading as per the Standard Details unless approved otherwise by the City Engineer. When a grading plan is proposed as part of a tentative map application for a single-family residential subdivision, the tentative grading plan showing rear lot drains shall be supplemented with an alternative plan showing the effect on the subdivision if rear lot drains are not utilized.
Retaining Walls shall be required whenever adjacent side lot elevations differ by more than ½ foot. In such cases, a minimum 3 foot wide walk path shall be maintained adjacent to all side property lines. Where the Consulting Engineer feels that this path will be maintained without the use of a retaining wall, application for a waiver may be made by preparing and submitting a site plan scale on 8-1/2 x 11 inch reproducible paper for each lot which is requested to be exempted, or by submitting a standard Lot Grading and Setback Guarantee.
The Lot Grading and Setback Guarantee shall specify which lots for which a waiver of the retaining wall requirement is requested, shall state the minimum setback of the proposed structure from the toe of slope, and shall state that should the minimum setback not be possible during construction, a retaining wall shall be constructed to the requirements of these Standards. Upon approval, a copy of these will be given to the Building Division to City of Gridley
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utilize in their review. Any deviation from these plans will be subject to approval by the Engineering Division.
Property lines shall be situated a minimum of 1.0 foot inside the top of fill or cut slopes when pad elevations differ by 1/2 foot or less. When retaining walls are used, the property lines shall be situated on the high side of the retaining wall with a minimum setback of 1.0 foot from the property line to the retaining wall. Where pad elevations differ by more than 1/2 foot and waiver of placement of retaining walls is required per the requirements stated above, property lines shall be situated a minimum of 2.0 feet inside the top of fill or cut slopes.
The maximum earth slopes allowed shall be 2:1 (horizontal to vertical). Minimum asphalt concrete surface slopes shall be 1% and minimum concrete cement surface slopes shall be
0.25%. All proposed slopes that are 3:1 or steeper shall be shown on the plans by some type of slope symbol delineation.
Lots on the low side of streets at sag points shall have pad elevations a minimum of 1 foot above the 100 year water surface elevation assuming failure of all subsurface drainage systems.
Retaining Walls
Retaining walls, when required, shall be shown on the plans and shall include all necessary information and details for construction. All retaining walls adjacent to the public right-ofway or along the exterior boundary of the project shall be masonry. All walls higher than 3 feet as measured from base of foundation to top of wall shall be substantiated with structural calculations stamped by a Registered Civil Engineer licensed in the State of California and a Building Permit shall be obtained from the Building Division.
Stormwater Pollution Prevention Plan (SWPPP)
A site specific SWPPP shall be submitted concurrently with the Improvement and/or Grading Plans when a project disturbs land. For information concerning the preparation of a SWPPP, the Consulting Engineer should refer to the County of Butte’s Strom Water Program, and the California Stormwater Quality Association (CASQA). “Stormwater BMP Handbook / Construction”, and the State of California NPDES General Permit for Storm Water Discharges Associated with Construction and Land Disturbance Activities.
The submitted SWPPP shall match identically to that of the SWPPP submitted to the State Water Resources Control Board via their electronic SMART system, up until the time improvement plans are approved, encroachment and/or grading permits are issued, and construction commences.
SWPPPs are not required for projects under one acre, unless they are part of a larger development encompassing over one acre. For projects less than one-acre, an erosion and sediment control plan shall be submitted with the improvement plans to the City for approval. This is generally part of the Grading Plan for the development. The City will accept the erosion and sediment control plan upon review of the project. All erosion and sediment control devices shall be identified and implemented in the same fashion as projects with SWPPPs over one acre. Enforcement will be conducted similarly, with the exception to SWPPP administrative requirements.
SWPPP Site Plan Requirements - SWPPP site plan(s) shall be submitted along with other SWPPP State permit required documents.
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The discharger shall ensure that the SWPPP for the project site is developed and amended or revised by a Qualified SWPPP Developer (QSD). The SWPPP shall be designed to address the following:
• All pollutants and their sources, including sources of sediment associated with construction, construction site erosion and all other activities associated with construction activity are controlled.
• All non-storm water discharges are identified, and a description of how they will be either eliminated, controlled, or treated.
• Site BMP’s are effective and result in the reduction or elimination of pollutants in storm water discharges and authorized non-storm water discharges from construction activity to the BAT/BCT standard.
• Calculations and design details as well as BMP controls for site run-on are complete and correct.
• Stabilization BMP’s are installed to reduce or eliminate pollutants after construction is completed.
• Phasing of Erosion Control Measures - The City Engineer may require phasing of the SWPPP plan(s) to ensure that all necessary erosion control measures are taken during separate phases of construction. As an example, this may require the Developer to construct sediment traps and basins during the first phase of grading operation.
• To demonstrate compliance with requirements of the SWPPP, the QSD shall include information in the SWPPP that supports the rational used in selecting BMP’s including supporting soil loss calculations, if necessary, conclusions, selections, use, and maintenance of BMP’s
• The discharger shall make the SWPPP available at the construction site during working hours while construction is occurring and shall be made available upon request by State or City inspectors. When the original SWPPP is retained by a crew member in a construction vehicle and is not currently at the construction site, current copies of the BMP’s and map/drawing will be left with the field crew and the original SWPPP shall be made available via request by radio/telephone.
SWPPP Control Measures Requirements- The following is a list of requirements for erosion and sediment control measures, also referred to as BMPs (Best Management Practices). The following erosion and sediment control requirements shall be part of site specific SWPPPs. • All sediment control measures (drain inlet protection, perimeter protection, stabilized construction access, etc.) shall be implemented prior to the commencement of grading operations or other construction activities or as approved by the City Engineer. Grading during the wet season should be minimized. • An adequate supply of erosion and sediment control materials (fiber rolls, blankets, mats, straw bales, silt fencing, etc.) shall be stored onsite throughout the course of construction and made available for maintenance and repair work.
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• Straw, when used, shall be broadcast, or hand distributed, at a rate of 4000 pounds per acre. Straw shall be anchored to soil surface by “punching”, “pressing”, or by using a tackifier.
• Slopes steeper than 4:1 and adjacent to the City right-of-way, flood plains, natural drainages, park land or designated open space shall be broadcast seeded and covered with a blanket material grade appropriate to the steepness and length of the slope. Alternative methods shall be approved by the City Engineer. • All areas of disturbed soil, regardless of slope, shall be protected for erosion control.
For measures approved by the City for erosion control, see Butte County’s Storm Water Program, and the State of California NPDES General Permit for Storm Water Discharges Associated with Construction and Land Disturbance Activities.
Mitigation monitoring Requirement
All mitigation measures and mitigation monitoring measures as required to mitigate environmental impacts shall be complied with. The Developer is responsible for monitoring all mitigation measures and shall submit to the Planning Department a letter certifying compliance with such measures.
Certifying Pad Elevations
Upon completion of the grading and prior to acceptance of the subdivision improvements or issuance of building permits by the City, the Consulting Engineer shall verify the final pad elevations. The elevations shall be verified at the center and the corners of each pad. Pad grades shall be certified to an accuracy of 0.10 feet.
A signature block, certifying that final graded elevations in the field are the same as those shown on the plans, shall be included on the grading plans. The Consulting Engineer shall sign the signature block, certifying to the above, record (as-built) Grading Plans to the City Engineer
Maintenance of Access to Utility Facilities
Continuous, suitable access shall be maintained during all stages of construction to any facility owned or operated by a utility/district providing essential services (i.e. sanitary sewer, water, drainage, electricity, gas, telephone, etc.).
10.7 Installation
All grading improvements shall be installed in accordance with provisions in Chapter 33 of the UBC, recommendations of site-specific geotechnical reports and geotechnical engineering, provisions in the Caltrans Standard Specifications, the approved improvement plans, and per these standards
Channels
All fill areas in channels shall receive suitable fill material to be compacted to a minimum of 90% relative compaction. The Developer’s geotechnical engineer will determine suitable fill material. Unsuitable materials shall be removed from the channel and replaced with suitable backfill material based on recommendations provided by a State of California licensed geotechnical engineer.
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Erosion Control Measures
Construction sites shall have required erosion and sediment control measures in place between October 1 and April 30. All projects shall have adequate sediment control measures in place prior to ground disturbance regardless of time of year. If construction is in progress, the Contractor shall ensure that the construction site is prepared prior to the onset of any storm. For Stormwater quality compliance information, refer to the California Stormwater Quality Association (CASQA). “Stormwater BMP Handbook / Construction”, latest edition. Water ways under the jurisdiction of governmental agencies other than the City may be subject additional erosion control measures or criteria and is the responsibility of the Developer/Owner.
All bare areas, regardless of slope, within 50 feet of natural drainages and active stormwater collection systems shall be covered with straw, erosion control blankets, hydromulch, or other types of soil stabilizers suitable for elimination soil migration. A City Stormwater Inspector may require additional control measures be installed if deemed necessary.
Roadways
Compaction - Relative compaction of not less than 95% shall be obtained for a minimum depth of 0.5 feet below the subgrade grading plane for the width between the outer edges of shoulder, including curb and gutter areas, whether in excavation, embankment or at original ground level. All other material shall be compacted to a relative compaction of 90%.
Grade Control - When the next layer to be placed on the subgrade is an asphalt concrete pavement, asphalt concrete base or asphalt concrete subbase, the subgrade grading plane at any point shall not vary more than 0.05 foot above or below the grade established by the project surveyor.
Stability Testing - The Contractor shall proof roll the subgrade areas with a fully loaded, 3,000 gallon water truck prior to placement of aggregate base or aggregate subbase. The City’s Inspector shall approve the equipment used for proof rolling.
Unsuitable Materials - Any unsuitable material encountered within two (2) feet below subgrade or two (2) feet below original ground shall be removed and replaced with a suitable backfill material. Suitable backfill materials and methods for placement are to be reviewed and approved by the on-site geotechnical engineer. Other methods for subgrade stability may be used upon review and approval of the Developer’s geotechnical engineer.
10.8 Soil Testing Procedures and Frequencies
Field Testing
Field Density Testing - Field density test for earthwork and backfill will be performed by either the owner’s Independent Testing Laboratory (ITL), or the City’s Geotechnical Engineering Consultant, at the discretion of the City Engineer as follows:
Private property building areas including 10 feet outside the exterior building lines shall be tested by the property owner’s Geotechnical Engineer with proper written pad certifications submitted to City Building Official prior to foundation placement.
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Public Right-of-Way - All grading operations, which involve revision to existing contours for the purpose of accepting right-of-way improvements, shall require written and stamped certification from a licensed California Geotechnical Engineer.
Test Method-In-place nuclear density, ASTM D2922 (Method B-Direct Transmission) to check conformance to requirements of Geotechnical Report, project plans, specifications, and of these Standards. In addition to testing, the field technicians shall observe ALL backfill operations to ensure methods consistent with those that achieved minimum required compaction results are used throughout the backfill process. The field technician shall record these observations in the Daily Field Reports (DFR’s). The field technician shall perform additional testing when the operations deviate from proven practices even if testing at the frequencies required below has already been performed. Samples for compaction curves shall be taken at the discretion of the technician or as directed by the City’s field representative.
The City expects testing at a higher frequency at the discretion of the field technician or City’s Inspector if there is any reason to doubt the effectiveness of the operations or the precision of the test results, and when a material change is observed in the soil being compacted. These tests shall be recorded in the DFR.
Minimum Reporting Requirements
Daily Field Reports (DRF) - All testing and observations shall be recorded in a DFR. The DFR shall include all field density testing; test tables and/or plans shall show the field-recorded dry density, moisture content, reference laboratory compaction test used, and any moisture offset used based on supplemental laboratory testing. All test results indicating less than minimum compaction shall be recorded in the DFR’s along with the observation of corrective operations and retest results. DFR’s shall also indicate where observation and soil probing was performed in between nuclear gauge testing.
Mass Grading Testing Frequencies
Large Area Density Testing – One test per 1,000 to 2,000 cubic yards. A separate compaction certification report is required for City right-of-way limits.
Small Area Density Testing – One test per 500 cubic yards or each 10,000 square feet of fill.
Trench Backfill Testing Frequencies
Utility Installations - Observe all bedding, shading, shovel slicing, and filter fabric installation procedures for compliance with City Standards and project plans and specifications. Observations shall be documented in DFR’s along with measures taken to correct noncompliant items.
Compaction Testing – Compaction Testing shall conform to Caltrans standards for frequencies and type.
Performance Specification Observation - Performance specifications shall be used in deep trenches or where rocky material is present to verify compaction efforts where vertical cuts or other issues prevent safe entry for nuclear gage density testing. A series of tests will be performed at the beginning of the backfill operations in a protected area of the trench to determine the minimum number of passes, acceptable equipment, moisture conditions, and maximum loose lift thickness. Once the procedure is approved, full-time observation will be performed to check that operations comply with the approved City of Gridley
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performance specifications. The field technician shall require the contractor to provide access for further testing by the field technician if, in the opinion of the City’s Inspector, conditions change such that observation alone will not suffice to verify compliance or if the material or equipment used to backfill the trench changes such that re- evaluation or compaction procedures is required. Adequate compaction of material containing more than 30% rock larger than ¾ inch shall be verified via performance specifications. The ITL shall develop the performance specification and, if none exists, perform full-time observation of the operations to verify compliance. Field observations shall be recorded in the field technician’s DFR’s as described above. The DFR shall clearly reference approximate stations and elevations over which the observation of performance specification was performed.
Dry Utility Trenches - Installation of Electric Department facilities shall be according to the Gridley Electrical Department.
Manholes -Areas around manholes shall be tested every vertical foot. Testing methods and recordings shall be as described above.
Utility Services to Residences - Test at least every other lift on a minimum of 50% of the services.
10.9 Materials
Retaining Walls
Concrete/Masonry/Rock Walls - All concrete, masonry, or rock walls shall conform to materials and specifications provided by the wall manufacturer or designing engineer.
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Domestic Water
11.1 General
These improvement standards shall govern the engineering design and construction of all domestic water systems intended for operation and maintenance by the City of Gridley.
All work shall be installed in accordance with the requirements of the American Water Works Association (AWWA), these Standards, the California Building Code, the California Plumbing Code and as recommended by the manufacturer. These Standards and manufacturer’s guidelines shall always be present at the construction site.
11.2 Connection to Existing Facilities
Connections to existing City water facilities shall be made after approval by the City Engineer and all permits have been issued.
All work related to the connection shall be done by the Contractor with full-time inspection by the City or a contracted City inspector. A gate valve shall be provided at the point of connection to isolate new water mains from the existing system. New water facilities shall remain isolated from the existing system source water using a backflow preventer tested in place until the connection is approved.
Hot tap connections may be allowed if approved by the City Engineer. Hot tap connections will not be allowed on existing steel pipelines, nor when the diameter of the service line is equal to or greater than the diameter of the main. If hot tapping is approved by the City Engineer, the Contractor shall have the tapping sleeve and valve fully installed, thrust blocked or fully restrained, supported and approved by the City prior to making the hot tap, and the tap shall be the full nominal diameter of the tapping sleeve and valve.
The Contractor shall tie into the new system or to an existing stub under the following conditions:
1. With specific approval of the City.
2. Care shall be taken to provide a clean, sanitary tie in site.
3. Dewatering of both the new and existing water mains shall take place in a way as to prevent contamination by trench water.
4. All materials used in the tie in shall be clean, new, and swabbed with chlorine to the satisfaction of the City Inspector.
5. All tie ins shall take place in the presence of the City Inspector. City inspector shall be notified no later than 48 hours prior to the start of work.
6. Notify customers of pending service outages 24 hours in advance using door hangers approved by the Public Works Director.
7. Tie ins may take place only after the newly constructed water system has successfully passed all required testing procedures as established in these Standards or Standard Details as determined by the City Engineer.
8. Under no circumstances shall anyone other than a representative of the City open or close valves in a City operated system, unless approved by the City Engineer.
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Construction Staking
The water main shall be staked prior to excavation. Staking shall provide the station and the offset to the water main, as well as the cut to the nearest 0.1 foot. Stakes shall be provided at a minimum of every 100 feet in tangent sections, every 25 feet in curved sections, and every 10 feet in approved vertical curve sections, and at all valves and appurtenances.
Cross Connection Control on Fire Sprinkler Systems
According to the California Health and Safety Code Section 13114.7, no backflow prevention devices other than those specified in the Standards of the National Fire Protection Association (NFPA) may be required for Class I and II fire sprinkler systems. Class I automatic fire sprinkler systems are those systems supplied by public water mains only (i.e., no pumps, tanks or reservoirs, physical connection from other water supplies, and no anti-freeze or other additives of any kind).
Class II systems are the same except that booster pumps, whose sole source of supply is the public water system, may be installed in the connection from the street main.
Automatic fire sprinkler systems which have cross-connections to unapproved sources of water, in addition to being connected to the public water mains, shall have backflow protection as required by American Water Works Association M-14 for Class III, IV, V, and VI fire systems.
All automatic fire sprinkler systems shall be installed in accordance with provisions of National Fire Protection Association (NFPA) 13, "Installation of Sprinkler Systems". All systems shall have a fire department connection as required by NFPA #13, unless waived by the Fire Chief. All Class I and II automatic fire sprinkler systems, as with all fire extinguishing systems, shall be serviced and maintained on a regular basis in accordance with the provisions of Chapter 1.8 (starting with Section 13195) of Part 2 of Division 12 of the California Health and Safety Code.
In accordance with NFPA 13, each automatic fire sprinkler system shall have an alarm check valve, or equivalent, which is listed and approved for fire system use. Each fire department connection shall have a listed double detector check valve as required by NFPA 13. Further, the fire department connection shall be attached to the sprinkler system above the alarm check valve assembly and not on the supply side. Class I and II systems connected to public mains only do not require double backflow protection devices. Since Class I and II systems are located on public water mains and fire hydrants, the public mains shall be used for supplementary water except in cases of extreme emergency situations where a fire progresses beyond the design criteria of the system and additional water, either in volume or pressure, is required to control the fire situation.
When such added water is needed, it shall be taken from fire hydrants on the public mains through the appropriate fire department pumper and hose lines. The connection shall not be used to pump water from any source other than the public water system.
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11.3 Design Criteria
These criteria shall apply to the engineering design of all water systems intended for operation and maintenance by the City. The intent of these criteria is to provide a water system that will dependably and safely convey high quality water throughout the distribution system.
All work shall comply with the pertinent and current requirements of the following agencies.
1. United States Environmental Protection Agency (EPA) Drinking Water Regulations.
2. Laws and Standards of the State of California, Department of Public Health Services relating to Domestic Water Supply.
3. Title 17, Chapter V, Sections 7583-7622, California Administrative Code regarding crossconnections and backflow prevention
4. Latest Edition of the American Water Works Association (AWWA) Standards.
5. Gridley Fire Code
In the case of conflicting design criteria, the requirements of these standards shall take precedence.
11.4 Water Supply Quality and Pressure
The quality of water supplied to the system shall conform to the Environmental Protection Agency Drinking Water Act, and the State Department of Health Services Drinking Water Standards.
Normal operating pressures of not less than 50 PSI nor more than 75 PSI shall be maintained at service connections to the system, except that during periods of peak domestic and fire demand, the pressure shall not be less than 20 PSI.
11.5 Flow Determination
Determination of flow volumes required for a specific land use category shall consider maximum day domestic demands occurring in conjunction with an emergency fire flow demand. For design of the distribution system, the following unit demand factors shall be assumed.
Factors assume a 30% Floor Area Ratio (FAR). 50% FAR for senior living.
Table 11-1 Flow Determination
Land Use Category
Average Day unit
Demand Factors
Very Low Density Residential (0.5-3 DU/AC) 728 gpd/DU
Low Density Residential (2-4 DU/AC) 600 gpd/DU
Medium Density Residential (5-8 DU/AC) 478 gpd/DU
High Density Residential 1 (9-15 DU/AC) 306 gpd/DU
High Density Residential 2 (15-30 DU/AC) 177 gpd/DU
Agricultural 2,000 gpd/AC
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Land Use Category Average Day unit
Demand Factors
Agricultural Industrial 2,598 gpd/AC
Industrial 2,562 gpd/AC
Commercial 2,598 gpd/AC
Neighborhood Center Mixed Use 2,598 gpd/AC
Open Space -
Park 2,988 gpd/AC
Public 1,780 gpd/AC
Elementary School 3,454 gpd/AC
High Schools 4,068 gpd/AC
Railroad Yard 109 gpd/AC
Peaking Factors
The average day demand to maximum day demand peaking factor shall be 2.0. The maximum day demand to peak hour demand peaking factor shall be 1.7 (3.4 average day to peak hour).
Required Fire Flows
For areas of the general type noted below, the indicated water supply for fire flows shall be provided with the initial development. Expansion or changing in zoning of the development shall be subject to the requirements of the California Fire Code (CFC) as adopted by the City.
Residential Areas
Single family homes equipped with automatic fire sprinklers systems shall require a 1-inch minimum water service and meter. The minimum 1-inch water line shall start from the public main to the required water meter.
Multi-Family Areas
For attached multi-family units, the fire flow shall be determined by the Gridley Fire Department (GFD). The maximum fire flow however shall not exceed 4,000 gpm provided the building is fully sprinklered in accordance with the CFC as adopted by the City. For buildings that are not sprinklered, contact the GFD.
11.6 Water System Design
Standard distribution main sizes are 6, 8, and 12 inches in diameter. Sizes of mains shall be such that the stated normal pressures, and the minimum requirements for main spacing, specified below, are maintained. The distribution system shall be designed in grid form to provide equalized pressures throughout the system equalized under varying rates and location of demand. The minimum pressures and flows specified in these standards shall govern the design.
The following shall be considered during system design:
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Hydraulic Analysis
A network hydraulic analysis shall be provided to the Public Works Department upon request. The hydraulic analysis submittal shall include two copies of the following items:
1. The data input files, as well as the analysis results in electronic format.
2. Information on the proposed development (e.g. type of development, number of acres, number of units, fire flow requirements, etc.).
3. Data sheets outlining all assumptions (e.g. method used to assign demands to corresponding junction nodes and source HGL’s used).
4. Map identifying pipe and node numbers and their locations.
5. Fire hydrant locations.
6. The name and version of software used for the analysis.
7. Elevations of junction and source nodes. The elevations used in the network hydraulic analysis shall be based on a project grading plan or the anticipated final elevations. If the final grading plan deviates significantly from the elevations used in the analysis, a revised analysis will be required.
8. Staging or phasing of the development.
9. Appropriate off-site demands.
10. The Hazen -Williams formula shall be used in the analysis of the system.
Pipe Size and Materials
For transmission lines between wells the minimum pipe size is 10 inches. Standard distribution main sizes are 6, 8, and 12 inches in diameter as stated above. For looped mains and interconnections, the minimum pipe size is 6 inches.
Pipe materials for mains shall be ductile iron pipe or C-900 PVC pipe with cast iron dimensions.
Cover
A minimum cover of 36 inches and a maximum cover of 60 inches shall be maintained as measured from the outside bell of the pipe to the pavement or final grade, unless approved by the City Engineer.
Stubs
Stubs for future developments shall be a minimum of 18 feet fully restrained ductile iron pipe, originating from the water main.
Water Main Location
If it is necessary to install a water main outside of the public right-of-way, an easement dedication to the City shall be required. Water mains shall be located within a minimum 20- foot-wide easement and shall be offset within the easement such that the centerline of the water main is located approximately 5 feet from one side of the easement and 15 feet from the opposite side, unless otherwise approved by the City Engineer. Easements shall be located completely on one side of a property line or fence. Dedicated easements shall be City of Gridley
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clear of all permanent structures, building eaves, roof lines and the future trunks of large tree species. Temporary construction easements of adequate size shall also be provided. The easement width shall be a minimum of 20 feet. Dead End mains shall be eliminated wherever possible by looping the system. Blow-offs conforming to these standards shall be installed at all permanent or temporary dead-end mains.
Minimum Separation Requirements
Water mains shall maintain separation from all sanitary sewers and recycled water mains per the most current state water code on vertical and horizontal separation. (Title 22, Chapter 16, Section 64572)
Key Requirements for Water Main Separation (CCR §64572):
1. Horizontal Separation: New water mains must be at least 10 feet away from parallel sewage or hazardous fluid pipelines.
2. Vertical Separation: Water mains must be installed at least 1 foot above sewer pipelines when parallel.
3. Crossing: When crossing, water mains must be at least 1 foot above the sewage pipe.
4. Recycled Water: For disinfected tertiary recycled water or storm drains, the requirement is a minimum of four (4) feet horizontally and one (1) foot vertically above the pipe.
5. Exceptions: If 10-foot horizontal/1-foot vertical separation is not possible, the water main must be encased or the alternative design must be approved by the State Water Resources Control Board.
All other utilities shall maintain a minimum 5-foot separation sidewall of pipe to sidewall of pipe.
Vertical Elevation Changes
Mains designed with a vertical elevation change using angle fittings use a segment of ductile iron pipe with an approved restraint system between the two fittings. All water mains shall be fully restrained for the length required by the pipe diameter, type of pipe used, trench and bedding classification. Thrust blocks shall only be used if approved by the City Engineer.
High and low points (exceeding 2 pipe diameters) shall be addressed with blow offs or ARV’s as appropriate.
Warranty Inspection of Water Main Stubs
As a requirement, water stubs are provided to subdivisions as a courtesy by developers during the construction of backbone infrastructures in streets to prevent cutting up the newly paved streets when the subdivisions are ready to develop. These stubs become an integral part of the water system and subsequently the responsibility of the developers of the subdivision and are therefore imperiled to both construction and warranty inspections.
This practice saves future developers’ construction time and cost that would have otherwise been spent on tie-ins and street repairs and in some instances prevents delays in the event a street has a moratorium. Since these stubs are provided at no cost to future developers, it is our policy, that it is the responsibility of the contractors to test and repair these stubs, if found damaged, prior to tie-ins. A note of this effect shall be placed on the improvement plans.
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11.7 Valves
Sufficient valves shall be provided on water mains to minimize customer service interruptions and sanitary hazards during repairs and future development or at a maximum of 500 feet from the nearest valve.
Location
Valves will generally be located as follows. No single shut down will result in shutting down a transmission main. Valves will be installed at minimum intervals of 500 feet in school, commercial, industrial, or multi-family residential developments.
In residential areas, valves shall be spaced such that no single shutdown will result in shutting off water to more than 20 services or 800 feet of water main whichever comes first.
Valves shall be located such that any section of main can be shut down without going to more than 3 valves to shut down the main section. All tees shall have a minimum of 2 valves. All crosses shall have a minimum of 3 valves.
Commercial services 6 inches and greater shall have a valve on each branch of the tee for a total of 2 valves.
Valves should not be located in; gutters, valley gutters, or driveways. A valve shall be installed on each side of a creek, canal, bridge, major highway or as required by the City Engineer.
A gate valve shall be installed at the point of connection when connecting a new water main to the existing water system.
Removal and Abandonment
Any valve outlet installed prior to lot development and subsequently not required shall be removed in its entirety. If removal is not practical, the valve shall be abandoned in the closed position and the lateral shall be cut, capped, and finished with an adequate thrust block. The lid shall be welded shut and painted red. The following note shall appear on the construction drawing:
The Contractor shall cut the existing pipe where shown on the drawing and install a restrained cap complete with thrust block. Where a joint or coupling in the existing pipe is uncovered at the cut and cap locations, the installation of a plug may be permitted with approval from the City Engineer.
Valve Extension Stems
Valve extension stems are required where the distance from the top of the valve box to the top of the operation nut exceeds 40 inches. The valve extension stem shall be a minimum of 24 inches long and shall be within 24 inches of the surface.
Air Relief/ Vacuum Valves
In the absence of services to relieve air trapped in high points of the water main, air relief or air vacuum relief valves are required on pipeline high points as directed by City Engineer.
11.8 Hydrant and Blow Offs
Location
Hydrants and blow-offs shall adhere to the following criteria:
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1. Fire hydrants shall be placed at street intersections wherever possible. Hydrants located at intersections shall be installed at the curb return on the same side of the water main connection.
2. Fire hydrants and blow-offs not located at intersections shall be installed on property lines between lots.
3. Not more than three hydrants shall be installed on an 8-inch main between intersecting 12-inch mains. The pipeline connecting the hydrant and the main shall be a minimum of 6 inches, with a flanged gate valve connected to the main.
4. A blow-off assembly shall be installed on all permanent and temporary dead-end runs. A 2-inch blow-off shall be used on mains 12 inches and smaller. A 6-inch blow-off shall be used on mains 16 inches and larger. In no case shall the location be such that there is a possibility of back- siphonage into the distribution system.
5. Blow-off assemblies shall be located at low points along mains.
6. Hydrants, valves and buries shall be installed per the standard details.
Spacing
Fire hydrants and blow-offs shall have a maximum spacing of 500 feet measured along the street frontage in residential areas and a maximum spacing of 350 feet in all other areas.
Where new water mains are extended along streets where hydrants are not needed for protection of buildings or similar fire problems, fire hydrants shall be provided at spacing not to exceed 1,000 feet to provide for transportation hazards.
Hydrant valves shall be placed at the tee on the main.
Cul-de-sacs and Dead-End Streets
Hydrants shall be required within a cul-de-sac or dead-end street measuring more than 250 feet as measured from the curb return of the intersecting street and the end of the bulb or street. A minimum 8-inch water main shall extend up to the hydrant tee.
11.9 Water Services
Water services shall be installed at the time the water main is constructed. Service stubs 2 inches and smaller shall be polyethylene (CTS). Service stubs 3 inches and larger shall be fully restrained ductile iron pipes. Services from mains installed in private roads shall be extended 1- foot beyond the edge of pavement. Water services shall also conform to the following requirements.
Location
The building service shall be located to provide the most direct connection to the main.
Every effort shall be made to pair services. Single and double residential water services shall be installed on lot/property lines.
The curb shall be stamped with a “W” at all service locations.
Sizing
The standard size of a single-family residential service line shall be a minimum 1- inch service or as determined by the City Engineer. Schools, commercial, industrial, or a multi- City of Gridley
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family residential developments shall be provided with a larger service subject to approval by the City Engineer.
For service laterals 2 inches in diameter or smaller, service saddles shall be a minimum of 12 inches from the end of the main and 24 inches to any other service saddle or pipe joint.
Service Taps
The City reserves the right to make all water service taps onto existing mains upon application for a service tap and authorization for payment. Work by the City shall be performed on a time and materials basis. A note to this effect shall be placed on the plan sheet which shows a detail of the area that requires such tapping. The service tap application shall be made to the City a minimum of two weeks in advance of the time the tap is desired. All connection fees must be paid prior to the time of application. All excavation, backfill and the installation of the remainder of the water service shall be performed by the Contractor.
Water Meters
Water meters shall be installed on all water services. Meters shall be purchased through the City and installed by City forces upon plan approval and payment of the connection fees.
11.10 Water improvement Plan Requirements
Plans for the construction of water infrastructure, whether in conjunction with other improvements or for a water project only, shall conform to these standards, meet the following requirements.
Water Study
A water study or water master plan as determined by the City may be required prior to review of the water design if there is a possibility that adjacent areas might require service through the subject property.
General Requirements
Plans for the water improvement project shall include a layout sheet, plan and profile of each public water line, and necessary detail drawings.
Layout Sheet
Improvement plans shall include an overall map which shows the project boundaries, water mains, valves, services, and other important items of the work.
A parcel which benefits from and financially participates in a water construction project, but is not included within the project boundaries, shall have a note to this effect placed on the layout map and on the plan and profile sheet if the parcel appears thereon. Parcels which make use of those facilities may be subject to additional fees at the time of connection, if the participation has not been so noted.
11.11 Restraint
Joint restraint shall be achieved by means of a mechanical joint restraint device. Full pipe restraint shall be required within bridges, casings, dead end runs, temporary dead end runs, at all angle points, and as determined by the City. Restrained pipe within casings or bridges shall be fully extended or “stretched out” to remove the slack between the joints the entire length of the structure. A note shall be placed on the plans. Thrust blocks shall not be used unless specifically City of Gridley
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called out on the plan set and approved by the City. Restraint calculations shall be submitted with the plan review. Restraint calculation parameters are as follows: soil type ml, granular fill,
1.5 to 1 safety factor, trench type 4, and minimum test pressure of 150 psi.
11.12 Work Near Existing Mains
Existing transmission water mains shall be clearly shown on the plans. The plans shall have a caution note on the cover sheet, plan/profile sheets, and grading sheets where the main is shown as existing. The notes shall read as follows: CAUTION EXISTING (name size) WATER MAIN.
No construction shall be permitted within the water main easement without the presence of the City’s inspector. Prior to start of construction, 48-hour notice shall be given to the Public Works Department. Heavy equipment and vibratory equipment may cross designated segments of the water main with a minimum of 10 feet of cover or approved equivalent. The City shall inspect the condition of the existing main prior to paving. Request for inspection shall be made two weeks in advance.
11.13 Pipe Bedding
Pipe bedding shall conform to the standard details and the following.
Bedding shall provide uniform and continuous support along the barrel of the pipe. The minimum (6 inches for mains, 4 inches for service lines) depth of bedding material shall be provided under the bell. Blocking of the pipe is not permitted.
Loose material shall be removed from the trench bottom and replaced with imported material.
Where rocky, unyielding, or unsuitable foundation material is encountered, the subgrade shall be excavated a minimum of 12 inches below the pipe and the trench width shall be increased a minimum of 12 inches. The over-excavation shall be replaced with imported material.
Where the trench bottom is soft, yielding or unstable, the trench bottom shall be overexcavated. 3/4 inch crushed rock shall be placed in the trench to provide a stable foundation.
The rock is in addition to the required pipe bedding used in the pipe zone.
Bell holes shall be excavated per manufacturer’s recommendations. The minimum depth of bedding material shall be 6 inches for mains, 4 inches for service lines provided under the bell.
Care shall be taken to ensure that the bell hole is no larger than necessary to accomplish proper joint assembly.
11.14 Installation
Water pipe shall be installed in accordance with the following provisions:
The contractor shall keep the pipe interior free from foreign materials and in a clean and sanitary condition until acceptance by the City. At times when pipe laying is not in progress, the open pipe end shall be sealed with a watertight cap or plug to prevent foreign matter from entering the pipe. Provisions shall apply overnight.
Trenches shall be in a reasonably dry condition when pipe is laid. Care shall be taken when lowering pipe into the trench to protect the pipe from damage. Chains are not permitted. The pipe shall be laid carefully to the lines and grades shown without grade breaks, unless designed with such, or to minimum depths shown on the approved plans. If field conditions exist such City of Gridley
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that the pipe may not be laid to the specified grade, the approved plans will require revisions prior to proceeding with construction.
Pipe sections shall be closely jointed to form a smooth flowline. Care shall be taken in placing the pipe and making field joints.
No facility is to be backfilled without inspection by the City. Improvements installed without proper inspection shall be exposed and inspected as required by the City. All installations shall follow manufacturer’s recommendations unless otherwise noted on the approved plans. The manufacturer’s installation guide shall be on the job site at all times.
Pipes shall be fully restrained to the length specified in the approved plans, using materials specified herein.
Thrust blocks shall only be used where specifically shown on the plan/profile sheets and/or standard detail sheets. All fittings and appurtenances shall maintain a minimum of 18 feet of restrained pipe into the fitting from all directions. Plans should reflect the restraint lengths required for each segment and transition.
A continuous number 12 insulated tracing wire shall be attached to mains, service lines and appurtenances per these Standards, Details and the following:
1. Tracing wire shall be continuous between mainline valve boxes and fire hydrants. It shall be attached to the top of the pipe with 10-mil vinyl tape every 5 feet.
2. Tracing wires through valve boxes shall be placed outside of riser, but inside the box. (24 inches coiled)
3. Tracing wire in manholes and vaults shall be attached inside the facility within 1 foot of the rim.
4. Wire splices shall be located above ground and inside of valve boxes, per Details and as follows: Install a copper split bolt connector on the splice, twist the wire together with a minimum of 5 twists, solder all connections, and cover and splice with mastic tape and wrap with vinyl tape. A 12 inch wide, blue plastic non-detectable water pipe marking tape, marked “Buried Water Main Below,” shall be placed in all main line trenches. The detectable tape shall be installed between the aggregate base backfill and the bedding sand layers. The warning tape shall extend to the nearest valves located on each side of said intersection.
Mains in unpaved areas shall be marked every 150 lineal feet with a blue composite utility marker having a decal stating: “Caution Water Pipeline.” Appurtenances (valves, ARV’s, test stations, etc.) and angle points shall also be marked. Mains in landscaped areas shall be delineated with a brass marker set in an 8 inch concrete cylinder 4 inches above finished grade every 300 lineal feet. The brass marker shall state “City of Gridley Water Main.” All underground metal (ductile iron, valves, fittings, copper, brass, etc.) shall be wrapped in 10 mil minimum thickness polyethylene encasement with ends taped off with vinyl pipe wrap tape.
Polyvinyl Chloride (PVC) Pressure Pipe
PVC shall be installed in accordance with the AWWA Manual M23 and the manufacturer’s recommendations, except as otherwise provided herein:
1. PVC Pipe shall have been manufactured within the 18 month period prior to installation.
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2. Pipe and gaskets shall be kept clean and protected against sunlight and heat damage.
3. Pipe showing signs of physical damage or excessive ultraviolet exposure will be rejected and shall be immediately removed from the job site.
4. The pipe shall be installed with the manufacturing label showing on the top. Pipe segments shall be continuous of one manufacturer.
5. The reference mark or stab line on the spigot end must be flush with the bell end and visible for inspection
6. The beveled end of the pipe shall be cut off before placement into a mechanical joint.
7. Minimum length of pipe for installation shall be 5 feet.
Ductile Iron Pipe (DIP)
DIP shall be installed in accordance with the standards for “Installation of Ductile Iron Water Mains and Their Appurtenances” (ANSI/AWWA C-600) and the manufacturer’s recommendations, and as provided herein:
1. DIP shall be polyethylene encased in accordance with these Standards and the standard for “Polyethylene Encasement for Ductile-Iron Piping for Water and Other Liquids” (ANSI/AWWA C-105/A21.5).
2. At the direction of the City, the Contractor shall repair damages to the polyethylene encasement as described within ANSI/AWWA C-105/A21.5 or shall replace all damaged polyethylene film sections.
3. Metallic lines shall be exothermically welded and electrically continuous on DIP runs exceeding 100 feet or as approved by the City. Each joint shall have 2 individually welded wires. Exothermic welds shall be installed as follows:
• Weld only against bare metal adjacent to both bell and spigot ends of pipe. • Care must be taken not to remove excess metal when removing the pipe coating. • Correct horizontal molds must be used for pipe diameters from 4 to 24 inches in diameter. Pipes 30 inches and larger may use flat mold. • After a solid weld is made, coat the bare metal with an acceptable bituminous coating material and cover with exothermic weld cap.
• Corrosion test stations shall be installed on metallic lines at intervals not to exceed 1,000 lineal feet or as specified on the approved plans. • Minimum length of pipe for installation shall be 5 feet Ductile Iron Pipe Fittings
In addition to requirements set by these standards, fittings shall be constructed per the following requirements. Flanged and mechanical joint fitting bolt threads and nuts shall be coated with an approved bituminous material.
Transitions between DIP and PVC may be made by the use of a DIP repair sleeve or a PVC pipe spigot may be inserted into a DIP bell by cutting off the PVC bevel on the spigot and City of Gridley
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leaving no more than a ½ inch taper. The City’s inspector shall be present to witness this process.
11.15 Service Installation
Water services shall be installed in accordance with manufacturer’s recommendations, the Details and with the following provisions.
Services shall be continuous from the main line to the service box. Bends in polyethylene tubing shall be made in a manner that does not crimp or flatten the tubing.
Taps, service saddles and fittings attached to mains shall be separated from each other by a minimum of 24 inches.
Service saddles shall be wrapped and sealed in 8-mil minimum thickness polyethylene and backfilled with sand. Use pipe wrap tape to secure and seal the polyethylene wrap.
Service lines shall be encased in 8-mil minimum thickness poly tubing. Use pipe wrap tape to secure and seal the polyethylene wrap.
Service manifolds shall be constructed per the following criteria:
1. Where a service line is extended a distance greater than 40 feet, a construction jumper shall be installed per the standard details. The new service line and manifold shall be tested in accordance with these standards.
2. Where a service line is extended a distance less than 40 feet, the extension shall be cleaned, swabbed with chlorine and flushed in the presence of the City. The new service line and manifold shall be pressure tested in accordance with these Standards. In both cases, the installation shall be fully restrained by an approved restraint system, starting at the main and as required by the approved Improvement plans.
3. Service lines and manifolds 3 inches and larger shall be ductile iron.
4. No water shall be drawn through a service prior to installation of the water meter and testing of the backflow assembly.
5. A backflow assembly shall be required for construction and sales trailers having a landscape irrigation system or a septic holding tank.
6. Backflow assemblies shall be covered with a freeze protection insulated bag.
7. The curb in front of residential water services shall be stamped with a “W.”
8. Service saddles shall be installed with zinc caps on all bolts per these Standards.
11.16 Abandonment of Services and Mains
All water services requiring abandonment shall be disconnected from the main line at the corporation stop unless otherwise approved by the City. Mainline stubs shall have the valve removed and replaced with a blind flange or as approved by the City. The abandoned piping shall be removed or left in place as approved by the City.
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11.17 Appurtenance Installation
All appurtenances, including fire protection, blow-offs, sample stations, air release valves and fire hydrants shall be installed in accordance with manufacturer’s recommendations, these standards, and the following provisions.
1. All valves, fittings, DIP, copper and underground brass shall be wrapped and sealed in an 8 mil minimum thickness clear polyethylene encasement. Use 8 mil pipe wrap tape to secure and seal to the polyethylene encasement. Damage or scratched surfaces on epoxy coated valves and appurtenances may be repaired with an epoxy kit per manufacturer’s recommendations and to the satisfaction of the City prior to wrapping, otherwise the damaged valve shall be replaced with a new valve.
2. Gate valves shall be centered in one piece 8 inch riser stock. Riser stock shall be blue PVC C-900. An operator nut extension shall be installed on valves where the operation nut exceeds 40 inches in depth from final grade. Valve extensions shall be continuous and within 24 inches of finished grade.
3. Buried nuts and bolts shall be coated with a bituminous material. This includes exposed bolts found on manufactured appurtenance (i.e. valve bonnets, etc.) “T” bolt heads do not require coating.
4. Break-away bolts shall be used in connecting the fire hydrant to the hydrant break-off spool. Bolts shall be installed nut side up with the bolts filled and covered with silicone caulking. Clearance shall be made for removal of all bolts.
5. Fire hydrants shall be marked with a blue reflector placed 6 inches off the street centerline on the fire hydrant side of the street. Fire hydrants located at intersections shall be marked on both streets.
6. Fire hydrants use a yellow factory applied coating.
7. Dead end lines, permanent and temporary, shall have a blow-off.
8. Insulating kits shall be installed at transitions between dissimilar metal pipes and as required by the City.
11.18 Testing Procedures
Testing of the water system may proceed only after joint utility crossings are completed, the sewer mains and services have passed pressure test and TV inspections and subgrade elevations have been met. Road bases to be lime-treated shall be pressure tested before and after the lime treatment process. Testing prior to subgrade placement may be subject to additional pressure tests at the discretion of the City. The new system shall be filled with potable water through an approved backflow device. During the filling of the line with water, precautions shall be taken to prevent air pockets at high points.
Pressure Test
The contractor shall verify with the City that all system valves are open prior to testing, and the City inspector will be present during the duration of the test.
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Water may be allowed to stand in the line for several hours prior to the test. During the test, which shall be conducted for the time period determined by the City Engineer, but not less than 2 hours, the leakage shall not exceed 5 gallons per 24 hours per thousand feet of pipe per inch of nominal diameter. Test sections shall be as short as valve configurations permit.
If any valved section of pipe shows greater leakage than specified, the Contractor shall locate and repair the leaks and shall retest that section of line at no additional cost to the Owner.
All parts of the pipeline installation shall be tested at 100 psi minimum pressure or a pressure of 50 psi above the maximum working pressure. Tests shall be made in the presence of the City Engineer or the City Inspector.
Topside Improvements
When all water and sewer infrastructures have passed air, vacuum, pressure, and CCTV inspection the City shall notify the Contractor that the project is ready for road bases and top side improvements. This does not constitute approval for use of the infrastructure.
Chlorine Disinfection
Chlorine disinfection shall comply with the most current American Water Works Association Standard for Disinfection of Water Mains and as specified below.
Disinfection inspections shall begin only after passing the pressure test. Prior to chlorination, pre-flush water mains and services. Pre-flushing is not permitted if using the Tablet Method for chlorination. If the tablet method is permitted by the City Engineer the tablets shall be secured to the top of the pipe with an approved adhesive.
Chlorine shall be drawn through all mains, hydrant runs and services. The City shall verify that a minimum chlorine residual of 50 parts per million has been achieved. Portions of existing mains which have been connected to the new line or otherwise contaminated by the construction shall be included in the system sterilization. During the chlorination process, all valves shall be operated.
After a 24-hour holding period, the City will verify that a minimum chlorine content of 25 ppm remains in the system. Upon approval by the City, the water system shall be flushed to remove concentrated chlorine. Flushing shall be continued until the remaining water has a chlorine residual below 1 ppm and a turbidity equal to or less than 1 NTU. Chlorinated water shall be neutralized to 1 ppm chlorine residual or less prior to discharge. Discharge location and neutralization methods shall be documented in the SWPPP and coordination with and approved by the City.
Chlorinated water resulting from flushing newly installed water lines may only be discharged into the City’s sewer system with the specific permission from the City. Prior to discharging into the sewer system, the Contractor shall sign a form authorizing the City to bill for the amount of water discharged into the system. The City shall prepare a bill for water usage based on the meter reading. This bill must be paid before the project is signed off on by the City.
The discharged chlorinated water shall be classified as “low-strength metered commercial users”. The sewer unit for low-strength metered commercial users shall be 1 sewer unit per 1,000 cubic feet. The City shall determine the allowable volume of discharge. Chlorinated water shall not be disposed of into environmentally sensitive areas (i.e., under oak trees, City of Gridley
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vernal pools, man- made or natural streams, drainage systems, etc.) during any time of the year.
All discharges into the sewer system shall be governed by the following conditions:
1. Water used for the purpose of flushing shall be metered.
2. Discharge into the sewer system shall be done in such a manner as to avoid surcharging the sewer system.
3. No discharge into the sewer system shall be permitted on rainy days.
4. No discharge shall be permitted upstream of a small lift station.
5. An approved air gap shall be maintained at all times. Air gap distances shall be calculated as 2.5 times the pipe diameter. In no case shall the air gap be less than 12 inches.
Water Quality Testing
Water quality samples shall be taken per the following procedure.
Once flushing has lowered the chlorine residual below 1 ppm and the turbidity is equal to or less than 1 NTU, the water system shall observe a minimum 24 hour detention time. Water may not be drawn during this time period.
After the 24 hour holding period has elapsed, water quality samples shall be collected and processed by a third party laboratory at the cost of the developer.
The laboratory shall conduct a final chlorine and turbidity test. If the sample lot does not meet the minimum chlorine residual and turbidity criteria, additional flushing shall be required. The procedure shall be repeated until the criteria are met.
Bacteriological samples shall be collected from locations approved by the City, which may include, but are not limited to:
• The ends of new mains
• High points in the system
• Representative intermediate locations as directed by the City Sampling shall be performed by a State-certified laboratory or by City personnel, as directed by the City. The Contractor or Developer shall be responsible for all costs associated with sampling and testing.
A minimum of two consecutive sets of bacteriological samples, collected at least 24 hours apart, shall show satisfactory results in accordance with State drinking water requirements prior to acceptance.
If any bacteriological sample fails, the affected facilities shall be re-disinfected, flushed, and resampled until acceptable results are obtained.
Water mains shall not be connected to the active City distribution system or placed into service until all bacteriological testing requirements have been successfully completed and accepted by the City.
If Coliform is present:
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• Results from 0-1,000: Connect to the City
• Results from 1,000-1,250: Flush and rechlorinate water system and retest • Results 1,250+: Flush and rechlorinate water system and retest Tying into the City System
A tie-in procedure shall be submitted and approved by the City prior to the proposed work.
The Contractor shall allow for up to 7 days review of the procedures by the City. The water system shall be tied into the City system within 10 working days upon completing and passing all the testing procedures. Tie-ins shall be conducted as specified in these Standards.
After the tie-in has been made, the Contractor shall flush the segment tied-in to the approval of the City.
If the new water system cannot be tied into the City system within 10 working days, the new system shall maintain a chlorine residual of 0.5 to 1.0 ppm or be subject to water quality testing and re-chlorination. This shall be discussed with the City.
On site private systems may connect into the City System upon passing all testing procedures, backflow tests and meters have been paid for and installed. A tie-in procedure shall be required per this Section.
11.19 Repairing Installed Improvements
All PVC and DIP water mains shall be repaired per the following procedures.
Damaged or failed pipe sections shall be removed and replaced with new pipe in the presence of the City. Replacement can be accomplished by the use of City approved ductile iron mechanical joint repair sleeves. Pipe restraints will be required.
After the repair has been completed, the excavation shall be backfilled and compacted to grade as specified. The repairs shall then be retested per these Standards.
At the direction of the City, the Contractor shall repair damage to the polyethylene encasement as described within ANSI/AWWA C-105/A21.5 or shall replace all damaged polyethylene film sections.
11.20 Materials
Water Main
Unless noted on the approved plans, all water mains shall be either Polyvinyl Chloride Pressure Pipe (PVC) or Ductile Iron Pipe (DIP).
PVC Pressure Pipe- PVC Pressure Pipe shall be manufactured to a minimum Class 150 rating and shall conform to the “Standard for Polyvinyl Chloride (PVC) Pressure Pipe, 6 inches through 12 inches, for Water” (AWWA C-900), and shall also include the following.
PVC Pressure Pipe shall be blue or white in color and shall have been manufactured within 18 months of installation. The pipe shall be manufacturer date coded and the City provided the manufacturer’s coding for translation. Sun damaged pipe may be rejected at the Inspectors discretion.
Rubber rings shall conform to the “Standard Specifications for Elastomeric Seals (Gaskets) for Joining Plastic Pipe” (ASTM F-477).
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Approved PVC Pressure Pipe manufacturers include: NAPCO, Certa-Lok, Diamond Plastics Corporation, J-M Manufacturing, Pacific Western pipe, Vinyl Tech-White Knight, Pressure Flex Pipe, PW Eagles, North American Pipe corporation or approved equal.
Ductile Iron Pipe- DIP shall be manufactured to conform to the standards ANSI/AWWA C150/21.50 thickness design of ductile iron pipe and to “Ductile Iron Pipe Centrifugally Cast in Metal Molds or Sand-Lined Molds for Water and Other Liquids” (ANSI/AWWA C-151/A21.51) and shall also include the following:
DIP shall be cement-mortar lined in accordance with the standard for “Cement-Mortar Lining for Ductile Iron Pipe and Fittings for Water” (ANSI/AWWA C-104/A21.4).
Approved DIP manufacturers include: McWane, Tyler, US Pipes, Griffin, American, Electrosteel USA, or approved equal.
Services
Brass Material
In compliance with California State Assembly Bill 1953 and any amendments thereto, all brass components and pipe in contact with potable water intended to convey or dispense water for human consumption through drinking or cooking shall be “lead free.”. Compliant brass product shall be marked indicating the product is ”lead free.” Non-compliant product shall be immediately removed from the construction site.
Brass pipe - Brass pipe shall conform to ASTM B-43 standards. A listing of approved pipe include: Hallstead 3/4 inch through 2 inch Red Brass, Cambridge-Lee, Federal WW—351, Wolverine, or approved equal.
Brass fittings- Brass fittings shall conform to ANSI Standard B16.15, B16.24, B2.1, T-94-1 and be a minimum of Class 125. A listing of approved manufacturers include: Lee Brass, Merritt Brass, New England Union Co. or approved equal.
Brass fittings for Copper Tubing - An approved listing for brass fittings for copper tube includes: Jones, Mueller, Ford or approved equal. Parts reference numbers are shown below:
Jones (3/4 inch through 2 inch): Jones Super Grip CTS x CTS E-2609SG, Jones Super Grip CTS x MIP E-2605SG, Jones Super Grip CTS x GIP E-2607SG, (2 Compression x Compression) Mueller (3/4 inch through 2 inch): Mueller-110-CTS H-15403N, Mueller-110-CTS H-15428N, Mueller-110-CTS H-15451N
Ford 3/4 inch: Ford Quick Joint CTS x CTS C44-33-Q-NL 1, Ford Quick Joint CTS x MIP C84-44- Q-NL
Ford 2 inch: Ford Quick Joint CTS x FIP C14-77-Q-NL (2 Compression x Compression) Copper Tubing
Copper tubing shall be seamless, annealed copper tube and shall conform to ASTM B88 “Standard Specification for Seamless Copper Water Tube” and shall be Type K. Copper shall be grade UNS-C12200. For diameters ranging from 3/4 to 1 inch, use Type K Roll Soft Copper. For diameters ranging from 1 1/4 to 2 inch, use Type K Soft 20Sticks. Approved tubing includes: Cambridge Lee, Mueller Streamline, Aqua Shield or approved equal.
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Corporation Stops
Corporation Stops shall be male, iron pipe thread by compression and full throat ball valve design. A corporation stop shall be installed at the water main for all service laterals 2 inches and smaller. Approved manufacturers of corporation stops include: Jones, Mueller, Ford, or approved equal.
Curb Stops
Approved curb stop manufacturers include: Jones, Mueller, Ford, or approved equal.
Service Saddles
PVC Pressure Pipe Service Saddles manufacturers include: Smith-Blair, Jones, Mueller, Ford, or approved equal.
DIP Service Saddles manufacturers include: Smith-Blair, Jones, Mueller, or approved equal.
Appurtenances
In compliance with California State Assembly Bill 1953 and any amendments thereto, all brass components and pipe in contact with potable water intended to convey or dispense water for human consumption through drinking or cooking shall be “lead free”. Compliant brass product shall be marked indicating the product is ”lead free”. Non-compliant product shall be immediately removed from the construction site.
Air Release Valves
Air release valves shall be epoxy coated vacuum break type. A listing of approved manufacturers includes: Crispin, Valvematic, or approved equal.
Backflow Assembly
Backflow Assemblies shall be listed on the “List of an Approved Backflow Prevention Assemblies” published by the University of Southern California.
Backflow Assembly Support Stands
Placer Waterworks series PW/PS or approved equal.
Backflow Assembly Support Stand Saddles
Placer Waterworks series PW/SDL or approved equal.
Backflow Assembly Color:
All brass/copper backflow preventer assemblies shall be painted a: “Forest Green“ color to provide a deterrent to theft with the proper outreach to recyclers.
Blocking for Boxes
A listing of approved materials includes: Slump Block- 4 inch x 4 inch x 15-1/2 inch, or approved equal.
Blow-Off
Approved manufacturers and products include: 2 inch Waterous Resilient Seat valve or approved equal.
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Fittings
PVC- Unless otherwise specified or shown on the approved plans, all fittings to be used with PVC Pressure Pipe shall conform to the standard for “Ductile Iron Compact Fittings for Water and Other Liquids” (ANSI/AWWA C-153/A21.53 for MJ compact fittings; C110 for flange fittings). Approved fitting manufacturers include Sigma, Star, Tyler, Union and US Pipe.
All ductile iron fittings shall be mortar lined in accordance with the standard for “Cement Mortar Lining for Ductile Iron Pipe and Fittings for Water” (ANSI/AWWA C-104/A21.4).
All fittings shall be wrapped and sealed in accordance with these Standards.
The Contractor may use a ductile iron mechanical joint flange adapter designed for AWWA C-900 pipe with connecting PVC Pressure Pipe to flanged fittings or flanged valves. Pipe ends must be cut smooth and square with no bevel. The joint shall be restrained to the PVC pipe using an approved restraint method.
Ductile Iron Pipe- Unless otherwise specified or shown on the approved plans, all fittings to be used with DIP shall employ either mechanical joints or restrained joints conforming to the standard for “Ductile Iron Compact Fittings for Water and Other liquids” (ANSI/AWWA C-153/A21.53). Approved fitting manufacturers include Tyler, Union, and US Pipe.
All ductile iron fittings shall be mortar lined in accordance with the standard for “Cement Mortar Lining for Ductile Iron Pipe and Fittings for Water” (ANSI/AWWA C-104/A21.4 – Double thickness mortar).
All fittings shall be wrapped and sealed in clear polyethylene encasement in accordance with these Standards.
Freeze Protection for Backflow Assemblies
The backflow assembly freeze protection materials shall be comprised of the following:
Laminated forest green fabric conforming to Herculite #10 by Herculite Products (fabric shall be a minimum of 10.6 oz/sq. yd.), or approved equal. Brass Rolled Rim Grommet and spur washer by Astrup, or approved equal. Polyester thread with a minimum strength of 14.2 pounds, Coats American’s Star Ultra product line, or approved equal. Fiberglass insulation R19 rated, 6 inch minimum thickness. 2 inch minimum width Velcro, or approved equal. Nylon zip ties.
Gaskets
Gaskets shall conform to the following specifications:
Flange Gaskets – Flange gaskets shall be neoprene rubber, red rubber, US Pipe, Flange Tite, or approved equal.
Push On Gaskets – Pipe manufacturers recommendations.
MJ Gaskets – Pipe manufacturers recommendation.
Hydrants
Hydrants shall be wet barrel type – lead free. Exterior shall be have a factory applied yellow (or Red) coating. Caps shall be cast iron. Approved hydrants include: Clow 960 or approved equal. The Part Number shall contain the letter “NL” to indicate the hydrant is lead free.
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Hydrant Bury
Hydrant buries shall be ductile iron mechanical jointed cross flange, cement-mortal lined per manufacturers recommendation and per AWWA C104. A list of approved hydrant buries include: South Bay Foundry MJ x Size, Clow MJ x Size or approved equal.
Hydrant Bury Extensions
Hydrant bury extensions shall only be used with prior City approval.
Location Stakes
A list of approved off-site location stakes include: Carsonite-, 4 inch x 5 feet with anchor barb kit, Caution stickers attached and organization decal, City of Gridley-Call Before Digging-, or approved equal.
Main Line Valve Lock-Out
A list of approved manufacturers and part reference numbers include: SW Services PC800, DC600, or approved equal.
Manhole Frame and Cover
A listing of approved manufacturer and part reference number includes: South Bay Foundry (SBF1957-W), GMI Composite Frame and Cover 2600 and 3800 series, or approved equal.
Manholes constructed outside of paved area shall use a GMI composite lid and frame.
Meters
All meters shall be purchased through the City.
Meter Idlers
Meter Idlers shall be coordinated with the City to be the same brand as City provided meter.
A listing of approved meter idler manufacturers include: Ford, Jones, Spears, or approved equal. Part reference numbers are shown below:
Meter Setters
Meter Idlers shall be coordinated with the City to be the same brand as City provided meter.
Meter Spud Couplers
Meter spud couplers shall be coordinated with the City to be the same brand as City provided meter.
Nuts and Bolts
Flange Bolts and Nuts-Flange bolts and nuts shall conform to a minimum ASTM #A307. Bolts less than 3/4 inches in diameter shall be a minimum Grade B (heavy hex). Bolts ¾ inches and larger in diameter shall be a minimum Grade A (standard hex).
Hydrant Bolts
Hydrant bolts shall be Hollow Break Away and per manufacturer’s recommendation.
Meter Bolts are to be stainless steel, Grade 316 with brass nuts.
Tee Bolt- Steel bolts are to be 3/4 inch high strength, low alloy steel with a heavy nut, conforming to AWWA Standard C-111-90.
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Nylon Bushings
Nylon bushings shall be 76-76R, 2-1/2 inch MIPT x 2 inch FIPT.
Patching Material
A listing of approved manufacturers and part reference numbers for patching Dip include:
Cop-Coat Carboline Company (Bitumastic No. 50, Coal Tar), Coppers Coat 50, or approved equal.
Pipe Wrap Tape
10 mil vinyl tape manufactured by Calpico Inc. (Calpico VI-10) or approved equal.
Polyethylene Encasement
Black non-colored polyethylene film shall be used. The polyethylene film shall have a minimum thickness of 8 mils. The thickness shall not be less than 10 percent of the nominal thickness. The polyethylene shall be in either tubular or in sheet form. Polyethylene film shall be manufactured from a Type 1, Class A raw polyethylene material conforming to “Polyethylene Encasement for Ductile-Iron Piping for Water and Other Liquids” (ANSI/AWWA C-105/A21.5). Approved manufacturers include: Fee Spec’s-LP378D Northtown, Fulton Enterprise Inc., Global Polymer Tech, Unisource, or approved equal.
Pressure Regulators
A listing of approved all brass pressure regulator systems include: Watts (3/4 inch through 2 inch, UB5-series), Wilkens (3/4 inch through 2 inch 600 series, 2-1/2 inch through 3 inch 500YSBR), or approved equal.
Reinforcement Bar
Rebar shall be grade 40 steel, deformed type. Smooth bar shall not be allowed. All rebar shall be number four unless otherwise specified on plans.
Restraints
PVC - Approved restraint systems for PVC Pressure Pipe include: NAPCO Certa Lock (for straight runs only), Romac Grip Rings, EBAA Iron Series 2000 PV, Sigma One Lok Series “SLC”, DR18 JM Eagle Loc, eagle lock, PVC Star Grip 4000 series, (See section 81- 16,H for additional conditionally approved options) or approved equal.
DIP - Approved restraint systems for DIP include: Field Lock Gaskets (3 inch through 12 inch diameter only), Mega Lug 1100 Series, TR Flex, sigma One Lok Series “SLD”, Star Grip 3000 series, American Fastite Joint Assembly or approved equal. If Field Lock gaskets are used it requires pulling back the slack in the pipe.
Riser Aligners
Riser aligners shall be per the City Standard Details.
Riser Stock for Curb Stops
Riser stock shall be schedule 40 PVC, SDR 35 or C-900. The riser shall be 4 inch diameter inside meter boxes.
Riser Stock for Main Line Valves
Riser stock shall be 8 inch diameter PVC C-900 for all main line valves.
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Service Boxes
All box lids are to be permanently marked with the appropriate label (i.e., Water, ARV, BlowOff, CPT, etc.). Lids shall have a 1 7/8 inch hole offset at upper 1/3 portion of lid measured along the long axis. In commercial project, meter lids shall be stenciled with the number address it serves. The numbers shall be painted using white enamel paint and 2 inch stenciling. A list of approved box manufacturers include: Carsonite, Christy, BES, Armorcast, CDR, Placer Water Works, or approved equal.
Traffic Boxes
A list of approved traffic box manufacturers include: Bes, Christy, Placer Waterworks or approved equal.
Tracing Wire
Tracing wire shall be light blue in color and minimum 12 gauge solid copper with UF rated plastic insulation.
Tracing Wire Mastic Tape Seal
Tracing wire mastic tape shall be 3M Mastic Tape #2229 or approved equal.
Valves
Butterfly Valves- Butterfly valves to be used on pipe diameters ranging from 12 inch to 72 inch. A list of approved valves include: Standard Pratt Ground Hog, with MDT Traveling Nut Actuator, Mueller Lineseal III, Dezurik butterfly valve with square nut actuator, (LA series) , or approved equal. NOTE: All valves shall be holiday free poxy, interior lining and standard black asphalt varnish exterior. Certification shall be provided by the valve manufacturer stating the epoxy lining is holiday free. The epoxy coating shall be spark tested and approved for installation by the City inspector.
Gate Valves- Gate valves used on diameters ranging from 3 inch to 12 inch shall be grey cast iron or approved equal. A list of approved valves includes: M & H 4067 RW Gate Valve, Mueller-A-2360 RS Gate Valve, Clow, AFC or approved equal. 2 part epoxy repair kit shall be provided by valve manufacturer.
Valve Boxes
All valve boxes in street and other traffic areas shall be designed to H-20 loading conditions.
A list of approved manufacturers and part reference numbers include: Christy (Type G5, Type B 17 by 30 H-20), BES, Brooks, D&L (#K-6004), or approved equal.
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Sanitary Sewer
12.1 General
These standards shall apply to the engineering design and construction of all sanitary sewer system to be maintained by the City, or with those exceptions as noted, within private multiple ownership residential or multi-parcel commercial and industrial developments.
All work shall be installed in accordance with the requirements of these standards, as recommended by the manufacturer, the California Building Code, the California Plumbing Code.
These standards and manufacturer’s guidelines shall be present at the construction site at all times.
12.2 Connect to Existing Facilities
Connection to existing City sewer facilities shall be made after approval of construction and bypassing plans from the City Engineer, and all permits have been issued.
The City has the option of making any system tap as required on the plans. Should the City elect to perform the tap, the Contractor shall pay for such work on a time and materials reimbursement basis. The Contractor shall be responsible for the following tasks associated with the tap, and as determined by the City.
1. Coordinating the work requested with the City. This shall include discussions on provisions for materials and equipment required to complete the work.
2. Traffic Control per the City’s requirements.
3. Excavating the work area, as agreed upon by the City.
4. Sheeting, shoring and bracing as required.
5. Lighting as required if the tap is to be performed at night.
6. Backfilling, compacting and pavement restoration of the excavations upon tap completion.
7. A bypass pumping plan, with a secondary back up pump as required. A bypass pumping plan must be submitted to and approved by the City Engineer. Anticipated Flows rates and pump capacity shall be shown on the plan. Sections of existing surcharge pipe may be encountered in the system.
8. Bypass pumping operations shall be monitored full time at the cost of the Contractor.
Existing Sewer Stubs and Sewer System Outfalls
The contractor shall excavate and connect to an existing sewer stub in the presence of the City. Existing stubs shall be air tested by contractor and CCTV’d by the Contractor before connecting. If an existing stub is found damaged or otherwise exceeding tolerances, the contractor shall remove and replace the stub prior to connecting. Contractor shall incur all expenses. A note to this effect shall be placed on the improvement plans.
Sewer system outfalls shall be mechanically plugged and grouted. The plug shall remain in place until final acceptance by the City.
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Construction Staking
The sewer main shall be staked prior to installation. Such staking shall provide the station and offset to the sewer main, as well as the cut to the nearest 0.10 foot. Stakes shall be provided at a minimum of every 100 feet in tangent sections and every 25 feet in curved sections, and every 10 feet in approved vertical curve sections, and at all appurtenances or structures.
12.3 Average Flow Determination
The determination of average dry weather flows for design purposes shall be based upon the best available information concerning land use and density as determined by the City. This information may include approved land use and density in accordance with current zoning in the absence of more specific information pertaining to expected development. Average dry weather flow factors are listed in Table 12-1.
Table 12-1 Flow Designation
Land Use Designation Units Flow Factor
(gpd/unit)
Commercial gpd per acre 850
Industrial gpd per acre 850
Agricultural Gpd per acre 600
Neighborhood Center Mixed Use gpd per acre 2,300
Public/Quasi-Public gpd per acre 660
Schools gpd per acre 170
Residential (All) gpd per DU 250
Open Space gpd per acre 0
Parks> 10 Acres gpd per acre 10
Vacant gpd per acre 0
*Includes allowances for I&I
**Future development shall use the factor that results in the highest flow ***Factor flow assumes a 30% FAR. 50% for senior living
12.4 Design Flow
Design flow sizing of infrastructure 15 inches in diameter and smaller shall be calculated by using the average dry weather unit flow factor(s) listed in Table 12-1 for the upstream service area.
Maximum flows shall be based on the ratio of peak to average flows as determined by using a Peak Factor of:
2.8
.
(Q in MGD)
7.72
.
(Q in GPM)
For sizing trunk sewers 18 inches in diameter and larger, utilize the hydraulic model of the collection and conveyance system and consult with the City.
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12.5 Pipe Capacity, Slope, Velocity, Size, Depth and Material Design criteria for the pipe system are as follows:
Main Sizes
The minimum size sewer main within a residential development shall be 6 inches in diameter.
The minimum size sewer main for commercial and industrial developments shall be 8 inches in diameter.
Slope and Velocity
Manning’s formula shall be used to determine the relation of slope, design flow, velocity, diameter, and “n” value. The “n” value shall not be less than 0.013 for all pipe materials.
Table 12-2 provides minimum slopes and design flow capacities for various pipe diameters.
Pipe slopes less than those listed in this table shall not be used without the approval of the City. The slopes indicated are based on a velocity of two feet per second with the pipe flowing full.
Table 12-2 Minimum Slopes
Pipe Diameter (in) Slope (Ft/ft) Capacity at 0.7
Depth (MGD)
Capacity Flowing
Full (MGD)
6 0.0050 0.22
8 0.0035 0.38
10 0.0025 0.58
12 0.0020 0.85 1.00
15 0.0015 1.32 1.60
18 0.0012 1.95 2.35
The maximum depth of flow at design conditions in any lateral 10 inches in diameter or less shall be 70% of pipe diameter. Lines 12 inches in diameter or larger may be designed to flow full unless direct sewer connections are planned, in which case the 70% pipe diameter maximum depth of flow shall govern.
All sanitary sewer pipe shall be designed for a minimum scour velocity of 2 feet per second at peak flows. The volume of wastewater within the pipe system as determined above shall be used when designing pipe slopes. Maximum design velocity shall not exceed 10 feet per second.
Capacity
Pipe capacity, in all cases, shall be adequate to carry the Peak Wet Weather Flow (PWWF) from the entire tributary shed area even though said area may not be within the project boundaries.
Hydraulic Grade Line
The hydraulic grade line shall be determined from the design flows, based upon 100% development of the tributary area. Hydraulic grade line calculations must be submitted for the design of all lines 12 inches in diameter or larger.
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Depth
Sewer mains with service lateral shall not exceed a depth of 15 feet. The system shall be designed to provide a minimum slope for sewer services of ¼ inch per foot with a minimum cover of 12 inches at any buildable location within the properties to be served. Proposed building pad elevations shall be a minimum six inches above the lowest upstream manhole rim. Where the building pad does not meet the elevation requirement, a backwater valve for the building shall be required. The backwater valve shall be noted on the improvement plans and building plans. Installation shall be made during construction of the underground improvements. Deed restrictions shall be put in place which hold the City harmless for failure of the backwater valves on such lots.
12.6 Manhole Criteria
The design criteria for manholes are as follows. Manholes shall be placed at the intersection of all sanitary sewer lines, at the upstream end of a pipe run, and at the end of any temporary line more than 200 feet in length. No more than three lines may enter a manhole with one line exiting. Pipes shall be aligned so that there is sufficient spacing between each pipe entry on the barrel section.
Spacing
Maximum spacing of manholes shall be 500 feet for all straight lines of 10 inches in diameter or less. Manhole spacing for mains 12 inches and larger shall be considered on a case-by-case basis. A line with a radius greater than 400 feet shall be considered as straight for purposes of this section. Manhole spacing on curved lines of 200-feet radius (minimum allowable) shall be 200 feet. Manhole spacing on curved lines of radii between 200 and 400 feet, or where only a portion of the line is curved, shall be adjusted proportionately. Reverse curves require a manhole at the point of tangency of the curves or as determined by the City. A manhole shall be required at any change in vertical alignment, pipe size or change of direction unless approved by the City.
Invert Elevations
The invert elevation for pipe of the same diameter entering a manhole shall have a 0.10- foot drop between the entering and exiting pipe. Under special circumstances, the 0.10-foot drop may be waived with the approval of the City. Mains with 10 or fewer services shall enter manholes at an invert to crown match with the exit pipe. Lateral mains entering trunk mains, as defined by the City, shall enter manholes at an invert to crown match with the exit pipe.
Manhole Sizing
A standard 48 inch manhole with a 24 inch access opening shall be used for sewer mains 12 inches and smaller, and not exceeding 20 feet depth. A 60 inch manhole with a 36 inch opening shall be used for sewer trunk mains 15 inches to 36 inches in diameter. The design of larger trunk mains shall be approved on a case-by-case basis.
Buoyancy Resistance
The City experiences elevated groundwater conditions throughout the year, with peak groundwater levels occurring during the irrigation season The Contractor or Developer’s Engineer shall submit buoyancy calculations for review demonstrating adequate resistance to uplift.
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Buoyancy calculations shall:
1. Assume the groundwater elevation is at finished grade unless otherwise approved by the City Engineer.
2. Assume the manhole is empty.
3. Include buoyant uplift forces based on displaced volume.
4. Include resisting forces from the weight of the structure, soil cover, concrete collars, anti-float collars, ballast slabs, or other approved anchorage systems.
5. Demonstrate a minimum factor of safety against flotation of 1.10.
Where buoyancy calculations indicate insufficient resistance to flotation, the design shall include one or more of the following:
1. Enlarged precast base section
2. Cast-in-place anti-float collar
3. Reinforced concrete ballast slab
4. Mechanical anchorage system
5. Other approved anti-flotation measures
The City may require a geotechnical evaluation to establish groundwater elevations and soil conditions.
Manhole Coatings
Manhole coatings shall be required in areas determined to have a potential of generating excessive sulfide gases. Such manholes shall include, but are not limited to, all manholes on trunk mains 15 inches in diameter or larger, the first manhole originating from a sewer trunk main 15 inches in diameter or larger, force main transition manholes, manholes designed with inside drops, or as determined by the City.
Manhole Access
Provisions must be made to prevent vegetation from overgrowing the manholes. An allweather 10-ton vehicular access shall be provided to each manhole as required by the City. Turning radii of 30 feet inside and 45 feet outside, and a vertical clearance of 14 feet are required.
Connection to City Mains
Improvement plans which require a tap to an existing City sewer main shall specify that such connection be performed by City forces on a time and materials basis.
12.7 Drop Connection Criteria
Drop connections shall be permitted under special conditions and with the approval of the City.
There shall be no more than one inside drop connection into a 4-foot diameter manhole. If an elevation difference of at least 3 feet is not available, the slope of the incoming line shall be increased to eliminate the need for the drop.
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Public Works Construction Standards Section 12
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12.8 Mainline Transitions
Mainline transitions shall be made at a sewer manhole.
12.9 Sewer Service Design
The design criteria for sewer services are as follows.
General
Services shall be designed and constructed per the City standard details. The service shall extend from the main to the edge of the public right-of-way or easement. The service shall be stubbed up at the public right of way and the cleanout shall be constructed per the City standard details. The customer is responsible for and owns the lateral from the sewer main to the building which is being serviced. Services shall extend two feet beyond edge of pavement of private roads. Easements of adequate width to accommodate the service shall be obtained. At minimum, sewer easements shall be 12 feet in width in accordance with Gridley’s Municipal Code §13.04.120. A plan and profile of services shall be supplied to the City on request.
Cleanouts shall be designed and constructed to grade with subdivision improvements or at the time connection is made to the building sewer. Unless otherwise noted on the plans, construction of the cleanout to grade is the responsibility of the contractor for the subdivision improvements. If installation of the cleanout is deferred, the plans shall call for the placement of a 2-inch by 4-inch post at the end of the service sewer extending from the flow line to not less than 12 inches above ground surface. The service shall be plugged at right of way and an 18-inch diameter coil of #12 tracer wile shall be buried at the end of the service.
Sizing
The minimum size service for single-family developments shall be 4 inches in diameter.
Services greater than 100 feet in length shall be 6 inches in diameter. Schools, commercial, industrial, and multiple residential properties shall be served by a minimum 6-inch diameter service.
Connection to Sewer Mains
Residential services shall connect to the sewer main by means of a factory fitting. Properties with services located at the end of cul-de-sacs shall enter a manhole. A 6-inch service shall enter a 6-inch main by means of a manhole. A 6-inch service entering an 8-inch or larger main must either be connected with a manhole or by means of a factory fitting with a manhole placed at the property line. Services 8 inches in diameter and larger shall be connected to the main by use of a manhole. In no case shall a service connection be made with the use of a tee.
Connection to Existing Sewer Mains
The City reserves the right to make all sewer service taps onto existing mains after approval and payment of the required connection fees. If the City elects to utilize city forces for sewer service taps payment made to the City for such work will be on a time and materials basis. A note to this effect shall be placed on the plan sheet which shows a detail for the area that requires such tapping. The application shall be made to Public Works. Connection fees shall be paid prior to submittal of the application. All excavation, backfill, and the City of Gridley
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installation of the remainder of the sewer service or stub shall be performed by the Contractor.
Connection Limitations
Sewer services shall connect to 12-inch diameter and larger pipe or to lines more than 15-feet in depth at a manhole. Direct connection to trunk mains shall only be with the approval of the City.
Location
A sewer service shall be constructed to each lot. In new subdivisions or developed areas, unless specifically requested otherwise in writing, sewer services shall be placed on the low side of a typical subdivision lot or similar parcel with 2% or greater slope across the front, or shall be placed in the center of lots of lesser slope. Trees, improvements, etc., are to maintain a minimum of 5 feet from the sewer service, including the cleanout and where the sewer service is extended to service the house.
If the property is located such that service is available both to a line located in an easement and in a right-of-way, service shall be at the latter location unless otherwise approved by the City. No sewer service shall be located such that future on-site construction will result in the line being in such proximity to a water well or water main or service that applicable health standards will be violated.
Depth
Adequate depth of sewer service at the edge of easement or right-of- way to service the intended parcel shall be verified. A depth of 3 feet to crown of pipe, measured from gutter flow line or edge of adjacent roadway, whichever is lower, shall be considered the standard for service sewer depth, except where the water main is to be installed at back of sidewalk as part of the subdivision improvements. In such cases, service shall have a minimum depth of cover of 4-feet 6-inches at the property line and the service shall be extended to a minimum of 7 feet back of sidewalk with the cleanout to grade remaining within 2 feet of back of sidewalk. When greater depth is required, the invert elevation of the service sewer at the edge of the right-of-way or easement shall be noted on the improvement plans. If a joint trench is being utilized for other utilities, the plans shall indicate that a joint trench will exist and service elevations shall be adjusted accordingly.
Sewer service connection to the main 14 feet or deeper, shall place concrete around the haunch of the “wye”. Sewer service connection to the main shall not exceed 15 feet.
Special Requirements in Developed Areas
In developed areas, a sewer service shall be provided to each parcel participating in the project which contains a source of sewage less than 200 feet from a lateral. A property owner’s request for service location shall be honored whenever practical. Parcels which have two or more sources of sewage must have an independent sewer service provided for each sewage source which can be separated from the rest of the parcel and sold. A service shall be provided to each lot. During the design period, each property owner affected by the proposed work shall be contacted in writing to determine the preferred sewer service location. In the absence of a response, a sewer service shall be provided in accordance with these standards. In addition, upon staking the location of the proposed sewer services prior to construction, each property owner shall be given a final opportunity to approve the City of Gridley
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proposed sewer service location. A compilation of this information shall be furnished to the City.
Warranty Inspection of Sewer Main Stubs
As a requirement, sewer stubs are provided to subdivisions as a courtesy by developers during the construction of backbone infrastructures in streets to prevent cutting up the newly paved streets when the subdivisions are ready to develop. These stubs become an integral part of the sewer system of the subdivisions and subsequently the responsibility of the developers of the subdivisions and are therefore imperiled to both construction and warranty inspections. This practice saves future developers construction time and cost that would have otherwise been spent on tie-ins and street repairs and in some instances prevents delays in the event a street has a moratorium. Since these stubs are provided at no cost to future developers, it is our position, hence our policy, that it is the responsibility of contractors to test and repair these stubs, if found damage, prior to tie-ins. A note to this effect shall be placed on the improvement plans.
Grease Interceptor
A grease interceptor is required for any business that has the potential to produce grease, as defined in the Gridley Municipal Code. The size of the interceptor shall be determined in accordance with the current edition of the California Plumbing Code adopted by the City and subject to the approval of the Public Works Director.
General Commercial/Retail buildings shall require dedicated grease lines for future use. A location for the future grease interceptor shall be identified on the improvement plans.
Oil/Sand Interceptor
An oil/sand interceptor shall be installed for any business having the potential of producing oil and sand waste resulting from routine maintenance as specified in the Gridley Municipal code. The size of the interceptor shall be determined in accordance with the current edition of the California Plumbing Code adopted by the City and subject to the approval of the Public Works Director.
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12.10 Canal Crossing Design
Advance approval of the City Engineer, and other appropriate agencies is necessary to initiate design. The criteria for creek crossings are as follows.
General
In all cases, the proposed future creek/irrigation ditch bed elevation shall be used for design purposes. Crossing details of pipe, piers, anchorage, transition couplings, etc., shall be shown on a detail sheet of the plans. The top of pipe shall have a minimum of 3 feet of cover at the shallowest point of the crossing.
Gravity Mains
For line sizes 10 inches and smaller, ductile iron pipe shall be used under the full creek width plus 10 feet each side. For line sizes 12 inches and larger, pipe used shall be as determined by the City. The ductile iron pipe shall be supported by steel I-beam piles. The steel I-beam pile shall be installed to a yielding depth as recommended by the soils engineer. Each stick of pipe shall be supported by a least one pile or as approved by the City Engineer. A steel plate shall be welded on top of the I-beam. A ½-inch thick polyethylene pad shall be installed on top of the steel plate for the pipe to rest on. The pipe shall be held by two 2-inch wide galvanized steel straps, with galvanized bolts attached through the steel plate and polyethylene plate. An insulating material shall be used between the pipe and the section of strap coming into contact with the pipe. All exposed surfaces shall be coated with coal tar epoxy. A layer of 4-inch to 8-inch cobbles shall be placed and compacted on the top surface of the trench area for the full width of the creek. A trench plug shall be required at the top of the pipe at the downstream side of the crossing. The plug shall be a minimum of 4 feet in length, and shall extend 24 inches beyond the width and depth of the trench.
Design
Calculations shall be submitted which clearly indicate the design of the pipe and supports regarding impact, horizontal and vertical forces, overturning, pier and anchorage reactions, etc.
12.11 Pump Station and Force Main Requirements
Every phase of pump station design, including force main design, shall be closely coordinated under the direction of the City Engineer. The pump station and force main shall be designed and submitted concurrently. The plan sheets will show the general layout and control system required for a typical acceptable sewage pump station. The plans shall call out the testing required for acceptance of the pump station.
Location
The pump station and facilities shall maintain a minimum 100- foot separation from existing and proposed residential and commercial structures. Adequate maintenance access shall be provided to the pump station. The access design shall consider requirements for the removal of pump station equipment.
Capacity
The pump station shall be designed to accommodate ultimate buildout flows as well as initial flows. Allowances for larger or additional pumping equipment must be made for future requirements. If the design capacity is more than anticipated initial flow, the effects City of Gridley
Public Works Construction Standards Section 12
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of the minimum flow condition must be estimated to prevent excessive retention of sewage in the wet well, to prevent septic conditions, and to determine whether the pumping equipment will operate within the manufacturer’s guidelines. Table 12-3 provides planning level criteria for sizing and configuration of pump station and force main facilities.
Table 12-3 Pump Station and Force Main Criteria
Pump Stations
Capacity PWWF (hydraulic modeling required for pipes 18 inches and larger)
Storage 4 hours
Operation Lead/lag for duty pump(s), plus 1 standby pump Maximum Pump Cycles 6 cycles/hour (3 cycles per pump)
Force Mains
Headloss Hazen-Williams roughness coefficient (C-factor) of 120
Maximum Velocity 7-10 feet per second
Minimum Velocity 3.0 feet per second
Wet Well
The wet well design and detention time shall be such that the deposition of solids is minimized and the sewage does not become septic. Provisions for 4 hour storage capacity shall be provided. An interior protective coating shall be required for the prevention of hydrogen sulfide corrosion of the structure. Maximum depth of wet well shall not exceed 35 feet.
Pumps
Pumping equipment shall consist of centrifugal pumps. Pump suction and discharge size shall be a minimum of 4 inches in diameter. Pump drive units shall be electric. A sufficient number of pumping units shall be installed such that station capacity can be maintained with any one unit out of service. Provisions for telemetry shall be included in the station control system as directed by the City.
Station Piping
Suction, discharge, and header piping within the station shall be sized to adequately handle flows. Piping less than 4 inches in diameter shall not be used for conveying sewage. Valves shall be located to allow proper equipment maintenance and operation. The design shall provide a bypass configuration back to the wet well.
Odor Control
If required, the station shall have equipment and/or space provided for the purpose of introducing odor control chemicals into the wet well, upstream gravity line, and/or force main. Adequate provisions shall be made for the safe handling and storage of chemical containers. The force main shall be designed to maintain a continuous uphill grade, or, as a minimum be level. All force mains shall have provisions for introduction of either air or odor control chemicals.
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Public Works Construction Standards Section 12
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Force Mains
Force mains shall be designed such that the velocities normally fall within a range from 3 to 5 feet per second. If initial capacity of the station is considerably less than ultimate, consideration should be given to the prevention of septic conditions due to extensive detention time within the force main. The feasibility of installing dual force mains to accommodate initial and ultimate flows shall be investigated in such situations. Provisions shall be made introducing a “cleaning pig” into all force mains. The design shall also include facilities to eliminate or sufficiently dampen transient forces and/or surging in the event of an immediate station shutdown. Details shall be included in the improvement plans. The maximum angle allowed on force mains is 22.5 degrees.
A corrosion protection study shall be included with the improvement plan submittals.
Corrosion protection facilities for the force main shall be identified from the roadway with a curb stamp labeled “CP – FM”.
Supervisory Control and Data Acquisition
SCADA requirements for pump stations shall be provided by the City. The submittal shall be included along with the improvement plans for such facilities.
Valves
Valves on pressurized sewer systems shall be check valves.
12.12 Multi Parcel Commercial and Industrial Developments “On-site” sewer mains for new commercial and industrial developments containing more than one parcel, shall be designed in accordance with the requirements contained in these standards or as approved by the City. The sewer main shall be installed within a dedicated public sewer easement in accordance with these standards. Each separate parcel within a multi-parcel commercial or industrial development shall have a separate connection to the public sewer line(s).
12.13 Sewer Improvement Plan Requirements
Plans for the construction of sanitary sewers, whether in conjunction with other improvements or for a sewer project only, shall conform to these standards, and meet the following requirements.
Sewer Study
A sewer study or sewer master plan as determined by the City may be required prior to review of the sewer design if there is a possibility that upstream or adjacent areas might require service through the subject property. The map shall show the entire area including upstream tributary and adjacent areas, and all other data necessary to determine anticipated sewage flows. The method of providing service to the entire service area, including pipe sizes and slopes, shall be shown to the extent necessary to determine the requirements within the subject property.
General Requirements
Plans for sewer improvement projects shall include a layout sheet, plan and profile of each public sewer line, and necessary detail drawings.
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Public Works Construction Standards Section 12
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Layout Sheet
Improvement plans shall include an overall map which shows the project boundaries, sewer lines, manholes, backwater valves, and other important items of the work.
A parcel which benefits from and financially participates in a sewer construction project, but is not included within the project boundaries, shall have a note to this effect placed on the layout map and on the plan and profile sheet if the parcel appears thereon. Parcels which make use of those facilities may be subject to additional fees at the time of connection, if the participation has not been so noted.
12.14 Pipe Bedding
Conform to City Standard Detail SS-05 for Sewer Pipe Bedding.
6. Bedding shall provide uniform and continuous support along the barrel of the pipe. The minimum depth of bedding material shall be provided under the bell. Blocking of the pipe is not permitted.
7. Loose material shall be removed from the trench bottom and replaced with imported material.
8. Where rocky, unyielding or unsuitable foundation material is encountered, the subgrade shall be over-excavated a minimum of 4 inches and replaced with imported bedding material.
9. Where the trench bottom is soft, yielding or unstable, the trench bottom shall be overexcavated by 4 inches and ¾-inch crushed rock shall be placed in the trench to provide a stable foundation, to the satisfaction of the City Inspector. The rock is in addition to the required pipe bedding used in the pipe zone.
10. Where a saturated trench condition is encountered, the trench wall and pipe shall be lined with a geotextile fabric as shown on Standard Detail SS-05, and to the satisfaction of the City Inspector.
11. Bell holes shall be excavated per the manufacturer’s recommendations. The minimum depth of bedding material shall be provided under the bell. Care shall be taken to ensure that the bell hole is no larger than necessary to accomplish proper joint assembly.
12.15 Pipe Installation
The sewer system outfall(s) shall be mechanically plugged and grouted, and shall remain plugged until final acceptance. The system shall be constructed to minimize infiltration and inflow. Evidence of groundwater infiltration, excessive wet weather flow contribution, or operational deficiencies may require corrective action at the City’s discretion. Sewer pipe (gravity and pressure) shall be installed in accordance with the following provisions:
The Contractor shall keep the pipe interior free from foreign materials and in a clean and sanitary condition until acceptance by the City. At times when pipe laying is not in progress, the open pipe end shall be sealed with a tight cap or plug to prevent foreign matter from entering the pipe. Provisions shall apply to the break times as well as overnight. Trenches shall be in a reasonably dry condition when pipe is laid.
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Public Works Construction Standards Section 12
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Care shall be taken, when lowering pipe into the trench, to protect the pipe from damage. Chains are not permitted. The pipe shall be laid carefully to the lines and grades shown without grade breaks, unless designed with such, or to minimum depths shown on the approved plans. If field conditions exist such that the pipe may not be laid to the specified grade, the approved plans will require revisions prior to proceeding with construction.
Pipe sections shall be closely jointed to form a smooth flowline. Care shall be taken in placing the pipe and making field joints.
Improvements installed without proper inspection shall be exposed and inspected as required by the City.
All installations shall follow the manufacturer’s recommendations unless otherwise noted on the approved plans. The manufacturer’s installation guide shall be on the job site at all times.
A 12 inch wide metallic backfill tape with the warning “SEWER MAIN BURIED BELOW” shall be placed in the trench lines of all mains and services, between the piped bedding and backfill layer.
Mains in unpaved areas shall be marked every 125 lineal feet with a green composite utility marker having a decal stating, “CAUTION BURIED SEWER PIPELINE”. Appurtenances (such as manholes, valves, ARV’s, test stations, etc.) and angle points shall also be marked. Mains in landscaped areas shall be delineated with a brass marker set in an 8 inch diameter concrete cylinder.
Polyvinyl Chloride (PVC) Pipe
Pipe-laying shall proceed upgrade with the bell end of the pipe placed upstream and shall follow manufacturer’s guidelines for installation.
Ductile Iron Pipe (DIP) Installation
DIP for gravity sewer applications shall have an interior coating with “Permashield-431” (or approved equal) unless otherwise specified on the approved plans. DIP sewer systems shall be constructed per the manufacturer’s recommendations.
The force main shall be constructed and tested in accordance with the water pressure pipe standards established in Section 11-Domestic Water of these Standards, with the following deviations:
The force main will not require disinfecting or water quality testing. The main shall be preflushed again with a properly sized “pig” after the pressure test. Flushing shall occur in the presence of a City Inspector.
Backfill tape shall be 12 inch wide green metallic tape stating, “SEWER FORCE MAIN BURIED BELOW”.
Exothermic welds shall be made on the bell of the pipe as near to the edge as possible and on the weld pads provided on the spigot end of the pipe.
When it is necessary to cut a “Permashield 431” treated pipe, the City shall make all repairs prior to installation. Coordinate with the City.
All DIP fittings for wastewater use shall have an interior coating with “Permashield-431” Or approved equal.
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Public Works Construction Standards Section 12
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Tracing wire shall be installed per Section 11-Domestic Water of these Standards. Above ground access to the tracing wire shall not exceed 500 linear feet along the main. Access shall be provided by raising and securing the tracing wire through a conduit into a valve box.
This location shall be 2 feet minimum from back of walk and marked per standards
12.16 Manhole Installation
Manholes shall be installed in accordance with the Standard Details and as specified herein:
Manholes shall be set flush with finish grade in improved areas, unless otherwise noted on the approved plans. Manholes placed in off-site, unimproved areas shall be constructed with the top of the casting cover a minimum of 6 inches above the final surrounding grade. A minimum 12 inch wide concrete collar shall be constructed around the casting and centered in collar.
Manholes may not be placed in the center of intersections in all new development.
Manholes placed in landscape areas adjacent to City improvements shall be constructed with the top of the casting cover a minimum of 6 inches above the final surrounding grade. A minimum 12 inch wide concrete collar shall be constructed around the casting and 6 inches below finish grade.
PVC pipe entering a sewer manhole shall have a flex joint at the manhole base. A flex joint consists of a bell and spigot joint at the manhole with only bell ends cast into the manhole base, and a second bell and spigot joint located 12 to 24 inches outside of the manhole. Service “Y’s” shall not be installed directly onto a manhole.
Manhole lids and castings for 48 inch diameter barrels shall be 24 inch diameter. Manhole lids and castings for 60 inch barrels shall be 36 inch diameter. Lid shall be bolt-down type with 2 cast-in-place bars and a gas detector probe hole, and have no poke holes. Lids shall be bolted when a manhole is constructed outside a paved area, as specified on the approved plans, or as directed by the City. Manholes constructed outside of paved area shall use a GMI composite lid and frame. All manhole openings 36 inches or larger shall use a GMI composite lid and frame.
Sewer mains or services entering an existing manhole shall be core drilled, without exception.
The space between the pipe and the manhole shall be filled with non-shrink grout or a core-nseal boot or approved equal may be used.
Any work on an existing sewer manhole shall require the manhole to pass a vacuum test as described in the Testing procedures of this Section. The work completed shall remain exposed until the vacuum test has been accepted by the City.
Concrete manhole bases may be either pre-cast or cast-in-place. Pre-cast bases shall conform to these Standards. Cast-in-place manholes shall be constructed in accordance with the details provided in these Standards:
Concrete shall be per the most recent edition of the Caltrans standard specifications.
Vitrified Clay Belled pups set in the manhole base wall shall be set flush with the exterior of the wall. The “speed-seal” on the spigot end shall be cut off prior to setting. Unless specified on the approved plans, there shall be a 0.10-foot drop constructed across the manhole base.
The top of the base shall be formed to accept the first barrel section; wet setting is not permitted. Ram neck shall be installed on this first joint after the City inspector has approved the manhole base for stacking.
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Public Works Construction Standards Section 12
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The concrete on cast-in-place bases plus a 1 foot barrel section shall cure a minimum of 24 hours before stacking the remaining barrel sections.
Adjusting Manholes
The manhole neck and frame shall be adjusted to grade and be a maximum of 18 inches.
Use of metal grade rings is not permitted.
Frame and Lid
The manhole frame and lid shall be sealed with an approved rubber gasket, as required.
Manholes constructed in streets shall have the lid bolt holes filled with silicone. Manholes constructed outside of the street or paved area shall be bolted down or closed by other locking mechanism.
Manhole Coatings
Approved materials include epoxy or calcium aluminate.
Epoxy Coating - Sewer manholes requiring an epoxy coating shall first pass a vacuum test, per these Standards, and shall then be constructed as follows:
The exterior of the manhole shall be coated with an asphaltic material and wrapped in 8 mil polyethylene sheeting prior to backfilling. Use 10 mil vinyl tape to secure and seal the polyethylene per Section 12.6 of these Standards.
All voids and imperfections in the interior of the manhole shall be mortared or “sacked” smooth with a cement paste composed of 50% Portland cement and 50% sand. The mortar mixture shall be manually worked into the dampened surface with sufficient pressure to completely fill voids and imperfections. The surface shall then be finished smooth.
This process shall be continued until the entire manhole surface (base, barrel, cone, neck and joints) is smooth and free of imperfections. Note that it is not required to cover the entire interior surface area of the manhole, only where voids or imperfections exist.
Upon receiving the City’s approval of the sacking, the outlet channel(s) of the manhole to be epoxied and the first upstream manhole shall be mechanically plugged to prevent water flow. The newly sacked manhole shall cure for a period of 28 days.
The epoxy coating and applicator’s certification must be submitted to the City for approval.
The approved coating may be applied after the 28 day curing period has ended. An accepted method of epoxy application is as follows:
1. Mask off the metal frame.
2. Sandblast the interior concrete surfaces of the sewer manhole.
3. Apply a sealer/primer approved by the City and allow curing per the manufacturer’s recommendations. Application may be withheld if, in the opinion of the City, the walls of the manhole exceed the recommended moisture content. A visqueen test may be performed to determine the absence of moisture.
4. Apply an approved epoxy to obtain a minimum thickness of 80 mils and allow curing per the manufacturer’s recommendations.
5. Verify the thickness and adherence of the coating by coring samples, to the satisfaction of the City.
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6. Repair the sampled areas and allow the repairs to cure.
7. “Spark test” the entire epoxy surface area. The electrode shall provide a minimum of 10,000 volts. Areas failing the spark test shall be removed, repaired and retested.
8. After approval from the City remove the masking from the metal frame and use “Sikaflex” (or approved equal) sealant to caulk to transition joint between the epoxy coating and the metal frame.
9. Use “Sikaflex” (or approved equal) sealant at the concrete PVC interface and for all epoxy transitions.
10. Remove the plugs.
Calcium aluminate - Calcium aluminate may be used in lieu of epoxy coating. The manhole shall pass a vacuum test, per these standards. Calcium aluminate shall be SewperCoat by Kerneos Aluminate Technologies or approved equal and shall be installed per manufacture specifications. Whenever Calcium Aluminate is used, the contractor shall immediately TV the sewer line to ensure no grout entered the line during application. Use “Sikaflex” (or approved equal) sealant at the concrete VCP interface and for all epoxy transitions.
12.17 Service Installation
Sewer services shall be installed in accordance with Standard Details SS-03 and SS-04.
Sewer services originating from sewer mains 14 feet in depth or greater shall have the crotch on the “Y” fitting filled with concrete.
12.18 Testing Procedures
Sewer Mains and Services
Public and private sewer mains and services shall be air-tested per ASTM C828 by the Contractor and the Contractor shall provide closed circuit TV inspection, after installation of the joint trench utility crossings and subgrade elevations have been met. Additionally, pipeline segments beneath road bases to be lime- treated shall be tested before and after the lime treatment process.
Air Pressure Test
Sewer mains and laterals shall be pressure tested in accordance with the National Clay Pipe Institute recommended guidelines with the following amendment:
Minimum test time shall be 60 seconds.
For mains installed in an area where the water table is higher than the pipe, the test pressure shall be increased 0.5 PSI per foot of water over the pipe.
The test gauge shall be liquid-filled, capable of testing up to 15 PSI, and graduated to 1/10 PSI.
CCTV Inspection
TV inspection of sewer mains and services shall be performed by the Contractor. Costs for said inspection shall be borne by the Contractor.
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The sewer system shall be completely cleaned by an approved method such as hydroflushing with a vactor truck prior to TV inspection. The sewer system shall be rejected if any of the following conditions exist:
1. Standing water or sags based on pipe size at warranty Table 12-4 Minimum Sag per Pipe Size
PIPE SIZE Inch per 25 feet
21-inch or less 1
24-inch to 36 inch 1.5
42-inch or larger 2
2. Standing water in services.
3. Offset joints.
4. Joint separations greater than ½ inch wide.
5. Damaged pipe.
Inspection Criteria for Coated Ductile Iron Pipe
All ductile iron sewer will have the following additional inspection requirements.
The condition of the barrel section of pipe as well as 360° at each joint shall be recorded to a DVD or portable drive. Once completed and the inspection demonstrates the pipe meets the City’s standards, the contractor may proceed with the backfill of the trench. The Contractor shall provide the DVD and a map of the section inspected, to the City for review prior to the City’s acceptance inspection. Acceptance does not relieve the contractor or developer from responsibility from defect.
Upon finding any deficiency in the pipe which does not meet the standards of the City, it is strongly encouraged that the contractor makes the necessary corrections at that time. If deficiencies aren’t corrected City forces at time of acceptance CCTV will identify these deficiencies and require the contractor to dig and replace the pipe sections; there will be no exceptions.
The observation data on the DVD provided to the City shall include the following:
1. City wide job number
2. Encroachment Permit number
3. Project Name
4. Location (Street name and cross streets)
5. Manhole numbers (based on approved plan set or City asset numbers)
6. Direction of inspection (upstream or downstream)
7. Date of Inspection
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8. The speed of travel shall be slow enough to inspect each pipe joint, wye connection, coating integrity, and potential sags. Camera speed should travel at a rate of no more than 30 feet per minute. The camera speed shall be steady and slow enough to record features and defects.
Manholes
Sewer manholes shall pass a vacuum test consisting of the following criteria and procedures.
1. The test shall be performed after assembly of the manhole and installation of the pipe entering or exiting the manhole, but prior to backfilling. The Contractor shall perform the test and supply all test equipment. The City Inspector shall witness the test results.
2. Lift holes shall be filled with non-shrink grout prior to testing.
3. Pipe entering and exiting the manhole shall be plugged. The plug shall be places on the flex joint outside of the manhole base. Securely brace the plugs to prevent them from being drawn into the manhole. Unused channels shall be permanently plugged with a plastic or clay stopper.
4. A vacuum of 10 inches of mercury shall be drawn to start the test. The amount of time required for the vacuum to drop to 9 inches shall be measured. The manhole will pass the test if the amount of elapsed time is greater than 60 seconds for a 48 inch manhole, 75 seconds for a 60 inch manhole, 90 seconds for a 72 inch manhole and 120 seconds for an 84 inch manhole. A liquid-filled vacuum gauge shall be used for testing. All detectable leaks shall be repaired with non- shrink grout while the vacuum is drawn. No mortar shall be applied to the inside of the manhole until the vacuum test has passed.
5. If the manhole fails the initial test, necessary repairs shall be made with a non-shrink grout while the vacuum is still being drawn. Retesting shall proceed until elapsed times are satisfactory. After passing the vacuum test, all joints shall then be mortared, inside and out. Outside mortared joints shall be allowed to dry 24 hours or as approved by the City before backfilling.
6. If damage to the manhole is evident any time during the construction the City may require repairs to be made on the manhole which will require a new vacuum test prior to acceptance.
Topside Improvements
When all water, recycled water and sewer infrastructures have passed air, vacuum, pressure and continuity test as well as CCTV inspection the City indicating that the project is ready for road bases and top side improvements only. This does not constitute approval for use of the infrastructure.
Tying Into the City System
A tie-in procedure shall be submitted and approved by the City prior to the proposed work.
The contractor shall allow for up to 7 days for review of the procedures by the City. The sewer system shall be tied into the City system within 10 working days upon completing and passing all the testing procedures. Tie-ins shall be conducted as specified in these Standards.
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12.19 Repairing Installed Improvements
Sewer mains, services, manholes and appurtenances shall be repaired per these Standards and by the following procedures:
1. Repairing Pipe: Damaged Pipe shall be exposed and replaced in kind. Sagging or misaligned pipe shall be exposed and corrected in place if possible. If the pipe is defective, then a new pipe shall be installed. After the correction has been completed, the excavation shall be backfilled and compacted to grade as specified. The repairs shall then be retested and reinspected via CCTV per these Standards.
12.20 Abandoning Sewer Stubs and Services
In new construction, sewer stubs and services to be abandoned shall be removed to the main or manhole of origination. The abandonment of existing sewer stubs shall be as directed by the City.
12.21 Materials
Manholes
Manholes, frames, and covers are to be in accordance with details SS-01. All materials used in cast-in-place concrete or precast concrete shall conform to ASTM C-150 Specifications with Type V cement for sulfate protection.
Manhole Barrels, Cones and Lids
All manhole frames and covers shall be of cast iron or ductile iron and conform to the ASTM designation A 48, C478 or ASTM 536 and shall be the following or approved equal. All lids shall have an “S” embossed in the center or marked “Sanitary Sewer.” D&L Supply #A-1021
Southbay Foundry #1900
If short frame and covers are approved:
D&L Supply # A-1022 , 1023
South Bay Foundry #1922
Appurtenances
Air Release Valve - APCO Model 450 or approved equal
Trench Dam - controlled density fill.
Cleanout Caps – Threaded ABS or approved equal.
Couplings - For4 inch lines, use Flex Seal Repair Coupling for ABS cap only, or approved equal.
For 4 to 12 inch lines, use Mission Rubber Repair Coupling, Calder Coupling or approved equal. Couplings may not be used in new construction.
Flange Gaskets - All flange gaskets to be neoprene rubber or red rubber, USSO Standard B.16.21 insulation flange kits—Calpico Type E full-faced gasket and two-side insulation.
Joint Sealing Compounds - Ram-Nek, Con Seal Compound or approved equal.
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Mortar - Non-shrink grout during manhole vacuum testing and as specified. Standard mortar mix for all other applications.
Silicone – 100% clear silicone with a 25-year life or approved equal.
MH Coatings - Hydro Pox 204 or approved equal, Calcium aluminate.
Wastewater Marking Tap - Terra Tape Extra Stretch 450 Material, detectable, 12 inch wide or approved equal. Non-Detectable for sewer force mains.
Oil/Grease Interceptor - Jensen Precast or approved equal.
Reinforcement Bar - Rebar shall be grade 40 steel, deformed type. Smooth bar shall not be allowed. All rebar shall be number four unless otherwise specified on the plans.
12.22 Illegal Use of Sewer System
Gridley’s Municipal Code prohibits discharge of rainwater, stormwater, groundwater, and surface drainage into the sewer system.
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Drainage
13.1 General
This Section is formulated to clearly define acceptable drainage analysis and design criteria for development in the City. Drainage materials and or facilities not covered in this Section shall conform to the Caltrans Highway Design Manual, Reclamation District’s 833 and 2056 requirements (depending on which Reclamation District (RD) the project drains to), and good engineering practice.
Storm water quality design calculations and an operations and maintenance plan shall be included in the drainage report.
Drainage improvements include: culverts, drop inlets, lined and unlined channels, manholes, stormwater quality control measures, outlet and inlet structures, detention and retention facilities, pump stations, and storm drain pipe. These improvements shall be installed in accordance with the approved improvement plans and these Standards. These Standards shall apply to the public right of way and easements and private on-site drainage improvements.
Several items within this section shall apply to on-site improvements and in conformance to stormwater quality requirements.
Storm Water Pollution Prevention Plans (SWPPP’s), as defined by the State, shall not be required for projects with a disturbed area smaller than 1 acre in size, provided the project is not part of a larger project. An erosion and sediment control plan shall be required as part of the project improvement plan submittal that identifies temporary Best Management Practices (BMP’s) to be used during construction.
13.2 City Policies and Requirements
All residential lots shall have minimum pad elevations of one foot above the 100-year, 24-hour duration water surface elevation and all commercial sites shall have minimum finished elevations of one foot above the 100-year, 24-hour duration water surface elevation. The consulting engineer shall submit an analysis determining the 100-year, 24-hour duration water surface elevation assuming failure of the underground drainage system serving that area to be developed. This requires the Consulting Engineer to show that the project will provide an overland release for all projects for the 100-year, 24-hour duration storm frequency (1% exceedance probability).
The overland release path shall be constructed in a manner to transport the peak rate runoff from the 100-year, 24-hour duration storm through the site or street assuming all underground storm drains are inoperative, all upstream areas are fully developed, and that the antecedent runoff condition (ARC) of the tributary watershed is ARC II. Streets, parking lots, playgrounds, pedestrian areas, pedestrian walkways, utility easements, and other open space areas may be considered compatible uses within the overland release path.
Except for single family or duplex residential lots, site drainage shall be collected on-site and conveyed via an underground storm drain system to an approved, existing storm drainage system without flowing into existing street gutters or existing roadside ditches.
Peak flows for a 10-year and 100-year, 24-hour duration rainfall events shall not be increased downstream of the project at that location the undeveloped (existing) project site discharges.
The Consulting Engineer shall show that the project will not increase 10 and 100-year, 24-hour City of Gridley
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storm duration peak flows. Unless regional storm water mitigation devices are available, project specific mitigation shall be required, shall be located on-site, and shall be maintained by the landowner unless otherwise mutually agreed to be dedicated to the City for maintenance by the City and Developer. Any features that are to be dedicated to the City may only be done so through the creation of a maintenance assessment district. Mitigation devices include, but are not limited to, surface and subsurface detention basins, and retention basins. A hydromodification report will be required to demonstrate to the City that no increase in runoff is incurred from development with the proposed mitigation devices.
The City of Gridley is a participant in the National Flood Insurance Program (NFIP) and all development in the City shall comply with the regulations of the Federal Emergency Management Agency (FEMA).
All drainage design and reports shall be submitted for approval by the City Engineer.
13.3 Drainage Diversions
The diversion of natural drainage is allowable only within the limits of the proposed improvement. All drainage must enter and leave the improved area at its original horizontal and vertical alignment unless an agreement approved by the City Attorney, has been executed with the affected property owners. Temporary drainage diversions during construction shall be approved by the City Engineer and shall be located and constructed in such a fashion as to permit their removal when necessary for the prevention of damage to adjoining properties.
13.4 Drainage Easements
Publicly owned drainage conduits and channels will not be allowed on private property unless they lie within a dedicated public drainage easement. Where minor improvement of an existing channel falls on adjacent property (such as daylighting a ditch profile) a notarized right-of-entry from the property owner(s) for such construction shall be required. A copy of the document which grants such approval shall be submitted to the City Engineer prior to the approval of the improvement plans.
Easements for closed conduits shall meet the following width criteria:
1. All easements for closed conduits shall have a minimum width in feet equal to the required trench width according to the standard detail for unshored trenches and excavation backfill plus 2 additional feet of width for every foot of depth as measured from the bottom of the pipe to finish grade. All conduits shall be centered within their easements.
2. Minimum width of any easement for closed conduit shall be 15 feet.
Easements adjacent to property lines shall be located entirely on one parcel.
Drainage easements for open channels shall have significant width to accommodate the following criteria:
1. Contain the channel and channel slopes.
2. Provide for fencing, where required.
3. A 15 foot wide service road and maintenance access ramps.
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A service road may not be required where the channel bottom is lined, and a suitable access ramp is provided. Dedication of easements shall be completed and submitted to the City Engineer with copies of deeds or title reports for the affected properties before improvement plans will be approved.
Open channels (natural or man-made) with a drainage area that exceeds 300 acres shall have the 100-year, 24-hour water surface elevation limits dedicated to the City in-fee or as a Flood Water Conservation Easement.
13.5 Drainage Capacity/Design
All drainage systems shall be designed to accommodate the ultimate development of the entire upstream watershed. The 10-year 24-hour duration peak storm discharge shall be used in the design of local drainage systems. In addition, other facilities such as streets, bridges, open channels, and buildings have requirements that relate to the 100-year peak storm discharge.
The Consulting Engineer shall calculate the 10 & 100-year peak discharge for a 24-hour duration storm and submit these calculations along with the plans for all proposed drainage systems.
13.6 Design Peak Discharge Methods
The acceptable method for the determination of runoff peak flows and volumes for the 10, & 100-year, 24-hour duration storms is the United States Department of Agriculture Natural Resource Conservation Service’s Technical Release 55 (TR-55), Urban Hydrology for Small Watersheds. The following shall apply in developing the hydrologic calculations:
The Tabular Hydrograph Method shall be used in the analysis. The graphical peak discharge method is not allowed.
The regional rainfall time distribution used shall be Type 1A.
The Antecedent Runoff Condition (ARC) used in the hydrologic analysis shall be the average ARC.
Tables 2-2b and 2-2c, Runoff curve numbers for cultivated agriculture lands and Runoff curve numbers for other agriculture lands shall be used in determining Runoff Curve Numbers (RCN) for existing (undeveloped) conditions.
Table 2-2a, Runoff curve numbers for urban areas, shall be used in determining RCN’s for developed conditions.
The Consulting Engineer may use other methods for determining peak flows and volumes and developing hydrographs with the approval of the City Engineer.
13.7 Hydraulic Standards for Drainage Systems
All storm drain pipelines and open channels shall be designed to convey the maximum design peak runoff calculated per these Standards and shall conform to the following requirements:
Hydraulic Grade Line
The hydraulic grade line for the 10-year discharge shall be a minimum of one foot below all inlet grates, manhole covers, and all other drainage structures in the system. The hydraulic grade line shall be shown on the plans when it is above the top of the pipe.
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Manning’s Formula
Manning’s formula shall be used to compute capacities of all open and closed conduits other than culverts. A minimum “n” value of 0.015 shall be used for sizing conduits.
Minimum velocity in closed conduits shall be 2 feet per second. Maximum velocity shall be 12 feet per second.
13.8 Street Inundation Requirements
City streets are allowed to convey runoff for storm events larger than the 10-year 24-hour event. The standards for street inundations are specified in Table 13-1. The Consulting Engineer shall provide calculations and an exhibit showing that these standards are met. Street inundation calculations will assume the pipe system is fully functional.
Table 13-1 Street Inundation Standards
Street 10-Year Storm 100-Year Storm
Minor Residential -
Continuous Grade
(Uphill/Downhill)
Traveled lanes remain clear and do not
carry storm water.
Maximum depth at gutter flow line shall
not exceed 4 inches above the top–backof-curb or a max of 10 inches.
Maximum depth at centerline shall be 4
inches
Minor Residential -
Sag Points
Storm water elevation does not exceed
top back of curb or back of sidewalk.
Maximum depth in traveled way shall be
6 inches.
Centerline shall be dry.
Storm water is a maximum of one foot
below building pads.
Ponding does not exceed more than 120
feet from inlets along any street.
Collector/Industrial -
Continuous Grade
(Uphill/Downhill)
Traveled lanes remain clear and do not
carry storm water.
Storm water flow is contained within the
right-of-way.
The center 12 feet of roadway shall remain
clear of storm water.
Collector/Industrial -
Sag Points
Storm water elevation does not exceed top
back of curb or sidewalk.
Maximum depth in traveled way shall be
6 inches.
Centerline shall be dry.
Storm water flow is contained within the
right-of-way.
The center 12 feet of roadway shall remain
clear of storm water.
Note: If the roadway is separated by a
median, then each half of the roadway shall
maintain a 12 foot clear path of travel.
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Street 10-Year Storm 100-Year Storm
Arterials -
Continuous grade
(Uphill and
Downhill) or Sag
Points
Traveled lanes remain clear and do not carry
storm water.
All travel lanes are clear of storm water
flow.
Bike lanes are allowed to be inundated.
Storm flow contained within the right-ofway.
13.9 Closed Conduits
The specific type of pipe or alternate pipe to be used in any development shall be shown on the approved plans. If the Consulting Engineer proposes to use any type of pipe not shown on the approved plans, the plans shall be resubmitted to the City Engineer for approval.
Size and Material
Drainage systems to be maintained by the City shall have a minimum pipe diameter of 12 inches. Private, onsite drainage systems that are reviewed by the City shall have a minimum pipe diameter of 8 inches. The types of pipe materials that are allowed are stated later in these standards.
Cover Requirements
A minimum cover of 36 inches and a maximum cover of 60 inches shall be maintained as measured from the outside bell of the pipe to the pavement or final grade.
In fill areas, or in areas with poor soil conditions where it is anticipated that a good, firm, vertical-walled trench cannot be constructed, the Consulting Engineer shall design the pipe structural requirements in accordance with good engineering practice and manufacturers recommendations. If trench conditions are uncertain, a note shall be placed on the plans, making it the Contractor’s responsibility to work with the Consulting Engineer to determine and place the proper strength pipe if poor trench conditions are encountered.
Alignment
Pipelines for storm drainage shall have a constant slope between manholes, junction boxes, and/or catch basins. Minimum radius of horizontal curvature shall be 200 feet. In no case shall the radius of curvature be less than the manufacturer’s recommendations for the particular pipe size under consideration.
Drainage pipelines shall be located in the street whenever possible. The location of storm drainage pipelines in the streets shall be 5 feet north or west of and parallel with the street centerline. A minimum angle of 90 degrees shall be accommodated for downstream flow around bends, tees, and connection points.
When storm drainage pipes are to be placed in existing streets, factors such as curbs, gutters, sidewalks, traffic conditions, pavement conditions, future street improvement plans, and existing utilities shall be considered.
Open ditches, lined channels, swales, and floodplain areas shall be maintained as nearly as possible in their existing alignment. When an open ditch is to be constructed parallel to an existing roadway, the ditch shall be constructed outside the proposed right-of-way of the ultimate street development.
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13.10 Manholes
Standard precast concrete manholes shall be constructed as required. Where special manholes or junction boxes are required, the City Engineer must accept the design. In no case will junction boxes or manholes be allowed which are smaller than 48 inches inside diameter. Manholes shall be located at junction points, angle points, changes in gradient, changes in conduit size, end of curves and beginning of curves. Manholes or junction boxes will not be required for reach of pipe less than 80 feet in length that is to be connected to a 36 inch or larger diameter pipe, subject to approval of the City Engineer. For straight alignment, the spacing of manholes shall not exceed 500 feet. The spacing of manholes shall be nearly equal whenever possible. On curved pipe, spacing of manholes shall be as specified in Table 13-2:
Table 13-2 Manhole Spacing
Radius (ft) Pipe Diameter (in) Spacing (ft)
400 OR LESS
GREATER THAN 400
GREATER THAN 400
ALL
24 OR LESS
GREATER THAN 24
300
400
500
Covers
All manholes and junction boxes, other than inlets, shall have standard manhole covers per the Standard Drawings. No pipe will be allowed to enter a manhole into the transition portion of the manhole cone. Manholes will not be allowed in gutter flow line except where approved by the City Engineer. Slotted manhole covers may be used to pick up minor drainage in non-traffic areas.
Buoyancy Resistance
The City experiences elevated groundwater conditions throughout the year, with peak groundwater levels occurring during the irrigation season The Contractor or Developer’s Engineer shall submit buoyancy calculations for review demonstrating adequate resistance to uplift.
Buoyancy calculations shall:
1. Assume the groundwater elevation is at finished grade unless otherwise approved by the City Engineer.
2. Assume the manhole is empty.
3. Include buoyant uplift forces based on displaced volume.
4. Include resisting forces from the weight of the structure, soil cover, concrete collars, anti-float collars, ballast slabs, or other approved anchorage systems.
5. Demonstrate a minimum factor of safety against flotation of 1.10.
Where buoyancy calculations indicate insufficient resistance to flotation, the design shall include one or more of the following:
1. Enlarged precast base section
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2. Cast-in-place anti-float collar
3. Reinforced concrete ballast slab
4. Mechanical anchorage system
5. Other approved anti-flotation measures
The City may require a geotechnical evaluation to establish groundwater elevations and soil conditions.
13.11 Inlets
Drop inlets in streets shall be located on property lines in residential subdivisions except at intersections, where they shall be placed at curb returns. Inlets shall be such that the length of the flow in the gutter does not exceed 500 feet. The depth of flow in the gutter at the inlet shall not exceed 4.0 inches in a 10- year storm and shall not encroach into the traveled ways as specified in Table 13-1 for other design storms. The design runoff flow rate shall include any flow that bypasses upstream inlets.
All inlets located with the right-of-way or easements shall conform to the City Standards. Inlets may be modified for use without curb sections for on-site drainage. Where an inlet is proposed in public streets and sidewalk is not constructed adjacent to the back of curb, a concrete collar shall be placed behind the inlet.
Drop inlets draining public streets may be connected directly to a trunk line 36 inches in diameter or larger by means of a lateral not exceeding 15 inches in diameter and 80 feet in length. Connections to the pipe shall be cored and a boot is required for a watertight seal.
13.12 Inlet and Outlet Structure
The requirements for these facilities are as follows:
Headwalls, Wingwalls, Flared End Sections, and Endwalls All headwalls, wingwalls, endwalls, preformed end sections, guard rails and bank protection shall be considered individually and shall be, in general, designed in accordance with the Standard Specifications and Standard Plans of the California Department of Transportation.
Metal beam guardrails or chain link fencing may be required by the City Engineer at culverts, headwalls, box culverts, and steep side slopes.
Pipe outlet and inlet flared ends that are less or equal to 30 inches in diameter should be HDPE.
Trash Racks and Access Control Racks
Trash racks shall be provided where they are necessary to prevent clogging of culverts, storm drains, and to eliminate hazards. Access Control Racks shall be required on all pipes, 24 inches or larger in diameter. Trask Racks located within vaults shall be automated and self-cleaning.
13.13 Drainage Pumps
Drainage pumps shall be avoided whenever possible and used only with specific approval of the City Engineer. If the use of drainage pumps is permitted, the drainage system shall be designed City of Gridley
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to provide for gravity outfall during the summer months and other periods of low water stages.
If a low stage gravity outfall is impossible or impractical, an alternative pump of a smaller capacity for low stage flow may be used provided the City Engineer grants specific approval.
13.14 Channels and Outfall Design
Drainage shall be conveyed in an open channel if the drainage area exceeds 300 acres.
Residential lots adjacent to open channels shall have minimum pad elevations of two feet above the 100-year water surface elevation. Non-residential lots shall have the lowest ground elevation adjacent to the building foundation at least two feet above the 100-year water surface elevation.
Open Channel Design Requirements
Channels shall be constructed into a typical cross section. Fully lined channels shall be designed with side slopes of 1:1 or flatter. Channels with unlined sides shall be designed with side slopes of 3:1 or flatter, or as specified by the Geotechnical Engineer based on existing soil conditions. Lined channels shall have a minimum bottom width of 6 feet. Lined channels shall be finished concrete, sacked concrete, or dowelled and sacked concrete. The minimum weight of sacked concrete shall be 60 pounds per bag. Unlined channels shall be designed with a minimum “n” value of 0.065.
All open channels shall be designed to carry the 100-year frequency design storm. The hydraulic grade line of the 10 and 100-year storms shall be calculated and plotted on all channel profiles. Freeboard shall be a minimum of one foot for the 100-year event and two feet when the drainage area exceeds 300 acres. The velocity range shall be 2.5 to 6.0 feet per second in unlined open channels and 3.0 to 12.0 feet per second in lined open channels.
All computations shall be clearly documented and submitted to the City Engineer for approval.
For all channels, either realigned, or natural, the following shall be shown on the improvement plans in addition to the information heretofore required:
1. The profile of existing channels shall be shown for a minimum of 1000 feet at each end of the development on the construction plan to establish a minimum profile grade.
2. Typical sections and cross sections.
Interceptor Ditches
Interceptor ditches or approved alternates shall be placed at the top of the cut or bank where deemed necessary by the City Engineer to prevent erosion of the channel bank.
Runoff shall not be allowed to sheet flow over the top of banks.
Outfall Profiles
All drainage outfalls shall be shown both in the plan and profile view, on the improvement plans for 1000 feet or until a definite “daylight” condition is established. All drainage ditches upstream of the improvement shall be shown on the plan and profile sheets for a distance of at least 500 feet or until an average profile grade through the improvement is established. The profiles shall include ditch flow line and top of bank elevations.
When improvements have more than one unit, the drainage outfall shall be shown as extending to the property boundary and beyond if required, although it may not be City of Gridley
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constructed with the current unit development. All temporary outfalls shall be shown both in plan and profile view, on the improvement plans.
Fencing
Channels exceeding 3 feet in depth and with side slopes steeper than 3:1 shall be fenced with a 6 foot high chain link fence per the Caltrans Standards. In all other areas, fencing shall be placed as specified the City Engineer. Fences shall be located 6 inches inside the drainage easement lines and a minimum of 12 inches from the top bank. No fencing shall be allowed within the limits of the 100-year floodplain of an open watercourse without the approval of the City Engineer. Special requirements shall be specified by the City Engineer for fencing within the 100-year floodplain of any open watercourse.
Drive gates shall be provided with a minimum width of 12 feet. A minimum 4 foot wide walk gate shall also be provided.
Access Roads
An all-weather access road consisting of 6 inches of compacted AB shall be provided adjacent to all channels and outfall ditches to the satisfaction of the City Engineer. Access roads shall have a minimum width of 12 feet and shall provide a bulb at end for turning movements.
13.15 Cross Culvert and Bridges
This section specifies criteria for relatively short circular or box culverts and bridges for transverse crossings (typically road or railroad embankments). Cross culverts shall be of the same material as allowed for closed conduits.
Cross culvert profiles will be determined on an examination of the channel for a minimum distance of 1000 feet on each side of the installation.
Driveway culverts shall be approved by the City for size, grade, alignment and type. Driveway culverts will not be allowed unless the City has agreed to deter the construction of the curb and gutter unless it is for temporary construction access.
New culverts or bridges for roadways that cross the floodplain shall incorporate provisions for the installation of permanent stream measuring equipment. This shall be comprised of a 10 foot x 10 foot flat pad near the 100-year water surface elevation with vehicle access. A 2 inch diameter electrical conduit from the pad to the flow line of the channel will be installed.
Design Storm
Cross culvert size shall be determined on the basis of runoff as specified in the hydrology portion of this section. Cross culverts shall be sized for the 100-year storm with a minimum of one foot of freeboard below the lowest travel lane. They shall also be sized such that no serious damage will be incurred due to ponding as a result of a 100-year event. A flood easement shall be provided for all areas impacted due to upstream ponding in the 100-year event. The minimum diameter of cross culverts shall be 18 inches.
To account for debris collection, a clogging factor of 150% shall be applied to the design storm in the design of bridges or culverts that cross a channel or stream with a drainage area that exceeds 300 acres.
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Hydraulics
Inlet or outlet conditions control flow in transverse culverts. In culverts operating under inlet control, the cross-section area of the culvert barrel, the inlet geometry and the amount of headwater at the entrance are of primary importance. Outlet control involves the additional consideration of the elevation of the tailwater in the outlet channel and the slope, roughness and length of the culvert barrel.
Anticipated downstream flow depth and allowable headwater depth govern the available head on culverts. The type of flow under which a culvert will operate may be determined from a given set of conditions.
In the analysis of transverse culverts, the United States Federal Highway Administration (FHWA) methods for hydraulic design as detailed in the FHWA’s Hydraulic Design Series Number 5 shall be used.
13.16 Detention and Retention Basins
Detention and retention basins that are intended to be dedicated to the City shall minimize its maintenance time and cost. This will be key factor in the approval of the basin’s O&M Plan by the City Engineer.
13.17 Access for Maintenance
These facilities may include, but are not limited to bridges, culverts, headwalls, lined and unlined channels/ditches, sand/oil separators, manholes, detention basin, retention basins and drain inlets. The access way shall be a minimum 12 feet wide and include 6 inches of ¾ inch aggregate base (95% relative compaction) over 6 inches of processed, native soil (95% relative compaction. Upon the City Engineer’s request, 4 inches of asphalt concrete shall be added to the section and/or a cul-de-sac with a minimum diameter of 75 feet.
13.18 Submittal Requirement for all Drainage Studies
The Consulting Engineer will submit the signed and sealed drainage study for review and approval by the City Engineer in PDF format. The study shall include the following:
• Title sheet with the project name, developers name and contact information, and the Consulting Engineer’s name and contact information.
• Location map
• Site plan
• Preliminary grading and drainage plan
• Existing conditions catchment map
• Developed conditions catchment map
• Methodology section describing both existing and developed conditions assumptions and inputs
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• Results section with summary tables of peak flows for both existing and developed conditions
• Hydromodification study (if required) to demonstrate no increase in peak runoff • Conclusion
The Consulting Engineer shall electronically submit all models and results developed for the project.
13.19 Drop Inlet Installation
Drop inlet installations shall conform to Standard Details, these standards, and the most recent of Caltrans Standard Specifications. The interior of the drop inlet shall have a troweled finish; rock pockets shall be grouted and brushed; exposed top surfaces shall have a Class I Surface Finish. Within all City streets and easements and within all commercial sites and private residential subdivisions, a fish stamp conforming to the Standard Details shall be placed adjacent to all drop inlets. If the storm drain system is active and open to discharges, then immediately following installation, all storm drain inlets shall be protected with sediment control protection until construction no longer poses a risk of sediment discharges. Drop Inlets shall conform to ASTM C913. Otherwise, unused knockouts shall be grouted to wall thickness dimension.
13.20 Manhole Installation
Precast
Precast concrete structures shall be of approved design and sufficient strength to withstand the loads to be imposed upon them. Precast concrete walls for catch basins shall be 6 inch thickness except at knockouts where the minimum thickness shall be 2 inches. Precast bases shall be placed on a foundation of 3⁄4 inch minus crushed rock or class 2 aggregate base, a minimum of 6 inches thick, compacted to 95 percent relative compaction. Elevation differentials of inlets and outlets shall conform to the approved improvement plans.
Openings in the base shall align true with all inlet and outlet pipes. Stub out or couplings provided in precast bases shall be of the same material as the pipe to which they connect, unless otherwise approved by the City’s Inspector. Precast bases shall be furnished with cutouts or knockouts. Unused knockouts shall be submitted to City Engineer prior to construction. Pipes shall be installed only in factory knockouts unless otherwise approved by the City Engineer. Maximum Knockout or cutout hole-size shall not be greater than the sum of the outer pipe diameter plus the catch basin wall thickness.
Cast-in-Place Base
The cast-in-place base portion shall not be placed higher than 6 inches above the outside tops of the main incoming and outgoing pipes.
The wall thicknesses for the top of the cast-in-place base sections shall conform to the following table:
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Table 13-3 Manhole Thickness
Manhole Diameter (in) Minimum Wall Thickness (in)
48 4
60 6
72 7
84 8
96 9
Inside diameters of cast-in-place base portions shall equal the inside diameter of the manhole specified. Standard precast manhole riser sections and/or cones shall be placed above the cast-in-place section to bring the manhole rim to finish grade. Upon pouring the concrete base, the top surface of the cast in place base barrel shall be stamped with a rigid impression ring in order to match it up with the above, precast barrel section. As an alternate, a maximum 1 foot barrel section may be stacked when it is determined that the concrete for the base is adequately stiff.
A 24-hour minimum curing time is required before manhole stacking is allowed.
All inlets and outlets with a 30 inch inside diameter or smaller, connecting to existing manholes, shall be core bored.
Concrete in the cast-in-place portion shall be placed against undisturbed earth. All loose material shall be removed from the excavation prior to installation.
Cones
Cone tops shall be placed within 18 inches of final street grade. Where depth is insufficient for cones, flat slab tops shall be used. Flat Top slabs shall only be used when shallow pipe does not permit use of a tapered dome and requires approval by the City Engineer. Lifting rings in precast cones shall be plugged with dry packed mortar.
Joints
Joints in precast manhole sections shall be made with either mortar or plastic sealing compound.
Mortar Application - All joint surfaces and the face of the manhole base shall be thoroughly cleaned and wetted. before applying mortar. Both the inside and outside of mortared joints shall be plastered with mortar, and the inside surfaces brushed to a smooth finish with a wet brush. Special precautions shall be taken to ensure that the entire joint space is filled with mortar and is water tight.
Plastic Sealing Compound Application - All joint surfaces and the face of the manhole base shall be thoroughly cleaned before applying plastic sealing compound. The sealing compound shall be protected from dirt during application. Ends of the compound shall be joined end-to-end and not joined by overlapping. Sufficient compound shall be used to cause a visual “squeeze-out” of the compound material when adjacent sections are seated.
Squeeze-out material on the inside of the manhole shall be neatly trimmed flush with the inside surface.
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Connections
Pipe connections to drainage manholes shall be made so that the pipe is flush with the inside face of the manhole. These connections shall be finished so that entrances are smooth. Unless the manhole is cast around the pipe, connections shall be made with dry packed cement mortar inside and a 12 inch by 12 inch minor concrete collar outside. Pipe connections shall not be made into the cone section of the manhole unless shown on the approved plans.
Grade Rings
Grade adjustments shall be made using precast grade rings. Precast rings shall be a minimum of 3 inches in height. The total height of the grade rings, frame, and cover casting shall not exceed 18 inches.
Frame and Covers
The tops of frames and covers shall be set no more than 1/8 inch below finish grade pavement in the street and 6 inches above finish grade in landscape areas and 12-18 inches in unimproved, isolated areas unless otherwise shown on the approved plans. Per the Standard Details, a 12 inch deep by 12 inch wide concrete collar shall be placed around the casting, either covered by 3 inches of asphalt concrete paving in a street area, or be placed flush with the finished surface using minor concrete with a medium broom finish with pattern perpendicular to travel direction. The concrete collar shall be in conformance to minor concrete of Caltrans Standard specifications. All joints between the frame, grade rings, dome, barrels and base shall be sealed with non-shrink mortar, or an approved plastic sealing material. Inside the manhole, all joints where the sealing material is not flush with the inside wall shall be grouted with non-shrink mortar and finished/wet- brushed.
Adjusting Existing Manhole Frames
The frame shall be supported above the grade ring or dome by spacers, or by suspending with timber and wires. After the concrete collar is poured, any space between the frame and grade ring and dome shall be filled with non-shrink mortar, and the inside wall of the riser finished/wet-brushed.
13.21 Pipe Bedding
Pipes shall be placed on a firm bed of imported granular material with less than 10% passing No. 8 sieve,; 100% passing 1/2 inch sieve for all pipe or 85 to 90% Passing 1/2 inch sieve and 100% passing 3/4 inch sieve. Prior to placing pipe bedding, the trench bottom shall be free of any loose material.
13.22 Pipe Installation
All drainage improvements shall conform the following requirements:
Laying Pipe
The pipe shall be laid up-stream with the bell end of the pipe placed up-stream. The interior of the pipe shall be kept clean as the work progresses. There shall not be a change in pipe material or manufacturer between storm drain structures.
The handling, installation, and backfill of Polyvinyl Chloride (PVC), High Density Polyethylene (HDPE), Steel Reinforced High Density Polyethylene (SRHDPE), and Polypropylene pipe shall City of Gridley
Public Works Construction Standards Section 13
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conform to the manufacturer's published recommendations, Caltrans Standard Specifications, ASTM D-2321, and the City's Standard Details. Where conflicts exist between these references, the more stringent requirement shall govern. The following modifications apply:
Due to the lightweight characteristic of the pipe, extreme care shall be taken to avoid displacing the pipe during the backfilling operation.
Following placement of the pipe on the required bedding and to the required grade, the pipe shall be stabilized in place with ballast. At a minimum, this shall be accomplished by loading the pipe down slowly and carefully with small piles of embedment material to a minimum of 1 foot above the pipe on each joint and midway on each length. The pipe shall be kept centered in the trench during this operation. Every precaution shall be taken to avoid flooding the trench prior to placing backfill. The City’s Construction Inspector may require dewatering the trench to confirm pipe grade, and to retest the integrity of the pipe following trench flooding.
The trench shall be backfilled with embedment material 12 inches above the pipe, prior to continuing with the trench backfill.
Pipe material or manufacturer shall not change between manhole structures or between the last structure and the discharge/inlet opening.
The pipe run between the last structure and the discharge/inlet opening shall be reinforced concrete. Pipe stub runs from storm drain mains into commercial sites shall also be reinforced concrete.
No pipe, conduit or any other appurtenance shall be located within any existing or newly constructed storm drainpipe or culvert. Each run of storm drainpipe and culvert shall also be 100% clear and unobstructed the total length.
Non-Rigid (PVC/HDPE/SRHDPE/Polypropylene) Pipe Testing
A mandrel test shall be conducted following completion of subgrade processing and compaction for curb gutter and sidewalk and asphalt concrete pavement. Placement of curb, gutter and sidewalk and asphalt concrete pavement (and related aggregate base) shall not occur until the City Inspector has confirmed the passing of the mandrel test. The City’s Inspector shall be present through the duration of the mandrel testing.
The allowable deflection (reduction in vertical inside diameter) for all non-rigid pipes shall be 7.5% maximum. The deflection shall be tested by pulling a mandrel which is 92.5% of the inside pipe diameter through all installed pipe. The mandrel shall be the “go/no-go:” type and shall be pulled per the manufacturer’s recommendations without mechanical assistance. Prior to the mandrel test, the pipe shall be thoroughly flushed and cleaned, (See Subsection “J” below). Obstacles in the pipe shall be removed. At each location in which the mandrel cannot pass, the cause shall be ascertained. If it is found the deflection exceeds 7.5 % or that a gasket has been improperly installed, or that the pipe has been damaged due to construction activities, then the respective section of pipe shall be repaired and retested.
Pipe section repair operations may require rebedding pipe, replacing pipe, or both as needed to properly repair pipe section. Watertight repair couplings shall be used in repair. A passing mandrel retest is required.
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At the contractor’s discretion, any sections of non-rigid pipe not passing the mandrel test may be televised to evaluate the problem.
Pipe Laying Tolerances
The pipes shall be laid true to line and grade with allowed tolerances of 0.03 foot above or below the design grade and 0.10 foot left or right of the design alignment.
Cast-in-Place Concrete Pipe
Cast-in-place concrete pipe shall conform to provisions in the most recent edition of the Caltrans Standard Specifications. Where excavations for other utilities undermine installed cast in-place pipe, that excavation shall be backfilled to the spring line of the cast- in-place pipe with 2 sack slurry per these Standards.
Pavement Cutting and Repaving
When the trench line is in an existing pavement area, the pavement shall be sawed or scored and broken ahead of trenching operations.
The proper tools and equipment shall be used in marking and removal of the pavement such that it is cut accurately to a neat and parallel line on either side of the trench width required, in conformance with the Trench Cut Ordinance. All cuts in Portland cement concrete pavements shall be sawcut with equipment approved by the City’s Inspector.
Cleaning of Storm Drain System
The storm drain system shall be cleaned to the satisfaction of the City’s Inspector upon completion. If flushing is utilized, then the discharge shall not be routed into the existing City system. The downstream manhole shall be plugged and the discharge fluid shall be disposed of in a manner satisfactory to the City’s Inspector.
13.23 Channel Lining Installations
Channel lining installations shall conform to the following:
Surface Preparation
The surfaces of the areas to be lined shall be evenly graded to the lines and grade and sections as indicated on the approved plans. The surfaces shall be moistened thoroughly to prevent moisture from being drawn from the freshly placed lining.
All surfaces on which lining is to be placed shall be free from water, mud and debris and shall be firm enough to prevent contamination of the fresh lining by earth or other foreign material. Prior to placing any lining, the Contractor shall verify line and grade of the excavated channel.
Reinforcement
Welded wire fabric shall be embedded in the concrete so that it will be a minimum of 1 inch clear from either face of the concrete, unless otherwise noted.
Joints
Construction Joints – Shall be square and edged with a ¼ inch radius-edging tool. The edge shall be thoroughly wetted before the next section of lining is placed. Construction joints shall be constructed whenever the operation is halted for a period exceeding 30 minutes.
Welded wire fabric reinforcing shall extend through the construction joint.
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Deep Tool Joints - Transverse deep tool joints shall be constructed at 10 foot intervals. The aggregate shall be separated with the joint tool a minimum of 2 inches deep. Immediately following application of the deep tool joint, a ¼ inch grooving tool shall be applied to the surface to seal the joint.
Weep Holes
On channels with side lining extending more than 18 inches vertically above the channel toe, weep holes shall be constructed at intervals of 10 feet, midway between contraction joints on each side of the channel. The weep hole elevation shall be 12 inches above the adjacent toe of slope.
The holes shall be backed by a minimum of 1 cubic foot of aggregate material tied in a burlap bag.
The aggregate shall extend at least 6 inches above and below and to each side of the weep hole, and at least 10 inches into the side slope. The side and back of the burlap sack shall be protected from being coated by mortar or concrete during the lining placing operation. On the day following the lining placement, each weep hole shall be rodded to assure it has not been blocked. The weep hole shall then be cut to fit the channel slope.
Cutoff Walls
Cutoff walls shall be constructed around the perimeter at each end of the channel lining and at all locations where the new lining meets structures or existing lining, and at all other locations shown on the approved plans. The cutoff walls shall be a minimum of 6 inches thick and 18 inches in depth, as measured from the surface of the lining. The welded wire fabric shall be bent down into the cutoff walls.
Geotextile Linings
Linings shall follow the manufacture’s recommendations for preparation of soil, seed bedding, blanket orientation, anchoring details, and appropriate seed blend and application rates.
13.24 Abandoning Storm Drains
In newer construction, storm drain stubs and services to be abandoned shall be either removed to the main or manhole of origin or filled solid with concrete slurry, at the discretion of the City Engineer. The abandonment of existing storm drain stubs shall be removed or left in place as directed by the City and or as shown on the approved plans.
Temporary storm drain plugs may be used when short term blockage is necessary at either the stub or lateral run to prevent storm water from entering/existing the stub or lateral run.
Material for plugs may be a combination of 6 mil plastic and rigid plywood. For longer term plugs, and at the discretion of the City Inspector, 6 mil plastic and 1 foot thick of 2 sack concrete is required. In both cases, the plug shall be marked with a 4 inch x 4 inch temporary post.
13.25 Material
Drop Inlets
All drop inlets shall conform to the Standard Details or the most recent edition of the Caltrans specifications. Concrete shall conform to these standards.
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Manholes
All precast manhole barrels, risers, cones, flat tops and grade rings shall conform to ASTM Designation C478.
Bases - Bases shall be either precast or cast-in-place. Precast bases shall conform to ASTM Designation. Cast-in-place bases shall be of minor concrete with cementitious content of not less than 505 pounds per cubic yard, with a maximum size aggregate not greater than 1 inch or smaller than 3/8 inch, per the Caltrans Standard. Slump shall not exceed 4 inches as determined by the slump cone method of ASTM Designation C143 or an equivalent slump as determined by CTM533.
Barrels - Manhole barrels shall conform to dimensions of Jensen Precast Products or approved equal, and shall conform to ASTM Designation C478.
Cones - All cones shall be concentric (unless otherwise shown on the approved improvement plans), Jensen Precast Products and conform to ASTM Designation C478.
Joints/Mortar
Joints shall be made with either non-shrinking mortar or with a plastic sealing compound conforming to Federal Specification. Mortar shall consist of 1 cubic foot of Portland cement to 2 cubic feet of concrete sand.
Manhole Frames and Covers
All manhole frames and covers shall be of cast iron or ductile iron and conform to ASTM Designation A48, C478 or ASTM A536 for Ductile Iron or Class 30. Refer to the Standard Details for a list of recommended manufacturers and models.
Storm Drain Pipe
High Density Polyethylene Pipe (HDPE) - HDPE shall be type “S”, conforming to the most recent edition of Caltrans Standard Specifications. Joint connections shall be watertight, rubber ring gasketed. HDPE shall be Hancor (Sure-Lok F477), ADS, Inc. (N-12 Pro Link Ultra) or approved equal.
Polyvinyl Chloride Pipe (PVC) - PVC shall conform to the following standards based on pipe diameter:
Table 13-4 PVC Standards
Pipe Diameter (in) ASTM Designation
12-15 D3034, SDR 35
18-27 F794, F2241, SDR 51
30-48 F794
All PVC pipe joints shall be integral wall bell and spigot configuration, factory formed.
All rubber rings shall conform to ASTM Designation F477.
Steel Reinforced High Density Polyethylene Pipe (SRHDPE) – SRHDPE shall be manufactured in accordance with ASTM F2562 “Standard Specification for Steel Reinforced Thermoplastic Ribbed Pipe and Fittings for Non-Pressure Drainage and Sewerage”. SRHDPE shall be manufactured from high density polyethylene stress rated resins conforming to the minimum requirements of cell classification 345464 C per ASTM D3350 “Standard City of Gridley
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Specification for Polyethylene Plastic Pipes and Fittings Material”. Joints shall be watertight to an internal water pressure of 15 psi when tested in accordance with ASTM D3212 “Standard Specification for Joints for Drain and Sewer Plastic Pipes Using Flexible Elastomeric Seals”. SRHDPE shall be CONTECH (DuroMaxx) or approved equal.
Polypropylene Pipe - Pipe 12 inch – 60 inch Diameter shall conform to ASTM F2736 (12-30 inch diameters) and ASTM F2881 (36-60 inch diameters). Joints must be watertight in accordance to ASTM D3212 with gaskets meeting the requirements ASTM F477. Minimum cover shall be 36 inches cover from top of pipe bell to bottom of roadway structural section.
Maximum cover exceeding 20 feet and unpaved surfaces will be approved on a case-by-case basis at the discretion of the City Engineer. Polypropylene Pipe shall be ADS N-12 HP Pipe, or Prinsco GOLDPRO Storm Dual Wall HP Pipe, or approved equal.
Reinforced Concrete Pipe - Shall conform to ASTM designation C76 for Class I ,II, III, IV, or V.
The class of pipe shall be based on the designation conforming to the approved plans. Joints for RCP shall be bell and spigot with rubber gasket. The gasket shall conform to the Caltrans Standards.
Stormwater Treatment Devices
The use of on-site storm water treatment devices are strictly limited to smaller development projects with limited space where bio-retention facilities are not functional, at the discretion of the City Engineer.
Inlet and Outlet Structures - All inlet and outlet structures shall conform to the Construction Standard Details for drainage.
Slurry Cement Backfill - Slurry cement backfill shall conform to the requirements of the most recent Caltrans Standard Specifications containing 188 pounds of cement.
Lined Channels
All lined channels shall conform to these standards and the following materials:
Air Blown Mortar - Air blown mortar shall conform to provisions in “Shotcrete” Section of the most recent edition of Caltrans Standard Specifications.
Concrete - Concrete shall be either “Minor Concrete” with Type II cement, sacked concrete, or doweled and sacked concrete per Caltrans specifications.
Curing Compound - Curing Compound shall conform to provisions in the most recent edition of Caltrans Standard Specifications and these Design and Construction Standards.
Grouted Cobbles - Ground cobbles shall be set in 6 inches of “Minor Concrete” with pea gravel concrete. The top surface of the concrete shall be flush with adjacent finish grade.
Cobbles shall be 4-10 inches in size, with 1/3 exposed above the concrete surface, per Caltrans Specifications. Base for concrete shall be undisturbed native soil. If the soil is disturbed or undercut, it shall be processed to 90% relative compaction.
Weep Holes - All weep holes shall be 2 inches in diameter and made of: galvanized steel pipe, schedule 40 or greater; PVC pipe, schedule 40 or greater; or ABS pipe, schedule 40 or greater.
Welded Wire Fabric Reinforcement - Welded wire fabric reinforcement to conform to ASTM Designation A185.
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Metal Storm Drain Marker
“No Dumping” public notices are required at all storm drain inlets within the City limits, public and private storm drain improvements. Where conditions do not warrant as defined in the Standard Details, metal storm drain markers may be substituted as approved by the City Inspector. Metal markers shall be Almetek Industries Marker, stainless steel storm drain marker model SDM-SS “No Dumping Drains to Creek” with “fish” symbol and blue background or approved equal. Installation methods shall be per manufactures’ recommendations and approved by the City.
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Electrical
14.1 Electric Distribution Facilities
All electric distribution equipment to be connected to the Gridley electric distribution system shall conform to the requirements of the National Electric Code (NEC) and General Order No. 95 of the California Public Utilities Commission.
14.2 Extensions of City Facilities
General Policy: The City of Gridley will extend its electrical system along public roads, streets, and upon private property across, under and in satisfactory easements or rights-of-way that have been dedicated.
System expansion within the boundaries of a subdivision or other development to be served:
Construction by the Applicant: The applicant shall provide, at no cost to the City, and in accordance with City standards and specifications, all engineering, trenching, backfill, resurfacing, landscaping, conduit, secondary conductors, junction boxes, vaults, equipment pads and subsurface housings required for power distribution within the development. Upon acceptance by the City, the applicant will transfer ownership to the City.
Construction by the City: After acceptance of the facilities provided by the applicant, the City will furnish and install all transformers, primary conductors, switches, and other equipment required for the system's extension, and the cost thereof will be charged to the applicant.
Construction Charges: Charges will be as set forth by resolution of the City Council. Credit will be given for oversizing of facilities to provide for areas beyond the boundary of the development, computed on the basis of the City's costs for materials.
System extension or reinforcement outside the boundaries of a subdivision or other development to be served:
Construction by the City: The City will construct the necessary underground facilities to deliver electric power to the development site. Connection to these facilities will be subject to charges in accordance with fees established by resolution of the City Council, entitled "Utility Connection Charges."
Construction by the Applicant: Where mutually agreed, all or part of the required system extension may be constructed by the applicant in accordance with the Gridley Public Works Construction Standards.
14.3 Economic Justification of Construction
A system extension or reinforcement required by a subdivision or other development outside the present electric service area will be considered economically justified if the City's expense and investment in the construction is not greater than 2.0 times the expected gross annual revenue from the subdivision or other development.
If the City Engineer determines that the requested extension is not justified economically, the applicant shall pay as a connection charge, in addition to all other applicable charges, the amount required to reduce the City's investment in the construction to 2.0 times the expected annual gross revenue.
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The City Engineer's decision, after consideration of all available facts, will be final.
Extension of the electric distribution system to serve subdivisions or developments will be subject to budgetary considerations and approval by the City Council for any expenditure of City funds not specifically budgeted for.
14.4 Electric Service Standards
Service Connections
Only duly authorized employees of the City shall connect or disconnect the customer's service to the City's distribution system.
Electric Utility Service
It is the policy of the City of Gridley that all new electrical utility services shall be provided by underground facilities on the customer's premises. On-site electrical line shall be provided at the customer's expense and shall meet the City's specifications. Overhead service will be permitted only when underground construction, in the opinion of the City Engineer, is not feasible.
Number of Services
Only one service drop or lateral may be extended to a building or other premises to be served, except:
Two or more service laterals may be extended to a single building or premise, provided they enter the building or other structures at points at least 150-feet apart and that all wiring, other than control or metering conductors, supplied by each service is separate from and entirely independent of wiring supplied by any other source.
Two or more sets of service entrance conductors may be extended to a single switch panel for the purpose of providing additional capacity or backup protection.
Number of Service Weatherheads Per Service Drop
Not more than two service weatherheads may be serviced from a single overhead service drop.
14.5 Nonstandard or Excessive Customer Requirements:
If the customer requires nonstandard voltages or excess load and/or transformer capacity because of comparatively large loads of short duration, unusually close voltage regulation, or separate transformers to serve low-revenue loads, the customer shall pay the City the difference in cost of the installation requested by the customer and the City's standard installation.
14.6 Phase Balancing
When three-wire, single-phase or three-phase service is supplied, the load must be balanced as nearly as practicable between the two sides or several phases. In no case shall the load on one side be twice as great as the other side.
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14.7 Power Factor Correction
In the case of devices having low power factors, the customer shall provide, at his own expense, power-factor corrective equipment to increase the power-factor of any device to not less than 90 percent.
14.8 Reduced-Voltage Starting
All electric motors larger than 50 HP shall have reduced-voltage starting equipment unless this requirement is specifically waived by the Gridley Electric Department.
14.9 Electric Meter Location
All electric meters shall be installed in a location with convenient access for the Gridley Electric Department for reading, inspecting, and testing the meters. All proposed meter locations which are enclosed or restricted must be approved in advance by the Gridley Electric Department.
14.10 Customer Order Procedure
Ordering New or Additional Service
□ Large Service Requests
Requests for service to loads of 500 KVA or greater maximum demand must be approved in advance by the Gridley Electric Department. □ All Service Requests
Submit two copies of the project plot plan with definite load information for commercial and industrial installations. Furnish this information as soon as possible.
Submit two copies of load information with building plans submitted to the Department of Public Works.
Point of service will be as determined by the Gridley Electric Department.
All required fees and charges must be paid prior to connection of service or issuance of building permit.
All electrical work on the customer side of the meter must be inspected before it will be energized.
Application for service is to be made at the Public Works Office in City Hall.
14.11 Ordering Temporary Service
If temporary service is needed at a construction site, the following procedures should be followed:
1. Contact the Public Works Department.
2. Customer must sign a Customer Job Request Form.
3. Application for temporary service is to be made at the Public Works Office.
4. Customer shall furnish and install all necessary service equipment.
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5. If service is overhead, the City will install a service drop.
6. The customer will be billed actual costs for temporary installation.
DROP INLET TYPE F
DR-01 CITY OF GRIDLEY
CITY OF GRIDLEY
TYPE 2 DROP INLET
DR-02
CITY OF GRIDLEY
TYPE GO INLET
DR-03
DR-04 CITY OF GRIDLEY
NO DUMPING PUBLIC NOTICE
STANDARD PRECAST
MANHOLE
DR-05 CITY OF GRIDLEY
ACCESS CONTROL & TRASH
RACK
DR-06 CITY OF GRIDLEY
INLET TRASH RACK 33 IN.
PIPE OR LARGER
DR-07 CITY OF GRIDLEY
TRENCH DAM
CITY OF GRIDLEY DR-08
STORM DRAIN TRENCH AND
BACKFILL
DR-09 CITY OF GRIDLEY
GR-01 CITY OF GRIDLEY
RESIDENTIAL LOT GRADING
EXTERIOR PERIMETER
PROPERTY LINE GRADING
GR-02 CITY OF GRIDLEY
INTERIOR PROPERTY LINE
GRADING
GR-03 CITY OF GRIDLEY
STREET LIGHT DETAIL
CITY OF GRIDLEY MS-1
SS-01 CITY OF GRIDLEY
SANITARY SEWER MANHOLE
SS-02 CITY OF GRIDLEY
DROP MANHOLES
SS-03 CITY OF GRIDLEY
SANITARY SEWER SERVICE &
CONNECTION
SANITARY SEWER LATERAL
CLEANOUT
SS-04 CITY OF GRIDLEY
SEWER MAIN TRENCH AND
BACKFILL
SS-05 CITY OF GRIDLEY
MINOR RESIDENTIAL
STREETS ATTACHED
SIDEWALK
CITY OF GRIDLEY ST-01
COLLECTOR STREETS
ATTACHED SIDEWALK
ST-02 CITY OF GRIDLEY
ARTERIAL STREETS
ST-03 CITY OF GRIDLEY
CUL-DE-SAC STREET
ST-04 CITY OF GRIDLEY
STANDARD ELBOW
ST-05 CITY OF GRIDLEY
CURB AND GUTTER
ST-06 CITY OF GRIDLEY
CURB AND GUTTER
TRANSITION
ST-07 CITY OF GRIDLEY
CURB AND GUTTER WITH
SIDEWALK
ST-08 CITY OF GRIDLEY
VALLEY GUTTER
ST-09 CITY OF GRIDLEY
DRIVEWAY APRON WITH
ATTACHED SIDEWALK
ST-10 CITY OF GRIDLEY
ALLEY DETAIL
ST-11 CITY OF GRIDLEY
MINIMUM STRUCTURAL
SECTION
ST-12 CITY OF GRIDLEY
TEMPORARY SIDEWALK
BARRICADE
ST-13 CITY OF GRIDLEY
STUB STREET BARRICADE
ST-14 CITY OF GRIDLEY
BOXED SURVEY MONUMENT
ST-15 CITY OF GRIDLEY
COLLAPSIBLE BOLLARD
ST-16 CITY OF GRIDLEY
ST-17 CITY OF GRIDLEY
LANDSCAPE SIGHT DISTANCE
CITY OF GRIDLEY
STANDARD DRIVEWAY
CULVERT
ST-18
CITY OF GRIDLEY
DRIVEWAY APPROACH
VALLEY GUTTER
ST-19
TRENCH AND PAVING
BACKFILL AND EMBEDMENT
ST-20 CITY OF GRIDLEY
CITY OF GRIDLEY
TRENCH BEDDING AND
BACKFILL
ST-21
JOINT TRENCH
CONFIGURATIONS FOR
UTILITY COMPANIES
ST-22 CITY OF GRIDLEY
ROCK WHEEL TRENCH
ST-23 CITY OF GRIDLEY
POTHOLE RECONSTRUCTION
ST-24 CITY OF GRIDLEY
STREET SIGNS
ST-25 CITY OF GRIDLEY
CITY OF GRIDLEY
TREE AND WELL COVER
ST-26
FIRE HYDRANT
W-01 CITY OF GRIDLEY
FIRE ASSEMBLY WITH FDC
W-02 CITY OF GRIDLEY
THRUST BLOCKS
W-03 CITY OF GRIDLEY
GATE VALVE & BOX
W-04 CITY OF GRIDLEY
W-05 CITY OF GRIDLEY
LOCATING WIRE FOR WATER
MAINS AND SERVICES
SINGLE WATER SERVICE
MAIN CONNECTION
W-06 CITY OF GRIDLEY
DOUBLE WATER SERVICE
MAIN CONNECTION
W-07 CITY OF GRIDLEY
COMMERCIAL & IRRIGATION
SERVICE LINE
W-08 CITY OF GRIDLEY
W-09 CITY OF GRIDLEY
LARGE COMMERCIAL WATER
METER INSTALLATION
AIR-VACUUM VALVES
W-10 CITY OF GRIDLEY
SADDLE DETAIL
W-11 CITY OF GRIDLEY
3 IN. OR LARGER REDUCED
PRESSURE BACKFLOW
PREVENTER INSTALLATION
W-12 CITY OF GRIDLEY
2" BLOW OFF DEAD-END
WATER MAIN
W-13 CITY OF GRIDLEY
CONSTRUCTION WATER
DETAIL
W-14 CITY OF GRIDLEY
WATER MAIN TRENCH AND
BACKFILL
W-15 CITY OF GRIDLEY
TRENCH AND BACKFILL FOR
WATER SERVICE LINES
W-16 CITY OF GRIDLEY