Agenda Packet — Salinas City Council, March 11, 2025 (part 1 of 11)

Tuesday, March 11, 2025
4:00 PM
City of Salinas
200 Lincoln Ave., Salinas, CA 93901
www.cityofsalinas.org

SALINAS ROTUNDA
City Council
Mayor Dennis Donohue
Councilmembers:

Jose Luis Barajas, District 1 - Tony Barrera, District 2 Margaret D'Arrigo, District 3 - Gloria De La Rosa, District 4 Andrew Sandoval, District 5 - Aurelio Salazar, District 6 Rene Mendez, City Manager
Christopher A. Callihan, City Attorney
City Clerk’s Office: (831) 758-7381
Meeting Agenda - Final

March 11, 2025City Council Meeting Agenda - Final

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PLEDGE OF ALLEGIANCE

ROLL CALL

NEW EMPLOYEE WELCOME AND INTRODUCTIONS

PROCLAMATION
American Red Cross Month, March 2025

CITY OF CHAMPIONS / COMMENDATIONS
Paula Gail Johnson, Former Airport Commissioner

PUBLIC COMMENT PROCEDURES
If you wish to make a general public comment or comment on a specific agenda item, you are encouraged to attend the City Council meeting in person. Public comment may also be submitted via email at [email protected] and will be entered into the record. Public comments generally are limited to two minutes per speaker; the Mayor may further limit the time for public comments depending on the agenda schedule.

GENERAL PUBLIC COMMENTS
Receive public communications on items that are not on the agenda and that are in the City of Salinas’ subject matter jurisdiction. Comments on Consideration, Public Hearing items, and the Consent Agenda should be held until the items are reached.

CALIFORNIA GOVERNMENT CODE §84308 - LEVINE ACT
Government Code § 84308. Parties to any proceeding involving a license, permit or other

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March 11, 2025City Council Meeting Agenda - Final
entitlement for use pending before the City Council must disclose any campaign contributions over $500 (aggregated) within the preceding 12 months made by the party, their agent, and those required to be aggregated with their contributions under Government Code § 82015.5. The disclosure must include the amount contributed and the name(s) of the contributor(s).

CONSENT AGENDA
Matters listed under the Consent Agenda may be enacted by one motion unless a member of the Council requests a separate vote or discuss. Members of the public may comment on the Consent Agenda items collectively during their public comment.

ID#25-056
Minutes
Recommendation: Approve minutes of February 25, 2025.

ID#25-058 Financial Claims
Recommendation: Approve financial claims report.

ID#25-006 CalRecycle Rubberized Pavement Grant Acceptance Recommendation: Approve a Resolution authorizing the acceptance of CalRecycle funds in the amount of $250,000; the adoption of the 2024-25 Appropriation and Funding Sources in the Capital Improvement Program; increase the estimated revenue from State Government appropriation by $250,000; and increase funding for CIP 9981 Pavement Maintenance.

ID#25-046
City Council District 5 Recreation Center
Recommendation: Approve a Resolution appropriating $8.1 Million Dollars from the District 5 Recreation Center Reserve fund to CIP 9342 - District 5 Recreation Center.

ID#25-044
Las Casitas Drive Neighborhood Traffic Calming Plan
Recommendation: Approve a Resolution approving the Las Casitas Drive Neighborhood Traffic Calming Plan supported by residents for implementation.

CONSIDERATION
ID#25-052
Sanitary Sewer Rate Study
Recommendation: Receive the findings of the Sanitary Sewer Rate Analysis and recommend a rate scenario for a potential increase of the sanitary sewer rate.

ID#25-045
Adoption of the Stormwater Master Plan (SWMP) Update
Recommendation: Approve a Resolution adopting the Salinas Stormwater Master Plan Update and related Appendices.

COUNCILMEMBERS’ REPORTS, APPOINTMENTS AND FUTURE AGENDA ITEMS Receive communication from Councilmembers on reports, appointments and future agenda items. Councilmember comments are generally limited to three minutes.

ADJOURNMENT

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March 11, 2025City Council Meeting Agenda - Final
_____________________________
Patricia M. Barajas, City Clerk

AGENDA MATERIAL / ADDENDUM
Any addendums will be posted within 72 hours of regular meetings or 24 hours of special meetings and in accordance with Californian Government Code Section 54954.2 and 54956. City Council agenda reports and other writings distributed to the legislative body may be viewed at the Salinas City Clerk’s Office, 200 Lincoln Avenue, Salinas, and are posted on the City’s website at www.cityofsalinas.org in accordance with California Government Code section 54597.5. The City Council may take action that is different than the proposed action reflected on the agenda.

Disability-related modification or accommodation, including auxiliary aids or services, may be requested by any person with a disability who requires a modification or accommodation in order to participate in the meeting. Language interpretation may be requested as soon as possible but by no later than 5 p.m. of the last business day prior to the meeting. Requests should be referred to the City Clerk’s Office At 200 Lincoln Avenue, Salinas, 758-7381, as soon as possible but by no later than 5 p.m. of the last business day prior to the meeting. Hearing impaired or TTY/TDD text telephone users may contact the city by dialing 711 for the California Relay Service (CRS) or by telephoning any other service providers’ CRS telephone number.

PUBLIC NOTIFICATION
This agenda was posted on March 6, 2025 in the Salinas Rotunda and City's website.

Meetings are streamed live at https://salinas.legistar.com/Calendar.aspx, televised live on Comcast Channel 25 and on http://www.youtube.com/thesalinaschannel at 4:00 p.m. on the date of the regularly scheduled meeting and will be broadcast throughout the day on Friday, Saturday, Monday and Wednesday following the meeting. For the most up-to-date Broadcast Schedule for The Salinas Channel on Comcast 25, please visit or subscribe to our Google Calendar located at http://tinyurl.com/SalinasChannel25. All past City Council meetings may also be viewed on the Salinas Channel on YouTube at http://www.youtube.com/thesalinaschannel.

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City of Salinas
Legislation Text
200 Lincoln Ave., Salinas,
CA 93901
www.cityofsalinas.org
File #: ID#25-056, Version: 1
Minutes
Approve minutes of February 25, 2025.

City of Salinas Printed on 3/6/2025Page 1 of 1
powered by Legistar™
City of Salinas
Legislation Text
200 Lincoln Ave., Salinas,
CA 93901
www.cityofsalinas.org
File #: ID#25-058, Version: 1
Financial Claims
Approve financial claims report.

City of Salinas Printed on 3/6/2025Page 1 of 1
powered by Legistar™
Number Date Status Payee Name
Transaction
Amount
482420 02/27/2025 Open Alberto Duran $186.50
482421 02/27/2025 Open Anthony Avila $280.75
482422 02/27/2025 Open Blake Ziebell $450.00
482423 02/27/2025 Open Carlos Acosta $128.50
482424 02/27/2025 Open Christopher Knapp $257.25
482425 02/27/2025 Open Gabriel Gonzalez $280.75
482426 02/27/2025 Open Gabriela Contreras $280.75
482427 02/27/2025 Open Guadalupe Rodriguez $280.75
482428 02/27/2025 Open Julian Gamez Gonzalez $309.25
482429 02/27/2025 Open Martina Byler $252.00
482430 02/27/2025 Open Nicolas Reyes $340.00
482431 02/27/2025 Open Patricia Penaloza $199.00
482432 02/27/2025 Open Rene Mendez $302.22
482433 02/27/2025 Open Ruby Alvarez $280.75
482434 02/27/2025 Open Seth Morten $261.50
482435 02/27/2025 Open Victor Cortina $178.00
482436 02/27/2025 Open Yolanda Rocha $280.75
482437 02/27/2025 Open 4Leaf Inc $20,057.44
482438 02/27/2025 Open 72 Hour LLC dba Chevrolet of Watsonville/National $57,832.27 482439 02/27/2025 Open AARDVARK $95,516.00
482440 02/27/2025 Open ADB Safegate Americas Holding Inc dba ADB Safegate $3,049.87 482441 02/27/2025 Open Alco Water $9,745.30
482442 02/27/2025 Open Alison Heller-Ono dba Worksite International $775.00 482443 02/27/2025 Open All Pets Hospital $1,705.83
482444 02/27/2025 Open Amazon.Com $1,111.07
482445 02/27/2025 Open American Supply Company $1,443.91 482446 02/27/2025 Open American Textile and Supply Inc $613.39 482447 02/27/2025 Open Anderson Brule Architects, Inc. $6,469.65 482448 02/27/2025 Open Arrowhead Forensics $352.27
482449 02/27/2025 Open AT&T Mobility $225.00
482450 02/27/2025 Open AutoZone West Inc $137.30
482451 02/27/2025 Open Azteca Systems Holdings, LLC dba Azteca Systems LL $56,100.00 482452 02/27/2025 Open B & H Foto & Electronics Corp $3,020.22 482453 02/27/2025 Open Badge Frame, Inc $43.00
482454 02/27/2025 Open Bear Electrical Solutions Inc $45,388.25 482455 02/27/2025 Open BFS Landscape Architects $950.00 482456 02/27/2025 Open Brodart Company $168.54
482457 02/27/2025 Open Cadence Team, Inc $91,233.57
482458 02/27/2025 Open California Water Service $83.62
482459 02/27/2025 Open California Water Service $267.60 482460 02/27/2025 Open Carl Warren & Company, LLC $11,982.49 General Account - General Account
Check
City of Salinas
Payment Register
From Payment Date: 2/21/2025 - To Payment Date: 3/6/2025 user: Josephine Fernandez Pages: 1 of 5 Thursday, March 6, 2025 Number Date Status Payee Name
Transaction
Amount
General Account - General Account
Check
City of Salinas
Payment Register
From Payment Date: 2/21/2025 - To Payment Date: 3/6/2025 482461 02/27/2025 Open Carollo Engineers, Inc $23,119.63 482462 02/27/2025 Open Catalis Public Works & Citizen Engagement, LLC $2,000.00 482463 02/27/2025 Open CDW Government LLC $862.06
482464 02/27/2025 Open Cintas $377.35
482465 02/27/2025 Open Coalition of Homeless Services Providers $4,891.46 482466 02/27/2025 Open Coast Automotive Warehouse Inc $293.53 482467 02/27/2025 Open Coast Counties Truck & Equipment Co dba Coast Coun $54.63 482468 02/27/2025 Open Comcast $4,162.12
482469 02/27/2025 Open Comcast (Business) $638.66
482470 02/27/2025 Open Community Human Services $220,487.19 482471 02/27/2025 Open Craftwater Engineering, Inc $26,614.00 482472 02/27/2025 Open CSC Of Salinas $211.53
482473 02/27/2025 Open CSG Consultants $3,534.00
482474 02/27/2025 Open Devin Kile $59.78
482475 02/27/2025 Open Downtown Streets, Inc $14,229.28 482476 02/27/2025 Open East Bay Tire Company $7,514.21
482477 02/27/2025 Open Eden Council for Hope and Opportunity $6,577.76 482478 02/27/2025 Open Engie Services U.S. Inc. $4,519.51 482479 02/27/2025 Open Enterprise Holdings, Inc dba EAN Services LLC $181.50 482480 02/27/2025 Open Evident $510.71
482481 02/27/2025 Open Fastaire Hand Dryers Inc. $1,846.77 482482 02/27/2025 Open Fed Ex $120.48
482483 02/27/2025 Open First Alarm Security & Patrol Inc dba An Allied Un $3,875.84 482484 02/27/2025 Open Genuine Parts Company dba NAPA Auto Parts $1,692.71 482485 02/27/2025 Open Gold Star Motors dba Gold Star Buick GMC $1,076.87 482486 02/27/2025 Open Granite Construction Company $741,014.73 482487 02/27/2025 Open Great West Equipment $5,805.80
482488 02/27/2025 Open Greens Camera Shop $16.32
482489 02/27/2025 Open Greenwood Chevrolet dba Hollister Powersports $1,377.76 482490 02/27/2025 Open Harris and Associates $8,352.25
482491 02/27/2025 Open HD Supply White Cap Construction Supply $79.73 482492 02/27/2025 Open Herc Rentals Inc. $360.53
482493 02/27/2025 Open Homer T Hayward Lumber Co dba Hayward Lumber $1,774.36 482494 02/27/2025 Open Hope Services $3,735.00
482495 02/27/2025 Open Interstate Battery System Inc $527.81 482496 02/27/2025 Open Jose Luis Corral dba Salinas Pizza $1,879.16 482497 02/27/2025 Open JS Inc dba Steinbeck Lodge $114,720.80 482498 02/27/2025 Open Kimball Midwest $3,137.87
482499 02/27/2025 Open Kimley Horn And Assoc Inc $105,225.88 482500 02/27/2025 Open Larry S Kent Inc dba Kent Construction $223,358.23 482501 02/27/2025 Open Laser Technology Inc. $3,135.48
user: Josephine Fernandez Pages: 2 of 5 Thursday, March 6, 2025 Number Date Status Payee Name
Transaction
Amount
General Account - General Account
Check
City of Salinas
Payment Register
From Payment Date: 2/21/2025 - To Payment Date: 3/6/2025 482502 02/27/2025 Open Law Enforcement Psychological Services $1,425.00 482503 02/27/2025 Open Leadership Monterey County $2,500.00 482504 02/27/2025 Open Leon De Asis $2,000.00
482505 02/27/2025 Open Maze & Associates $25,130.00
482506 02/27/2025 Open Mid-Peninsula New Communities, Inc $547.80 482507 02/27/2025 Open Monterey Bay Analytical Services, Inc $1,010.00 482508 02/27/2025 Open Monterey County Emergency Communications Dept $940,140.00 482509 02/27/2025 Open Monterey County Sheriffs Office $128,276.73 482510 02/27/2025 Open Monterey County The Herald $978.51 482511 02/27/2025 Open Motorola Solutions, Inc $77,810.65 482512 02/27/2025 Open Municipal Maintenance Equipment dba MME $1,079.23 482513 02/27/2025 Open Natividad Medical Foundation $9,650.30 482514 02/27/2025 Open O'Reilly Auto Parts $190.61
482515 02/27/2025 Open Office Depot Business Service Division $2,202.44 482516 02/27/2025 Open Opendatasoft LLC $24,000.00
482517 02/27/2025 Open Pacific Gas and Electric Company $656.23 482518 02/27/2025 Open Pacific Gas and Electric Company $19,486.05 482519 02/27/2025 Open Pacific Gas and Electric Company $128.77 482520 02/27/2025 Open Pacific Gas and Electric Company $122.52 482521 02/27/2025 Open Pacific Gas and Electric Company $764.80 482522 02/27/2025 Open Pacific Gas and Electric Company $752.00 482523 02/27/2025 Open Pacific Gas and Electric Company $135.23 482524 02/27/2025 Open Pacific Gas and Electric Company $78.05 482525 02/27/2025 Open Pacific Gas and Electric Company $108.22 482526 02/27/2025 Open Pacific Truck Parts Inc $419.54
482527 02/27/2025 Open Peninsula Messenger, LLC $450.00 482528 02/27/2025 Open Petsmart $994.07
482529 02/27/2025 Open Place Works Inc $30,899.66
482530 02/27/2025 Open Premier Builders, Inc. $491,723.93 482531 02/27/2025 Open Protel Communications, Inc dba Protelesis Corporat $153.35 482532 02/27/2025 Open Pure Water $12.25
482533 02/27/2025 Open Qless, Inc. $2,638.00
482534 02/27/2025 Open RDO Equipment Company $1,522.75
482535 02/27/2025 Open Republic Services of Salinas $656.49 482536 02/27/2025 Open Rexel USA, Inc dba Platt Electric Supply $1,342.33 482537 02/27/2025 Open Ronnie G. Rehn dba Smokey Key Service $131.10 482538 02/27/2025 Open Ruth Maria Milla-Leon dba Andersen's Lock & Safe $27.42 482539 02/27/2025 Open Same Day Shred $60.00
482540 02/27/2025 Open San Lorenzo Lumber $1,328.46
482541 02/27/2025 Open Shums Coda Associates, Inc $3,188.10 482542 02/27/2025 Open Sirchie Finger Print Laboratories $439.22 user: Josephine Fernandez Pages: 3 of 5 Thursday, March 6, 2025 Number Date Status Payee Name
Transaction
Amount
General Account - General Account
Check
City of Salinas
Payment Register
From Payment Date: 2/21/2025 - To Payment Date: 3/6/2025 482543 02/27/2025 Open Smart and Final Iris $632.34
482544 02/27/2025 Open Smith and Enright Landscaping $4,370.00 482545 02/27/2025 Open Snap-On Tools Corporation $351.58 482546 02/27/2025 Open Springshare LLC $4,497.00
482547 02/27/2025 Open Star Sanitation Services $163.24 482548 02/27/2025 Open Stephanie Morales-Bravo Petty Cash Custodian $40.00 482549 02/27/2025 Open Sturdy Oil Company $231.46
482550 02/27/2025 Open Target Pest Control $205.00
482551 02/27/2025 Open The Bank Of New York Mellon $3,500.00 482552 02/27/2025 Open Todd Hearnsberger dba TH Electric $834.95 482553 02/27/2025 Open Towne & Country Painting Inc. dba A & A Painting $3,400.00 482554 02/27/2025 Open True North Compliance Services, Inc $7,314.93 482555 02/27/2025 Open U.S. Bank National Association ND $12,824.54 482556 02/27/2025 Open Uline, Inc $530.18
482557 02/27/2025 Open United Parcel Service $36.00
482558 02/27/2025 Open Valley Fabrication Inc $1,263.13 482559 02/27/2025 Open Valley Health Associates $5,852.58 482560 02/27/2025 Open Vegetable Growers Supply Company $196.63 482561 02/27/2025 Open Verizon Wireless $536.39
482562 02/27/2025 Open Verizon Wireless $588.30
482563 02/27/2025 Open Verizon Wireless $561.06
482564 02/27/2025 Open Voyager $340.35
482565 02/27/2025 Open W W Grainger Inc $57.72
482566 02/27/2025 Open Wald, Ruhnke & Dost Architects, LLP $2,800.00 482567 02/27/2025 Open Walmart c/o Capitol One $278.36 482568 02/27/2025 Open Water One Industries, Inc $21,733.91 482569 02/27/2025 Open WCAF, LLC dba Watsonville Ford $1,285.14 482570 02/27/2025 Open WCDJR LLC dba Watsonville Chrysler Dodge Jeep Ram $1,786.90 482571 02/27/2025 Open Worldpac $903.77
482572 02/27/2025 Open Elvia Hilts $12.50
482573 02/27/2025 Open Miguel Jimenez $19.11
482574 02/27/2025 Open NCA Dance Studio $131.00
482575 02/27/2025 Open The Uni-Kool Partners $2,641.65
482576 03/06/2025 Open Adolfo Lopez $350.00
482577 03/06/2025 Open Alejandro Magana $189.25
482578 03/06/2025 Open Alexis Mejia $513.32
482579 03/06/2025 Open Anthony Avila $263.50
482580 03/06/2025 Open Arjie Fernandez Laranjo $130.13
482581 03/06/2025 Open Bianca Navarro-Raya $102.25
482582 03/06/2025 Open Chayene Garcia $280.75
482583 03/06/2025 Open Cindy Guerrero $19.50
user: Josephine Fernandez Pages: 4 of 5 Thursday, March 6, 2025 Number Date Status Payee Name
Transaction
Amount
General Account - General Account
Check
City of Salinas
Payment Register
From Payment Date: 2/21/2025 - To Payment Date: 3/6/2025 482584 03/06/2025 Open Daniel M Soza $162.25
482585 03/06/2025 Open Darlenne Topacio Birrueta $23.20 482586 03/06/2025 Open Dave R Ball dba Motor Squad Training Institute $4,250.00 482587 03/06/2025 Open David Vigil Martinez $106.66
482588 03/06/2025 Open Devon McCauley $107.28
482589 03/06/2025 Open Edgar Garcia $136.00
482590 03/06/2025 Open Isaiah Rodriguez $280.25
482591 03/06/2025 Open John Richardson $76.50
482592 03/06/2025 Open Jose Fletes $470.00
482593 03/06/2025 Open Justin Heckman $232.75
482594 03/06/2025 Open Kim Picaso $102.25
482595 03/06/2025 Open Marco Sotelo Saldana $417.05
482596 03/06/2025 Open MCCLEOA $200.00
482597 03/06/2025 Open Oscar Solis $189.25
482598 03/06/2025 Open Robert Balaoro $263.50
482599 03/06/2025 Open Ruben Sanchez $145.75
482600 03/06/2025 Open Scott Calender $136.00
$3,821,000.52
General Account - General Account Totals
Type Check Totals:
user: Josephine Fernandez Pages: 5 of 5 Thursday, March 6, 2025 City of Salinas
Legislation Text
200 Lincoln Ave., Salinas,
CA 93901
www.cityofsalinas.org
File #: ID#25-006, Version: 1
CalRecycle Rubberized Pavement Grant Acceptance
Approve a Resolution authorizing the acceptance of CalRecycle funds in the amount of $250,000; the adoption of the 2024-25 Appropriation and Funding Sources in the Capital Improvement Program; increase the estimated revenue from State Government appropriation by $250,000; and increase funding for CIP 9981 Pavement Maintenance.

City of Salinas Printed on 3/6/2025Page 1 of 1
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CITY OF SALINAS

COUNCIL STAFF REPORT

DATE: MARCH 11, 2025
DEPARTMENT: PUBLIC WORKS DEPARTMENT
FROM: DAVID JACOBS, P.E, P.L.S, PUBLIC WORKS DIRECTOR THROUGH: ADRIANA ROBLES, P.E, CFM, CITY ENGINEER
BY: VICTORIA GUTIERREZ, JUNIOR ENGINEER

TITLE: CALRECYCLE RUBBERIZE D PAVEMENT GRANT PRO GRAM

ACCEPTANCE

RECOMMENDED MOTION:

Staff recommends the City Council approve a Resolution authorizing:

1. The acceptance of CalRecycle funds in the amount of $250,000;

2. The adoption of the following 2024-25 Appropriation and Funding Sources in the Capital Improvement Program:
a. Increase the estimated revenue from State Government appropriation by $250,000; and
b. Increase funding for CIP 9981 Pavement Maintenance (CIP 5800.50.9981).

EXECUTIVE SUMMARY:

On December 11, 2024, the Department of Resources Recycling and Recovery (CalRecycle) awarded the City of Salinas with a Rubberized Pavement Grant in the amount of $250,000 . The grant funds will be used to provide financial assistance for the upcoming 2025 Pavement Improvement Project. City staff recommends acceptance of the CalRecycle funds in the amount of $250,000, increase the estimated revenue by $250,000, and increase funding for CIP 9981 (CIP 5800.50.9981).

BACKGROUND:

On December 13, 2022, City Council approved Resolution No. 22544 authorizing the submission of applications to the California Department of Resources Recycling and Recovery (CalRecycle) grants/payment programs and approved the City Manager or designee as the signature authority to execute all documents necessary to implement and secure funding.

CalRecycle administers various grants and payment programs in an effort to reduce, recycle, and reuse solid waste generated in the state. On September 12, 2024, City staff applied to CalRecycle’s Page | 2
Rubberized Pavement Grant Program. The program goal is to decrease the adverse environmental impacts created by unlawful disposal and stockpiling of waste rubber tires by reimbursing local agencies to incorporate rubberized asphalt concrete in paving projects.

Rubberized asphalt concrete is a proven road paving material that is created by blending ground rubber from tires with asphalt binder and other conventional aggregate materials. Rubberized asphalt concrete is a durable material that helps reduce vehicle roadway noise.

On December 11, 2024, CalRecycle approved funding for the City in the amount of $250,000. The grant funds will be used to provide financial assistance for the upcoming 2025 Pavement Improvement P roject which will include all the streets from year 1 of the 5 -year pavement preservation street list Resolution No. 23031.

City staff recommends approving a resolution to accept the CalRecycle funds in the amount of $250,000; Increase the estimated revenue from State Government appropriation by $250,000; and Increase funding for CIP 9981 Pavement Maintenance (CIP 5800.50.9981).

CEQA CONSIDERATION:

Not a Project . The City of Salinas has determined that the proposed action is not a project as defined by the California Environmental Quality Act (CEQA) (CEQA Guidelines Section 15378).

In addition, CEQA Guidelines Section 15061 includes the general rule that CEQA applies only to activities which have the potential for causing a significant effect on the environm ent. Where it can be seen with certainty that there is no possibility that the activity in question may have a significant effect on the environment, the activity is not subject to CEQA. Because the proposed action and this matter have no potential to cause any effect on the environment, or because it falls within a category of activities excluded as projects pursuant to CEQA Guidelines section 15378, this matter is not a project. Because the matter does not cause a direct or foreseeable indirect physical change on or in the environment, this matter is not a project. Any subsequent discretionary projects resulting from this action will be assessed for CEQA applicability.

CALIFORNIA GOVERNMENT CODE §84308 APPLIES:

No, Government Code §84308/Levine Act does not apply to this item.

STRATEGIC PLAN INITIATIVE:

This item relates to the Council’s Goal of Infrastructure and Environmental Sustainability by investing in the condition of local streets.

DEPARTMENTAL COORDINATION:

Public Works staff and the City Manager have worked together to receive this grant as the City Manager is the designee authorized to execute documents for this grant.

Page | 3
FISCAL AND SUSTAINABILITY IMPACT:

The proposed funding from the CalRecycle Rubberized Pavement Grant is $250,000 and will be utilized to fund operations as described in this report. No matching funds are required to receive these grant funds and there is no anticipated impact to the City’s General Fund budget.

CIP No.

Funding
Source
Appropriation

Appropriation
Name
Total
Appropriation
Amount for
recommendation
FY 24-25
CIP
Budget
Page
Last Budget
Action (Date,
Resolution)*
9981 Various Various Slurry Seal
Improvements
$7,335,342 $250,000 59 6/11/24,
22979
9981 5201 55.5322 Intergovernmental
Other State Grant
& Reimb
$0 $250,000 N/A N/A
* The FY 24-25 Adopted Budget was adopted on June 11, 2024.

ATTACHMENTS:

Resolution
Grant Agreement Cover Sheet

- 1 -
RESOLUTION NO. _______ (N.C.S.)

A RESOLUTION ACCEPTING FUNDS FROM THE CALRECYCLE RUBBERIZED

PAVEMENT GRANT PROGRAM

WHEREAS, on December 13, 2022, the City Council approved Resolution No. 22544 authorizing the submission of applications to CalRecycle for grants and payment programs; and

WHEREAS, CalRecycle administers various grants and payment programs in their efforts to reduce, recycle, and reuse solid waste generated in the state; and

WHEREAS, on September 12, 2024, City staff a pplied to CalRecycle’ s Rubberized Pavement Grant Program; and

WHEREAS, on December 11, 2024, CalRecycle approved funding for the City in the amount of $250,000.

NOW, THEREFORE, BE IT RESOLVED BY THE COUNCIL OF SALINAS that said funds from CalRecycle are accepted in the amount of $250,000; and

BE IT FURTHER RESOLVED that the adoption of the following 2024 -25 Appropriation and Funding Sources in the Capital Improvement Program:
a. Increase the estimated revenue from State Government appropriation by $250,000; and
b. Increase funding for CIP 9981 Pavement Maintenance (CIP 5800.50.9981).

PASSED AND APPROVED this 11th day of March 2025, by the following vote:

AYES:

NOES:

ABSENT:

APPROVED:

_________________________________
Dennis Donohue, Mayor

ATTEST:

_____________________________
Patricia M. Barajas, City Clerk

City of Salinas
Legislation Text
200 Lincoln Ave., Salinas,
CA 93901
www.cityofsalinas.org
File #: ID#25-046, Version: 1
City Council District 5 Recreation Center
Approve a Resolution appropriating $8.1 Million Dollars from the District 5 Recreation Center Reserve fund to CIP 9342 - District 5 Recreation Center.

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CITY OF SALINAS

CITY COUNCIL STAFF REPORT

DATE: MARCH 11, 2025
DEPARTMENT: LIBRARY & COMMUNITY SERVICES

FROM: KRISTAN LUNDQUIST, LCS DIRECTOR

TITLE: CITY COUNCIL DISTRICT 5 RECREATION CENTER

RECOMMENDED MOTION:

A motion to a pprove a Resolution appropriating $8.1 Million Dollars from the District 5 Recreation Center Reserve fund to CIP 9342 - District 5 Recreation Center.

EXECUTIVE SUMMARY:

On May 10. 2022, t he City Council approved an $8.1 million dollar reserve to build a recreation center in City Council District 5. These funds need to be appropriated to CIP 9342 in order for staff to initiate the feasibility and design portion of the project.

BACKGROUND:

In early 2022, the Library & Community Servi ces Department and the Fire Department began collaborating on a potential shared use of a site for a new fire station and recreation center in City Council District 5. In February of 2022, a request was submitted to Assemblymember Rivas’ office in the amount of $20 million for consideration of State funding for the fire station and park improvements portion of the project. This request was contingent upon the City funding the recreation center portion of the project, in the approximate amount of $8.1 million dollars. While the City ultimately did not receive funding from the State for the fire station and park improvements, on May 10, 2022, the City Council approved an $8.1 million dollar reserve from general funds to build a recreation center in City Council District 5.

The City currently has (7) recreation centers including:

Facility Address City Council District
Bread Box Rec Center 740 N. Sanborn Rd. District 1
Central Park 420 Central Ave. District 3
Closter Park 401 Towt St. District 2
El Dorado Park 1655 El Dorado Dr. District 6
Firehouse Rec Center 1330 E. Alisal St. District 2
Hebbron Family Center 683 Fremont St. District 4
Recreation Center 320 Lincoln Ave. District 3
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The only City Council District that does not have a recreation center located within its boundaries is District 5. Recreation centers provide critical prevention services including youth programs, senior programs, community spaces, opportunities for learn ing. These services contribute to the quality of life for Salinas residents and create a sense of place.

Following the determination that the State would not provide funding for the fire station and park improvements, staff conducted outreach to determine the best location for the proposed recreation center. Staff conducted an interactive survey which resulted in 130 responses primarily from the 93906 zip code. The survey respondents identified a number of locations for a possible recreation center including City-owned propert ies and non-City-owned propert ies. Of the City -owned properties, Northgate Neighborhood Park received the most votes. Staff also conducted 4 pop-up outreach activities with a total of 151 participants, again Northgate Neighborhood Park rose to the top. Staff evaluated all suggested locations and determined that there were 3 potential City-owned properties that would work including Northgate Neighborhood Park, Laurelwood Neighborhood Park and Laurel Neighborhood Park. These sites along with the data from the survey and pop-up activities were presented to residents at a community meeting on October 25, 2022. During this meeting, Northgate Neighborhood Park rose to the top as the most suitable location.

Staff is ready to move this project forward beginning with a feasibility study to analyze the potential construction of a recreation center in Northgate Neighborhood Park and is requesting to appropriate the reserve funds to CIP 9342. The feasibility study will include additional community outreach regarding program needs, park amenity upgrades, and a conceptual design for the future recreation center. It will also incorporate the universal playground and ADA site improvement project creating synergy and improved access and recreational opportunities for the community.

CEQA CONSIDERATION:

Not a Project . The City of Salinas has determined that the proposed action is not a project as defined by the California Environmental Quality Act (CEQA) (CEQA Guidelines Section 15378).

CALIFORNIA GOVERNMENT CODE §84308 APPLIES:

No.

STRATEGIC PLAN INITIATIVE:

This action supports the City Council Goals of:
 Infrastructure and Environmental Sustainability
 Public Safety
 Youth and Seniors

DEPARTMENTAL COORDINATION

Staff from the Library & Community Services and Finance have collaborated on the need for appropriating funds. Moving forward, coordination between Library & Community Services , Page | 3
Public Works and Community Development will be critical in order to bring the District 5 Community Center to fruition.

FISCAL AND SUSTAINABILITY IMPACT:

This action would appropriate the $8.1 Million Dollars from the District 5 Recreation Center Reserve to CIP 9342 so that the project c an move forward with a feasibility study. Additional operating cost are yet to be determined; these costs will be better understood at the completion of the design process when we have determined the facility size and scope and will be brought back to the City Council at a later date.

ATTACHMENTS:

Resolution
Aerial Photo of Northgate Park
Fund

Appropriation

Appropriation
Name
Total
Appropriation
Amount for
recommendation
FY 24-25
Operating
Budget
Page
Last Budget Action (Date,
Resolution)
1100

$6.9 Mil

District 5
Recreation
Center
Reserve
$6.9 Mil $6.98 Mil

May 10, 2022,
22352
1200 $1.2 Mil District 5
Recreation
Center
Reserve
$1.2Mil $1.2 Mil May 10, 2022,
22352
RESOLUTION NO. _____________________(N.C.S.)

A RESOLUTION AUTHORIZING THE ALLOCATION OF $8.1 MILLION DOLLARS FROM AVAILABLE FUND BALANCE TO CIP 9342 FOR A RECREATION CENTER IN CITY COUNCIL DISTRICT 5

WHEREAS, City Council District 5 has no recreation center in its boundaries; and

WHEREAS, on May 10, 2022, the City Council established an $8.1 million reserve to fund the construction of a recreation center in District 5; and

WHEREAS, the reserve funds need to be appropriated to CIP 9342 in order for staff to initiate a feasibility study and conceptual design process.

NOW THEREFORE, BE IT RESOLVED BY THE SALINAS CITY COUNCIL that the $8.1 million dollar reserve be appropriated to CIP 9342 to fund the construction of a recreation center in City Council District 5.

PASSED AND APPROVED this 18th day of March, 2025 by the following vote:

AYES:

NOES:

ABSENT:

APPROVED:

________________________________
Dennis Donohue, Mayor

ATTEST:

_________________________
Patricia M. Barajas, City Clerk

Northgate Park

City of Salinas
Legislation Text
200 Lincoln Ave., Salinas,
CA 93901
www.cityofsalinas.org
File #: ID#25-044, Version: 1
Las Casitas Drive Neighborhood Traffic Calming Plan
Approve a Resolution approving the Las Casitas Drive Neighborhood Traffic Calming Plan supported by residents for implementation.

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CITY OF SALINAS

COUNCIL STAFF REPORT

DATE: MARCH 11, 2025
DEPARTMENT: PUBLIC WORKS DEPARTMENT
FROM: DAVID JACOBS, PUBLIC WORKS DIRECTOR
BY: ADRIANA ROBLES, CITY ENGINEER

GERARDO RODRIGUEZ, ASSISTANT ENGINEER
TITLE: LAS CASITAS DRIVE NEIGHBORHOOD TRAFFIC

CALMING PLAN

RECOMMENDED MOTION:

A motion to approve a Resolution approving the Las Casitas Drive Neighborhood Traffic Calming Plan supported by residents for implementation.

EXECUTIVE SUMMARY:

At its August 20, 2024 , meeting, City Council approved the 2024 -2025 Prioritization of Traffic Calming Projects, which ranked Las Casitas Drive as the highest priority. Staff held a community meeting and worked with residents of Las Casitas Drive to develop a traffic calming plan. A vote was conducted to gauge community support, and the Las Casitas Drive Neighborhood Traffic Calming Plan met the support requirements as prescribed by the City’s Neighborhood Traffic Management Program (“Traffic Calming Policy”).

BACKGROUND:

In October 2009, the City Council adopted the Salinas Neighborhood Traffic Management Program to address residential neighborhood traffic concerns. The program was established to address traffic concerns from residential neighborhoods. Traffic calming devices are generally not considered traffic control devices as defined by the State and Federal Manual of Uniform Traffic Control Devices (MUTCD). The City began compiling traffic calming studies in 2002 and found there were very few applications in California. To assist in the development of the City’s policy, the City hired a consultant to develop the Neighborhood Traffic Management Program. The resulting Traffic Calming Policy contains a toolbox of traffic calming measures that can be used to address neighborhood problems associated with speed ing and vehicle volume on residential streets. The adoption of the policy also included the adoption of the traffic calming tools. The policy also provides the process for consideration of projects under the program which is important for securing the residents’ support.

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While developing the policy, City staff met with affected parties including emergency response providers, solid waste collection services and street sweeping. Therefore, implementation of the Traffic Calming Program includes considerations and understanding of the program by potentially affected parties.

On November 7, 2017, following an influx of traffic calming requests received, the City Council approved criteria for prioritizing traffic calming requests based on traffic conditions, collision history, nearby land uses, roadway geometrics and facilities. These criteria provide a more holistic way of analyzing and prioritizing requests given the City’s limited resources. In order to process requests based on the approved criteria , staff annually presents a recommended traffic calming priorities list to the Traffic and Transportation Com mission and City Council. City staff then proceeds with plan development, plan support and plan implementation based on Council approved priorities.

City staff has received comments and questions regarding the process of the Traffic Calming Policy from residents, Councilmembers, and Commissioners. There has been concerns of the length of the process from when a traffic calming petition gets submitted to when traffic calming devices get implemented, resources for the program, and the prioritization process. Staff has taken the comments and questions and will be working towards updating the Traffic Calming Policy.

City staff is aiming to begin the process by having a study session with the Traffic and Transportation Commission late Spring to early Summer.

In October 2023 , r esidents of Las Casitas Drive submitted a petition requesting the City to investigate speeding issues along Las Casitas Drive . Staff conducted t raffic studies at various locations along the street, compiled data, analyzed the street, and the results confirmed high speeds and volume, pedestrian/bicycle collisions, horizontal and vertical curvature on Las Casitas Drive.

Las Casitas Drive was ranked highest in the 2024 -2025 Traffic Calming Prioritization, approved by City Council.

The Traffic and Transportation Division held a community meeting on November 7 , 202 4, to develop a traffic calming plan with residents of Las Casitas Drive neighborhood to address the speeding concerns. With residents’ input received at th e meeting, a neighborhood traffic calming plan was developed. The plan includes three (3) speed cushion on Las Casitas Drive. Attachment 1 provides the approximate locations of the speed cushions.

In accordance with the City’s policy, the plan was taken to vote to determi ne support from residents. The vote was conducted over a 6-week period. On January 2, 2025, the voting period ended, and the neighborhood met the support vote require d. The City received ballots from 52% of all households, meeting the 50% return rate requirement. Of the ballots received, 100% were in favor of the Plan , meeting the 67% in favor requirement. S taff is therefore recommending the implementation of the Las Casitas Drive Neighborhood Traffic Calming Plan.

Traffic and Transportation Commission

The Las Casitas Drive Neighborhood Traffic Calming Plan was presented to the Traffic and Transportation Commission at its February 13, 202 5, meeting. The Commission voted Page | 3
unanimously (5-0) recommending City Council approve a Resolution to implement the Las Casitas Drive Neighborhood Traffic Calming Plan supported by residents.

CEQA CONSIDERATION:

Staff has determined that the project is exempt from the California Environmental Quality Act (CEQA) Guidelines (Section 15301, Class 1). The project consists of the operation, repair, or minor alteration of public streets involving no expansion of use. There would be no significant effect on the environment.

STRATEGIC PLAN INITIATIVE:

The Traffic Calming Policy support Council’s goal of “Public Safety”.

DEPARTMENTAL COORDINATION:

Public Works staff coordinate with the Salinas Fire Department on the recommendation of the traffic calming plan. Staff also coordinates with the Salinas Police Department if traffic calming enforcement assistance is necessary.

FISCAL AND SUSTAINABILITY IMPACT:

The estimated total cost of these improvements is $32,300. There are sufficient funds available in the Traffic Calming Program budget (CIP 9163) to complete this work.

Fund

Appropriation

Appropriation
Name
Total
Appropriation
Amount for
recommendation
FY 24-25 CIP
Budget Page
Last Budget
Action (Date,
Resolution)
5800 50.9163-

66.4000
Capital Outlay
Improvements
$ 200,000 N/A Engineering &
Transportation
6/11/2024

ATTACHMENTS:

Resolution
Attachment 1: Las Casitas Drive Proposed Traffic Calming Plan

RESOLUTION NO. _______ (N.C.S.)

A RESOLUTION OF THE SALINAS CITY COUNCIL APPROVING THE

IMPLEMENTATION OF THE LAS CASITAS DRIVE NEIGHBORHOOD TRAFFIC

CALMING PLAN AS SUPPORTED BY RESIDENTS

WHEREAS, the City Council adopted the City’s Traffic Calming Policy at its October 6, 2009 meeting (Resolution No. 19764) which outlined a process for consideration of traffic calming requests from the community; and
WHEREAS, the City Council adopted a resolution approving the prioritization strategy for Traffic Calming requests on its November 7, 2017 , meeting (Resolution No. 21291) with the support of the Traffic and Transportation Commission; and WHEREAS, at its August 20, 2024 , meeting, City Council approved the 202 4-2025 Prioritization of Traffic Calming Projects (Resolution No. 2 3065), whereas Las Casitas Drive ranked the highest priority; and
WHEREAS, staff worked with residents of Las Casitas Drive to develop a traffic calming plan, and distribute ballots to help determine neighborhood support of the plan. As required by the City’s policy, a vote was conducted to gauge community support, and the Las Casitas Drive traffic calming plan received the support votes required as prescribed by the City’s policy; and WHEREAS, the Traffic and Transportation Commission at its February 13, 2025 meeting voted (5-0) to recommend approval of the implementation of the Las Casitas Drive Neighborhood Traffic Calming Plan supported by residents; and
WHEREAS, the City of Salinas has determined that the implementing the traffic calming plan is exempt from the California Environmental Quality Act (CEQA) Guidelines (Section 15301, Class 1). The project consists of the operation, repair, or minor alteration of public streets involving no expansion of use. There would be no significant effect on the environment NOW THEREFORE, BE IT RESOLVED that the Salinas City Council approves the Las Casitas Neighborhood Traffic Calming Plan for implementation utilizing CIP 9163 – Traffic Calming Improvements for expenditures.

PASSED AND APPROVED this 11th day of March 2025, by the following vote:

AYES:

NOES:

ABSENT:

APPROVED:

__________________________________
Dennis Donohue, Mayor
ATTEST:

__________________________
Patricia M. Barajas, City Clerk

S A L I N A
S
C
A

L I F O R N I A
N

LAS CASITAS DR

DETAIL A
stop
stop
stop
stop
stop
stop
stop

RANCHERO DR

PINO WAY

NOGAL DR

CAOBA WAY

RIDER AVE

ALAMO WAY

DETAIL A -
LEGEND

SPEED CUSHION
EXISTING STOP SIGNstop

PROPOSED LAS CASITAS DR

TRAFFIC CALMING PLAN
PLAN DE PROPUESTO DE MODERACIÓN DE

TRAFICO EN LA CALLE LAS CASITAS DR

TYPICAL INSTALLATION
00150'300'
SCALE: 1"=150'
City of Salinas
Legislation Text
200 Lincoln Ave., Salinas,
CA 93901
www.cityofsalinas.org
File #: ID#25-052, Version: 1
Sanitary Sewer Rate Study
Receive the findings of the Sanitary Sewer Rate Analysis and recommend a rate scenario for a potential increase of the sanitary sewer rate.

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CITY OF SALINAS

CITY COUNCIL STAFF REPORT

DATE: MARCH 11, 2025
DEPARTMENT: PUBLIC WORKS DEPARTMENT
FROM: DAVID JACOBS, PUBLIC WORKS DIRECTOR
BY: ADRIANA ROBLES, CITY ENGINEER

SELINA ANDREWS, FINANCE DIRECTOR
TITLE: SANITARY SEWER RATE STUDY

RECOMMENDED MOTION:

Receive the findings of the Sanitary Sewer Rate Analysis and recommend a rate scenario for a potential increase of the sanitary sewer rate.

EXECUTIVE SUMMARY:

Wallace Group was retained by the City of Salinas to develop a sanitary sewer rate study (“Study”) for the wastewater enterprise program. A draft Study is currently under review by City staff. The purpose of the Study is to develop a ten-year financial plan to help ensure that the wastewater enterprise fund will meet financial obligations for ongoing operation s and maintenance, debt service, and capital improvements while maintaining prudent financial reserves. The financial plan provides an opportunity to assess the potential implications of future operating and maintenance costs, capital improvement program needs, current and future debt obligations, changing customer demands, and future development. Salinas’ wastewater program is a self-supporting enterprise of the City that includes the sanitary sewer system, staff, equipment, and supplies. That is, the utility service is expected to generate the revenues (through rate payer fees) to cover the ongoing costs of operations, mainten ance, administration, regulatory compliance, debt service, capital improvements and maintenance of prudent financial reserves.

Two scenarios have been developed that would address the financial obligations of the wastewater enterprise program. The full report describes in detail the assumptions, procedures, and results of the Study, including conclusions and staff and Finance Committee recommendations.

BACKGROUND:

The Sanitary Sewer System
The City of Salinas owns and operates a municipal sanitary sewer system (“sewer system”) that services residents and businesses within its service area. The sanitary sewer system has a service area of approximately 12,430 acres, with over 2 80 miles of gravity sewer mains and eleven (11) Page | 2
lift stations1 that convey sewage flows to the Regional Wastewater Treatment Plant, operated by Monterey One Water (M1W). M1W collects fees for the treatment of the sanitary sewage. M1W fees are adjusted annually. M1W fees are separate from the rate fees collected for the City through M1W. M1W currently collects $50.95 for their wastewater treatment and $5.45 for the City of Salinas’ sanitary sewer rate.

In 2011, a Sanitary Sewer Master Plan was developed and the following year, a rate study was prepared that increased sewer rates to $5.45 per month for residential users or equivalent dwelling unit (EDU). Sewer rates are used by the City of Salinas to provide the service required to maintain the City’s sanitary sewer system (pipes, manholes, lift stations, and equipment). Sewer rates fund the entirety of the wastewater enterprise fund. The wastewater enterprise fund pays for the sanitary sewer system, staff, supplies, electricity, and everything needed to keep the sanitary sewer system within the City of Salinas operational. The City’s sanitary sewer rate has not changed since 2012.

Over several years, the wastewater enterprise fund has had a funding shortfall. This has meant that necessary infrastructure repairs and upgrades have not been financially possible, leading to system failures and costly emergency repairs. Investment is required to meet regulatory mandates and to prevent additional untreated sewage discharges.

In February 2021, staff retained Wallace Group to update the Sanitary Sewer Master Plan (Resolution No. 22051). The Sanitary Sewer Master Plan Update (SSMP) included document review, data collection, field surveys, comprehensive lift station assessment, in -line sewer flow monitoring, wastewater flow projections, development, and calibration of a hydraulic sewer model to identify collection system deficiencies for existing , and future build -out conditions and development of a Sanitary Sewer Capital Improvement Program.

On May 2, 2023, through Resolution No. 22648, City Council adopted the Salinas Sanitary Sewer Master Plan Update . The SSMP identified existing hydraulic deficiencies, operation and maintenance repairs, and lift station upgrades required to keep the existing sanitary sewer system operational. The SSMP estimates sewage flows at 10.46 million gallons per day from the existing sanitary sewer system . Required maintenance repairs and existing hydraulic deficiencies were ranked based on priority . (See CIP ranking tables of the SSMP (Attachment 1) ). Costs for maintenance repairs and fixing existing hydraulic deficiencies are the sole responsibility of City rate payers.

The SSMP estimates an additional 2.33 million gallons per day of sewage flows from the North of Boronda Future Growth Area (FGA) will be added to the existing system at build-out conditions.

This will require upsizing the existing system to meet the additional demand. Costs to upsize the sewer system are the developers’ responsibility. Several sanitary sewer mains require both repairs and upsizing to meet the anticipated future conditions. In these cases, the cost responsibilities are shared between the City and the developers at varying percentages depending on the condition of the sewer system. (See Cost Sharing tables (Attachment 2)).

On September 24, 2024, City Council approved an amendment to the sanitary sewer impact fee (Resolution No. 23100) . Impact fees are fees paid by developers to offset the impacts from development to the existing system . A nexus study prepared by Wallace’s consultant, DTA,

1 Lift Station. In sanitary sewer systems, lift stations pump sewage from lower elevations to higher elevations.

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provided the justification for the adjustment to the impact fee to ensure that developers were covering the full cost of their fair share responsibilities to upsize sanitary sewer mains as identified in SSMP.

The SSMP developed a Sanitary Sewer Capital Improvement Program that iden tified capital improvement projects (CIP) to address both the existing maintenance repairs and deficiencies and upsizing for anticipated future conditions . Those projects were ranked based on priority. The criteria used for ranking and prioritizing existing system CIPs included impacts to water bodies, design standards , maintenance requirements, impact to the communit y, and proximity to monitoring manholes. For lift station CIPs, the criteria used to prioritize them included assessment of impacts to water bodies, inspection frequency, pumping capacity deficiency, peak hour emergency response time, bypass requirement, generator requirement, control or electronic update requirement, and impacts to the community. Possible impacts from future development were also analyzed for m aintenance and lift station CIP s. Future CIPs required exclusively to upsize the sewer system to accommodate future development were not ranked in the SSMP as these improvements must be coordinated and timed with development.

On August 6, 2024, City Council a pproved a Tentative Map for a portion of the Central Area Specific Plan (CASP), comprised of 427 single family and multi -family residential lots and 10 park, open space, and public/semipublic lots on 189.27 acres (Resolution No. 23058). CASP is part of the FGA. Other developments within the FGA are currently in pre -application or early concept stages of development. (See Future Growth Area – North of Boronda (Attachment 3)).

With the FGA developments moving forward and necessary sewer system improvements and upsizing required, a tentative schedule was developed for the CIPs. The tentative CIPs schedule for maintenance, lift stations and future CIPs was used to guide the projected need for funding for the CIPs in the Sanitary Sewer Rate Study, see CIP schedules (Attachment 4).

On April 23, 2024, an amendment to Wallace Group’s contract was approved by City Council (Resolution No. 22947) allowing for the commencement of a sewer rate analysis. Wallace Group, partnered with DTA to evaluate potential rate structures and provide recommendations on how to address funding gaps for sanitary sewer system repairs, upgrades and future needs . (See DTA memorandum (Attachment 5)).

Sanitary Sewer Rate Study
In November 2011, Salinas City Council received a Wastewater Financial Plan and Rate Study.

At the time the sanitary sewer rates were $4.46 per month for residential users and Monterey Regional Water Pollution Control Agency (now Monterey One Water (M1W)) rates were $12.75 per month for residential users. M1W adjusts their rates annually and currently charge $50.95 per month per EDU. The City’s 2011 sanitary sewer rate study recommended an increase from $4.46 per month to $5.45 per month per EDU for Salinas rate payers for the City’s sanitary sewer rates, effective February 1, 2012. Although the City Council adopted the General Plan in 2002, the 2011 rate study did not incorporate CIPs to address upsizing for future conditions. Since 2011, the City of Salinas has seen a population increase of 3.8% and a 41.2% cumulative inflation rate increase.

The City’s current sanitary sewer rate of $5.45 per residential user or equivalent dwelling unit (EDU) is intended to cover the City’s annual operation and maintenance (O&M) costs, as well as Page | 4
servicing existing debt obligations , but it does not. The City’s sanitary sewer enterprise fund ’s expected revenue and annual budget is projected to experience a shortfall of approximately $400,000 for FY 2024-25 and will not meet the required 125% debt service coverage requirement on the existing bonds . In addition, the current budget does not include capital improvements required for system replacements and upgrades. For reference, the existing rate of $5.45 per EDU would need to be increased to $9.54 to meet the 125% debt service coverage requirement on the existing bonds as well as to fund $2 million for an O&M reserve fund as recommended by NHA Advisors, the City’s municipal financial advisor.

Additionally, sanitary sewer service rates need to be increased in order to incorporate the CIP .

Two scenarios were modeled that would achieve this goal. The first proposes increasing the service rate to $16.35, with an annual escalation rate of 2%, and the second proposes increasing the service rate to $15.00, with an escalation rate of 4%. (See Sewer Rate Models (Attachment 6).

Fiscal Responsibility

Several other Monterey County cities also discharge their sanitary sewage to M1W . Staff researched the sewer rates of these jurisdictions for comparison. Sanitary sewer service rates fund O&M and CIPs , therefore, rates collected can equate to the investment the cities are making to their system. Based on this, the City of Salinas rate payers are making the lowest investment in Salinas’s sanitary sewer system with less than $0.02 raised for every mile of pipeline, while other jurisdictions invest up to $0.60 per mile of pipeline. (See Table 1 for the complete comparison.)

Table 1: Other Jurisdictions
City Population
Total Sewer
Rate
City Sewer
Rate
Sewer
Pipeline
Lift
Stations Investment
Per EDU
per month
Per EDU
per month Miles No. $ per mile
of pipeline
Salinas 163,542 $ 56.40 $ 5.45 280 11 $ 0.02
Monterey 30,218 $ 65.06 $ 14.11 98 7 $ 0.14
Pacific Grove 15,090 $ 85.78 $ 34.83 58 7 $ 0.60
Seaside 32,366 $ 67.47 $ 16.52 70 4 $ 0.24

Sewer Water Operating and Debt Expenses

A financial model2, was prepared by DTA, that looks at the financial needs to keep the system operational (repairs, staffing and equipment) along with capital improvement s outlined in the SSMP and debt obligations. The financial model is based on current operating and maintenance costs and reflects future estimates influenced by growth assumptions and cost escalation, with the exceptions listed below.

o Existing Debt Obligations – Existing long-term debt repayment obligations are included as Attachment 9 for the City’s Sewer debt. In FY 2025 -26, the City’s annual debt service

2 A financial model is a tool that is used to forecast future financial performance.

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(principal and interest) will be $853,23 3 and will remain at approximately $850,000 for the duration of the life of the bond. The debt obligation will be paid off in FY 2042-43.

New Long-Term Debt – The consultant provided two scenarios in their report with 2 rate increase scenarios. The debt for each scenario is summarized below.

o Scenario 1 includes an initial rate increase to $16.35 monthly per EDU. This financial plan also includes new debt in years 2 (FY 2026-2027), 5 (FY 2029-2030) and 8 (FY 232-2033), totaling $88.6 million in bond issuances and assumes an interest rate of 5.0 percent with a repayment period of 30 years on each bond.

o Scenario 2 includes an initial rate increase to $15.00 monthly per EDU. This financial plan also includes new debt in years 2 (FY 2026-2027), 5 (FY 2029-2030) and 8 (FY 232-2033), totaling $89.4 million in bond issuances and assumes an interest rate of 5.0 percent with a repayment period of 30 years on each bond.

It is also important to note that the City recently received a credit rating downgrade for its outstanding sanitary sewer system revenue debt (from AA- to BBB+). This lower rating does not currently affect the bond debt service but could affect the interest rate for any future debt issuance.

The downgrade was a function of decreasing financial health of the sanitary sewer enterprise fund primarily because of revenue increases not keeping up with the operating costs of the sewer collection system. The City has not increased sanitary sewer service rates since 2012 while continuing to experience increasing operating costs. Without increased sewer service rates, the City will not be able to fund scheduled repairs, identified capital improvement projects or meet the outstanding bond debt service covenants after FY 2024-25.

For demonstration purposes, unless the City is able to increase its rating back to A A-, this downgrade by a major rating agency would increase the annual debt service by $250,000 per year for every $20 million project (adding $7.5M in extra interest payments over the course of 30 years).

Funding Shortfall Impacts

To understand the effects caused by the underfunding of the sanitary sewer system, we only need to look at the sanitary sewer system itself. Many of the over 280 miles of sanitary sewer mains and manholes, particularly those in Districts 2 and 3, date back over 100 years. They are often cracked, full of roots, clogged with grease and dirt, and broken. (See Existing System Photos (Attachment 7)). Equipment in the lift stations is 60 years old at the end of its service life , making it difficult to service and maintain as parts are no longer available for them. As infrastructure ages, failures become more frequent.

In 2021, a failure of the aging sanitary sewer system caused a wastewater backup and release of untreated sewage at East Lake Street and Bridge Street requiring replacement of approximately 500 feet of sanitary sewer mai n and costing over $4.5 million in emergency repairs, thereby depleting the sanitary sewer funds.

In April 2022, a spill of over 53,000 gallons of untreated sewage into Natividad Creek caught the attention of the California Regional Water Quality Control Board (“Regional Board”) as this was Page | 6
a violation of the City’s sanitary sewer discharge permit. In July 2023, the City signed a settlement agreement with the Regional Board agreeing to pay $193,879 in fines and agreeing to make system repairs.

In September 2024, the main discharge pipe from the Lake Street lift station detached filling the station with raw sewage. Again, repair of this failure required emergency repair s to keep the sanitary sewer system operational. The Lake Street lift station is the largest lift station in the City and is located in the heart of the City at East Rossi Street and Wong Way/Lake Street. With its centralized location, the lift station pumps an estimated 5,770 gallons per minute (gpm) of raw sewage from Districts 1, 2, 4, and 6. Development of the FGA will require an increase in flow from the Lake Street pump station to approximately 11,242 gpm, making maintenance of this lift station even more critical. (See Lake Street lift station sewer map (Attachment 8)).

Finance Committee

On its March 4, 2025, the Finance Committee unanimously recommended that the City Council proceed with scenario 1, recommending an increase to the sanitary sewer rate to $16.3 5 and 2% annual escalation rate.

A public comment received during the Finance Committee meeting identified a possible issue with accessory dwelling units (ADU), stating that an ADU is being charged as one EDU by M1W. Staff is researching the impacts of ADUs and will incorporate a recommendation to the City Council at a subsequent meeting, as outlined in the anticipated schedule.

Additionally, staff is researching and evaluating payment assistance programs to address the needs of more income -constrained rate payers while meeting the sanitary sewer utility’s needs and obligations.

Staff’s approach for conducting baseline research on a payment assistance program will include three main elements, 1) an examination of best pr actices, 2) a gap analysis of local assistance programs in Salinas’ service area, and 3) a quantification of necessary funds to support the segment of Salinas’ service population.

Next Steps

In order to properly address existing system deficiencies and f unding shortfalls, it is imper ative that sanitary sewer service rates are properly adjusted. To do so, staff recommends increasing the sewer rates in accordance with Scenario 1 which increases the sewer rates from $5.45 per EDU to $16.35 per EDU with an annual escalation rate of 2%. As an alternative, sewer rates can be adjusted according to the Scenario 2 which would increase from $5.45 per EDU to $15.00 per EDU with an annual escalation of 4%. The adjustment of the sanitary sewer rates will require compliance with the Proposition 218 process. The schedule below provides the anticipated timeline for the required noticing.

Anticipated Schedule
March 4, 2025 Finance Committee - Presentation of rate analysis findings Page | 7
March 11, 2025 City Council Meeting #1 – Presentation of rate analysis findings April 8, 2025 City Council Meeting #2 – Request authorization to initiate notices, set hearing date, and protest process as required by Proposition 218
April 11, 2025 Notices to property owners mailed (45 days prior to hearing) Informational notices to residents
June 3, 2025 City Council Meeting #3 – Public hearing and sewer rate adoption, on results of process
July 1, 2025 New rates effective, depending on results of process

Outreach
Following review and consultation with the Finance Committee and direction from the Council , staff will prepare and distribute information to property owners , residents, and the business industry.

Outreach will focus on maintenance needs, develop ment opportunities and how these may be addressed, focusing on the required investment needed to maintain and expand the system.

CEQA CONSIDERATION:

Not a Project. City of Salinas has determined that the pro posed action is exempt from review under the California Environmental Quality Act (CEQA) pursuant to California Public Resources Code section 21080(b)(8) and CEQA Guidelines section 15273.

STRATEGIC PLAN INITIATIVE:

Updating sewer rates is consistent with the Council values of Fiscal Responsibility, Service and Responsiveness and Council Goals and Strategies of Economic Development, Housing, Infrastructure, and Public Safety by investing in existing facilities and infrastructure and by providing adequate funding for improvement needed to allow for growth.

DEPARTMENTAL COORDINATION:

Public Works staff have consulted with other firms including DTA as sewer rate consultant, Wallace Group as facilities engineer, and NHA Advisors as municipal advisor. Public Works has worked closely with the Finance Department through review of the financial model.

FISCAL AND SUSTAINABILITY IMPACT:

There is no fiscal impact related to receiving the findings of the Sanitary Sewer Rate Analysis and recommending a rate scenario for City Council consideration. Imposing and updating sewer service rates allows the City to be fiscally responsible and sustainable while addressing immediate infrastructure and future growth needs.

ATTACHMENTS:

Attachment 1 – CIP ranking tables (Table 7-2 & 7-3)
Page | 8
Attachment 2 – CIP cost sharing tables
Attachment 3 – Future Growth Area – North of Boronda
Attachment 4 – CIP Schedule
Attachment 5 – DTA memorandum dated February 26, 2025
Attachment 6 – Sewer Rate Model
Attachment 7 – Existing System Photos
Attachment 8 – Lake St Lift Station service area
Attachment 9 – 2020A Wastewater Revenue Refunding Bonds Schedule

TABLE 7-2

CITY OF SALINAS SSMPU

EXISTING HYDRAULIC AND MAINTENANCE REPAIR CIP RANKING MATRIX Importance Factor 5 4 3 2 1
Overflow to Water
B
ody of the State Design Standard Maintenance Hot Spot Community Impact Near City Manhole Monitor Impacted By Future Development Yes - 10
No - 0
Meets Design Standard - 0
Doesn't Meet Design Standards - 2
Surcharging - 5
Overflowing - 10
Not Critical - 0
Yearly Check - 5
Weekly or Monthly Checks - 10
< 5,000 - 0
5,001 to 10,000 - 5
>10,000 - 10
Yes-5
No-0 Yes/No
Cesar Chavez Park
(includes North Madeira Avenue Repairs) Hydraulic Deficiency 10 5 5 10 0 Yes, East Alisal Redevelopment 105 1 Upper Carr Lake Repairs O&M 10 0 10 10 0 Yes, North Boronda FGA 100 2 Upstream TP2 Diversion Hydraulic Deficiency 10 5 0 10 0 No 90 3 Northridge Mall Hydraulic Deficiency 10 5 0 10 0 Yes, Target area K 90 4 East Market and Upstream of Lake Street Repairs O&M 10 0 5 5 0 No 75 5 Louis & Van Buren Repairs O&M 10 0 5 0 5 No 70 6
West Market at Davis Overcrossing O&M 10 0 5 0 0 Yes, West Boronda FGA 65 7 Cherokee Dr Hydraulic Deficiency 0 5 0 10 5 Yes, Target Area K 45 8 Malarin St and Wilgart Way Repairs O&M 0 5 5 5 0 No 45 9 Romie Lane Repairs & Reconfiguration Analysis O&M 0 0 10 5 0 No 40 10 King Street Repairs O&M 0 0 10 0 5 No 35 11
Del Monte and Mae Repairs O&M 0 0 10 0 5 No 35 12
Riker Street Repair O&M 0 0 10 0 5 No 35 13
West Market Street Repairs O&M 0 0 10 0 5 No 35 14
Johnson Place Repairs O&M 0 5 5 0 0 No 35 15
N Main St Hwy 101 Underpass Bunker Repair O&M 0 0 10 0 0 Yes, Target area V 30 16 Donner Way Repair O&M 0 0 10 0 0 No 30 17
San Miguel Ave Repair O&M 0 0 10 0 0 No 30 18
Noice Drive/Tyler Street Hydraulic Deficiency 0 5 0 5 0 No 30 19 Natividad Rd or Alternative Natividad Consolidation Hydraulic Deficiency 0 5 0 5 0 Yes, Target area V, north boronda FGA 30 20 Acacia, Bautista, Woodside Repairs O&M 0 0 5 0 5 No 20 21 Comanche, Polk, and North First Repairs O&M 0 0 5 0 5 Yes, Target area K 20 22 Sherwood Dr Repairs O&M 0 0 5 0 5 Yes, Target area V 20 23 East Laurel and Williams Repairs O&M 0 0 5 0 0 No 15 24 Hoover Street Repair O&M 0 0 5 0 0 No 15 25
Project Name
S
core =
Importance
Factor X Points RankingType of Project
7-5
TABLE 7-2

CITY OF SALINAS SSMPU

EXISTING LIFT STATION CIP RANKING MATRIX
Importance Factor 5 4 3 3 2 2 2 1
Overflow to Water
B
ody of the State Inspection Frequency
Existing Pumping
Capacity Deficiencies
Peak Hour Emergency Response
Time Bypass Required?
Onsite Generator with Automatic
Transfer Switch Required?
Critical Control/Electronic
Upgrades Required? Community Impact
Impacted By Future
Development
Yes - 10
No - 0
Emergency Callouts-10
Daily Inspections-5
Weekly Inspections-0
Yes-10
No-0
0-15 minutes-10
15-30 minutes-5
Greater than 30 minutes-0
Yes-5
No-0
Yes-5
Replace Generator-3
No-0
Yes-5
No-0
< 5,000 - 0
5,001 to 10,000 - 5
>10,000 - 10 Yes/No
Lake St Lift Station 10 10 10 10 0 3 5 10
Y
es, Target Area V, East
Alisal Street/East Market
Street, Central Area and
East Area Specific Plans,
and East Area FGA
Pumps must be upsized
for future flows.
176 1
Santa Rita Lift Station 10 10 0 10 5 3 5 5
Bolsa Knolls Septic
Conversion & Target Area
K 151 2
Carpenter Hall Lift Station 10 5 0 10 5 3 0 10
Yes, North Boronda FGA
and Targe Areas K & V 126 3
De La Torre Lift Station 10 10 0 0 5 5 5 0
Possible, Southeast FGA
Pumps may need to be
upsized for future flows 120 4
Spicer Lift Station 10 10 0 0 5 5 5 0 No 120 5
Mill Lake Lift Station 10 5 0 10 5 0 5 0 No 120 6
Vista Nueva Lift Station 10 10 0 0 0 0 0 0 No 90 7
Las Casitas Lift Station 10 0 0 10 0 0 5 0 No 90 8
TP2 Lift Station 10 0 0 0 5 3 0 10
Yes, East Alisal
Street/East Market Street
and East FGA.

Pumps must be upsized
for future flows. 76 9
Harkins Lift Station 0 10 0 0 5 5 5 0
Yes, Salinas Ag-
Industrial Center
Pumps must be upsized
for future flows 70 10
Airport Lift Station 10 0 0 0 0 0 0 0 Yes, Southeast FGA 50 11 Project Name
S
core =
Importance
Factor X Points Ranking
7-7
TABLE 1.

CITY OF SALINAS EXISTING SEWER CAPITAL IMPROVEMENT PROGRAM (CIP) Project # Title Total Project Cost* Existing Average Daily Flows (gpm)
Future Average Daily Flows
(gpm)
Percentage of Existing
Flows
Percentage of Future
Flows
Existing Project Cost
Allocation
Future Project Cost
Allocation
1 Cesar Chavez Park $ 11,716,600 1,138 1,166 98% 2% $ 11,442,272 274,328$ 2 Upper Carr Lake Repairs $ 1,123,500 598 2,395 25% 75% $ 280,324 843,176$ 3 Upstream TP2 Diversion $ 63,000 655 1,063 62% 38% $ 38,804 24,196$ 4 Northridge Mall $ 2,682,400 347 499 69% 31% $ 1,862,599 819,801$ 5 East Market and Upstream of Lake Street Repairs $ 1,853,880 1,927 3,773 51% 49% $ 946,940 906,940$ 6 Louise and Van Buren Street Repair $ 297,500 138 157 88% 12% $ 261,456 36,044$ 7 West Market at Davis Overcrossing $ 18,690 7,745 7,998 97% 3% $ 18,099 591$ 8 Cherokee Drive $ 2,688,000 1,179 1,970 60% 40% $ 1,608,590 1,079,410$ 9 Malarin St and Wilgart Way Repairs $ 261,240 2 2 100% 0% $ 261,240 -$ 10 Romie Lane Repairs & Reconfiguration Analysis $ 100,000 780 1,316 59% 41% $ 59,256 40,744$ 11 King Street Repairs $ 819,000 9 9 100% 0% $ 819,000 -$ 12 Del Monte and Mae Repairs $ 1,003,800 60 60 100% 0% $ 1,003,800 -$ 13 Riker Street Repair $ 11,200 21 21 100% 0% $ 11,200 -$ 14 West Market Street Repairs $ 1,324,260 73 73 100% 0% $ 1,324,260 -$ 15 Johnson Place Repairs $ 1,174,880 15 15 100% 0% $ 1,174,880 -$ 16 N Main St Hwy 101 Underpass Bunker Repair $ 35,000 152 319 47% 53% $ 16,620 18,380$ 17 Donner Way $ 176,400 65 65 100% 0% $ 176,400 -$ 18 San Miguel Ave Repair $ 6,300 14 14 100% 0% $ 6,300 -$ 19 Noice Drive/Tyler Street $ 4,760,000 299 467 64% 36% $ 3,050,338 1,709,662$ 20 Natividad Rd Consolidation $ 12,768,000 749 749 100% 0% $ 12,768,000 -$ 21 Acacia, Bautista, Woodside Repairs $ 756,700 38 38 100% 0% $ 756,700 -$ 22 Comanche, Polk, and North First Repairs $ 1,143,100 20 20 100% 0% $ 1,143,100 -$ 23 Sherwood Dr Repairs $ 680,960 8 8 100% 0% $ 680,960 -$ 24 East Laurel and Williams Repairs $ 995,400 155 155 100% 0% $ 995,400 -$ 25 Hoover Street Repair $ 22,400 3 3 100% 0% $ 22,400 -$ 26 Katherine Ave & Pajaro St Repairs $ 43,960 780 780 100% 0% $ 43,960 -$ 27 Wood Street Reconfiguration Analysis $ 50,000 32 32 100% 0% $ 50,000 -$ 28 CCTV Program $ 9,392,000 10,460,000 17,715,200 59% 41% $ 5,545,538 $ 3,846,462 29 Inflow/Infiltration Evaluation $ 140,000 10,460,000 17,715,200 59% 41% $ 82,663 $ 57,337 30 Brick Manhole Inspection & New Manhole
Replacement $ 2,419,200.00 10,460,000 17,715,200 59% 41% $ 1,428,425 $ 990,775 31 Flushing Inlet (Cleanout) Inspection & New
Manhole Replacement $ 31,427,200.00 10,460,000 17,715,200 59% 41% $ 18,556,297 $ 12,870,903 EXISTING SEWER PROJECT CIP TOTAL COSTS 89,954,570.00$ $66,435,822.98 23,518,747$ *All CIP costs are expressed in May 2022 dollars, using McGraw-Hill ENR Construction Cost Index of 13004, and will need to be escalated to the year or years scheduled for the work. --
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TABLE 2.

CITY OF SALINAS EXISTING LIFT STATIONS CAPITAL IMPROVEMENT PROGRAM (CIP) Project # Title Total Project Cost Existing Average Daily Flows (gpm)
Future Average Daily
Flows (gpm)
Percentage of Existing
Flows
Percentage of Future
Flows
Existing Project Cost
Allocation
Future Project Cost
Allocation
1 Lake Street Lift Station $ 13,300,000.00 2,536 3,777 67% 33% $ 8,930,050.30 $ 4,369,949.70 2 Santa Rita Lift Station $ 4,900,000.00 224 406 55% 45% $ 2,704,114.31 $ 2,195,885.69 3 Spicer Lift Station $ 3,080,000.00 35 35 100% 0% $ 3,080,000.00 $ - 4 Mill Lake Lift Station $ 3,850,000.00 44 44 100% 0% $ 3,850,000.00 $ - 5 Carpenter Hall Lift Station $ 1,470,000.00 410 431 95% 5% $ 1,398,375.87 $ 71,624.13 6 De La Torre Lift Station $ 1,680,000.00 2 165 1% 99% $ 20,363.64 $ 1,659,636.36 7 Vista Nueva Lift Station $ 3,080,000.00 14 14 100% 0% $ 3,080,000.00 $ - 8 Harkins Road Lift Station $ 1,820,000.00 47 103 46% 54% $ 830,485.44 $ 989,514.56 9 Las Casitas Lift Station $ 910,000.00 46 46 100% 0% $ 910,000.00 $ - 10 TP2 Lift Station $ 3,500,000.00 94 198 47% 53% $ 1,661,616.16 $ 1,838,383.84 11 Airport Lift Station $ 1,120,000.00 21 21 100% 0% $ 1,120,000.00 $ - $ 38,710,000.00 $ 27,585,005.72 $ 11,124,994.28 *All CIP costs are expressed in May 2022 dollars, using McGraw-Hill ENR Construction Cost Index of 13004, and will need to be escalated to the year or years scheduled for the work.

EXISTING LIFT STATION CIP TOTAL COSTS --
2 of 3
TABLE 3.

CITY OF SALINAS FUTURE SEWER CAPITAL IMPROVEMENT PROGRAM (CIP) Project # Title Total Project Cost* Existing Average Daily Flows (gpm)
Future Average Daily
Flows (gpm)
Percentage of Existing
Flows
Percentage of Future
Flows
Existing Project Cost
Allocation
Future Project Cost
Allocation
1 San Juan Grade $ 3,318,000.00 126 157 81% 19% $ 2,671,245.52 $ 646,754.48 2 North Davis Road $ 11,802,000.00 1,412 2,236 63% 37% $ 7,455,961.35 $ 4,346,038.65 3 West Laurel Drive 1,428,000.00$ 167 335 50% 50% $ 713,285.67 $ 714,714.33 4 Victor Street 1,750,000.00$ 3,396 5,585 61% 39% $ 1,064,183.58 $ 685,816.42 5 Freedom Parkway 4,592,000.00$ 45 858 5% 95% $ 243,096.35 $ 4,348,903.65 6 Natividad Creek Park 6,426,000.00$ 386 1,930 20% 80% $ 1,284,117.49 $ 5,141,882.51 7 East Alisal Street 8,092,000.00$ 655 1,063 62% 38% $ 4,984,456.99 $ 3,107,543.01 8 Abbott Street $ 2,688,000.00 96 675 14% 86% $ 380,670.19 $ 2,307,329.81 9 South Sanborn Road 8,372,000.00$ 973 2,123 46% 54% $ 3,836,420.54 $ 4,535,579.46 48,468,000.00$ $ 22,633,437.68 $ 25,834,562.32 --FUTURE SEWER PROJECT CIP TOTAL COSTS *All CIP costs are expressed in May 2022 dollars, using McGraw-Hill ENR Construction Cost Index of 13004, and will need to be escalated to the year or years scheduled for the work. 3 of 3

14 2024 2025 2026 2027 2028 2029 2030 2031 2032 2033 2034 2035 Project 1
Project 2
Project 3
Project 4
Project 5
Project 6
Project 7
Project 8
Project 10
Project 11
Project 12
Project 13
Project 14
Project 16
Project 17
Project 18
Project 19
CCTV
Maintenance CIP Schedule
15 2024 2025 2026 2027 2028 2029 2030 2031 2032 2033 2034 2035 Project 1
Project 2
Project 3
Project 4
Project 5
Project 6
Project 11
Lift Station CIP Schedule
16 2024 2025 2026 2027 2028 2029 2030 2031 2032 2033 2034 2035 Project 1
Project 2
Project 5
Project 6
Project 7
Project 8
Project 9
Future CIP Schedule
www.FinanceDTA.com
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MEMORANDUM
February 26, 2025
To: Adriana Robles, City of Salinas
From: Andrea Roess, Steve Runk, Nehal Thumar, DTA
Subject: Sewer Rate Analysis
The City’s current sewer rate structure has been in place for several years, with limited updates since its initial implementation. Over the years, the City has undertaken various studies to assess the adequacy of sewer rates in relation to the costs of op erating and maintaining the sewer system. Recently, the City hired DTA to evaluate potential rate structures and provide recommendations on how best to address funding gaps for sewer infrastructure upgrades and long-term sewer system needs.

I. Current Sewer Rate Structure
For Fiscal Year 2024 -25, the City’s sewer rate is set at $5.45 per Equivalent Dwelling Unit (“EDU”) per month. Based on data provided by Monterey OneWater (“Monterey One”), there are approximately 60,000 EDUs in the City. For reference, Monterey One is the sewer treatment provider in northern Monterey County. Monterey One is responsible for the treatment of wastewater while the City is responsible for collecting and transporting wastewater to Monterey One. This shared responsibility is r eflected on the monthly bill to property owners.

The current City sewer rate structure is intended to cover the City’s annual operation and maintenance (“O&M”) costs, as well as servicing existing debt obligations. The City sewer enterprise fund’s expected revenue and annual budget is projected to experience a shortfall of approximately $400,000 for Fiscal Year 2024-25 and will not meet the required 125% debt service coverage requirement on the existing bonds . In addition, the current budget does not include capital improvements required for system replac ements and upgrades. For reference, the existing rate of $5.45 per EDU would need to be increased to $9.54 to meet the 125% debt service coverage requirement on the existing bonds as well as fund $2 million for an O&M reserve fund as recommended by NHA Advisors, the City’s municipal advisor.

II. Rate Analysis
An essential element of the rate analysis is the capital costs and the timing of the facilities to be funded by the rate revenue. The Wallace Group (“Wallace”), the City’s engineering partner prepared a Capital Improvement Plan (“CIP”) outlining capital costs over a 10-year study period . The City then identified key infrastructure costs equal to $114.8 million (escalated value) to be funded through sewer rates and bonds over the 10 -year study period.

It is evident that there are many combinations of assumptions that affect the determination of a rate structure calculation that can potentially meet the revenue requirements on an annual basis. Factors including inflation, annual rate escalations, debt service and customer growth play into the determination of such a rate structure. DTA utilized a spreadsheet model to assist in analyzing various rate scenarios based on assumptions and analysis criteria as described in greater detail in Attachment 3 herein.

Page 2 ends

City of Salinas Sewer Rate Analysis
III. Proposed Sewer Rate Scenarios
DTA presents the following two rate scenarios based on the capital costs as described above:
o Scenario 1 – Fund annual O&M and a minimum level of capital costs through pay-as-you-go rate collections andthe maximum amount ofBonds assuming a minimum debt service coverage of 125% after final bond issue . This approach results in a large rate increase in the first year and escalates 2% annually thereafter.
o Scenario 2 – Fund annual O&M and a minimum level of capital costs through pay-as-you-go rate collections andthe maximum amount ofBonds assuming a minimum debt service coverage of 125%as well as an increase in the sewer rate of 4% annually.

Projections under both scenarios suggest that the City will have sufficient reserves to continue meeting debt service and capital needs by the end of FY 2034 -35. Please see the table below for a summary of the findings of each scenario:

Scenario Year 1
Monthly
Rate per
EDU
(2025)
Year 5
Monthly
Rate per
EDU
(2029)
Year 10
Monthly
Rate per
EDU
(2034)
Year 10 CIP
Fund
Balance
(2034)
Total Pay-
As-You-Go
for Facilities
Total
Bond
Proceeds
Total
Facilities
Funded
1- Costs funded between Pay-
Go and max Bonds (2% Annual
Rate Escalator)
$16.35 $17.70 $19.54 $7.5m $35.4m $79.4m $114.8m
2- Costs funded between Pay-
Go and max Bonds (4% Annual
Rate Escalator)
$15.00 $17.55 $21.35 $7.5m $34.8m $80.0m $114.8m
Please note that the rate shown above is a rate per EDU . This rate will be applied to the various land uses based on the EDU factor for each land use. For instance, one residential unit (1.00 EDU) would see a rate of $ 16.35 month, while a Hotel/Motel room (0.43 EDU) would see a rate of $7.03 per month.

Attachments :

1. Attachment 1 – Increase rate assuming maximum bonding capacity with minimum debt service coverage of 125% following final bond issue and annual rate increase of 2% (31% of costs funded through pay -as-you-go and 69% of costs funded with bond issues)

2. Attachment 2 – Increase rate assuming maximum bonding capacity with minimum debt service coverage of 125% and annual rate increase of 4% (30% of costs funded through pay-as-you-go and 70% of costs funded with bond issues)

3. Assumptions Utilized in the Rate Model
ATTACHMENT 1
SCENARIO 1:

INCREASE RATE

ASSUMING MAXIMUM

BONDING CAPACITY
WITH MINIMUM 125%

COVERAGE AFTER FINAL

BOND ISSUE AND

ANNUAL RATE
INCREASE OF 2%
(31% OF COSTS FUNDED

THROUGH PAY -AS-
YOU-GO AND 69% OF

COSTS FUNDED WITH

BOND ISSUES)
Study Year Number Current
Budget1 1 2 3 4 5 6 7 8 9 10
Calendar Year 2024-2025 2025-2026 2026-2027 2027-2028 2028-2029 2029-2030 2030-2031 2031-2032 2032-2033 2033-2034 2034-2035 Rate ($ per EDU -Monthly) 5.45$ 16.35$ 16.68$ 17.01$ 17.35$ 17.70$ 18.05$ 18.41$ 18.78$ 19.16$ 19.54$ 200.00% 2.00% 2.00% 2.00% 2.00% 2.00% 2.00% 2.00% 2.00% 2.00% EDUs 60,558 60,558 61,164 61,776 62,393 63,017 63,647 64,284 64,927 65,576 66,232 Operations
Operating Revenue
City of Salinas Rate Revenue 3,960,518$ 11,881,554$ 12,240,377$ 12,610,037$ 12,990,860$ 13,383,184$ 13,787,356$ 14,203,734$ 14,632,687$ 15,074,594$ 15,529,847$ Investment Interest
Net Income Carry Forward from Prior Year 0 0 0 0 0 0 0 0 0 0 0 Inspection Fees
Total Operating Revenue 3,960,518$ 11,881,554$ 12,240,377$ 12,610,037$ 12,990,860$ 13,383,184$ 13,787,356$ 14,203,734$ 14,632,687$ 15,074,594$ 15,529,847$ 136,334,229$ Operational Expenses
Salaries and Benefits 1,954,090$ 2,100,647$ 2,258,195$ 2,427,560$ 2,609,627$ 2,805,349$ 3,015,750$ 3,241,931$ 3,485,076$ 3,746,457$ 4,027,441$ Supplies and Materials 241,000$ 259,075$ 278,506$ 299,394$ 321,848$ 345,987$ 371,936$ 399,831$ 429,818$ 462,055$ 496,709$ Outside Services 388,000$ 417,100$ 448,383$ 482,011$ 518,162$ 557,024$ 598,801$ 643,711$ 691,989$ 743,889$ 799,680$ Other Charges 397,500$ 427,313$ 459,361$ 493,813$ 530,849$ 570,663$ 613,462$ 659,472$ 708,932$ 762,102$ 819,260$ NPDES Allocation 536,920$ 577,189$ 620,478$ 667,014$ 717,040$ 770,818$ 828,629$ 890,777$ 957,585$ 1,029,404$ 1,106,609$ Total Operational Expenses 3,517,510$ 3,781,323$ 4,064,922$ 4,369,792$ 4,697,526$ 5,049,841$ 5,428,579$ 5,835,722$ 6,273,401$ 6,743,906$ 7,249,699$ 53,494,711$ Net Operating Income before Debt Service 443,008$ 8,100,231$ 8,175,455$ 8,240,245$ 8,293,334$ 8,333,343$ 8,358,777$ 8,368,012$ 8,359,286$ 8,330,688$ 8,280,148$ 82,839,518$ Debt Service
Current Debt Service 856,080$ 865,385$ 863,002$ 859,384$ 863,658$ 862,054$ 864,951$ 861,608$ 862,093$ 856,582$ 860,170$ 8,618,887$ First Issuance -$ -$ 2,832,990$ 2,832,990$ 2,832,990$ 2,832,990$ 2,832,990$ 2,832,990$ 2,832,990$ 2,832,990$ Second Issuance -$ -$ -$ -$ - $ 1,017,404$ 1,017,404$ 1,017,404$ 1,017,404$ 1,017,404$ Third Issuance -$ -$ -$ -$ - $ -$ -$ -$ 1,892,346$ 1,892,346$ Total Debt Service 856,080$ 865,385$ 863,002$ 3,692,374$ 3,696,648$ 3,695,044$ 4,715,346$ 4,712,002$ 4,712,487$ 6,599,323$ 6,602,911$ Debt Service Ratio (1.25 Minimum) 0.52 9.36 9.47 2.23 2.24 2.26 1.77 1.78 1.77 1.26 1.25 Net Operating Income After Debt Service (413,072)$ 7,234,846$ 7,312,453$ 4,547,871$ 4,596,685$ 4,638,299$ 3,643,432$ 3,656,010$ 3,646,799$ 1,731,365$ 1,677,237$ 42,684,997$ .

Transfer to Operating Reserve (2,000,000)$ -$ -$ - $ -$ -$ -$ -$ -$ Transfer to Capital Replacement Program (7,234,846)$ (5,312,453)$ (4,547,871)$ (4,596,685)$ (4,638,299)$ (3,643,432)$ (3,656,010)$ (3,646,799)$ (1,731,365)$ (1,677,237)$ (40,684,997)$ Net Year End Balance in Operating Account -$ -$ -$ -$ - $ -$ -$ -$ -$ -$ Fiscal Year 1 2 3 4 5 6 7 8 9 10
2024-2025 2025-2026 2026-2027 2027-2028 2028-2029 2029-2030 2030-2031 2031-2032 2032-2033 2033-2034 2034-2035 Operating Reserve Fund Balance
Carry Forward from Prior Year - $ -$ 2,000,000$ 2,000,000$ 2,000,000$ 2,000,000$ 2,000,000$ 2,000,000$ 2,000,000$ 2,000,000$ 2,000,000$ Interest Earnings on Fund Balance 40,000$ 40,000$ 40,000$ 40,000$ 40,000$ 40,000$ 40,000$ 40,000$ Less: Transfer Interest Earnings to Capital Fund 40,000$ 40,000$ 40,000$ 40,000$ 40,000$ 40,000$ 40,000$ 40,000$ Less: Outlay - $ -$ -$ -$ -$ - $ -$ -$ -$ -$ -$
Year End Balance -$ 2,000,000$ 2,000,000$ 2,000,000$ 2,000,000$ 2,000,000$ 2,000,000$ 2,000,000$ 2,000,000$ 2,000,000$ Fiscal Year 1 2 3 4 5 6 7 8 9 10
2024-2025 2025-2026 2026-2027 2027-2028 2028-2029 2029-2030 2030-2031 2031-2032 2032-2033 2033-2034 2034-2035 Capital Replacement Fund Balances
Carry Forward from Prior Year 0 -$ 1,071,724$ 32,208,550$ 16,578,055$ 52,013$ 8,906,534$ 3,513,557$ 52,494$ 19,623,900$ 11,590,980$ Transfer In from Operating Account 0 7,234,846$ 5,312,453$ 4,547,871$ 4,596,685$ 4,638,299$ 3,643,432$ 3,656,010$ 3,646,799$ 1,731,365$ 1,677,237$ 40,684,997$ Interest Earnings on Fund Balance 0 21,434$ 644,171$ 331,561$ 1,040$ 178,131$ 70,271$ 1,050$ 392,478$ 231,820$ 1,871,956$ Interest Earnings from Operating Reserve -$ 40,000$ 40,000$ 40,000$ 40,000$ 40,000$ 40,000$ 40,000$ 40,000$ 320,000$ Bond Issuance -$ 39,192,760$ -$ -$ 14,075,196$ -$ -$ 26,179,504$ -$ -$ Less: Capital Outlay for Projects -$ 6,163,122$ 13,389,822$ 20,862,537$ 21,494,288$ 9,900,014$ 9,254,539$ 7,227,344$ 10,295,947$ 10,196,763$ 6,037,883$ 114,822,258$ Year End Balance -$ 1,071,724$ 32,208,550$ 16,578,055$ 52,013$ 8,906,534$ 3,513,557$ 52,494$ 19,623,900$ 11,590,980$ 7,502,154$ Notes:

1. The current monthly rate per EDU of $5.45 is insufficient to meet operating expenses and debt service requirements. A monthly rate of $9.54 per EDU would be required to breakeven.

5.00% 5.00% 5.00%
30 30 30

3.50% 3.50% 3.50%

0.00% 0.00% 0.00%

6.51% 6.51% 6.51%
$43,550,000 $15,640,000 $29,090,000
Uniform Series Factor 0.065051 Uniform Series Factor 0.065051 Uniform Series Factor 0.065051 2,832,990$ 1,017,404$ 1,892,346$
BOND PROCEEDS 39,192,760$ BOND PROCEEDS 14,075,196$ BOND PROCEEDS 26,179,504$ 2 5 8
Assumptions: Criteria:

O&M Inflation Factor = 7.5% 1. Minimal year end balance at 10th year Total CIP Bond Proceeds PayGo Annual Rate Escalation= 2% 2. CIP funded through 31% rates and 69% bonds 114,822,258$ 79,447,459$ 35,374,799$ Annual EDU Growth Rate= 1% 3. Bonds Issued in Years 2,5 and 8 100.00% 69.19% 30.81% Minimum Debt Service Ratio= 1.25% 4. CIP based on costs and timeline provided by Wallace and adjusted by City Rate Stabilization Fund not required 5. Transfer of $2,000,000 to O&M reserve fund

ISSUANCE IN STUDY YEAR

BOND TERM (YEARS)
COST OF ISSUANCE (%)

BOND PREMIUM

RESERVE FUND

BOND AMOUNT

ANNUAL PAYMENT
COST OF ISSUANCE (%)

BOND PREMIUM

RESERVE FUND

BOND AMOUNT

ANNUAL PAYMENT

ISSUANCE IN STUDY YEAR
Totals
Totals
Years 1-10
City of Salinas - Sewer Rates/Max Bonding Capacity with minimum 125% coverage (31% PayGo with 69% Bonds) Calendar Years 2025-2034

AVERAGE COUPON

SECOND ISSUANCE

AVERAGE COUPON

THIRD ISSUANCE

AVERAGE COUPON
CIP Allocation

ISSUANCE IN STUDY YEAR

FIRST ISSUANCE

BOND TERM (YEARS)
COST OF ISSUANCE (%)

BOND PREMIUM

RESERVE FUND

BOND AMOUNT

ANNUAL PAYMENT

BOND TERM (YEARS)
ATTACHMENT 2
SCENARIO 2:

INCREASE RATE

ASSUMING MAXIMUM

BONDING CAPACITY
WITH MINIMUM 125%

COVERAGE AND

ANNUAL RATE
INCREASE OF 4%
(30% OF COSTS FUNDED

THROUGH PAY -AS-
YOU-GO AND 70% OF

COSTS FUNDED WITH

BOND ISSUES)
Study Year Number Current
Budget1 1 2 3 4 5 6 7 8 9 10
Fiscal Year 2024-2025 2025-2026 2026-2027 2027-2028 2028-2029 2029-2030 2030-2031 2031-2032 2032-2033 2033-2034 2034-2035 Rate ($ per EDU -Monthly) 5.45$ 15.00$ 15.60$ 16.22$ 16.87$ 17.55$ 18.25$ 18.98$ 19.74$ 20.53$ 21.35$ Annual Rate Escalation 175.23% 4.00% 4.00% 4.00% 4.00% 4.00% 4.00% 4.00% 4.00% 4.00% EDUs 60,558 60,558 61,164 61,776 62,393 63,017 63,647 64,284 64,927 65,576 66,232 Operations
Operating Revenue
City of Salinas Rate Revenue 3,960,518$ 10,900,509$ 11,449,894$ 12,026,969$ 12,633,128$ 13,269,838$ 13,938,638$ 14,641,145$ 15,379,059$ 16,154,163$ 16,968,333$ Investment Interest
Net Income Carry Forward from Prior Year 0 0 0 0 0 0 0 0 0 0 0 Inspection Fees
Total Operating Revenue 3,960,518$ 10,900,509$ 11,449,894$ 12,026,969$ 12,633,128$ 13,269,838$ 13,938,638$ 14,641,145$ 15,379,059$ 16,154,163$ 16,968,333$ 137,361,675$ Operational Expenses
Salaries and Benefits 1,954,090$ 2,100,647$ 2,258,195$ 2,427,560$ 2,609,627$ 2,805,349$ 3,015,750$ 3,241,931$ 3,485,076$ 3,746,457$ 4,027,441$ Supplies and Materials 241,000$ 259,075$ 278,506$ 299,394$ 321,848$ 345,987$ 371,936$ 399,831$ 429,818$ 462,055$ 496,709$ Outside Services 388,000$ 417,100$ 448,383$ 482,011$ 518,162$ 557,024$ 598,801$ 643,711$ 691,989$ 743,889$ 799,680$ Other Charges 397,500$ 427,313$ 459,361$ 493,813$ 530,849$ 570,663$ 613,462$ 659,472$ 708,932$ 762,102$ 819,260$ NPDES Allocation 536,920$ 577,189$ 620,478$ 667,014$ 717,040$ 770,818$ 828,629$ 890,777$ 957,585$ 1,029,404$ 1,106,609$ Total Operational Expenses 3,517,510$ 3,781,323$ 4,064,922$ 4,369,792$ 4,697,526$ 5,049,841$ 5,428,579$ 5,835,722$ 6,273,401$ 6,743,906$ 7,249,699$ 53,494,711$ Net Operating Income before Debt Service 443,008$ 7,119,185$ 7,384,972$ 7,657,177$ 7,935,602$ 8,219,997$ 8,510,059$ 8,805,423$ 9,105,658$ 9,410,257$ 9,718,634$ 83,866,964$ Debt Service
Current Debt Service 856,080$ 865,385$ 863,002$ 859,384$ 863,658$ 862,054$ 864,951$ 861,608$ 862,093$ 856,582$ 860,170$ 8,618,887$ First Issuance -$ -$ 3,060,670$ 3,060,670$ 3,060,670$ 3,060,670$ 3,060,670$ 3,060,670$ 3,060,670$ 3,060,670$ Second Issuance -$ -$ -$ -$ - $ 1,034,968$ 1,034,968$ 1,034,968$ 1,034,968$ 1,034,968$ Third Issuance -$ -$ -$ -$ - $ -$ -$ -$ 1,685,483$ 1,685,483$ Total Debt Service 856,080$ 865,385$ 863,002$ 3,920,054$ 3,924,328$ 3,922,724$ 4,960,590$ 4,957,246$ 4,957,731$ 6,637,703$ 6,641,291$ Debt Service Ratio (1.25 Minimum) 0.52 8.23 8.56 1.95 2.02 2.10 1.72 1.78 1.84 1.42 1.46 Net Operating Income After Debt Service (413,072)$ 6,253,800$ 6,521,970$ 3,737,123$ 4,011,274$ 4,297,273$ 3,549,470$ 3,848,177$ 4,147,927$ 2,772,554$ 3,077,343$ 42,216,910$ .

Transfer to Operating Reserve (2,000,000)$ -$ -$ - $ -$ -$ -$ -$ -$ Transfer to Capital Replacement Program (6,253,800)$ (4,521,970)$ (3,737,123)$ (4,011,274)$ (4,297,273)$ (3,549,470)$ (3,848,177)$ (4,147,927)$ (2,772,554)$ (3,077,343)$ (40,216,910)$ Net Year End Balance in Operating Account -$ -$ -$ -$ - $ -$ -$ -$ -$ -$ Fiscal Year 1 2 3 4 5 6 7 8 9 10
2024-2025
Operating Reserve Fund Balance 2025-2026 2026-2027 2027-2028 2028-2029 2029-2030 2030-2031 2031-2032 2032-2033 2033-2034 2034-2035 Carry Forward from Prior Year - $ -$ 2,000,000$ 2,000,000$ 2,000,000$ 2,000,000$ 2,000,000$ 2,000,000$ 2,000,000$ 2,000,000$ 2,000,000$ Interest Earnings on Fund Balance 40,000$ 40,000$ 40,000$ 40,000$ 40,000$ 40,000$ 40,000$ 40,000$ Less: Transfer Interest Earnings to Capital Fund 40,000$ 40,000$ 40,000$ 40,000$ 40,000$ 40,000$ 40,000$ 40,000$ Less: Outlay - $ -$ -$ -$ -$ - $ -$ -$ -$ -$ -$
Year End Balance -$ 2,000,000$ 2,000,000$ 2,000,000$ 2,000,000$ 2,000,000$ 2,000,000$ 2,000,000$ 2,000,000$ 2,000,000$ Fiscal Year 1 2 3 4 5 6 7 8 9 10
2024-2025 2025-2026 2026-2027 2027-2028 2028-2029 2029-2030 2030-2031 2031-2032 2032-2033 2033-2034 2034-2035 Capital Replacement Fund Balances
Carry Forward from Prior Year 0 -$ 90,678$ 33,567,220$ 17,153,151$ 53,199$ 8,809,704$ 3,320,828$ 48,078$ 17,258,686$ 10,219,651$ Transfer In from Operating Account 0 6,253,800$ 4,521,970$ 3,737,123$ 4,011,274$ 4,297,273$ 3,549,470$ 3,848,177$ 4,147,927$ 2,772,554$ 3,077,343$ 40,216,910$ Interest Earnings on Fund Balance 0 1,814$ 671,344$ 343,063$ 1,064$ 176,194$ 66,417$ 962$ 345,174$ 204,393$ 1,810,424$ Interest Earnings from Operating Reserve -$ 40,000$ 40,000$ 40,000$ 40,000$ 40,000$ 40,000$ 40,000$ 40,000$ 320,000$ Bond Issuance -$ 42,342,580$ -$ -$ 14,318,182$ -$ -$ 23,317,667$ -$ -$ Less: Capital Outlay for Projects -$ 6,163,122$ 13,389,822$ 20,862,537$ 21,494,288$ 9,900,014$ 9,254,539$ 7,227,344$ 10,295,947$ 10,196,763$ 6,037,883$ 114,822,258$ Year End Balance -$ 90,678$ 33,567,220$ 17,153,151$ 53,199$ 8,809,704$ 3,320,828$ 48,078$ 17,258,686$ 10,219,651$ 7,503,504$ Notes:

1. The current monthly rate per EDU of $5.45 is insufficient to meet operating expenses and debt service requirements. A monthly rate of $9.54 per EDU would be required to breakeven.

5.00% 5.00% 5.00%
30 30 30

3.50% 3.50% 3.50%

0.00% 0.00% 0.00%

6.51% 6.51% 6.51%
$47,050,000 $15,910,000 $25,910,000
Uniform Series Factor 0.065051 Uniform Series Factor 0.065051 Uniform Series Factor 0.065051 3,060,670$ 1,034,968$ 1,685,483$
BOND PROCEEDS 42,342,580$ BOND PROCEEDS 14,318,182$ BOND PROCEEDS 23,317,667$ 2 5 8
Assumptions: Criteria:

O&M Inflation Factor = 7.5% 1. Minimal year end balance at 10th year Total CIP Bond Proceeds PayGo Annual Rate Escalation= 4% 2. CIP funded through 30% rates and 70% bonds 114,822,258$ 79,978,429$ 34,843,830$ Annual EDU Growth Rate= 1% 3. Bonds Issued in Years 2,5 and 8 100.00% 69.65% 30.35% Minimum Debt Service Ratio= 1.25% 4. CIP based on costs and timeline provided by Wallace and adjusted by City Rate Stabilization Fund not required 5. Transfer of $2,000,000 to O&M reserve fund COST OF ISSUANCE (%)

BOND PREMIUM

RESERVE FUND

BOND AMOUNT

ANNUAL PAYMENT

ISSUANCE IN STUDY YEAR ISSUANCE IN STUDY YEAR

BOND TERM (YEARS)
COST OF ISSUANCE (%)

BOND PREMIUM

RESERVE FUND

BOND AMOUNT

ANNUAL PAYMENT
City of Salinas - Sewer Rates/Max Bonding Capacity with minimum 125% coverage (30% PayGo with 70% Bonds) Fiscal Years 2025-2026 through 2034-2035

AVERAGE COUPON

SECOND ISSUANCE

AVERAGE COUPON

THIRD ISSUANCE

AVERAGE COUPON
Totals
Totals
Years 1-10
CIP Allocation

ISSUANCE IN STUDY YEAR

FIRST ISSUANCE

BOND TERM (YEARS)
COST OF ISSUANCE (%)

BOND PREMIUM

RESERVE FUND

BOND AMOUNT

ANNUAL PAYMENT

BOND TERM (YEARS)
ATTACHMENT 3

ASSUMPTIONS
Key assumptions for a 10-year study period:
 7.5% Estimated Annual O&M Cost Inflation
 3.0% Estimated Annual Capital Facilities Cost Inflation  2% Estimated Annual Rate Escalation for pay-as-you-go & bond scenario 1 and 4% for scenario 2 (i.e., costs funded between pay-as-you-go and bonds)  2% Estimated Investment Return on Reserve Balances
 1% Annual Development Growth: The City and Wallace Group expects a modest increase in the number of EDUs over the next decade as the population grows.

Assumptions related to the bonding scenarios are as follows:
 Bonds to be issued in Years 2, 5, and 8
 Bond interest rate is equal to 5.00%
 Construction proceeds equal to 90% of the bond issue amount  Bond Term of 30 years
 Minimum 125% debt service coverage
Rate model incorporates the following criteria:
 Positive net operating income after debt service (i.e., net operating income is rate revenue less O&M and debt service)
 Fund $2 million O&M reserve fund
 Positive net operating income after debt service in any given year will be transferred to the Capital Replacement Fund
 The beginning Capital Replacement Fund balance is $0(i.e., Capital Replacement Fund consists of net operating income deposited to fund plus interest earnings plus bond proceeds less costs for capital facilities)
 Capital Replacement Fund expenditures over 10 years will be in accordance with the timeline provided by Wallace
Study Year Number Current
Budget1 1 2 3 4 5 6 7 8 9 10
Calendar Year 2024-2025 2025-2026 2026-2027 2027-2028 2028-2029 2029-2030 2030-2031 2031-2032 2032-2033 2033-2034 2034-2035 Rate ($ per EDU -Monthly) 5.45$ 16.35$ 16.68$ 17.01$ 17.35$ 17.70$ 18.05$ 18.41$ 18.78$ 19.16$ 19.54$ 200.00% 2.00% 2.00% 2.00% 2.00% 2.00% 2.00% 2.00% 2.00% 2.00% EDUs 60,558 60,558 61,164 61,776 62,393 63,017 63,647 64,284 64,927 65,576 66,232 Operations
Operating Revenue
City of Salinas Rate Revenue 3,960,518$ 11,881,554$ 12,240,377$ 12,610,037$ 12,990,860$ 13,383,184$ 13,787,356$ 14,203,734$ 14,632,687$ 15,074,594$ 15,529,847$ Investment Interest
Net Income Carry Forward from Prior Year 0 0 0 0 0 0 0 0 0 0 0 Inspection Fees
Total Operating Revenue 3,960,518$ 11,881,554$ 12,240,377$ 12,610,037$ 12,990,860$ 13,383,184$ 13,787,356$ 14,203,734$ 14,632,687$ 15,074,594$ 15,529,847$ 136,334,229$ Operational Expenses
Salaries and Benefits 1,954,090$ 2,100,647$ 2,258,195$ 2,427,560$ 2,609,627$ 2,805,349$ 3,015,750$ 3,241,931$ 3,485,076$ 3,746,457$ 4,027,441$ Supplies and Materials 241,000$ 259,075$ 278,506$ 299,394$ 321,848$ 345,987$ 371,936$ 399,831$ 429,818$ 462,055$ 496,709$ Outside Services 388,000$ 417,100$ 448,383$ 482,011$ 518,162$ 557,024$ 598,801$ 643,711$ 691,989$ 743,889$ 799,680$ Other Charges 397,500$ 427,313$ 459,361$ 493,813$ 530,849$ 570,663$ 613,462$ 659,472$ 708,932$ 762,102$ 819,260$ NPDES Allocation 536,920$ 577,189$ 620,478$ 667,014$ 717,040$ 770,818$ 828,629$ 890,777$ 957,585$ 1,029,404$ 1,106,609$ Total Operational Expenses 3,517,510$ 3,781,323$ 4,064,922$ 4,369,792$ 4,697,526$ 5,049,841$ 5,428,579$ 5,835,722$ 6,273,401$ 6,743,906$ 7,249,699$ 53,494,711$ Net Operating Income before Debt Service 443,008$ 8,100,231$ 8,175,455$ 8,240,245$ 8,293,334$ 8,333,343$ 8,358,777$ 8,368,012$ 8,359,286$ 8,330,688$ 8,280,148$ 82,839,518$ Debt Service
Current Debt Service 856,080$ 865,385$ 863,002$ 859,384$ 863,658$ 862,054$ 864,951$ 861,608$ 862,093$ 856,582$ 860,170$ 8,618,887$ First Issuance -$ -$ 2,832,990$ 2,832,990$ 2,832,990$ 2,832,990$ 2,832,990$ 2,832,990$ 2,832,990$ 2,832,990$ Second Issuance -$ -$ -$ -$ - $ 1,017,404$ 1,017,404$ 1,017,404$ 1,017,404$ 1,017,404$ Third Issuance -$ -$ -$ -$ - $ -$ -$ -$ 1,892,346$ 1,892,346$ Total Debt Service 856,080$ 865,385$ 863,002$ 3,692,374$ 3,696,648$ 3,695,044$ 4,715,346$ 4,712,002$ 4,712,487$ 6,599,323$ 6,602,911$ Debt Service Ratio (1.25 Minimum) 0.52 9.36 9.47 2.23 2.24 2.26 1.77 1.78 1.77 1.26 1.25 Net Operating Income After Debt Service (413,072)$ 7,234,846$ 7,312,453$ 4,547,871$ 4,596,685$ 4,638,299$ 3,643,432$ 3,656,010$ 3,646,799$ 1,731,365$ 1,677,237$ 42,684,997$ .

1. The current monthly rate per EDU of $5.45 is insufficient to meet operating expenses and debt service requirements. A monthly rate of $9.54 per EDU would be required to breakeven.

5.00% 5.00% 5.00%
30 30 30

3.50% 3.50% 3.50%

0.00% 0.00% 0.00%

ISSUANCE IN STUDY YEAR

BOND TERM (YEARS)
COST OF ISSUANCE (%)

BOND PREMIUM

RESERVE FUND

BOND AMOUNT

ANNUAL PAYMENT
COST OF ISSUANCE (%)

BOND PREMIUM

RESERVE FUND

BOND AMOUNT

ANNUAL PAYMENT

ISSUANCE IN STUDY YEAR
Totals
Totals
Years 1-10
City of Salinas - Sewer Rates/Max Bonding Capacity with minimum 125% coverage (31% PayGo with 69% Bonds) Calendar Years 2025-2034

AVERAGE COUPON

SECOND ISSUANCE

AVERAGE COUPON

THIRD ISSUANCE

AVERAGE COUPON
CIP Allocation

ISSUANCE IN STUDY YEAR

FIRST ISSUANCE

BOND TERM (YEARS)
COST OF ISSUANCE (%)

BOND PREMIUM

RESERVE FUND

BOND AMOUNT

ANNUAL PAYMENT

BOND TERM (YEARS)
Study Year Number Current
Budget1 1 2 3 4 5 6 7 8 9 10
Fiscal Year 2024-2025 2025-2026 2026-2027 2027-2028 2028-2029 2029-2030 2030-2031 2031-2032 2032-2033 2033-2034 2034-2035 Rate ($ per EDU -Monthly) 5.45$ 15.00$ 15.60$ 16.22$ 16.87$ 17.55$ 18.25$ 18.98$ 19.74$ 20.53$ 21.35$ Annual Rate Escalation 175.23% 4.00% 4.00% 4.00% 4.00% 4.00% 4.00% 4.00% 4.00% 4.00% EDUs 60,558 60,558 61,164 61,776 62,393 63,017 63,647 64,284 64,927 65,576 66,232 Operations
Operating Revenue
City of Salinas Rate Revenue 3,960,518$ 10,900,509$ 11,449,894$ 12,026,969$ 12,633,128$ 13,269,838$ 13,938,638$ 14,641,145$ 15,379,059$ 16,154,163$ 16,968,333$ Investment Interest
Net Income Carry Forward from Prior Year 0 0 0 0 0 0 0 0 0 0 0 Inspection Fees
Total Operating Revenue 3,960,518$ 10,900,509$ 11,449,894$ 12,026,969$ 12,633,128$ 13,269,838$ 13,938,638$ 14,641,145$ 15,379,059$ 16,154,163$ 16,968,333$ 137,361,675$ Operational Expenses
Salaries and Benefits 1,954,090$ 2,100,647$ 2,258,195$ 2,427,560$ 2,609,627$ 2,805,349$ 3,015,750$ 3,241,931$ 3,485,076$ 3,746,457$ 4,027,441$ Supplies and Materials 241,000$ 259,075$ 278,506$ 299,394$ 321,848$ 345,987$ 371,936$ 399,831$ 429,818$ 462,055$ 496,709$ Outside Services 388,000$ 417,100$ 448,383$ 482,011$ 518,162$ 557,024$ 598,801$ 643,711$ 691,989$ 743,889$ 799,680$ Other Charges 397,500$ 427,313$ 459,361$ 493,813$ 530,849$ 570,663$ 613,462$ 659,472$ 708,932$ 762,102$ 819,260$ NPDES Allocation 536,920$ 577,189$ 620,478$ 667,014$ 717,040$ 770,818$ 828,629$ 890,777$ 957,585$ 1,029,404$ 1,106,609$ Total Operational Expenses 3,517,510$ 3,781,323$ 4,064,922$ 4,369,792$ 4,697,526$ 5,049,841$ 5,428,579$ 5,835,722$ 6,273,401$ 6,743,906$ 7,249,699$ 53,494,711$ Net Operating Income before Debt Service 443,008$ 7,119,185$ 7,384,972$ 7,657,177$ 7,935,602$ 8,219,997$ 8,510,059$ 8,805,423$ 9,105,658$ 9,410,257$ 9,718,634$ 83,866,964$ Debt Service
Current Debt Service 856,080$ 865,385$ 863,002$ 859,384$ 863,658$ 862,054$ 864,951$ 861,608$ 862,093$ 856,582$ 860,170$ 8,618,887$ First Issuance -$ -$ 3,060,670$ 3,060,670$ 3,060,670$ 3,060,670$ 3,060,670$ 3,060,670$ 3,060,670$ 3,060,670$ Second Issuance -$ -$ -$ -$ - $ 1,034,968$ 1,034,968$ 1,034,968$ 1,034,968$ 1,034,968$ Third Issuance -$ -$ -$ -$ - $ -$ -$ -$ 1,685,483$ 1,685,483$ Total Debt Service 856,080$ 865,385$ 863,002$ 3,920,054$ 3,924,328$ 3,922,724$ 4,960,590$ 4,957,246$ 4,957,731$ 6,637,703$ 6,641,291$ Debt Service Ratio (1.25 Minimum) 0.52 8.23 8.56 1.95 2.02 2.10 1.72 1.78 1.84 1.42 1.46 Net Operating Income After Debt Service (413,072)$ 6,253,800$ 6,521,970$ 3,737,123$ 4,011,274$ 4,297,273$ 3,549,470$ 3,848,177$ 4,147,927$ 2,772,554$ 3,077,343$ 42,216,910$ .

1. The current monthly rate per EDU of $5.45 is insufficient to meet operating expenses and debt service requirements. A monthly rate of $9.54 per EDU would be required to breakeven.

5.00% 5.00% 5.00%
30 30 30

3.50% 3.50% 3.50%

0.00% 0.00% 0.00%

BOND PREMIUM

RESERVE FUND

BOND AMOUNT

ANNUAL PAYMENT

ISSUANCE IN STUDY YEAR ISSUANCE IN STUDY YEAR

BOND TERM (YEARS)
COST OF ISSUANCE (%)

BOND PREMIUM

RESERVE FUND

BOND AMOUNT

ANNUAL PAYMENT
City of Salinas - Sewer Rates/Max Bonding Capacity with minimum 125% coverage (30% PayGo with 70% Bonds) Fiscal Years 2025-2026 through 2034-2035

AVERAGE COUPON

SECOND ISSUANCE

AVERAGE COUPON

THIRD ISSUANCE

AVERAGE COUPON
Totals
Totals
Years 1-10
CIP Allocation

ISSUANCE IN STUDY YEAR

FIRST ISSUANCE

BOND TERM (YEARS)
COST OF ISSUANCE (%)

BOND PREMIUM

RESERVE FUND

BOND AMOUNT

ANNUAL PAYMENT

BOND TERM (YEARS)
City of Salinas – Sanitary Sewer System Photographs

Images1 & 2. Clogged Pipe

Image 3. Detached Pipe at Lift Station

Image 4. Joint Offset

Image 5. Broken Pipe

Image 6. Grease & Fat Buildup in Pipe Image 7. Sewer Main Repair

Image 8. Sewer Bypass for Sewer Main Replacement

Attachment 9
2020A Wastewater Revenue Refunding Bonds Schedule
Principal Interest Principal Bal
14,425,000.00
2/1/2021 31,991.37 14,425,000.00
8/1/2021 555,000.00 151,537.98 13,870,000.00 2/1/2022 150,724.90 13,870,000.00
8/1/2022 560,000.00 150,724.90 13,310,000.00 2/1/2023 149,568.50 13,310,000.00
8/1/2023 565,000.00 149,568.50 12,745,000.00 2/1/2024 147,963.90 12,745,000.00
8/1/2024 565,000.00 147,963.90 12,180,000.00 2/1/2025 145,540.05 12,180,000.00
8/1/2025 565,000.00 145,540.05 11,615,000.00 2/1/2026 142,692.45 11,615,000.00
8/1/2026 580,000.00 142,692.45 11,035,000.00 2/1/2027 139,000.75 11,035,000.00
8/1/2027 585,000.00 139,000.75 10,450,000.00 2/1/2028 134,692.23 10,450,000.00
8/1/2028 590,000.00 134,692.23 9,860,000.00 2/1/2029 129,329.13 9,860,000.00
8/1/2029 605,000.00 129,329.13 9,255,000.00 2/1/2030 123,527.18 9,255,000.00
8/1/2030 615,000.00 123,527.18 8,640,000.00 2/1/2031 117,475.58 8,640,000.00
8/1/2031 630,000.00 117,475.58 8,010,000.00 2/1/2032 110,803.88 8,010,000.00
8/1/2032 640,000.00 110,803.88 7,370,000.00 2/1/2033 103,546.28 7,370,000.00
8/1/2033 655, 000.00 103,546.28 6,715,000.00 2/1/2034 95,791.08 6,715,000.00
8/1/2034 665,000.00 95,791.08 6,050,000.00 2/1/2035 87,584.98 6,050,000.00
8/1/2035 685,000.00 87,584.98 5,365,000.00 2/1/2036 78,892.33 5,365,000.00
8/1/2036 700,000.00 78,892.33 4,665,000.00 2/1/2037 68,598.83 4,665,000.00
8/1/2037 725,000.00 68,598.83 3,940,000.00 2/1/2038 57,937.70 3,940,000.00
8/1/2038 745,000.00 57,937.70 3,195,000.00 2/1/2039 46,982.48 3,195,000.00
8/
1/2039 765,000.00 46,982.48 2,430,000.00 2/1/2040 35,733.15 2,430,000.00
8/1/2040 785,000.00 35,733.15 1,645,000.00 2/1/2041 24,189.73 1,645,000.00
8/1/2041 810,000.00 24,189.73 835,000.00 2/1/2042 12,278.68 835,000.00
8/1/2042 835,000.00 12,278.68 - 14,425,000.00 4,389,236.93
2020A REFUNDING TOTAL
City of Salinas
Legislation Text
200 Lincoln Ave., Salinas,
CA 93901
www.cityofsalinas.org
File #: ID#25-045, Version: 1
Adoption of the Stormwater Master Plan (SWMP) Update
Approve a Resolution adopting the Salinas Stormwater Master Plan Update and related Appendices.

City of Salinas Printed on 3/6/2025Page 1 of 1
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CITY OF SALINAS

COUNCIL STAFF REPORT

DATE: MARCH 11, 2025
DEPARTMENT: PUBLIC WORKS
FROM: DAVID JACOBS, DIRECTOR
BY: HEIDI NIGGEMEYER, NPDES PROGRAM MANAGER
TITLE: ADOPTION OF THE STORM WATER MASTER PLAN (SWMP)
UPDATE

RECOMMENDED MOTION:

A motion to approve a resolution adopting the Salinas Stormwater Master Plan Update and related Appendices.

EXECUTIVE SUMMARY:

The Salinas Stormwater Master Plan Update presents the findings from the development of a hydrology and hydraulics model to create a Stormwater Capital Improvement Program (CIP). This program will assist the City in prioritizing both existing and future st ormwater system needs through repair, rehabilitation, replacement, or new stormwater facilities.

BACKGROUND:

The City of Salinas owns and operates a municipal separate storm sewer system (MS4) that collects and conveys stormwater runoff throughout the City. The City periodically conducts studies to plan for current and future stormwater drainage needs. The approval of the Economic Development Element and other proposed developments (like the Future Growth Area Specific Plans) require the Stormwater Master Plan (SWMP) be updated to determine how and whether the storm drainage system can accommodate these changes. Additionally, the updated SWMP would identify potential infrastructure projects that need to be implemented to reduce flooding and accommodate increased development ; these project costs can be incorporated into the development of a new stormwater utility fee as they affect the overall cost of the stormwater program.

In December 2021, the City authorized a profess ional services agreement with Wallace Group to perform the Salinas Stormwater Master Plan update (Resolution No. 22269). This report presents an overview of the findings from the SWMP update which is a comprehensive update to the City’s 2004 SWMP.

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The City’s current stormwater system conveys stormwater via over 145 miles of pipes, culverts, and channels to local receiving waters that ultimately flow to the Monterey Bay. Major receiving waters include the Reclamation Ditch, Gabilan Creek, Natividad C reek, Santa Rita Creek, Alisal Creeks, and the Salinas River, which are all 303(d) listed1 (impaired waterbodies). The preparation of the SWMP update included document review and data collection, field survey of 1,150 storm drain manholes and 55 storm drain outfalls, comprehensive hydrology asse ssment including rainfall projections for potential climate change conditions , development of a hydraulic stormwater model to identify system deficiencies for existing and future build-out conditions, and development of a Stormwater Capital Improvement Program (CIP).

Stormwater Capital Improvement Program

The Stormwater Capital Improvement Program is separated into recommended existing and future projects. The existing projects are based o n system hydraulic deficiencies, operation and maintenance repairs identified by City staff, and focused studies to address more complex flooding issues. These 63 projects range from $1 million to $29 million and include 27 projects identified as necessary to address hydraulic deficiencies, 25 operation and maintenance repair projects, five (5) focused studies, and six (6) projects to improve stormwater collection basins. These projects address known flooding and maintenance issues in 92 locations throughout the City, as identified by City staff. Projects are ranked based on flooding frequency, flooding severity, climate resiliency, and public safety considerations such as flood impacts to critical facilities, evacuation routes, or freeways and other major roadways.

Future stormwater projects were identified based on potential impact of future developments per the City’s General Plan. Twenty-six (26) projects were identified to address hydraulic deficiencies resulting from future development and potential climate impacts. The timing of these future projects is dependent on when future developments connect to the City’s storm drain system.

These improvements are recommended to be completed prior to or as part of a development project that comes online. In addition, future maintenance projects were identified based on pipes that currently have limited or marginally deficient hydraulic capacity. These pipes are recommended to be upsized with larger diameter pipes when that are slated for replacement due to age and material deficiencies (i.e. when they have reached very high probability of failure). A total of 127 future maintenance projects were identified for hydraulic upgrades. Total potential cost for future projects exceeds $1 billion.

Mapping and GIS Integration
Data collected through field surveys and developed through the hydraulic model under the SWMP update has been incorporated into the Cit y’s GIS -based stormwater information management system, 2NForm, for asset management. Through this GIS integration the SWMP update will support the City’s ongoing stormwater permit compliance activities.

1 303(d) listed refers to a listing by the State Water Resources Control Board identifying a water body as impaired based on the California Clean Water Act Section 303(d). The State and Regional Water Boards assess water quality data for California’s waters every two years to determine if they contain pollutants at levels that exceed water quality criteria and standards.

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One Water Roadmap
In a separate but related project the City has entered a contract with Carollo to develop a one water plan for the City. The objective of the plan is to improve water reliability and identify sustainable ways to manage the wat er resources that are available. Carollo will work with City staff to brainstorm and develop an initial list of current and potential new projects or programs that help address the City's water management challenges, such as growth, industrial wastewater treatment plant expansion, and stormwater reuse. A trigger-based roadmap will consist of a visual that lists the project opportunities, including key triggers, such growth (demands or flows), new regulations, and/or inter-agency agreements.

CEQA CONSIDERATION:

The City of Salinas has determined that the proposed action is not a project as defined by the California Environmental Quality Act (CEQA) Guidelines Section 15378.

CALIFORNIA GOVERNMENT CODE §84308 APPLIES:

STRATEGIC PLAN INITIATIVE:

The proposed project and agreement meet the City Council’s Strategic Plan Initiative s of Investment Strategies/Risk Management and Operational Efficiencies.

DEPARTMENTAL COORDINATION:

Preparation of the SWMP update has relied on coordination between the Stormwater (NPDES), Development Engineering, GIS, and Wastewater/Environmental Maintenance Divisions in Public Works. The NPDES Division has coordinated the overall execution of the SWMP update, with GIS supporting database updates and Wastewater/Maintenance Services providing valuable input to the SWMP update from an operations perspective.

FISCAL AND SUSTAINABILITY IMPACT:

Fund

Appropriation

Appropriation
Name
Total
Appropriation
Amount for
recommendation
FY 24-25
Operating
Budget Page
Last Budget
Action (Date,
Resolution)

N/A N/A N/A N/A N/A N/A N/A

There is no direct fiscal impact associated with adopting this report. Through prior Council adoption, funds were appropriated and expended for the preparation of the SWMP update.

Implementation of the recommended capital improvement projects listed in the SWMP update , which address existing deficiencies, total $321 million. Of this total, $12 million are high priority projects recommended and should be completed as soon as funding is available. The current capital reserves available in CIP 9735 – Storm Sewer Infrastructure Improvements total approximately $1.4 million, which is insufficient to cover projects of this magnitude.

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ATTACHMENTS:

Resolution
Final Draft - Salinas Stormwater Master Plan Update
Appendices - Salinas Stormwater Master Plan Update
Salinas SWMP Update Presentation
RESOLUTION NO. (N.C.S.)

A RESOLUTION ADOPTING THE SALINAS STORMWATER MASTER PLAN UPDATE WHEREAS, the City of Salinas owns and operates a municipal separate storm sewer system (MS4) for the residents and businesses within its service area and periodically conducts studies to plan for current and future stormwater infrastructure needs; and

WHEREAS, on December 14, 2021, the City authorized an agreement with Wallace Group to perform the Stormwater Master Plan (SWMP) Update (Resolution No. 22269); and

WHEREAS, the SWMP Update will serve to assist the City in prioritizing both existing and future stormwater system needs through repair, rehabilitation, replacement, or implementation of new facilities; and

WHEREAS, the City of Salinas has determin ed the S WMP Update is not a project as defined by the California Environmental Quality Act (CEQA) (CEQA Guidelines Section 15378).

NOW, THEREFORE, BE IT RESOLVED BY THE COUNCIL OF THE CITY OF SALINAS, that the Salinas Stormwater Master Plan Update and related appendices attached hereto are hereby adopted.

PASSED AND APPROVED this 11th day of March 2025, by the following vote:

AYES:

NOES:

ABSENT:

ABSTAIN:

APPROVED:

Dennis Donohue, Mayor
ATTEST:

Patricia M. Barajas, City Clerk
C i t y o f S a l i n a s
S t o r m w a t e r
M a s t e r P l a n U p d a t e
O c t o b e r , 2 0 2 4

C E R T I F I C A T I O N

In accordance with the provisions of Section 6735 of the Business and Professions Code of the State of California, this report was prepared by or under the direction of the following Civil Engineer, licensed in the State of California:

ENGINEER IN RESPONSIBLE CHARGE:

__________________________________________________ ______ Kari Wagner, PE C66026 Date
Expiration: 6/30/2026
__________________________________________________ ______ 10/01/2024
Salinas Stormwater Master Plan Update October 2024
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T A B L E O F C O N T E N T S

E X E C U T I V E S U M M A R Y ....................................................................................................................................... ES-1 INTRODUCTION ................................................................................................................................................................... ES-1 STORM DRAIN MODELING AND ANALYSIS .......................................................................................................................... ES-2 DETENTION BASIN EVALUATION ......................................................................................................................................... ES-2 CAPITAL IMPROVEMENT PROGRAM ................................................................................................................................... ES-3 CAPITAL IMPROVEMENT COSTS .......................................................................................................................................... ES-3 CIP RANKING........................................................................................................................................................................ ES-3 C H A P T E R 1 I N T R O D U C T I O N ............................................................................................................................. 1-1 PURPOSE ............................................................................................................................................................................... 1-1 PREVIOUS MASTER PLAN AND REFERENCED STUDIES ........................................................................................................... 1-1 ENVIRONMENTAL REVIEW .................................................................................................................................................... 1-1 AUTHORIZATION AND SCOPE OF WORK ................................................................................................................................ 1-2 Task 1. Document Review and Data Collection ................................................................................................................. 1-2 Task 2. Field Effort & GIS Update ....................................................................................................................................... 1-2 Task 3. Develop a Storm Drain Model ............................................................................................................................... 1-2 Task 4. Develop Capital Improvement Program ................................................................................................................ 1-2 Task 5. Draft and Final Stormwater Master Plan Update .................................................................................................. 1-3 ACKNOWLEDGEMENTS ......................................................................................................................................................... 1-3 C H A P T E R 2 S T U D Y A R E A C H A R A C T E R I S T I C S .......................................................................................... 2-1 INTRODUCTION ..................................................................................................................................................................... 2-1 STUDY AREA .......................................................................................................................................................................... 2-1 Regional Watershed .......................................................................................................................................................... 2-1 Receiving Waters Characterization.................................................................................................................................... 2-1 Study Boundary .................................................................................................................................................................. 2-2 Topography ........................................................................................................................................................................ 2-2 Climate….. .......................................................................................................................................................................... 2-2 Land Use.. .......................................................................................................................................................................... 2-3 Future Land Use ................................................................................................................................................................. 2-3 Soils………............................................................................................................................................................................ 2-4 C H A P T E R 3 S T O R M D R A I N S Y S T E M O V E R V I E W .................................................................................... 3-1 DATA SOURCES ...................................................................................................................................................................... 3-1 STORM DRAIN SYSTEM OVERVIEW ....................................................................................................................................... 3-1 Storm Drain Mapping ........................................................................................................................................................ 3-1 Storm Drain Pipes .............................................................................................................................................................. 3-1 Storm Drain Manholes ....................................................................................................................................................... 3-2 Storm Drain Inlets .............................................................................................................................................................. 3-2 Lift Stations ........................................................................................................................................................................ 3-3 Detention and Retention Basins ........................................................................................................................................ 3-3 Reclamation Ditch.............................................................................................................................................................. 3-4 HIGH PRIORITY AREAS ........................................................................................................................................................... 3-4 C H A P T E R 4 H Y D R O L O G I C A N A L Y S I S M E T H O D O L O G I E S .................................................................... 4-1 INTRODUCTION ..................................................................................................................................................................... 4-1 HYDROLOGY ANALYSIS CRITERIA ........................................................................................................................................... 4-1 Design Storm (Flood Protection Levels) ............................................................................................................................. 4-1 Runoff Model ..................................................................................................................................................................... 4-2 Salinas Stormwater Master Plan Update October 2024
Page ii
Infiltration Model ............................................................................................................................................................... 4-2 HYDROLOGY MODEL DATA .................................................................................................................................................... 4-3 Catchment Areas ............................................................................................................................................................... 4-3 Percent Impervious ............................................................................................................................................................ 4-3 Catchment Surface Roughness .......................................................................................................................................... 4-5 Depression Storage ............................................................................................................................................................ 4-5 2NDNATURE CLIMATE CHANGE ANALYSIS ............................................................................................................................ 4-5 Climate Resiliency .............................................................................................................................................................. 4-5 Results of Climate Change Analysis ................................................................................................................................... 4-5 C H A P T E R 5 H Y D R A U L I C A N A L Y S I S M E T H O D O L O G I E S ........................................................................ 5-1 INTRODUCTION ..................................................................................................................................................................... 5-1 HYDRAULIC ANALYSIS CRITERIA ............................................................................................................................................ 5-1 Allowable Velocities ........................................................................................................................................................... 5-1 Minimum Pipe Sizes ........................................................................................................................................................... 5-1 Surcharging ........................................................................................................................................................................ 5-2 Pipe Flow Model ................................................................................................................................................................ 5-2 Pipe Routing Model ........................................................................................................................................................... 5-2 HYDRAULICS MODEL DATA .................................................................................................................................................... 5-2 Pipe Geometry ................................................................................................................................................................... 5-2 Friction Factors .................................................................................................................................................................. 5-2 Outfall Boundary Conditions .............................................................................................................................................. 5-3 Retention and Detention Basins ........................................................................................................................................ 5-3 Flow Allocation .................................................................................................................................................................. 5-3 C H A P T E R 6 S T O R M D R A I N S Y S T E M A N A L Y S I S ...................................................................................... 6-1 INTRODUCTION ..................................................................................................................................................................... 6-1 STORM DRAIN SYSTEM ANALYSIS CRITERIA .......................................................................................................................... 6-1 STORM DRAIN MODEL ........................................................................................................................................................... 6-1 Storm Drain Model Extents ................................................................................................................................................ 6-1 Storm Drain Network Assumptions.................................................................................................................................... 6-1 STORM DRAIN MODEL RESULTS - EXISTING CONDITIONS ..................................................................................................... 6-2 Deficient Pipe Velocity ....................................................................................................................................................... 6-2 Deficient System Capacity.................................................................................................................................................. 6-2 STORM DRAIN MODEL RESULTS - FUTURE CONDITIONS ....................................................................................................... 6-2 SUMP CONDITIONS ............................................................................................................................................................... 6-2 C H A P T E R 7 C A P I T A L I M P R O V E M E N T P R O G R A M................................................................................... 7-1 BASIS OF CAPITAL IMPROVEMENT PROGRAM COSTS ........................................................................................................... 7-1 Storm Drain Upgrade Unit Costs ........................................................................................................................................ 7-1 CIP RANKING.......................................................................................................................................................................... 7-4 Comparison with Identified Problem Areas ....................................................................................................................... 7-4 TIMING OF RECOMMENDED IMPROVEMENTS...................................................................................................................... 7-4 POTENTIAL STRATEGIC GREEN INFRASTRUCTURE ................................................................................................................. 7-5 FUNDING ............................................................................................................................................................................... 7-5 Grant Funding .................................................................................................................................................................... 7-5

Salinas Stormwater Master Plan Update October 2024
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A P P E N D I C E S .............................................................................................................................................................. 7-1 APPENDIX A: HIGH PRIORITY PROJECT CUTSHEETS ......................................................................................................................... 7-2 APPENDIX B: AREAS OF CONCERN SUMMARY SPREADSHEET FROM CITY OF SALINAS ............................................................................ 7-3 APPENDIX C: MODEL REFERENCE DATA ....................................................................................................................................... 7-4 APPENDIX D: MAINTENANCE PRIORITY PROJECTS .......................................................................................................................... 7-6 APPENDIX E: STORM DRAIN MODEL RESULTS EXHIBITS - EXISTING CONDITIONS .................................................................................. 7-8 APPENDIX F: STORM DRAIN MODEL RESULTS EXHIBITS - FUTURE CONDITIONS ................................................................................... 7-9 APPENDIX G: DETAILED STORM DRAIN MODEL RESULTS – EXISTING CONDITIONS (UNDER SEPARATE COVER) ........................................ 7-10 APPENDIX H: DETAILED STORM DRAIN MODEL RESULTS – FUTURE CONDITIONS (UNDER SEPARATE COVER) .......................................... 7-11

Salinas Stormwater Master Plan Update October 2024
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L I S T O F T A B L E S

TABLE ES-1. HYDRAULIC AND HYDROLOGIC CRITERIA FOR EXISTING SYSTEMS ...................................................... ES-2 TABLE ES-2. STORM DRAIN CIP RANKING MATRIX .................................................................................................. ES-4 TABLE ES-3. CITY OF SALINAS HIGH PRIORITY STORM DRAIN CAPITAL IMPROVEMENT PROGRAM (CIP) .............. ES-5 TABLE 2-1 CITY EXISTING LAND USE .......................................................................................................................... 2-3 TABLE 2-2. CLASSIFICATION OF HYDROLOGIC SOIL GROUPS ..................................................................................... 2-5 TABLE 3-1. STORM DRAIN SYSTEM PIPE INVENTORY BY DIAMETER ......................................................................... 3-2 TABLE 4-1. HYDROLOGIC CRITERIA FOR EXISTING SYSTEMS ..................................................................................... 4-1 TABLE 4-2. NOAA ATLAS 14 24-HOUR DESIGN STORM PRECIPITATION DEPTH ........................................................ 4-2 TABLE 4-3. INFILTRATION RATES ............................................................................................................................... 4-3 TABLE 4-4. PERCENT IMPERVIOUS ............................................................................................................................. 4-4 TABLE 4-5. CLIMATE CHANGE 24-HOUR DESIGN STORM PRECIPITATION DEPTHS ................................................... 4-6 TABLE 5-1. HYDRAULIC CRITERIA FOR EXISTING SYSTEMS ........................................................................................ 5-1 TABLE 5-2. ROUGHNESS COEFFICIENTS ..................................................................................................................... 5-2 TABLE 6-1. SUMP CONDITION LOCATIONS ................................................................................................................ 6-3 TABLE 7-1. STORM DRAIN MAIN CONSTRUCTION UPGRADE UNIT COSTS ................................................................ 7-2 TABLE 7-2. DEEP STORM DRAIN MAIN CONSTRUCTION UPGRADE UNIT COSTS ...................................................... 7-3 TABLE 7-3. STORM DRAIN RANKING CIP MATRIX ...................................................................................................... 7-6 TABLE 7-4. HIGH PRIORITY STORM DRAIN CIP LIST ................................................................................................... 7-7

Salinas Stormwater Master Plan Update October 2024
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L I S T O F F I G U R ES

FIGURE 2-1: SALINAS RECEIVING WATERS ................................................................................................................. 2-6 FIGURE 2-2: STORMWATER MASTER PLAN STUDY AREA .......................................................................................... 2-7 FIGURE 2-3: EXISTING LAND USE ............................................................................................................................... 2-8 FIGURE 2-4: FUTURE LAND USE ................................................................................................................................. 2-9 FIGURE 2-5: HYDROLOGIC SOIL GROUPS ................................................................................................................. 2-10 FIGURE 3-1: STORM DRAIN SYSTEM OVERVIEW ....................................................................................................... 3-6 FIGURE 3-2: CITY’S STORMWATER AREAS OF CONCERN ........................................................................................... 3-7 FIGURE 4-1: CATCHMENT AREAS ............................................................................................................................... 4-7 FIGURE 5-1: MODELED STORM DRAIN SYSTEM ......................................................................................................... 5-4 FIGURE 6-1: STORM DRAIN MODEL ........................................................................................................................... 6-5 FIGURE 7-1: CIP MAP ................................................................................................................................................. 7-8

Salinas Stormwater Master Plan Update October 2024
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L I S T O F A C R O N Y M S

AF Acre-Feet
CASP Central Area Specific Plan
CEQA California Environmental Quality Act
cfs Cubic feet per second
CIP Capital Improvements Project
City City of Salinas
cm Centimeter
County Monterey County
DAC Disadvantaged Community
EDE Economic Development Element
E.I.T. Engineer in Training
EIR Environmental Impact Report
ENR Engineering News Record
ESRI Environmental Systems Research Institute
EPA Environmental Protection Agency
FEMA Federal Emergency Management Agency
FGA Future Growth Area
FIS Flood Insurance Study
fps Feet per Second
ft Feet
GCM Global Climate Change Model
GIS Geographic Information System
HSG Hydrologic Soil Group
InfoSWMM Info Stormwater Management Model- Innovyze InfoSWMM Version 15.1 LID Low Impact Development
MCWRA Monterey County Water Resources Agency
MS4 Municipal Separate Storm Sewer System
NAD North American Datum
NAVD North American Vertical Datum
ND Negative Declaration
NRCS Natural Resources Conservation Service
P.E. Professional Engineer
PFDS
RMSE
Precipitation Frequency Data Server
Root-Mean-Square-Deviation
SDMH Storm Drain Manhole
SWDS Stormwater Development Standards
SWMM Stormwater Management Model
SWMPU Stormwater Master Plan Update
WWTP Wastewater Treatment Plant
USGS United States Geological Survey
WASP West Area Specific Plan
Salinas Stormwater Master Plan Update October 2024
ES-1

E X ECU T IV E SU M M ARY

This report represents the Stormwater Master Plan Update (SWMPU) for the City of Salinas (City). The City is the largest city in Monterey County and serves as the County seat. The City has a long heritage as the financial and industrial center of Monterey County. US Route 101 bisects the City, while California State Route 68 heads west to Monterey and California State Route 183 runs northwest to Castroville. The City owns and operates a municipal separate storm sewer system (MS4) that conveys stormwater run off to the major receiving waters, which ultimately flow to Monterey Bay.

I N T R O D U C T I O N
In December 2021, the City of Salinas authorized Wallace Group to complete a comprehensive Stormwater Master Plan Update to evaluate the City’s storm drainage system. Preparation of the S WMPU will assist the City in prioritizing both existing and future stormwater collection system needs through repair, rehabilitation, replacement, and new facility installation. The master planning process will also tie the stormwater capacity assessment, both existing and future, to the infrastructure budgeting process.

The SWMPU includes analyses of the City’s collection system capacity, impact of future developments and land use changes, and a prioritized capital improvement program.

This SWMPU is presented in seven chapters, summarized as follows:

❖ Chapter 1: Introduction. This chapter presents an overview of the goals of this report, authorization and scope of work, and acknowledgement of the various staff and personnel involved in the preparation of this document.

❖ Chapter 2: Study Area Characteristics. This chapter focuses on important characteristics of the study area.

Key parameters established in this chapter include existing and future land uses, topography, climate, and hydrologic soil groups in the City. Land surface conditions in the City are esse ntial for evaluating stormwater runoff.

❖ Chapter 3: Storm Drain System Overview. This chapter provides an overview of the City’s MS4 system and the sources of MS4 information used. The Salinas MS4 system consists of approximately 140 miles of pipe, with diameters ranging from 4-inch to 84-inch.

❖ Chapter 4: Hydrologic Analysis Methodologies. This chapter describes hydrologic parameters that were used to develop the storm drain model as well as standard criteria developed by the City for identifying system deficiencies. Also discussed is 2NDNATURE’s evaluation of climate change impacts to frequency and intensity of rainfall events.

❖ Chapter 5: Hydraulic Analysis Methodologies . This chapter describes hydraulic parameters that were used to develop the storm drain model as well as standard criteria developed by the City for identifying system deficiencies.

❖ Chapter 6: Storm Drain System Analysis. This chapter presents the modeling and hydraulic analysis of the City’s storm drain system. The City’s trunk storm drain system was modeled, which consists of mainline storm drains 24 -inches and larger, the City’s detention basins, and outfalls. The hydrau lic model was utilized to analyze both existing and future flow conditions.

Salinas Stormwater Master Plan Update October 2024
ES-2

❖ Chapter 7: Capital Improvement Program. This chapter presents the capital improvement program (CIP), which identifies recommended existing and future storm drain system improvements, including capital costs. This CIP will be used by the City as a strategic planning tool to plan for and forecast needed capital budgets for anticipated storm drain system improvements.

S T O R M D R A I N M O D E L I N G A N D A N A L Y S I S The City’s MS4 system consists of approximately 140 miles of pipe, with diameters ranging from 4-inch to 84- inch. The main trunk storm drain system was analyzed using the Innovyze InfoSWMM Version 15.1 hydraulic modeling program to evaluate performance under both existing and future flow conditions.

Design criteria, as shown in Table ES-1, were applied in the analysis of the trunk storm drain model. Hydrologic and hydraulic criteria are sourced from the City’s 2013 Stormwater Development Standards (SWDS) and the August 2021 Final Draft SWDS.

T A B L E ES - 1 . H Y D R A U L I C A N D H Y D R O L O G I C C R I T E R I A F O R

E X I S T I N G S Y S T E M S

S T A N D A R D C R I T E R I A

V E L O C I T Y
Minimum: 2.0 fps when full
Maximum: 8.0 fps

F R I C T I O N F A C T O R
M A N N I N G ’ S N
See TABLE 5-2

M I N I M U M P I P E S I Z E
15-inch for mainline
12-inch for catch basin laterals

S U R C H A R G I N G
Acceptable with a minimum freeboard of 1-foot below
ground level

R E T U R N I N T E R V A L
20-year for commercial/industrial areas and main trunk
5-year for residential and local drainage facilities

R A I N F A L L P A T T E R N
24-hour: NRCS Type I
6-hour: From 2013 SWDS

Pipes were considered deficient if they had less than the minimum 1-foot freeboard during the associated design storm. Storm drain lines that do not meet the velocity criteria in the model were identified, but improvement projects were not recommended based on this criterion alone.

D E T E N T I O N B A S I N E V A L U A T I O N
The 2013 SWDS sets requirements for the design of detention basins. Stormwater detention or retention is required for all new development and redevelopment projects to mitigate increases in stormwater discharges. Storage is to be determined using a 24-hour duration design storm, a discharge rate that does not exceed the available downstream capacity, and i n conformance with the Monterey County criteria.

Basin performance was evaluated using the InfoSWMM model. Per the 2013 SWDS, basins are required to maintain a minimum of 2-feet of freeboard during the 100 -year storm event. Basins were considered deficient if they have less than this minimum freeboard.

Salinas Stormwater Master Plan Update October 2024
ES-3

C A P I T A L I M P R O V E M E N T P R O G R A M
Capital improvement projects were identified based on model results and input from the City on known areas of concern. Recommended improvements include replacing undersized inlets, new infrastructure to abandon existing storm drain siphons, upsizing pipes, sediment removal, modifications to existing basins, and focused studies to evaluate specific areas for the potential for new regional facilities.

C A P I T A L I M P R O V E M E N T C O S T S
The CIP costs were developed based on engineering judgment, confirmed bid prices for similar work in Monterey County, consultation with vendors and contractors, established budgetary unit prices for the work, and other reliable sources. Hard construction costs are typically escalated by a factor of 1.4 (1.8 for smaller projects) to allow budget for “soft costs” that include preliminary engineering, engineering, administration, construction management and inspection costs. All CIP costs are expressed in Year 202 4 dollars, using the McGraw -Hill Engineering News Record (ENR) Construction Cost Index of 13632 (September 2024). Actual project costs will vary depending on economic conditions at the time of construction and should be escalated to the year or years scheduled for the work. The unit cost for new storm drain pipelines includes the proposed pipelines, manholes, lateral re-connections, sewer bypassing, traffic control, etc., and all other aspects of sewer system construction.

C I P R A N K I N G
The capital improvement projects were ranked to determine the priority the recommended projects should be constructed. Table ES-2 evaluates each of the projects in four categories: flooding frequency, flooding severity, impact from climate change, and public safety. These categories are all weighted equally with a scale of 1 to 5 as they are critical aspects to the functionality of the storm drain system. The rankings for the individual categories were then added together to determine its final score. Note that there are some projects labelled “Study” with lower overall ranking scores which were manually categorized as high priority. These projects require further evaluation with specific studies to understand their needs and intricacies.

High priority projects (denoted by project number beginning with a “1”) should be undertaken first, as these are critical to the operation and function of the City’s storm drain system and then followed by medium (“2”) and low (“3") priority projects as funding permit. Table ES-3 goes into detail on the high priority projects providing a brief description of the necessary upgrades and their locations as well as a breakdown of costs.

It is recommended that the City review these projects periodically to determine if any substantial changes have occurred that may re -prioritize a project to a higher ranking. The future capital improvement projects were not ranked as high, medium, or low priority since they are determined by timing of construction of the future development.

TABLE ES-2.

CITY OF SALINAS SWMPU

STORM DRAIN CIP RANKING MATRIX
Flooding Frequency Flooding Severity Climate Change Public Safety Area of Concern = 5
5-yr and 10-yr storm = 3
20-yr storm = 1
Widespread flooding = 5
Localized flooding = 3
Minimal flooding = 1
Climate Change Impact = 5
No Climate Change Impact = 0
Critical Facility or Evac Route = 5
Major Arterial or Freeway = 5
Minor Arterial or Collector = 3
Local or Private = 1
John St & Monterey St Replace undersized inlets 5 5 5 5 20 YES $960,000 1-1 Nativdad Creek E Laurel Crossing New permanent fencing or barricades 5 5 5 5 20 YES $360,000 1-2 E Romie Ln & S Main St Replace undersized inlets 5 5 5 5 20 NO $1,590,000 1-3 Madrid Entrance to Northridge Mall Nearest to Big 5 Replace undersized inlets 5 5 5 5 20 YES $710,000 1-4 Williams and Freedom Parkway Silt Basin Construct larger basin (property acquisition) 5 5 5 5 20 NO $100,000 1-5 Monte Bella Basin Remove sediment from existing basin and lower outlet invert 5 5 5 5 20 YES $510,000 1-6 Monterey St & E Gabilan St Replace undersized inlets 5 5 5 5 20 YES $720,000 1-7 Northgate Park New detention storage at existing park 5 5 5 5 20 YES $490,000 1-8 Salinas Fairways Golf Course Study to evaluate feasibility of relief flow to golf course 5 5 5 5 20 YES $100,000 1-9 1198 Tyler St Replace existing siphons 5 5 5 5 20 YES $1,500,000 1-10 E Boronda and Williams Corner Improve ditch and construct new basin (property acquisition) 5 5 5 5 20 NO $100,000 1-11 Natividad Rd from E Alvin to E Laurel New inlets, stabilize ROW with vegetation 5 5 5 5 20 NO $1,260,000 1-12 Blanco Basin Study to evaluate necessary maintenance and inlet repairs 5 5 5 5 20 YES $100,000 1-13 Cesar Chavez Basin Perform Basin Improvements per Preliminary Design Report 5 5 5 5 20 YES $2,010,000 1-14 Salinas River Pump Station and Outfall Condition Assessment of the Salinas River Pump Station and associated outfall pipe to understand the need for and level of rehabilitation necessary 5 3 5 5 18 YES $200,000 1-15 E Boronda East of Independence Blvd Study to evaluate floodplain storage (property acquisition) 5 1 5 5 16 NO $100,000 1-16 Monte Bella Ditch Establish sediment removal program 5 1 5 5 16 YES $700,000 1-17 Santa Rita Creek - San Juan Grade and Russell Rd Study to evaluate floodplain storage (property acquisition) 5 3 5 1 14 YES $200,000 1-18 1322 Adams St Replace existing siphons 5 5 5 3 18 YES $630,000 2-1 E Alisal St Pipe Upgrades 3 5 5 5 18 NO $4,330,000 2-2
E Market St Pipe Upgrades 3 5 5 5 18 YES $7,840,000 2-3 E Blanco Rd Pipe Upgrades 3 5 5 5 18 NO $19,160,000 2-4 Maryal Dr Pipe Upgrades 3 5 5 5 18 YES $5,510,000 2-5
Russell Rd Pipe Upgrades 3 5 5 5 18 NO $3,210,000 2-6
Acosta Plz Pipe Upgrades 3 5 5 5 18 YES $8,640,000 2-7
Eucalyptus Dr Pipe Upgrades 3 5 5 5 18 YES $14,190,000 2-8 Chaparral St Pipe Upgrades 3 5 5 5 18 YES $16,520,000 2-9 Constitiution Blvd Pipe Upgrades 3 5 5 5 18 NO $7,480,000 2-10 Airport Pipe Upgrades 3 5 5 5 18 NO $14,970,000 2-11
Sherwood Dr Pipe Upgrades 3 5 5 5 18 YES $19,740,000 2-12 La Mancha Way Pipe Upgrades 3 5 5 5 18 NO $15,490,000 2-13 Rosarita Dr Pipe Upgrades 3 5 5 5 18 YES $22,530,000 2-14 W Market St Pipe Upgrades 3 5 5 5 18 YES $16,930,000 2-15 283 Chaparral St Replace existing siphons 5 5 5 3 18 YES $5,460,000 2-16 Tuscany Blvd Pipe Upgrades 3 5 5 5 18 YES $5,910,000 2-17 Iverson St & Clay St Extend storm drain, new inlets 5 5 5 3 18 NO $670,000 2-18 Lincoln Ave & Clay St Replace undersized inlets 5 5 5 3 18 YES $2,650,000 2-19 55 Santa Lucia Ave Replace undersized inlets 5 3 5 5 18 NO $670,000 2-20 North Bound Off-Ramp to W Market St. from Davis Rd Replace undersized inlets 5 3 5 5 18 YES $360,000 2-21 Salinas River Outfall Rehabilitation (relining) of 66in CMP outfall pipe along with removal of debris impacting flap gate at the Salinas River 5 3 5 5 18 YES $10,770,000 2-22 East Market St Pipe Upgrades 3 3 5 5 16 YES $3,520,000 3-1 E San Luis St & Soledad St Replace existing siphons 5 3 5 3 16 YES $1,950,000 3-2 603 Carriage Ct Replace existing siphons 5 5 5 1 16 YES $690,000 3-3 Rico St Pipe Upgrades 3 3 5 5 16 NO $4,200,000 3-4
E Laurel Dr & Noice Dr Replace undersized inlets 5 1 5 5 16 YES $1,120,000 3-5 Chaparral St & Noice Dr Replace undersized inlets 5 1 5 5 16 YES $600,000 3-6 N Davis Rd Pipe Upgrades 3 3 5 5 16 YES $6,230,000 3-7
N Main St at Harley Shop Replace undersized inlets 5 1 5 5 16 YES $630,000 3-8 Project NumberProject Location Project Description Total Score DAC Area Total Cost ($) ES-2
TABLE ES-2.

CITY OF SALINAS SWMPU

HIGH PRIORITY STORM DRAIN CAPITAL IMPROVEMENT PROGRAM (CIP) Project # Title Description Location Construction Cost
($)
Soft Cost
($)*
Total Project Cost
($)**
1-1 John St & Monterey St Replace nine undersized curb inlets

1. Intersection of S Main St and Winham St/Clay St: 4 inlets

2. Intersection of John St and Monterey St: 2 inlets

3. Intersection of John St and Soledad St: 3 inlets
$680,000 $280,000 $960,000
1-2 Natividad Creek E Laurel
Crossing
Existing culverts in Natividad Creek under East Laurel Drive are not protected, allowing for trash build-up within the culvert as well as posing a risk to public safety. Install new permanent fencing or barricades to protect these culverts
Natividad Creek, E Laurel Crossing $200,000 $160,000 $360,000 1-3 E Romie Ln & S Main St Replace eight undersized curb inlets

1. Intersection of S Main St and East Acacia St: 1 inlet

2. Intersection of S Main St and Hawthorne St: 2 inlets

3. Intersection of S Main St and East Romie Ln: 3 inlets

4. Intersection of S Main St and Katherine St: 2 inlets $1,130,000 $460,000 $1,590,000
1-4 Madrid Entrance to Northridge
Mall Nearest to Big 5 Replace three undersized curb inlets and add 300 feet of pipe Madrid St entrance to Northridge Mall nearest to Big 5: 3 inlets $390,000 $320,000 $710,000 1-5 Williams and Freedom Parkway
Silt Basin
The current silt basin is undersized. acquire additional property and construct a larger silt basin Corner of Williams Rd and Freedom Pkwy $0 $100,000 $100,000 1-6 Monte Bella Basin Remove excess sediment from basin, lower invert by approx 2 feet, and reconstruct 100 feet of downstream pipe Corner of Monte Bella Pkwy and Sconberg Pkwy $280,000 $230,000 $510,000 1-7 Monterey St & E Gabilan St Replace five undersized inlets 1. Intersection of E Monterey St and E Gabilan St: 4 inlets

2. South of intersection of W Gabilan St and Church St: 1 inlet $400,000 $320,000 $720,000 1-8 Northgate Park
Northgate Park does not act as a detention basin because it is not connected into the City's storm drain system. Connect the park to the storm drain system with a new pipe and overflow grate
Between Cherokee Dr and Sepulveda Dr $270,000 $220,000 $490,000 1-9 Salinas Fairway Golf Course Perform feasibility study to diverting stormwater to the golf course to reduce flooding along Alisal St South of E Alisal St $0 $100,000 $100,000 1-10 1198 Tyler St Replace fourteen siphons/undersized curb inlets

1. Intersection of W Laurel Dr and Tyler St: 3 inlets/siphons

2. Intersection of W Laurel Dr and Polk St: 4 inlets/siphons

3. Intersection of W Laurel Dr and Monroe St: 3 inlets/siphons

4. Intersection of W Laurel Dr and Adams St: 4 inlets/siphons $1,070,000 $430,000 $1,500,000
1-11 E Boronda and Williams Corner
Perform a study to evaluate the potential for a new sediment basin and basin/ditch configurations at this intersection to reduce flooding and heavy sedimentation
Along Williams Rd, west of corner with E Boronda Rd $0 $100,000 $100,000 *Soft costs include a 40% escalation of the construction costs for planning, engineering, CM, legal/admin for project with more than $400,000 in construction costs and a 80% escalation factor for projects with less than $400,000 in construction costs. **All CIP costs are expressed in May 2024 dollars, using McGraw-Hill ENR Construction Cost Index of 13532, and will need to be escalated to the year or years scheduled for the work.

ES-3
TABLE ES-3.

CITY OF SALINAS SWMPU

HIGH PRIORITY STORM DRAIN CAPITAL IMPROVEMENT PROGRAM (CIP) Project # Title Description Location Construction Cost
($)
Soft Cost
($)*
Total Project Cost
($)**
1-12 Natividad Rd from E Alvin to E
Laurel
Replace eight undersized curb inlets and stabilize City ROW with vegetation

1. Intersection of Natividad Rd and E Alvin Dr : 3 inlets

2. Intersection of Natividad Rd and Rainier Dr/Chaparral St: 3 inlets

3. Intersection of Natividad Rd and Pacheco St: 2 inlets

4. Intersection of Natividad Rd and E Laurel Dr: 1 inlets

5. Replace vegetation in City ROW along Natividad Rd, between E Alvin Dr to E Laurel Dr
$900,000 $360,000 $1,260,000
1-13
Blanco Basin Study to evaluate necessary maintenance and inlet repairs Blanco Basin, southwest of Blanco Rd $0 $100,000 $100,000 1-14 Cesar Chavez Basin Perform Basin Improvements per Preliminary Design Report Cesar Chavez Bain, Cesar Chavez Park $1,430,000 $580,000 $2,010,000 1-15 Salinas River Pump Station and
Outfall
Condition Assessment of the Salinas River Pump Station and associated outfall pipe to understand the need for and level of rehabilitation necessary
Salinas River Pump Station and Outfall, southwest of Blanco Rd $0 $100,000 $100,000 1-16 E Boronda East of
Independence Blvd
Perform a study to evaluate additional stormwater storage north of Boronda Rd North of E Boronda Rd, east of Independence Blvd $0 $100,000 $100,000 1-17 Monte Bella Ditch Establish a sediment removal program for Monte Bella Ditch Monte Bella Ditch, east of Sconberg Pkwy $500,000 $200,000 $700,000 1-18 Santa Rita Creek - San Juan
Grade and Russell Rd Identify opportunities to reduce surface flooding in Santa Rita Creek Santa Rita Creek, between Russell Rd and North Main St $0 $200,000 $200,000 $11.7+ million
*Soft costs include a 40% escalation of the construction costs for planning, engineering, CM, legal/admin for project with more than $400,000 in construction costs and a 80% escalation factor for projects with less than $400,000 in construction costs. **All CIP costs are expressed in May 2024 dollars, using McGraw-Hill ENR Construction Cost Index of 13532, and will need to be escalated to the year or years scheduled for the work.

HIGH PRIORITY STORM DRAIN CIP
ES-3
Salinas Stormwater Master Plan Update October 2024
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C H AP T E R 1

I N T ROD UC T IO N

This report presents the Stormwater Master Plan Update ( SWMPU) for the City of Salinas (City). The City is the largest city in Monterey County (County) and serves as the County seat. According to the 2020 Census, the City’s current population is approximately 163,550 people. This Chapter begins the SWMPU by presenting the need for the Master Plan, the references used, and the scope of work.

P U R P O S E
The preparation of this SWMPU will assist the City of Salinas in prioritizing both existing and future storm drain system needs through repair, rehabilitation, replacement, or new facilities. The last SWMP was prepared in 2004 and there have been significant changes and growth in the City since then.

P R E V I O U S M A S T E R P L A N A N D R E F E R E N C E D S T U D I E S The City and other sources provided Wallace Group with data regarding the existing storm drain system for this analysis. The following is a summary of the information Wallace Group has reviewed for the SWMPU.

❖ Existing 2004 Stormwater Master Plan
❖ Land use information developed for the May 2023 Sanitary Sewer Master Plan Update, based on the City’s General Plan, Housing Element, and Economic Development Element (EDE)
❖ Future Planned Land Uses from zoning maps and comprehensive plan ❖ December 2019 West Area Specific Plan (WASP)
❖ June 2020 Central Area Specific Plan (CASP)
❖ City Municipal Separate Storm Sewer System (MS4) (stormwater system map) ❖ 2NDNATURE on-line platform
❖ 2NDNATURE Technical Memo of Salinas Precipitation Frequency Projections ❖ As-built data
❖ City GIS Data including the storm drain system, land use, and Future Growth Areas (FGA) ❖ Information on the operation and maintenance of the system and known flooding, erosion, maintenance problem areas and other deficiencies, through discussions with City personnel
❖ Rim elevations of Storm Drain Manholes (SDMH) and other facilities (outfall or catch basin) and invert elevations of the flow lines and diameter of pipes through survey effort conducted by Wallace Group
❖ Hydrologic and hydraulic criteria from the City’s 2013 Storm Water Development Standards (SWDS) and the August 2021 Final SWDS
❖ Preliminary Design Report for Cesar Chavez Park Dry Basin Assessment

E N V I R O N M E N T A L R E V I E W
In accordance with Title 14, California Code of Regulations, Chapter 3, Article 18 (Statutory Exemptions), this SWMPU is considered a planning study and therefore adoption of this document is exempt from the Salinas Stormwater Master Plan Update October 2024
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requirements to prepare Environmental Impact Reports (EIR) or Negative Declarations (ND). However, on a project-specific basis, California Environmental Quality Act (CEQA) must be satisfied for any major capital improvement projects described in this report that will be implemented by the City in the future, through the preparation of an appropriate EIR or ND.

A U T H O R I Z A T I O N A N D S C O P E O F W O R K In December 2021, the City authorized Wallace Group to prepare a comprehensive Stormwater Master Plan Update. The scope of work is as follows:

Task 1. Document Review and Data Collection
Wallace Group reviewed the existing 2004 Stormwater Master Plan and City documents, including but not limited to the 2NDNATURE on-line platform, the Salinas General Plan, and the EDE. Data collection included review of the City’s as-built data, known flooding, erosion, and maintenance problem areas, and GIS data. Wallace Group also prepared a Preliminary Findings Memorandum which served as the basis for the storm drain analysis prepared for this Master Plan.

Task 2. Field Effort & GIS Update
Task 2.1 Survey Storm Drain Manholes
Wallace Group surveyed the rim elevations of each SDMH or other facilities (outfall or catch basin) to be modeled and di p the manholes to obtain the invert elevation (invert in and invert out) of the flow lines and the diameter of the pipes. Based on photos and visual observation from ground surface, Wallace Group ascertained pipe material.

Task 2. 2 Update GIS Database
Based on data collected, Wallace Group in coordination with our subconsultant Second Nature updated the City’s GIS database (2NFORM). 2NFORM can be used to generate GIS maps and atlas maps for the City’s MS4 permit.

Task 3. Develop a Storm Drain Model
Wallace Group utilized data collected in Task s 1 and 2, and the updated GIS database for use in the Innovyze modeling program (InfoSWMM). The storm drain system has been modeled under existing and future buildout conditions for the 5-, 10-, 20-, and 100 -year storm (24 -hour rainfall). In addition, potential impacts of climate change were modeled based on future rainfall projections provided by Second Nature. The City’s detention basins and trunk storm drain mains (typically 24-inch and larger), were modeled with enough detail to identify hydraulic constraints, predict pipe flows including existing trunk capacity, predict conduit overflows, identify mainlines that are at or near capacity and recommend upsizing to accommodate for future growth, and quantify the effects of detention, surcharge storage, and overflow flood storage.

Task 4. Develop Capital Improvement Program
Using data collected during Field Investigations, and the modeling efforts of Task 3, Wallace Group has developed a Storm Drain Capital Improvements Project s (CIP) recommending high, medium, low, and maintenance level priority projects and improvements necessary to address identified system deficiencies. Improvements recommended in the 2004 stormwater master plan were reviewed to determine if any of the uncompleted improvements are still necessary. The costs of each recommended improvement were estimated as well.

Capital improvement plan recommendations developed for the Stormwater Master Plan were incorporated into the City’s asset management program by Second Nature, for compliance with section 1.1.c of the MS4 permit.

Salinas Stormwater Master Plan Update October 2024
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Task 5. Draft and Final Stormwater Master Plan Update
Wallace Group prepared a draft Stormwater Master Plan report for City review and comment. Upon receiving written comments from the City for the draft Stormwater Master Plan report, Wallace Group addressed City comments and prepared the Final Stormwater Master Plan Update.

A C K N O W L E D G E M E N T S
The City of Salinas SWMPU is prepared by Wallace Group on behalf of the City of Salinas. Wallace Group gratefully acknowledges the City of Salinas and 2NDNATURE for their efforts, involvement, and assistance in preparing the City of Salinas SWMPU.

City of Salinas
Adriana Robles, P.E., City Engineer
Heidi Niggemeyer, CPSWQ, CPESC, QSP/D, NPDES Program Manager Shinobu Okano, Stormwater Analyst

2NDNATURE
Nicole Beck, Ph.D., CEO
Catherine Riihimaki, Ph.D., Research Director

The City of Salinas SWMPU was completed with the efforts of many Wallace Group team members. They include:

Kari Wagner, P.E., Principal/Director of Water Resources Valerie Huff, P.E., Senior Civil Engineer
Andrea Kingsbury, P.E., Civil Engineer
Alexander Murray, P.E., Civil Engineer
Alexandra Cass, E.I.T, Associate Engineer

Salinas Stormwater Master Plan Update October 2024
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C H AP T E R 2

ST U DY A R EA C H A R AC TE R IST I C S

This Chapter presents an overview of the characteristics of the study area. This chapter establishes the regional watershed conditions, topography, climate, existing and future land uses , and HSGs within the study boundary.

All figures are located at the end of this chapter.

I N T R O D U C T I O N
The City of Salinas is the largest city in Monterey County and serves as the County seat. The City has a long heritage as the financial and industrial center of Monterey County. US Route 101 bisects the City, while California State Route 68 heads west to M onterey and California State Route 183 runs northwest to Castroville. The City was incorporated in 1874 and is known as the “Salad Bowl of the World” for its large agricultural industry.

S T U D Y A R E A
The following sections discuss the existing characteristics of the study area as well as the existing and future land uses. Establishing existing and future land use for the City is important for evaluating stormwater runoff due to land surface conditions. The existing land uses are based on the City’s Geographic Information System (GIS) database and General Plan Land Use Map.

Regional Watershed
The City of Salinas is the largest community in the Salinas River Watershed. Near the City of Salinas, the Salinas River watershed is comprised of two major subwatersheds, the Reclamation Ditch watershed and the Lower Salinas River watershed. The Reclamation Ditch subwatershed drains to the Old Salinas River and contains Tembladero Slough and its tributaries: the Reclamation Ditch, Espinosa Slough/Santa Rita Creek, Gabilan Creek, Natividad Creek, Alisal Creek, and Towne Creek. The Lower Salinas River subwatershed drains to the Salinas River Lagoon and contains the Salinas River and its tributaries: Blanco Drain, Toro Creek, Quail Creek, and Chualar Creek.

Both the Old Salinas River and the Salinas River Lagoon empty to Monterey Bay.

Receiving Waters Characterization
The City’s NPDES Permit Order R3-2019-0073, effective October 1, 2019, characterizes the City’s receiving water bodies as follows:

Stormwater runoff is generated from various land uses in the Order coverage area and discharges into receiving waters, which in turn flow into Monterey Bay. Four major creeks and several minor tributaries pass through the Salinas area and receive stormwater discharges from the Order coverage area northeast and adjacent to Highway 101. Santa Rita Creek carries stormwater discharges from a small portion of the Order coverage area to Espinosa Slough. The three other major creeks —Natividad, Gabilan, and Alisal Creeks—are interconnected. Alisal Creek becomes the Reclamation Ditch. Natividad and Gabilan Creeks flow through the northeastern portion of the City to Carr Lake. Carr Lake is often dry and is utilized for farming, but also functions to detain stormwater flows. Flows leaving Carr Lake discharge to the Reclamation Ditch. The Reclamation Ditch flows west from the Order coverage area, paralleling the Alisal Slough and eventually discharges to the Tembladero Slough. Espinosa and Tembladero Sloughs discharge to the Old Salinas River. Stormwater from the southernmost portion of the City flows to a lift station which discharges to the Salinas River. The Salinas River, like Espinosa and Tembladero Sloughs, discharges to the Old Salinas River during low -flow periods and Salinas Stormwater Master Plan Update October 2024
2-2
directly to Monterey Bay during high flows. The Old Salinas River discharges into the Pacific Ocean at the downstream end of the Elkhorn Slough and Moro Cojo Slough estuary system near Moss Landing. (pg. 6)

FIGURE 2-1 shows the receiving waters in Salinas.

Study Boundary
The SWMPU study boundary includes the City’s storm drain system and tributary drainage areas This area generally follows the City boundary, as shown on FIGURE 2-2, and also includes some agricultural areas outside City limits that drain to and have an impact on the City’s storm drain system. The following FGAs and Target Areas are included in the study area based on existing drainage patterns or proposed storm drain systems that would tie-into the City’s existing main storm drain trunkline (24-inches and greater):

❖ Portion of the WASP that will connect to the City’s storm drain system, per the WASP Closed Conduit Stormwater System layout (Figure 7 -5 of the 2019 WASP, attached in Appendix C)
❖ East Area Specific Plan
❖ East FGA
❖ The Ag-Industrial Center area at the southwest corner of the City ❖ All Target Areas as identified by the City’s EDE, except B and F which do not drain to the City’s storm drain system

The following areas are not included in the study area based on drainage patterns that outfall to an existing creek and are not anticipated to drain through the City’s storm drain system:

❖ The northwest portion of the WASP that drains directly to Santa Rita Creek, per the WASP Closed Conduit Stormwater System layout (Figure 7-5 of the 2019 WASP) ❖ The northwest portion of the East Area Specific Plan that drains directly to Natividad Creek ❖ The CASP that drains to both Gabilan Creek and Natividad Creek, per the CASP Conceptual Storm Drain Layout (Figure 6-8 of the 2020 CASP, attached at the end of this memo) ❖ The Southeast FGA that drains directly to Alisal Creek ❖ The West Boronda FGA that drains directly to Markeley Swamp and the Reclamation Ditch ❖ Bolsa Knolls drains directly to Santa Rita Creek
❖ Target Areas B and F that drain to directly Alisal Creek

Topography
The City of Salinas generally slopes in a westerly and southwesterly direction. Elevations range from approximately 140 ft in the northeast corner of the City at Boronda Road and Williams Road to approximately 30 ft in the southwest corner of the City at South Davis Road and West Blanco Road.

The 2017 United States Geological Survey (USGS) aerial lidar data, report CA AZ FEMA R9 LIDAR 2017 D18, was used as the basis for identifying overland drainage flow paths and land slope. The absolute vertical accuracy of this study was 15 cm Root-Mean-Square-Deviation (RMSE).

Climate
Salinas Stormwater Master Plan Update October 2024
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The City of Salinas has a temperate climate, with an average daytime high temperature ranging from 71°F during the summer months to 63°F during the winter months. The City’s yearly rainfall averages around 15 inches, with most of the rain occurring in between November through April. January is typically the rainiest month, with an average monthly rainfall of 3.3 inches. All climate data was obtained from the National Centers for Environmental Information U.S. Climate Normals for the weather station Salinas #2, with records from 1991-2020.

Land Use
The City is comprised of 12,455 acres of land, zoned for residential, commercial, industrial, agricultural, and public facilities. TABLE 2-1 summarizes the different land uses in the City’s boundary and includes the special assessment district in Bolsa Knolls since it is part of the City’s existing service area. Land use data shown on FIGURE 2-3 is a combination of GIS data provided by the City and the General Plan Land Use Map.

T A B L E 2 - 1 C I T Y E X I S T I N G L A N D U S E

N U M B E R
O F

P A R C E L S

A R E A
( A C R E S )
% O F S E R V I C E

A R E A
L O W D E N S I T Y R E S I D E N T I A L 18,253 3,003 24.1% M E D I U M D E N S I T Y R E S I D E N T I A L 6,906 929 7.5% H I G H D E N S I T Y R E S I D E N T I A L 2,007 635 5.1% M O B I L E H O M E 9 116 0.9%
C O M M E R C I A L 1,397 1,297 10.4%
I N D U S T R I A L 306 814 6.5%
H O T E L 34 34 0.3%
S C H O O L 59 752 6.0%
P U B L I C / S E M I- P U B L I C 232 1,294 10.4%
O P E N S P A C E 4 31 0.2%
A G R I C U L T U R E 51 3,261 26.2%
V A C A N T 324 289 2.3%
T O T A L 29,482 12,455 100%

Future Land Use
One major purpose of the SWMPU is to forecast the impact of future developments on stormwater runoff to the existing stormwater system. Additional runoff may be contributed by growth areas in the future, both within and outside City limits. Both the City’s General Plan and EDE were used as the sources to evaluate future land use. The EDE is the most recent document, dated September 2017, and is the eighth element of the 2002 City’s General Plan. The EDE provides amendments to the City’s General Plan that reflects the goals, policies, and actions outlined in the EDE. Focused Growth Areas, FGAs, and Target Areas are shown on FIGURE 2-4.

The development types found in the General Plan and the EDE provide the most conservative projections for City buildout in the Year 2045. However, it is important to note that these are based on planning projections and preliminary locations around the City. As future developments enter final engineering and design, it is Salinas Stormwater Master Plan Update October 2024
2-4
recommended that the City re -evaluate the storm drain model based on more accurate runoff projections, engineering plans, and storm drain tie-in locations.

Focused Growth Areas
The General Plan identifies five (5) Focused Growth Areas to accommodate new developments.

The Focused Growth Areas are:

❖ Laurel Drive at North Main Street
❖ North Main Street/Soledad Street
❖ East Alisal Street/East Market Street
❖ Abbott Street
❖ South Main Street

According to the General Plan, these areas of existing developments would “benefit from redevelopment or revitalization, change of land uses, and/or the incorporation of mixed -use residential uses.” Runoff from these focused growth areas will be modeled based on the future land use designation; however, the impact to the City’s storm drain system is likely marginal since most focused growth areas already contribute existing runoff. Additional modeling may be necessary in the event of more intensification of use. These Focused Growth Areas and the future land uses per the City’s General Plan are shown on FIGURE 2-4.

Future Growth Areas
Four (4) FGA s were identified in the City’s General Plans as areas outside the City limits where new growth will occur on land that is currently used for agricultural production. The FGAs are:

❖ North Boronda FGA
❖ East FGA
❖ Southeast FGA
❖ West Boronda FGA

The FGAs and future land uses associated per the City’s General Plan are shown on Figure 2-5. In 2008, the North Boronda FGA was annexed into the City. Prior to development, FGAs are subject to the adoption of Specific Plans by the City Council. The North Boronda FGA was split into three (3) Specific Plans: West Area, Central Area, and East Area, shown on FIGURE 2-4. In December 2019, the WASP was approved by City Council, and in 2020, the Draft CASP was made public for review. These Plans specify the ultimate distribution, location, and intensity of land uses.

Soils
The soil characteristics within the City are an important factor when considering runoff. Runoff is directly impacted by the amount of water a soil can absorb as defined by its infiltration rate and Hydrologic Soil Group (HSG).

Hydrologic Soil Groups
The Natural Resources Conservation Service (NRCS) evaluates and assigns each soil type a n HSG rating of A, B, C, or D. A n HSG represents soils with similar stormwater runoff potential under similar storm and ground cover conditions. Soil properties considered for the HSG rating may also influence infiltration rate, including depth to groundwater table, saturated hydraulic conductivity, and depth to a layer with slow water transmission rate. An HSG designation of “A” represents a soil with lower runoff poten tial, while an HSG designation of “D” represents a soil with higher Salinas Stormwater Master Plan Update October 2024
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runoff potential. A summary of this classification and breakdown of the City’s HSGs is listed in TABLE 2-2 and illustrated on FIGURE 2-5. A small area of soil near Natividad Creek is classified as C/D. There are also minor areas where HSG is not classified, such as open water bodies. To be conservative, these areas were modeled as soil type D.

T A B L E 2 - 2 . C L A S S I F I C A T I O N O F H Y D R O L O G I C S O I L G R O U P S S o i l
G r o u p T e x t u r e C o m p o s i t i o n I n f i l t r a t i o n R a t e
A c r e s
w i t h i n
S t u d y A r e a
P e r c e n t
o f S t u d y
A r e a
A Gravel, Sand < 10 % Clay,
> 90% Sand High 794 5.1%
B Sandy Loam, Loamy
Sand
10 – 20 % Clay,
50 – 90 % Sand Moderate 0 0%
C
Loam, Silt
Loam, Sandy
Clay Loam,
Silty Clay
Loam, Clay
Loam
20 – 40 % Clay,
< 50 % Sand Slow 10,773 69.4%
D Clay > 40 % Clay,
< 50 % Sand Very Slow 3,959 25.5%
T O T A L 15,526 100%

A lisal Slough
Old Salinas River
ReclamationDitch
Gabilan
CreekTembladero Slough
A lis al Creek
AlisalCreek
Tributary
Natividad Creek
Santa Rita Creek
SalinasRiver
Carr Lake
Heins Lake
Markeley
Swamp
Mill Lake
EXHIBIT NOTES:

WALLACE GROUP DID

NOT PERFORM SURVEY
SERVICES FOR THIS MAP.

NOT A LEGAL DOCUMENT.

SWMPU
FIGURE 2-1. SALINAS RECEIVING WATERS1 inch = 9,000 Feet O
JOB NO: 886-0022
CREATED BY: AMC/AJM
DATE: 09/27/2024
LEGEND
City Boundary
Salinas River
City Lakes
Waterway
Creek
Reclamation Ditch

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WATER RESOURCES
612 CLARION COURT
SAN LUIS OBISPO, CA 93401
T 805 544-4011 F 805 544-4294
www.wallacegroup.us

GabilanCreek
Bolsa Knolls
East FGA
West Area
Specific Plan
East Area
Specific Plan
Southeast FGA
Central Area
Specific Plan
West Boronda
FGA
SalinasRiver
Alisal Creek
Alisal Creek Tr ibutary
Santa R itaCreek
Natividad Creek
Santa Rita Creek Tributary
SalinasRiver
Reclamation Tributary
Ag-Industrial Center
B
K
L
V
V
N
K
F
B
NOTES:

WALLACE GROUP DID

NOT PERFORM SURVEY
SERVICES FOR THIS MAP.

NOT A LEGAL DOCUMENT.

SWMPU
FIGURE 2-2. SWMPU STUDY AREA
1 in = 5,000 Feet
O
JOB NO: 886-022
CREATED BY: AMC/ASK
DATE: 09/24/2024
LEGEND
Creek
Reclamation Ditch
Study Area
City Boundary
Bolsa_Knolls
Future Growth Areas
Central Area Specifc Plan
East Area Specific Plan
East FGA
Southeast FGA
West Area Specific Plan
West Boronda FGA
Industrial FGA
Target Areas
B, Industrial, Commercial
F, Commercial
K, Commercial
L, Commercial
N, Commercial
V, Commercial

CIVIL ENGINEERING

CONSTRUCTION MANAGEMENT

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MECHANICAL ENGINEERING

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WATER RESOURCES
612 CLARION COURT
SAN LUIS OBISPO, CA 93401
T 805 544-4011 F 805 544-4294
www.wallacegroup.us
NOTES:

WALLACE GROUP DID

NOT PERFORM SURVEY
SERVICES FOR THIS MAP.

NOT A LEGAL DOCUMENT.

JOB NO: 886-022
CREATED BY: AMC/ASK
DATE: 09/24/2024
NOTES:

CREATED BY: AJM
DATE: 09/27/2024
LEGEND
Study Area
LAND_USE
Agriculture
Commercial
General Industry
High Density Residential
Light Industry
Low Density Residential
Medium Density Residential
Open Space
Parking/Roads
Public/Semi-Public
School
Vacant
NOTES:

WALLACE GROUP DID

NOT PERFORM SURVEY
SERVICES FOR THIS MAP.

NOT A LEGAL DOCUMENT.

CIVIL ENGINEERING

CONSTRUCTION MANAGEMENT

LANDSCAPE ARCHITECTURE

MECHANICAL ENGINEERING

PLANNING

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WATER RESOURCES
612 CLARION COURT
SAN LUIS OBISPO, CA 93401
T 805 544-4011 F 805 544-4294
www.wallacegroup.us
1 inch = 5,000 feet
JOB NO: 886-0022
CREATED BY: AMC/ASK
DATE: 09/24/2024
1 in = 5,000 Feet
O

CIVIL ENGINEERING

CONSTRUCTION MANAGEMENT

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WATER RESOURCES
612 CLARION COURT
SAN LUIS OBISPO, CA 93401
T 805 544-4011 F 805 544-4294
www.wallacegroup.us
NOTES:

WALLACE GROUP DID

NOT PERFORM SURVEY
SERVICES FOR THIS MAP.

NOT A LEGAL DOCUMENT.

JOB NO: 886-022
CREATED BY: AMC/ASK
DATE: 09/24/2024
SWMPU
FIGURE 2-3. EXISTING LAND USE
NOTES:

CREATED BY: AJM
DATE: 09/27/2024
West Area
Specific Plan
East
FGA
East Area
Specific Plan
Target Area F
Target Area B
Target Area N
Target Area V
Target Area L
Target Area K
Ag-Industrial
Center
LEGEND
Study Area
Commercial
General Industry
High Density Residential
Light Industry
Low Density Residential
Medium Density Residential
Open Space
Parks
Public/Semi-Public

CIVIL ENGINEERING

CONSTRUCTION MANAGEMENT

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MECHANICAL ENGINEERING

PLANNING

PUBLIC WORKS ADMINISTRATION

SURVEYING/GIS SOLUTIONS

WATER RESOURCES
612 CLARION COURT
SAN LUIS OBISPO, CA 93401
T 805 544-4011 F 805 544-4294
www.wallacegroup.us
O
1 inch = 5,000 feet
JOB NO: 886-0022
CREATED BY: AMC/ASK
DATE: 09/27/2024
NOTES:

WALLACE GROUP DID

NOT PERFORM SURVEY
SERVICES FOR THIS MAP.

NOT A LEGAL DOCUMENT.
1 in = 5,000 Feet
O

CIVIL ENGINEERING

CONSTRUCTION MANAGEMENT

LANDSCAPE ARCHITECTURE

MECHANICAL ENGINEERING

PLANNING

PUBLIC WORKS ADMINISTRATION

SURVEYING/GIS SOLUTIONS

WATER RESOURCES
612 CLARION COURT
SAN LUIS OBISPO, CA 93401
T 805 544-4011 F 805 544-4294
www.wallacegroup.us
NOTES:

WALLACE GROUP DID

NOT PERFORM SURVEY
SERVICES FOR THIS MAP.

NOT A LEGAL DOCUMENT.

JOB NO: 886-022
CREATED BY: AMC/ASK
DATE: 09/24/2024
SWMPU
FIGURE 2-4. FUTURE LAND USE
NOTES:

CREATED BY: AJM
DATE: 09/27/2024
SalinasRiver
Alisal Creek
Santa R itaCreek
Natividad Creek
SalinasRiver
Reclamation Ditch
NOTES:

WALLACE GROUP DID

NOT PERFORM SURVEY
SERVICES FOR THIS MAP.

NOT A LEGAL DOCUMENT.
1 in = 5,000 Feet
O
JOB NO: 886-0022
CREATED BY: AMC/AJM
DATE: 09/27/2024
LEGEND
Study Area
Waterways
Creek
Reclamation Ditch
HSGs
A
C
C/D
D

CIVIL ENGINEERING

CONSTRUCTION MANAGEMENT

LANDSCAPE ARCHITECTURE

MECHANICAL ENGINEERING

PLANNING

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SURVEYING/GIS SOLUTIONS

WATER RESOURCES
612 CLARION COURT
SAN LUIS OBISPO, CA 93401
T 805 544-4011 F 805 544-4294
www.wallacegroup.us
GabilanCreek
1 in = 5,000 Feet
O

CIVIL ENGINEERING

CONSTRUCTION MANAGEMENT

LANDSCAPE ARCHITECTURE

MECHANICAL ENGINEERING

PLANNING

PUBLIC WORKS ADMINISTRATION

SURVEYING/GIS SOLUTIONS

WATER RESOURCES
612 CLARION COURT
SAN LUIS OBISPO, CA 93401
T 805 544-4011 F 805 544-4294
www.wallacegroup.us
NOTES:

WALLACE GROUP DID

NOT PERFORM SURVEY
SERVICES FOR THIS MAP.

NOT A LEGAL DOCUMENT.

JOB NO: 886-022
CREATED BY: AMC/ASK
DATE: 09/24/2024
SWMPU
FIGURE 2-5. HYDROLOGIC SOIL
GROUPS
NOTES:

CREATED BY: AJM
DATE: 09/27/2024
Salinas Stormwater Master Plan Update October 2024
3-1
C H AP T E R 3

STO R M D R AIN SYST E M OV E RV IE W

This Chapter provides an overview of the City’s existing stormwater collection system. All figures are located at the end of this chapter.

D A T A S O U R C E S
The following sources were used to get a complete image of the existing MS4 system:
❖ 2NFORM Platform
❖ GIS Data
❖ Topographic Survey
❖ Record Drawings

S T O R M D R A I N S Y S T E M O V E R V I E W
The City owns and operates an MS4 that conveys stormwater runoff to major receiving waters, which ultimately flow to Monterey Bay. As discussed, the major receiving waters include the reclamation ditch, Carr Lake, Gabilan Creek, Natividad Creek, Santa Rita Creek, Markeley Swamp, and the Salinas River. FIGURE 3-1 at the end of this chapter provides an overview of the City’s storm drain system per the City’s GIS.

Storm Drain Mapping
The City’s existing storm drain system GIS mapping was updated based on field survey and review of existing record drawings and system maps provided by the City. Field Survey efforts conducted by Wallace Group , collected rim elevations of SDMHs and other facilities (outfall or catch basin) and invert elevations of the flow lines and diameter of pipes to be used in the hydraulic modeling effort.

Horizontal measurements were based on the North American Datum (NAD) of 1983 California State Plane Zone 4 Feet Coordinate System. Vertical measurements were based on North American Vertical Datum (NAVD) of 1988.

A survey control report is attached in Appendix C.

It is important to note that unforeseen field conditions, such as inaccurate GIS locations of lines, buried manholes, difficulty opening manholes, and dense vegetation, can leave areas of missing survey data. In these instances, as- built drawings of the storm drain system, and the City’s GIS have been used to create a comprehensive storm drain network for the model.

Storm Drain Pipes
The Salinas MS4 system consists of approximately 140 miles of pipe, with diameters ranging from 4 -inch to 84- inch (TABLE 3-1). A majority of the pipes (58%) are considered to be the City’s main trunkline (24-inch or greater).

Any pipes with an “unknown” diameter and/or material have been assigned a diameter and/material in the hydraulic model based on upstream and downstream pipes. FIGURE 3-1 shows the entire storm drain system in the City of Salinas.

Salinas Stormwater Master Plan Update October 2024
3-2
T A B L E 3 - 1 . S T O R M D R A I N S Y S T E M P I P E I N V E N T O R Y B Y D I A M E T E R

D I A M E T E R
( I N )

L E N G T H
( M I L E S )
% O F S T O R M

D R A I N S Y S T E M
U N K N O W N* 8.3 6.1 %
4 t o 10 - I N C H 0.3 0.2 %
12 & 1 4- I N C H 3.7 2.7 %
15 - I N C H 19.7 14.5%
1 6 & 1 8- I N C H 20.9 15.4 %
2 0 , 2 1 & 22 - I N C H 4.7 3.5%
2 4 & 2 5- I N C H 21.6 15.9 %
2 7 - I N C H 4.0 3.0 %
30 - I N C H 11.6 8.5 %
33 - I N C H 2.3 1.7 %
3 6 - I N C H 10.4 7.7 %
3 9 & 4 2- I N C H 9.8 7.2 %
48 - I N C H 4.9 3.6 %
5 4 & 5 5- I N C H 5.0 3.7 %
60 - I N C H 3.9 2.9 %
66 - I N C H 1.5 1.1 %
72 - I N C H 1.4 1.0%
7 8 & 8 4 - I N C H 1.8 1.3%
T O T A L 135.8 100%
* P i p e s w i t h u n k n o w n d i a m e t e r s a r e p r i m a r i l y l a t e r a l s ( L e s s t h a n 2 4 i n ) t h a t w e r e n o t i n c l u d e d i n t h e s u r v e y o r m o d e l

For this SWMPU, only main trunklines were included in the study, with some exceptions for 18- and 21-inch storm drains. Small stand-alone systems of 24-inch pipe that drain directly to an outfall were not included. There are a number of storm drain outfalls that flow to channels or open space that are tributaries to major waterways. The boundary conditions (downstream water surface elevation) for these instances are discussed in Chapter 5.

Storm Drain Manholes
Based on the City’s current GIS database, the existing storm drain system contains 2,118 manholes. As part of this SWMPU, over 1,150 SDMHs have been surveyed to date along the City’s main storm drain trunk line.

Storm Drain Inlets
According to the City’s GIS database, there are 3,815 inlets throughout the City that range in type from siphons to curb or drop inlets and catch basins. Inlet capacity is not analyzed as part of the SWMPU; the storm drain model has assumed 100% inlet efficiency, meaning that all tributary flows are conservatively assumed to enter the pipes.

Salinas Stormwater Master Plan Update October 2024
3-3
Flooding areas of concern that have been identified by the City as specific to inlet performance have been considered for the identification of capital improvement projects, however, hydraulic performance of inlets w as not evaluated.

Lift Stations
The City's storm drain system includes three small lift stations and one pump station. Two (2) of the lift stations are owned and operated by the City to drain localized low spots at major underpasses. These two (2) lift stations are located at the Alisal Street underpass, and at the intersection of Front and Market Streets. A third small lift station is owned and operated by Caltrans. Similarly, this lift station drains a low spot at an underpass and is located on North Main Stree t north of Market Street. These small lift stations are not included in the hydraulic model. Stormwater from these catchment areas were assigned to the modeled trunkline tributary to these areas.

The Salinas River Storm Drainage Pump Station and the Blanco Detention Basin are located at the former Wastewater Treatment Plant (TP1) site at the southwest boundary of the City. The pump station receives stormwater from the southwestern part of the City and conveys it to the Salinas River though a 66 inch corrugated metal pipe. During low flow, the water can be conveyed through gravity discharge, but increased flow is pumped to the River. The pump station has two pumps with a peak capacity of 110 cfs. The Blanco Detention Basin can temporarily store water if inflow exceeds the pump station capacity. The Blanco Detention Basin has a capacity of 36 AF with freeboard and up to 50 AF when the basin is completely full. The Salinas River Storm Drainage Pump Station was modeled as an outfall to determine influent peak flows into the pump station. The pump hydraulics of the pump station to the Salinas River are not included in the SWMPU modeling effort.

The 66 inch outfall from the pump station to the Salinas river was installed in 1960, and the last assessment of the pipe was approximately 45 years ago per the 2004 Stormwater Masterplan. A reassessment should be performed to determine its current condition to confirm the need for and timing of rehabilitating (lining) or replacement of the pipe. Based on the last assessment, it is likely that a rehabilitation project will be needed. An assessment of the pump station itself should also be conducted to understand what, if any, rehabilitation is needed for the pumping system as well.

Detention and Retention Basins
A key element of the City’s storm drain system are detention and retention basins. These basins help store and slow stormwater to minimize flooding and erosion downstream. The key difference between detention and retention basins is the presence of an outlet. Retention basins do not have an outlet, and water leaves only by evaporation or percolation into the ground. A detention basin has an outlet, and flow returns to the downstream drainage system at a lowered rate. The following is a list of all the basin s within the City. This list notes which basins are not included in this study based on a review of the City’s record drawings. Low Impact Development (LID) features, such as bioretention areas, are not included in this SWMPU.

❖ Auto Center Detention Basin- detention area near North Davis and Boronda Roads, in the north of the City west of Highway 101.
❖ Blanco Detention Basin- near the southwest boundary of the City adjacent to the Salinas River Storm Drainage Pump Station.
❖ Chavez Park Detention Basin- large storage area with three dry basins in Chavez Park surrounding Sanborn Creek just south of Carr Lake. Runoff from Sanborn Creek was modeled as an inflow to Chavez Park Detention Basin. Wallace Group has prepared a preliminary design report for this basin that recommends new storm drain piping and inlets, dry wells, outflow structures, and sediment removal/basin grading.

Salinas Stormwater Master Plan Update October 2024
3-4
❖ El Dorado Park Detention Basin- consists of several bioretention areas and a retention basin in El Dorado Park, located in the northeast of the City. Only the detention component was included in the hydraulic model.
❖ Harden Ranch Detention Basin- parking lot detention at shopping plaza along North Main Street north of Harden Parkway. Harden Ranch Detention Basin was not included in the hydraulic model since there is insufficient information to model this storage capacity. This results in the conservative assumption that the parking lot does not provide attenuation of peak flows. ❖ McKinnon Park Detention Basin- detention area at McKinnon Park in the northeast of the City. ❖ Monte Bella Detention Basin- detention area on the east side of the City near Alisal Road. ❖ Natividad Creek Detention Area- detention area around Natividad creek, adjacent to and tributary to Carr Lake. The Natividad Creek Detention Area is not included in this hydraulic model as it is not tributary to the City’s storm drain system.
❖ Northgate Park Retention Basin- park detention area just south of Northridge Mall. This location is shown in the City’s mapping to be an existing retention basin. However , based on field survey and record drawings, it does not appear to have any existing connection to the City’s storm drain system. ❖ Westridge Detention Basins- two detention areas separated by North Davis Road near West Laurel Drive.

These basins have a permanent water level for water quality. Storage for these basins was modeled above the permanent water surface elevation.

In addition to the detention and retention basins, there are also multiple lakes within the City that feed into the Reclamation Ditch: Carr Lake, Heins Lake, Mill Lake, and Markeley Swamp. These lakes are not included in this study.

Reclamation Ditch
The Reclamation Ditch flows east to west, bisecting the City, and collects most of the City’s stormwater. Monterey County Water Resources Agency (MCWRA) owns and operates the Reclamation Ditch. City storm drain outfalls for the main trunk lines that are tributary to the Reclamation Ditch were modeled as part of this SWMPU, but the hydraulics of the Reclamation Ditch are not included in this analysis.

H I G H P R I O R I T Y A R E A S
The two agencies responsible for flood control within Salinas are the City and the MCWRA. The City is responsible for local flood control facilities and MCWRA is responsible for regional flood control facilities. Floods in residential areas are considered hazardous due to the potential for injury and property damage. Business and commercial activities can be impeded by floods due to facility damage and access related problems.

The City has a significant number of existing issues with flooding during storm events. Flooding in the City has been caused by sediment heavy runoff from adjacent agricultural fields. This tends to occur at the boundary of the City, mainly in the northeast. Agricultural water can overtop the tailwater ditches and either enter the City’s storm drain system at inlets at the boundary or flow in City streets to an inlet with capacity. The high sediment content of the agricultural runoff leads to blockages in the system. Another cause of flooding in the City has been the use of siphons that require frequent maintenance. Maintenance needs arise when silt and debris settle in the siphons and can cause localized ponding if not cleaned.

The City provided a list of areas that require frequent storm drain cleaning, siphon cleaning, and stormwater barricade locations. These locations, along with known areas of flooding provided by the City, are compiled in a spreadsheet provided in Appendix B. FIGURE 3-2 identifies the location of these City areas of concern, which have Salinas Stormwater Master Plan Update October 2024
3-5
been considered for capital improvement projects in the SWMPU. A field visit with City staff was conducted to investigate some of these areas in depth and help identify recommended projects.

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5 Alisal Creek
ReclamationDitch
Alisal Creek
Alisal Creek Tr ibutary
Santa R itaCreek
Natividad Creek
SalinasRiver
Chavez Park
Blanco
El Dorado Park
Auto Center
Westridge Basins
McKinnon Park
Monte Bella
NOTES:

WALLACE GROUP DID

NOT PERFORM SURVEY
SERVICES FOR THIS MAP.

NOT A LEGAL DOCUMENT.
1 in = 5,000 Feet
O
JOB NO: 886-022
CREATED BY: AJM
DATE: 09/27/2024
LEGEND
Study Area
Detention Basins
!< Storm Drain Outfalls
Storm Drain Pipes
5 Salinas River Storm Drainage Pump Station
Waterways
Creek
Reclamation Ditch

CIVIL ENGINEERING

CONSTRUCTION MANAGEMENT

LANDSCAPE ARCHITECTURE

MECHANICAL ENGINEERING

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WATER RESOURCES
612 CLARION COURT
SAN LUIS OBISPO, CA 93401
T 805 544-4011 F 805 544-4294
www.wallacegroup.us
1 in = 5,000 Feet
O

CIVIL ENGINEERING

CONSTRUCTION MANAGEMENT

LANDSCAPE ARCHITECTURE

MECHANICAL ENGINEERING

PLANNING

PUBLIC WORKS ADMINISTRATION

SURVEYING/GIS SOLUTIONS

WATER RESOURCES
612 CLARION COURT
SAN LUIS OBISPO, CA 93401
T 805 544-4011 F 805 544-4294
www.wallacegroup.us
SWMPU
FIGURE 3-1. STORM DRAIN SYSTEM
Gabilan Creek
Carr Lake
Heins Lake
Markeley
Swamp
Natividad Creek
Detention Area
Mill Lake
Chavez Park
Harden Ranch
Blanco
El Dorado ParkNorthgate Park
Auto Center
Westridge
McKinnon Park
Monte Bella
SalinasRiver Alisal Creek
AlisalCreek Trib utary
Santa R itaCreek
Natividad Creek
Santa Rita Creek Tributary
SalinasRiver
Reclamation Tributary
71 70
69 72
68 67
64 62
61 60
59 58
57 56
5351
50 49
47 46
40 39
38 3534
33 30
28 24
1615
13 82
90 76
86 73
91 79
80 87
77 83
8184
89 88
75 85
78 74
55 54
92 NOTES:

WALLACE GROUP DID

NOT PERFORM SURVEY
SERVICES FOR THIS MAP.

NOT A LEGAL DOCUMENT.
1 in = 5,000 Feet
O
JOB NO: 886-022
CREATED BY: AMC/ASK
DATE: 09/27/2024
LEGEND
Study Area
'Storm Drain AOC
!( Siphon
Flooding AOC
Detention Basins
Waterways
Creek
Reclamation Ditch

CIVIL ENGINEERING

CONSTRUCTION MANAGEMENT

LANDSCAPE ARCHITECTURE

MECHANICAL ENGINEERING

PLANNING

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SURVEYING/GIS SOLUTIONS

WATER RESOURCES
612 CLARION COURT
SAN LUIS OBISPO, CA 93401
T 805 544-4011 F 805 544-4294
www.wallacegroup.us
1 in = 5,000 Feet
O

CIVIL ENGINEERING

CONSTRUCTION MANAGEMENT

LANDSCAPE ARCHITECTURE

MECHANICAL ENGINEERING

PLANNING

PUBLIC WORKS ADMINISTRATION

SURVEYING/GIS SOLUTIONS

WATER RESOURCES
612 CLARION COURT
SAN LUIS OBISPO, CA 93401
T 805 544-4011 F 805 544-4294
www.wallacegroup.us
NOTES:

WALLACE GROUP DID

NOT PERFORM SURVEY
SERVICES FOR THIS MAP.

NOT A LEGAL DOCUMENT.

JOB NO: 886-0022
CREATED BY: AMC/AJM
DATE: 09/27/2024
NOTES:

WALLACE GROUP DID

NOT PERFORM SURVEY
SERVICES FOR THIS MAP.

NOT A LEGAL DOCUMENT.

JOB NO: 886-022
CREATED BY: AMC/ASK
DATE: 09/24/2024
SWMPU
FIGURE 3-2. STORMWATER

AREAS OF CONCERN
NOTES:

CREATED BY: AJM
DATE: 09/27/2024
Salinas Stormwater Master Plan Update October 2024
4-1
C H AP T E R 4

H YD ROLO GI C A NA LYS IS ME T H OD O LOG IES

This Chapter presents the hydrologic considerations, and a review of the City’s relevant hydrologic storm drain design standards included in the storm drain system analysis. All figures are located at the end of this chapter.

I N T R O D U C T I O N
The City’s 2013 SWDS provides information on storm drain design and analysis requirements. The hydrologic design standards were incorporated for this study. The hydrologic data provides the means to determine the runoff draining to each portion of the City’s storm drain system.

H Y D R O L O G Y A N A L Y S I S C R I T E R I A
This section describes the hydrologic parameters and criteria that were used for this analysis. The hydrologic criteria applied to the storm drain system for this analysis are listed in TABLE 4-1.

T A B L E 4 - 1 . H Y D R O L O G I C C R I T E R I A F O R E X I S T I N G S Y S T E M S

S T A N D A R D C R I T E R I A

R E T U R N I N T E R V A L
20-year for commercial/industrial areas and main trunk
5-year for residential and local drainage facilities

R A I N F A L L P A T T E R N
24-hour: NRCS Type I
6-hour: From 2013 SWDS
R A I N F A L L D E P T H Varies by return interval and location, SEE TABLE 4-2 R U N O F F M O D E L EPA-SWMM Method
R U N O F F C O E F F I C I E N T Percent impervious based on land use I N F I L T R A T I O N M O D E L Horton’s Method

Design Storm (Flood Protection Levels)
The City’s 2013 SWDS states that a 20-year, 6-hour duration design storm shall be used for design of stormwater infrastructure in commercial and industrial areas and for main trunklines, and the 5 -year design storm shall be used for residential and local drainage facilities. For this SWMPU, the City has requested hydraulic modeling of the storm drain collection system under existing and future development conditions for the 5-, 10-, 20-, and 100- year 24-hour storms. The 6-hour duration storms presented in T able 5 of the 2013 SWDS was also evaluated to confirm there are no additional storm drain deficiencies compared to the 24-hour storm. The analysis of the storm drain system is focused on trunklines, so the 20 -year 24-hour storm is the primary design storm of interest to identify capital improvement projects.

NOAA Atlas 14, Volume, 6, Version 2, Precipitation Frequency Estimates from the Precipitation Frequency Data Server (PFDS) were evaluated to determine rainfall depths across the City. Higher rainfall values are seen in the northern portions of the City than the southern areas, likely due to a difference in topographic conditions . Two (2) rainfall depths were distributed across the study area to account for this difference . A higher rainfall depth was assigned for drainage areas north of Carr Lake and Laurel Drive, and a lower rainfall depth was assigned to the remaining drainage areas. TABLE 4-2 provides the storm depths per NOAA Atlas 14. See the Precipitation Frequency Estimates in Appendix C for more detail on rainfall depths for these locations.

Salinas Stormwater Master Plan Update October 2024
4-2
T A B L E 4 - 2 . N O A A A T L A S 1 4 2 4 - H O U R D E S I G N S T O R M P R E C I P I T A T I O N

D E P T H

R E T U R N P E R I O D

N O R T H E R N S A L I N A S

P R E C I P I T A T I O N

D E P T H ( I N )

S O U T H E R N S A L I N A S

P R E C I P I T A T I O N

D E P T H ( I N )
5 - Y E A R 2.27 2.06
10 - Y E A R 2.67 2.41
20 - Y E A Ra 3.06 2.76
100 - Y E A R 4.27 3.88
a The 20-year precipitation depth was determined using the NOAA Precipitation Data Server -based depth- duration-frequency curves.

The NRCS Type I rainfall distribution was used to temporally distribute the 24 -hour storm events and the 2013 SWDS distribution was used for the 6 -hour storm events. See Appendix C for more detail on the 6 -hour storm distribution.

Runoff Model
The City’s 2013 SWDS allows for use of the Rational Method for peak flow calculations for drainage areas of 10 acres or less. For areas larger than 10 acres and evaluation of detention basin facilities, the City requires computer simulation methods that perform volumetric flow routing. Since a majority of the catchment areas defined by the City are larger than 10 acres, the computer simul ation modeling software that was used for the preparation of this SWMPU is Innovyze InfoSWMM. Within InfoSWMM the Environmental Protection Agency (EPA) SWMM method was used to model runoff to the storm drain system.

The EPA SWMM method uses land use (percent impervious) along with catchment slopes, widths, and surface roughness to determine the runoff hydrograph (flow over time) for a catchment. More detail on the inputs for this runoff model can be found later in this chapter.

Infiltration Model
Soil infiltration rates contribute to determining the amount of rainfall that enters the soil and does not become runoff. The Horton Equation is recommended by the 2013 SWDS to represent how infiltration capacity depends on the initial moisture condition of the soil and the intensity of rainfall. The modeled infiltration with the Horton Equation used the infiltration rates in TABLE 4-3 along with a decay rate of 0.00115 per second to account for the decline in infiltration capacity as soils become more saturated, in accordance with the City’s 2013 SWDS.

Salinas Stormwater Master Plan Update October 2024
4-3
T A B L E 4 - 3 . I N F I L T R A T I O N R A T E S
H y d r o l o g i c
S o i l G r o u p
I n f i l t r a t i o n R a t e
S o i l A s s o c i a t i o n s W i t h i n
S t u d y A r e a
M a x i m u m
( i n / h r )
M i n i m u m
( i n / h r )
A 6.0 2.0 Sandy xerorthents
B 2.0 0.6 Chualar loams, Elder sandy loam
C 0.6 0.2 Rincon clay loams, Salinas loam,
Salinas clay loam
D 0.2 0.06
Antioch very fine sandy loams,
Clear Lake clays, Diablo clays,
Placentia sandy loams

H Y D R O L O G Y M O D E L D A T A
This section describes the hydrologic information used to develop the hydrology portion of the storm drain model.

Catchment Areas
Catchments define the storm drain model areas that consider rainfall and route the resulting runoff to the storm drain system. The catchment areas for this analysis were delineated using a combination of the City’s storm drain inlet locations and the 2017 USGS aerial lidar data. A total approximate area of 12,220 acres is covered by these catchments. FIGURE 4-1 at the end of this chapter shows these catchments. The USGS topography data was also used to determine catchment area slopes for velocity and time to peak hydrologic calculations.

Percent Impervious
The 2013 SWDS provides a range of percent impervious values by land use. TABLE 4-4 shows this range along with the percent impervious values that were used. For this SWMPU, agriculture and vacant land uses were separated out from the 2013 SWDS parks and open space category.

Salinas Stormwater Master Plan Update October 2024
4-4
T A B L E 4 - 4 . P E R C E N T I M P E R V I O U S
L a n d U s e
P e r c e n t
I m p e r v i o u s p e r
2 0 1 3 S W D S
P e r c e n t
I m p e r v i o u s f o r

S W M P U

E X I S T I N G R E S I D E N T I A L
L O W D E N S I T Y 30-50 40
M E D I U M D E N S I T Y 50-60 55
H I G H D E N S I T Y 60-80 70

N E W R E S I D E N T I A L
L O W D E N S I T Y 50-70 60
M E D I U M D E N S I T Y 60-80 70
H I G H D E N S I T Y 70-90 80
C O M M E R C I A L 90-100 95
L I G H T I N D U S T R Y 70-80 75
G E N E R A L I N D U S T R Y 90-100 95

S C H O O L S , P U B L I C &

S E M I P U B L I C
F A C I L I T I E S 40-60 50

P A R K S A N D O P E N

S P A C E
10-20

15 A G R I C U L T U R E 5
V A C A N T 5

A G R I C U L T U R E
P L A S T I C C O V E R -- 87.5

A plastic cover land use designation was added to represent the agricultural fields that may use impervious plastic for farming purposes, such as strawberry farms and hoop houses. In the offsite drainage analysis prepared by Wallace Group for the East Boronda Road Widening Project, a percent impervious value of 87.5% was assigned for strawberry farming. This number was calculated using a typical section, provided by the City, showing the width of impervious plastic per row of strawberries. Based on Google Earth imagery of the City’s agricultural areas, it appears that up to 50% of the agricultural land within the SWMPU study area may use plastic cover at any given time. For the hydrology model it was assumed that 50% of all agricultural land use has plastic cover.

Within the FGAs, future residential development is expected to have more impervious coverage compared to the existing agricultural land. However, it is important to understand that future development will be required to follow the City’s SWDS, which require s peak flow management. Therefore, future developed conditions may reduce peak flows compared to agricultural practices that use plastic cover. Percent impervious for future conditions was assigned in the model as the same as existing conditions to repres ent peak flow management.

Salinas Stormwater Master Plan Update October 2024
4-5
Capital improvement projects identified under existing conditions due to runoff from agricultural practices with plastic crop could be considered temporary solutions that may not be needed when future development occurs.

Catchment Surface Roughness
Manning’s n roughness values for the ground surface are a factor in the runoff calculation process to determine the velocity and peak flow from a catchment area. For this study two (2) different Manning’s n value were used,

0.015 for impervious land cover and 0.12 for pervious. These Manning’s n values are typical for sheet flow conditions over concrete/asphalt and pervious land uses.

Depression Storage
A hydrologic consideration for the losses between rainfall and runoff is depression storage. This occurs when low points, such as surface depressions, fill before becoming runoff. This can occur on both pervious and impervious surfaces. Per the City’s 2013 SWDS, depression storage values for pervious areas were set to 0.18 inches and impervious area to 0.06 inches.

2 N D N A T U R E C L IM A T E C H A N G E A N A L Y S I S The City has partnered with 2 NDNATURE, a stormwater modeling and information management software company, to improve their stormwater management and compliance. 2NDNATURE designed and built the 2NFORM platform for collecting and visualizing stormwater program data. The map -based software is built on ESRI’s ArcGIS system and has enabled the City to increase the efficiency and effectiveness of their stormwater program. The City utilizes 2NDNATURE’s platform for stormwater information management and asset management.

Climate Resiliency
The team at 2NDNATURE has been researching the effects that climate change resulting from elevated CO2 levels will have on frequency and intensity of rainfall events. Researchers expect that these climate change effects will include greater stormwater volumes, higher peak flow levels, a nd increased frequency and high intensity storm events. To evaluate the City’s stormwater collection system’s resiliency to these effects, 2NDNATURE evaluate d the outputs from several Global Climate Change Models (GCM) to provide projected precipitation de pths corresponding to the 5-, 10-, and 20-year recurrence interval depths at two locations within the City.

Results of Climate Change Analysi s
2NDNATURE evaluated changes in rainfall depth for two (2) future climate change scenarios and three (3) storm recurrence intervals (5-, 10-, and 20-year). 2NDNATURE’s climate change results from the analysis were provided to the City in a technical memorandum and is attached in Appendix C . Their results for the more severe climate change scenario had percent precipitation depth changes ranging from an 8-11% increase for the different storm levels. An increase of 10% was chosen as a representative and conservative increase in precipitation to account for climate change. The projected rainfall depths are shown in TABLE 4-5. These projected rainfall depths were run through the InfoSWMM storm drain model using the NRCS Type I rainfall distribution.

Salinas Stormwater Master Plan Update October 2024
4-6
T A B L E 4 - 5 . C L I M A T E C H A N G E 2 4 - H O U R D E S I G N S T O R M P R E C I P I T A T I O N

D E P T H S

R E T U R N P E R I O D

N O R T H E R N S A L I N AS

C L I M A T E C H A N G E

P R E C I P I T A T I O N

D E P T H ( I N )

S O U T H E R N S A L I N AS

C L I M A T E C H A N G E

P R E C I P I T A T I O N

D E P T H ( I N )
5 - Y E A R 2.50 2.27
10 - Y E A R 2.94 2.65
20 - Y E AR 3.37 3.04

Gabilan Creek
ReclamationDitch
Alisal Creek
Alisal Creek Tr ibutary
Santa R itaCreek
Natividad Creek
SalinasRiver
NOTES:

WALLACE GROUP DID

NOT PERFORM SURVEY
SERVICES FOR THIS MAP.

NOT A LEGAL DOCUMENT.

JOB NO: 886-022
CREATED BY: AJM
DATE: 09/27/2024
LEGEND
Study Area
Modeled Catchment Areas
Waterways
Creek
Reclamation Ditch

CIVIL ENGINEERING

CONSTRUCTION MANAGEMENT

LANDSCAPE ARCHITECTURE

MECHANICAL ENGINEERING

PLANNING

PUBLIC WORKS ADMINISTRATION

SURVEYING/GIS SOLUTIONS

WATER RESOURCES
612 CLARION COURT
SAN LUIS OBISPO, CA 93401
T 805 544-4011 F 805 544-4294
www.wallacegroup.us
NOTES:

WALLACE GROUP DID

NOT PERFORM SURVEY
SERVICES FOR THIS MAP.

NOT A LEGAL DOCUMENT.
1 in = 5,000 Feet
O
JOB NO: 886-022
CREATED BY: AMC/ASK
DATE: 09/27/2024

CIVIL ENGINEERING

CONSTRUCTION MANAGEMENT

LANDSCAPE ARCHITECTURE

MECHANICAL ENGINEERING

PLANNING

PUBLIC WORKS ADMINISTRATION

SURVEYING/GIS SOLUTIONS

WATER RESOURCES
612 CLARION COURT
SAN LUIS OBISPO, CA 93401
T 805 544-4011 F 805 544-4294
www.wallacegroup.us
1 in = 5,000 Feet
O

CIVIL ENGINEERING

CONSTRUCTION MANAGEMENT

LANDSCAPE ARCHITECTURE

MECHANICAL ENGINEERING

PLANNING

PUBLIC WORKS ADMINISTRATION

SURVEYING/GIS SOLUTIONS

WATER RESOURCES
612 CLARION COURT
SAN LUIS OBISPO, CA 93401
T 805 544-4011 F 805 544-4294
www.wallacegroup.us
NOTES:

WALLACE GROUP DID

NOT PERFORM SURVEY
SERVICES FOR THIS MAP.

NOT A LEGAL DOCUMENT.

JOB NO: 886-0022
CREATED BY: AMC/AJM
DATE: 09/27/2024
NOTES:

WALLACE GROUP DID

NOT PERFORM SURVEY
SERVICES FOR THIS MAP.

NOT A LEGAL DOCUMENT.

JOB NO: 886-022
CREATED BY: AMC/ASK
DATE: 09/24/2024
SWMPU
FIGURE 3-2. STORMWATER

AREAS OF CONCERN
SWMPU
FIGURE 4-1. MODELED CATCHMENT
AREAS
1 in = 5,000 Feet
O
1 in = 5,000 Feet
O
FIGURE
JOB NO: 886-022
CREATED BY: AJM
DATE: 09/27/2024
NOTES:

CREATED BY: AJM
DATE: 09/27/2024
Salinas Stormwater Master Plan Update October 2024
5-1
C H AP T E R 5

H YD R AU L I C A N A LYSI S M ET H O D OLO G I ES

This Chapter presents the hydraulic considerations, and a review of the City’s relevant hydraulic storm drain design standards included in the storm drain system analysis. All figures are located at the end of this chapter.

I N T R O D U C T I O N
The City’s 2013 SWDS provides information on storm drain design and analysis requirements. Standard criteria from the 2013 SWDS was used to analyze the model to determine system deficiencies in existing and future conditions. Hydraulic information for the system provides the means to evaluate the performance of pipes and storage basins in the storm drain system under the different hydrologic scenarios. FIGURE 5-1 shows the modeled storm drain system.

H Y D R A U L I C A N A L Y S I S C R I T E R I A
This section describes the hydraulic parameters and criteria that were used for this analysis. The hydraulic criteria applied to the storm drain system are listed in TABLE 5-1.

T A B L E 5 - 1 . H Y D R A U L I C C R I T E R I A F O R E X I S T I N G S Y S T E M S

S T A N D A R D C R I T E R I A

V E L O C I T Y
Minimum: 2.0 fps when full
Maximum: 8.0 fps

F R I C T I O N F A C T O R
M A N N I N G ’ S N
See TABLE 5-2

M I N I M U M P I P E S I Z E
15-inch for mainline
12-inch for catch basin laterals

S U R C H A R G I N G
Acceptable with a minimum freeboard of 1-foot below
ground level
P I P E F L O W M O D E L Manning’s Equation
P I P E R O U T I N G M O D E L Dynamic Wave

Allowable Velocities
The 2013 SWDS requires that storm drain slopes provide a velocity of no less than two fps or more than eight fps when flowing full, but improvement projects are not recommended based on these criteria. In general, pipes with lower velocities will require more frequent cleaning.

Minimum Pipe Sizes
The 2013 SWDS require s a minimum mainline pipe diameter of 15 -inches, with 12 -inch diameters allowed for catch basin laterals, provided they have adequate capacity and have a 1% minimum slope. Pipes less than the minimum size were not considered for this analysis. As maintenance and upgrades are done, the City should use their asset management database to identify and address these minimum pipe size non-conformances.

Salinas Stormwater Master Plan Update October 2024
5-2
Surcharging
Storm drains in the hydraulic model were evaluated to convey peak flow with the hydraulic grade line below ground level. Surcharging is when water exceeds the capacity of the storm drain pipe and fills the manholes.

Surcharging within the manhole is acceptable with a minimum freeboard of 1-foot below ground level. Pipes were considered deficient if they have less than the minimum of 1 -foot freeboard during the associated design storm which would result in water coming out of the manholes and onto the surface.

Pipe Flow Model
Manning’s equation was used to calculate pipe velocities and depths for gravity flow in the model. This equation uses Manning’s n pipe friction factors, pipe slopes, and pipe sizes to determine the hydraulic capacity of the storm drain system. It will also calculate the flow depth given a specific inflow.

Pipe Routing Model
Dynamic wave analysis was used for flow routing through the storm drain collection system. This method uses St.

Venant flow equations, consisting of continuity and momentum equations for conduits and a flow continuity equation at nodes.

H Y D R A U L I CS M O D E L D A T A
The main trunk storm drain system (24-inch and larger, with some exceptions) was analyzed to evaluate system performance under both existing and future flow conditions . This section describes the information used to develop the hydraulic portion of the storm drain model. FIGURE 5-1 provides an overview of the modeled existing storm drain pipes.

Pipe Geometry
Pipe location, length, diameter, upstream and downstream inverts were assigned from information in the 2NFORM Platform, GIS data, record drawings, or from the topographic survey. All this data is used in hydraulic calculations to determine pipe capacity and deficiencies.

Friction Factors
Consistent with the City’s standards, TABLE 5-2 provides the roughness coefficient (n -value) that were used for this analysis.

T A B L E 5 - 2 . R O U G H N E S S C O E F F I C I E N T S

T Y P E O F F A C I L I T Y n

C O N C R E T E P I P E
Under 24” diameter 0.015
Over 24” diameter 0.013

P L A S T I C P I P E
HDPE (ADS N-12 or equal) 0.012
Corrugated Metal Storm Drain 0.024

If pipe material is unknown, it was inferred from the upstream and downstream pipes.

Salinas Stormwater Master Plan Update October 2024
5-3
Outfall Boundary Conditions
The City’s storm drains flow to the major waterbodies, which have the potential to influence hydraulic capacity of the storm drains due to backwater effects. The potential backwater effects of Carr Lake, the Reclamation Ditch and the major creeks were accounted for in the model by assigning the water surface elevations as stated in the Federal Emergency Management Agency (FEMA) Flood Insurance Study (FIS).

In 2017 FEMA released an updated FIS report of Monterey County, California. The FIS report includes flood profiles that were used to determine the flood elevations at outfall locations for the 10 -, 50-, and 100 -year storms. In 2021, FEMA published a preliminary draft of Monterey County’s FIS report that includes additional flood mapping for the City of Salinas. The higher of the flood elevations from both FIS reports was used for outfalls along the major waterways with FEMA defined flood profiles. The FIS r eports did not provide data for the 5 - and 20-year storms. Linear interpolation between the 10- and 50- year storms were used to calculate the 20-year water surface elevation. The 10-year water surface elevation was assigned to the 5-year storm. Outfalls that are tributary to a waterway but not directly along a FEMA flood profile were assigned a tailwater condition equal to the top of the outfall pipe.

Retention and Detention Basins
The various basins connected to the City’s storm drain system were included in the model to represent their contributions to storing and slowing stormwater. The available storage, inlet/outlet elevations, and connected infrastructure were determined from record drawing review and analyzing available topographic data. The basins in the InfoSWMM model can be seen in FIGURE 5-1.

2017 USGS aerial lidar data was used for storage calculations of the basins listed above. As a note, this high-quality elevation data was also used for the National Flood Insurance Program. Percolation in the basins was not accounted for in the model, representing worst case operating conditions.

The 2013 SWDS sets requirements for the design of detention basins. Stormwater detention or retention is required for all new development and redevelopment projects to mitigate increases in stormwater discharges.

Storage is to be determined using a 24 -hour duration design storm, a discharge rate that does not exceed the available downstream capacity, and in conformance with the Monterey County criteria. Per the 2013 SWDS, basins are required to maintain a minimum of 2 ft of freeboard during the 100-year storm event. Basins were considered deficient if they had less than this minimum freeboard.

Flow Allocation
Storm drain inlets were not included in the computer model. Therefore, an assumption of 100% inlet efficiency is inherent in the flow distribution. Within individual catchment areas, storm drain flow was typically assigned to the most upstream modeled SDMH, with a few exceptions. This combination of assumed inlet efficiency and flow allocation results in a conservative hydraulic analysis.

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Gabilan Creek
ReclamationDitch
Alisal Creek
Alisal Creek Tr ibutary
Santa R itaCreek
Natividad Creek
SalinasRiver
Chavez Park
Blanco
El Dorado Park
Auto Center
Westridge Basins
McKinnon Park
Monte Bella
NOTES:

WALLACE GROUP DID

NOT PERFORM SURVEY
SERVICES FOR THIS MAP.

NOT A LEGAL DOCUMENT.

SWMPU
FIGURE 5-1. MODELED STORM
DRAIN SYSTEM1 in = 5,000 Feet
O
JOB NO: 886-022
CREATED BY: AJM
DATE: 09/27/2024
LEGEND
Study Area
Modeled Pipes
Modeled Detention Basins
Modeled Junctions
!< Modeled Outfalls
Waterways
Creek
Reclamation Ditch

CIVIL ENGINEERING

CONSTRUCTION MANAGEMENT

LANDSCAPE ARCHITECTURE

MECHANICAL ENGINEERING

PLANNING

PUBLIC WORKS ADMINISTRATION

SURVEYING/GIS SOLUTIONS

WATER RESOURCES
612 CLARION COURT
SAN LUIS OBISPO, CA 93401
T 805 544-4011 F 805 544-4294
www.wallacegroup.us
NOTES:

WALLACE GROUP DID

NOT PERFORM SURVEY
SERVICES FOR THIS MAP.

NOT A LEGAL DOCUMENT.
1 in = 5,000 Feet
O
JOB NO: 886-022
CREATED BY: AMC/ASK
DATE: 09/27/2024

CIVIL ENGINEERING

CONSTRUCTION MANAGEMENT

LANDSCAPE ARCHITECTURE

MECHANICAL ENGINEERING

PLANNING

PUBLIC WORKS ADMINISTRATION

SURVEYING/GIS SOLUTIONS

WATER RESOURCES
612 CLARION COURT
SAN LUIS OBISPO, CA 93401
T 805 544-4011 F 805 544-4294
www.wallacegroup.us
1 in = 5,000 Feet
O

CIVIL ENGINEERING

CONSTRUCTION MANAGEMENT

LANDSCAPE ARCHITECTURE

MECHANICAL ENGINEERING

PLANNING

PUBLIC WORKS ADMINISTRATION

SURVEYING/GIS SOLUTIONS

WATER RESOURCES
612 CLARION COURT
SAN LUIS OBISPO, CA 93401
T 805 544-4011 F 805 544-4294
www.wallacegroup.us
NOTES:

WALLACE GROUP DID

NOT PERFORM SURVEY
SERVICES FOR THIS MAP.

NOT A LEGAL DOCUMENT.

JOB NO: 886-0022
CREATED BY: AMC/AJM
DATE: 09/27/2024
NOTES:

WALLACE GROUP DID

NOT PERFORM SURVEY
SERVICES FOR THIS MAP.

NOT A LEGAL DOCUMENT.

JOB NO: 886-022
CREATED BY: AMC/ASK
DATE: 09/24/2024
SWMPU
FIGURE 3-2. STORMWATER

AREAS OF CONCERN
SWMPU
FIGURE 5-1. MODELED STORM

DRAIN SYSTEM
JOB NO: 886-022
CREATED BY: AJM
DATE: 09/27/2024
NOTES:

CREATED BY: AJM
DATE: 09/27/2024
NOTES:

CREATED BY: AJM
DATE: 09/27/2024
Salinas Stormwater Master Plan Update October 2024
6-1
C h ap te r 6

STO R M D R AIN SYST E M AN A LYS IS
This chapter presents analysis of the storm drain system for the City of Salinas . All figures are located at the end of this chapter.

I N T R O D U C T I O N
The City of Salinas storm drain system consists of multiple networks of inlets, pipes, basins, and lift stations that convey stormwater flow to either the Salinas River , Santa Rita Creek, or the Reclamation Ditch, all of which ultimately flow to Monterey Bay. A computer-based model was created using Innovyze InfoSWMM Version 15.1 hydraulic modeling program to analyze both hydrology and hydraulics of the City’s storm drain pipes and basins.

S T O R M D R A I N S Y S T E M A N A L Y S I S C R I T E R I A Refer to Chapters 4 and 5 for a detailed discussion of the hydrologic and hydraulic storm drain system criteria applied in the analysis of the City’s storm drain system.

S T O R M D R A I N M O D E L
Wallace Group developed a hy draulic model of the storm drain s ystem in Innovyze InfoSWMM Version 15.1.

InfoSWMM utilizes the EPA SWMM Model for surface runoff generation, Manning’s Equation for open channel flow (gravity pipes), and dynamic wave analysis for flow routing through the collection system. The hydraulic model results were evaluated to understand where upgrades are needed to meet the City’s requirements . See Appendix C for additional model reference data.

Storm Drain Model Extents
As stated previously, the InfoSWMM model only contains the main trunk lines in the City, their contributing drainage areas, and the basins listed in Chapter 3. FIGURE 6-1 provides and overview of the entire storm drain InfoSWMM model.

Storm Drain Network Assumptions
This section describes specific assumptions made to develop the model of the storm drain network.

Inlets
As discussed in Chapter 5, storm drain inlets were not included in the computer model , so there is an inherent assumption that 100% of the runoff is captured in each inlet. Additionally, storm drain flow was typically assigned to the most upstream modeled SDMH, with a few exceptions within individual catchment areas.

Pipes
All pipes in the model are assumed to be fully clean and in working order . This means there are no sediment backups, collapsed pipes, or other obstructions in the model. Also, any pipes with an “unknown” diameter and/or material have been assigned a diameter and/material based on upstream and downstream pipes.

Agricultural Land Cover
It was assumed that 50% of all agricultural land use has plastic cover in the hydrology model.

Salinas Stormwater Master Plan Update October 2024
6-2

S T O R M D R A I N M O D E L R E S U L T S - E X I S T I N G C O N D I T I O N S This section discusses results of the storm drain model runs representing existing land use conditions. The model results discussed in this section are based on tailwater elevations specific to each return period or equal to the crown of the storm drain outfall (full submergence).

Exhibits illustrating resulting conditions in the existing storm drain system from these various storm events can be found in Appendix E.

Deficient Pipe Velocity
Storm drain lines that do not meet the velocity criteria in the model have been identified, but construction projects were not identified from this requirement. These pipes should be considered for higher frequency cleaning. A map of existing pipes with less than the minimum velocity in the 5-year 6-hour storm can be found in Appendix E and are also included in the Maintenance Priority Project list in Appendix D.

Deficient System Capacity
Based on results of the stormwater model, approximately 37% of the modeled storm drain network does not have capacity to convey 20-year 24-hour storm peak flow. Node locations with less than one (1) foot of freeboard during the 20-year 24-hour storm event and locations with flooding in these storm events are illustrated in Appendix E along with other model result exhibits.

The following basins do not meet the two (2) foot freeboard requirement from the 2013 SWDS. These should be considered for higher frequency maintenance but are not considered for projects:

• Autocenter Basin: Minor flooding that flows to agricultural field. • El Dorado Basin: Model does not indicate any basin flooding. • McKinnon Park: Minor flooding that is relieved with addressing maintenance-level CIP projects discussed later in this report.

Refer to Appendix G for detailed outputs from the model.

S T O R M D R A I N M O D E L R E S U L T S - F U T U R E C O N D I T I O N S Future land use conditions were modeled and analyzed to understand the need for modifications to the existing storm drain system as a result of future development . Additional catchments representing future development were added to the model. The future conditions results were used to understand if additional capacity was needed for the existing conditions CIPs or if additional CIPs were needed as well.

Exhibits illustrating resulting conditions in the existing storm drain system from future development can be found in Appendix F and detailed results are located in Appendix H.

S U M P C O N D I T I O N S
Through the process of topography review and subcatchment delineation, numerous locations with sump conditions were found throughout the City’s storm drain network. Some of these locations will experience only minor shallow flooding before stormwater can surface flow; while a few of these locations do not have a means of overland escape and could experience severe flooding if the storm drain system was backed up or the inlets were clogged. These locations should be a high priority for cleaning and maintenance. Table 6-1 lists the locations with sump conditions. This list may not be all-inclusive.

Salinas Stormwater Master Plan Update October 2024
6-3
T A B L E 6 - 1 . S U M P C O N DI T I O N L O C A T I O N S

N O D E L O C A T I O N
SDCB-K7-037 N Sanborn Rd Adjacent to Walgreens
SDCB-N3-089 Woodside Dr and Redwood Pl
SDCB-O2-020 SW end of Las Cruces Way
SDMH-E3-018 S end of Auto Center Cir
SDMH-E4-010 E Northridge Mall Entrance
SDMH-F4-019 Regency Cir Cul-de-sac
SWMH-F4-038 NE corner of Cherokee Dr and N Main St Intersection SDMH-F6-020 Arcadia Way and Essex Way
SDMH-F6-026 Wimbledon Ave and Essex Way
SDMH-G4-005 NE corner of E Alvin Dr and N Main St
SWMH-G4-023 SW corner of North Salinas High School
SDMH-G5-009 SE corner of Harden Middle School on McKinnon St SDMH-G6-013 666 Calaveras Dr
SDMH-I4-008 SE Corner of Laurel Grove Residences
SDMH-J8-004 Del Monte Ave and Elkington Ave
SDMH-J8-006 Rider Ave and Las Casitas Dr
SDMH-K3-003 17 Villa St
SWMH-K3-027 307 W Market St
SWMH-K8-025 Inside Sunset Park Apartments (Del Monte Ave and Sunset St) SDMH-L2-012 Nacional St and Catalina Ave
SDMH-L3-009 31 Capitol St
SWMH-L3-041 168 W Alisal St
SDMH-L4-002 E Market Street after Railroad Bridge
SDMH-L4-017 W side of E Alisal St and Fron St Intersection SDMH-L4-031 E Gabilan St and Greenfield Alley
SDMH-L5-013 SE corner of Roosevelt St and N Madeira Ave SDMH-L5-018 NW corner of empty lot on Wood St
SDMH-L5-021 311 E Alisal St
SDMH-L5-039 W entrance to La Paz Neighborhood Park
SWMH-L5-042 N corner of Ivy St and Griffin St Intersection Salinas Stormwater Master Plan Update October 2024
6-4
SWMH-L5-047 E end of 388 E Alisal St
SDMH-L7-009 Off E Laurel Dr between Midway Ave and 2nd Ave SDMHM1-008 1164 Loyola Dr
SDMH-M4-031 E end of Summer St
SDMH-M5-005 Back of 50 Summer St
SWMH-N3-031 W Romie Ln near Park Row
SDMH-N5-007 Back lot of 500 Brunken Ave
SDMH-N5-009 Back of 91 Spicer St
SDMH-N7-006 Western most end of Airport Runway
SDMH-O2-007 1274 Los Olivos Dr
SDMH-O2-016 Los Olivos Dr and Kipling St
SWMH-O3-038 E San Joaquin St in front of the St. Ansgar’s Lutheran Church SWMH-O3-048 57 San Miguel Ave
SDMH-O4-020 NW of Katherine Ave and Pajaro Intersection SDMH-O5-006 N end of Blanco Rd and Abbot St Intersection SDMH-O5-009 1102 Santa Cruz Ave
SDMH-O6-008 Airport Blvd and Hansen St
SDMH-P5-003 S Parking lot entrance to Social Security Admin Office on Blanco Rd SDMH-P5-006 1200 Merrill St
SDMH-P6-004 N of Harkins Rd and Abbott St Intersection
SDMH-P7-006
Parking lot entrance south of Eden St to Monterey County Government at Schilling Pl
SDMH-Q6-003 Harkins Rd and Dayton St
SDMH-Q6-007 1353 Dayton St
SDMH-R7-002 9 Harris Pl

WALLACE GROUP DID

NOT PERFORM SURVEY
SERVICES FOR THIS MAP.

NOT A LEGAL DOCUMENT.

SWMPU
FIGURE 6-1. STORM DRAIN MODEL
1 in = 5,000 Feet
O
JOB NO: 886-022
CREATED BY: AJM
DATE: 09/27/2024
LEGEND
Study Area
Modeled Pipes
Modeled Detention Basins
Modeled Junctions
!< Modeled Outfalls
Modeled Catchment Areas
Waterways
Creek
Reclamation Ditch

CIVIL ENGINEERING

CONSTRUCTION MANAGEMENT

LANDSCAPE ARCHITECTURE

MECHANICAL ENGINEERING

PLANNING

PUBLIC WORKS ADMINISTRATION

SURVEYING/GIS SOLUTIONS

WATER RESOURCES
612 CLARION COURT
SAN LUIS OBISPO, CA 93401
T 805 544-4011 F 805 544-4294
www.wallacegroup.us

Salinas Stormwater Master Plan Update October 2024
7-1
C H AP T E R 7

C A P I TA L I MPROV E M E NT PRO G R A M

This Chapter presents the proposed CIP, with a brief description of the proposed projects and a preliminary cost estimate for high priority projects. Also included in the CIP recommendations are priorities for the improvements.

All figures are located at the end of this chapter.

B A S I S O F C A P I T A L I M P R O V E M E N T P R O G R A M C O S T S The CIP costs were developed based on engineering judgment, confirmed bid prices for similar work in Monterey County, consultation with vendors and contractors, established budgetary unit prices for the work, and other reliable sources. Hard construction costs are typically escalated by a factor of 1.4 to allow budget for “soft costs” that include preliminary engineering, engineering, administration, construction management and inspection costs. If an Environmental Impact Report is required for the project, this escalated factor should be increased. All CIP costs are expressed in Year 2024 dollars, using the McGraw-Hill Engineering News Record (ENR) Construction Cost Index of 13632 (September 2024). Actual project costs will vary depending on economic conditions at the time of construction and should be escalated to the year or years scheduled for the work. A map of all proposed high, medium, and low priority CIPs is shown in FIGURE 7-1. Pipes with diameters greater than 72 inches have their diameter identified to meet capacity needs and represent an amount of required capacity, not that there should be a pipe of this size. It is assumed that during design, these pipes would be reevaluated to have multiple smaller pipes or use alternative structures such as box culverts. All recommended pipe diameters represent the capacity needed if the existing storm drain is replaced. In some cases, it may be feasible for the existing storm drain to remain in place and a second parallel storm drain constructed. This would reduce the diameter required for the new pipe.

Storm Drain Upgrade Unit Costs
TABLE 7-1 and TABLE 7-2 provide costs for the recommended capital improvement projects. The unit cost for replacement of storm drains includes the proposed pipelines, new manholes, lateral re-connections for existing inlets, s torm drain bypassing, and traffic control. Trenching was assumed for all new storm drain main construction. Deep pipes, with inverts greater than nine feet below ground level, were assigned a higher unit cost to account for the additional construction needs. Additionally, the City provided a GIS overlay of the known streets with concrete in the roadway. If the project required trenching in these roads, a unit cost was applied to account for removal of concrete in the roadway.

Salinas Stormwater Master Plan Update October 2024
7-2
T A B L E 7 - 1 . S T O R M D R A I N M A I N C O N S T R U C T I O N

U P G R A D E U N I T C O S T S

C O N S T R U C T I O N T Y P E U N I T C O S T / L I N E A L F E E T 18 - I N C H H D P E $520
24 - I N C H H D P E $580
30 - I N C H H D P E $650
36 - I N C H H D P E $720
18 - I N C H C O N C R E T E $620
24 - I N C H C O N C R E T E $750
30 - I N C H C O N C R E T E $950
36 - I N C H C O N C R E T E $1,020
42 - I N C H C O N C R E T E $1,390
48 - I N C H C O N C R E T E $1,640
54 - I N C H C O N C R E T E $1,920
60 - I N C H C O N C R E T E $2,100
66 - I N C H C O N C R E T E $2,290
72 - I N C H C O N C R E T E $2,600
78 - I N C H C O N C R E T E $2,930
84 - I N C H C O N C R E T E $3,290
96 - I N C H C O N C R E T E $4,080
108 - I N C H C O N C R E T E $4,970
120 - I N C H C O N C R E T E $6,000
C O N C R E T E I N R O A D W A Y $70

C A T C H B A S I N / S I P H O N

R E P L A C E M E N T, P E R R O A D
I N T E R S E C T I O N*
$200,000

C A T C H B A S I N / S I P H O N

R E P L A C E M E N T I N

C O N C R E T E R O A D W A Y , P E R
R O A D I N T E R S E C T I O N*
$225,000
* E a c h C a t c h B a s i n / S i p h o n r e p l a c e m e n t p r o j e c t i s c o n s e r v a t i v e l y e s t i m a t e d t o h a v e f o u r c a t c h b a s i n s / s i p h o n s p e r i n t e r s e c t i o n

Salinas Stormwater Master Plan Update October 2024
7-3
T A B L E 7 - 2 . D E E P S T O R M D R A I N M A I N

C O N S T R U C T I O N U P G R A D E U N I T C O S T S

C O N S T R U C T I O N T Y P E U N I T C O S T / L I N E A L F E E T D e e p 3 0- I N C H C O N C R E T E $1,330
D e e p 3 6- I N C H C O N C R E T E $1,430
D E E P 4 2- I N C H C O N C R E T E $1,940
D E E P 4 8- I N C H C O N C R E T E $2,300
D E E P 5 4- I N C H C O N C R E T E $2,680
D E E P 60 - I N C H C O N C R E T E $2,930
D E E P 72 - I N C H C O N C R E T E $3,640
D E E P 78 - I N C H C O N C R E T E $4,100
D E E P 84 - I N C H C O N C R E T E $4,610
D E E P 96 - I N C H C O N C R E T E $5,710
D E E P 1 0 8- I N C H C O N C R E T E $6,950
D E E P 1 2 0- I N C H C O N C R E T E $8,400

Salinas Stormwater Master Plan Update October 2024
7-4

C I P R A N K I N G
The existing capital improvement projects were ranked to determine what priority the existing recommended projects should be constructed. These projects include those identified through information from site visits with the City, and the hydraulic model.

TABLE 7-3 evaluates each of the projects in four main categories. With input from the City, each category was provided a weighted score based on the relative importance of the category. The scores for each category are added together to determine each project’s final score.

The categories used for ranking are as follows:
• Flooding Frequency: How often the project area floods • Flooding Severity: How much flooding there is under the 20-year 24-hour storm • Climate Change: If there is additional flooding from climate change • Public Safety: How important the project is for roads and/or critical infrastructure

Disadvantaged Community (DAC) areas were not used for the ranking of projects, but project location relative to DAC areas were identified for potential future funding purposes.

It is recommended that the City review these projects periodically to determine if any substantial changes have occurred that may re -prioritize a project to a higher ranking. The future capital improvement projects were not ranked since they are determined by construction of the future developm ents that were identified for this SWMPU.

TABLE 7-4 is a descriptive list for high priority projects and cutsheets are provided in Appendix A.

Comparison with Identified Problem Areas
All problem areas identified from the City were incorporated into the CIP list and typically rank higher than CIPs identified solely by the hydraulic model. This is due to the frequency rating of these problem areas being the highest value since these are frequently occurring flooding issues.

T I M I N G O F R E C O M M E N D E D I M P R O V E M E N T S The existing capital improvement projects are triggered by existing deficiencies, while the future capital improvement projects are triggered by one or more future developments connecting to the City’s storm drain system or climate change impacts. All projects identified as existing deficiencies are based on the hydraulic model or information from the City and are detailed in TABLE 7-3. These existing projects are due to existing stormwater flows, but it is also important for these projects to be completed to accommodate future stormwater flows. The projects are broken into four different priority categories: high, medium, low, and maintenance. High priority projects should be addressed first when the funding is available, followed by medium and low priority projects.

The maintenance priority proj ects are only recommended to be constructed when nearby construction is occurring, or other work is being completed on the storm drain system in the same location.

Future capital improvement projects are triggered by potential future development. Since the timing of these projects has not been finalized, it is recommended that additional modeling be performed during the planning and design phases of these future developments. Improvements required to support future development should be completed before the development is brought online.

Salinas Stormwater Master Plan Update October 2024
7-5
Recommended projects have not been evaluated for potential environmental impacts as a part of this study.

Projects will be subject to the requirements of CEQA prior to approval and funding.

P O T E N T I A L S T R A T E G I C G R E E N I N F R A S T R U C T U R E Refer to the City of Salinas Green City Master Plan for potential green infrastructure implementation in City right- of-way. A few potential strategic green infrastructure projects posed in this master plan are:
• Converting Northgate Park to a detention or retention basin. • Adding retention basins on the upstream end of the City in multiple locations, providing flow and water quality (sediment from agricultural runoff) control, and opportunity for infiltration • Constructing a stormwater system overflow discharging to the Golf course on the southern side of the City. This would provide opportunity for infiltration as well as mitigate flooding in the storm drain system.

Additional opportunities could include c onverting other City parks or City owned parcels with adequate open space to small detention or retention facilities where feasible to do so.

F U N D I N G
The City of Salinas has worked to provide funding mechanisms for stormwater system improvements, operation, maintenance, and compliance with regulatory requirements such as NPDES stormwater quality requirements. The City collects development fees for all construction requiring a building permit. In addition, the City requires that new development construct the storm drain improvements that are required to serve their development, including required off-site improvements.

Opportunities for funding include:
• Implementing a stormwater discharge fee
• Allocations from the City’s General Fund or other internal funds from fees and taxes • Various Federal/State/County Grants and Loans

Grant Funding
Climate resiliency and reducing impacts from climate change is a large concern for many state and federal agencies and thus these agencies have dedicated grant funds that support projects with a focus on climate resiliency. There are opportunities for the City to apply for grants that support green infrastructure or low impact development improvements especially in blighted areas or areas with minimal green space. Low impact development should also continue to be an emphasis in areas of new construction and re-development areas.

Grant funding opportunities are changing annually; thus, the City should continue to monitor these funding sources to identify grants. The City should identify key projects that would be highly ranked for grant funding such as the Closter Park project currently underway. Matching funds are often a requirement of grant funded projects.

It will be critical that the City has the flexibility to utilize City funds as matching funds when these grants are made available.

TABLE 7-3.

CITY OF SALINAS SWMPU

STORM DRAIN CIP RANKING MATRIX
Flooding Frequency Flooding Severity Climate Change Public Safety Area of Concern = 5
5-yr and 10-yr storm = 3
20-yr storm = 1
Widespread flooding = 5
Localized flooding = 3
Minimal flooding = 1
Climate Change Impact = 5
No Climate Change Impact = 0
Critical Facility or Evac Route = 5
Major Arterial or Freeway = 5
Minor Arterial or Collector = 3
Local or Private = 1
John St & Monterey St Replace undersized inlets 5 5 5 5 20 YES $960,000 1-1 Nativdad Creek E Laurel Crossing Stabilize and restore the culvert banks 5 5 5 5 20 YES $500,000 1-2 E Romie Ln & S Main St Replace undersized inlets 5 5 5 5 20 NO $1,590,000 1-3 Madrid Entrance to Northridge Mall Nearest to Big 5 Replace undersized inlets 5 5 5 5 20 YES $710,000 1-4 Williams and Freedom Parkway Silt Basin Construct larger basin (property acquisition) 5 5 5 5 20 NO $100,000 1-5 Monte Bella Basin Remove sediment from existing basin and lower outlet invert 5 5 5 5 20 YES $510,000 1-6 Monterey St & E Gabilan St Replace undersized inlets 5 5 5 5 20 YES $720,000 1-7 Northgate Park New detention storage at existing park 5 5 5 5 20 YES $490,000 1-8 Salinas Fairways Golf Course Study to evaluate feasibility of relief flow to golf course 5 5 5 5 20 YES $100,000 1-9 Tyler St Replace existing siphons 5 5 5 5 20 YES $1,500,000 1-10 E Boronda and Williams Corner Improve ditch and construct new basin (property acquisition) 5 5 5 5 20 NO $100,000 1-11 Natividad Rd from E Alvin to E Laurel New inlets, stabilize ROW with vegetation 5 5 5 5 20 NO $1,260,000 1-12 Blanco Basin Study to evaluate necessary maintenance and inlet repairs 5 5 5 5 20 YES $100,000 1-13 Cesar Chavez Basin Perform Basin Improvements per Preliminary Design Report 5 5 5 5 20 YES $2,010,000 1-14 Salinas River Pump Station and Outfall Condition Assessment of the Salinas River Pump Station and associated outfall pipe to understand the need for and level of rehabilitation necessary 5 3 5 5 18 YES $200,000 1-15 E Boronda East of Independence Blvd Study to evaluate floodplain storage (property acquisition) 5 1 5 5 16 NO $100,000 1-16 Monte Bella Ditch Establish sediment removal program 5 1 5 5 16 YES $700,000 1-17 Santa Rita Creek - San Juan Grade and Russell Rd Study to evaluate floodplain storage (property acquisition) 5 3 5 1 14 YES $200,000 1-18 1322 Adams St Replace existing siphons 5 5 5 3 18 YES $630,000 2-1 E Alisal St Pipe Upgrades 3 5 5 5 18 NO $4,330,000 2-2
E Market St Pipe Upgrades 3 5 5 5 18 YES $7,840,000 2-3 E Blanco Rd Pipe Upgrades 3 5 5 5 18 NO $19,160,000 2-4 Maryal Dr Pipe Upgrades 3 5 5 5 18 YES $5,510,000 2-5
Russell Rd Pipe Upgrades 3 5 5 5 18 NO $3,210,000 2-6
Acosta Plz Pipe Upgrades 3 5 5 5 18 YES $8,640,000 2-7
Eucalyptus Dr Pipe Upgrades 3 5 5 5 18 YES $14,190,000 2-8 Chaparral St Pipe Upgrades 3 5 5 5 18 YES $16,520,000 2-9 Constitiution Blvd Pipe Upgrades 3 5 5 5 18 NO $7,480,000 2-10 Airport Pipe Upgrades 3 5 5 5 18 NO $14,970,000 2-11
Sherwood Dr Pipe Upgrades 3 5 5 5 18 YES $19,740,000 2-12 La Mancha Way Pipe Upgrades 3 5 5 5 18 NO $15,490,000 2-13 Rosarita Dr Pipe Upgrades 3 5 5 5 18 YES $22,530,000 2-14 W Market St Pipe Upgrades 3 5 5 5 18 YES $16,930,000 2-15 283 Chaparral St Replace existing siphons 5 5 5 3 18 YES $5,460,000 2-16 Tuscany Blvd Pipe Upgrades 3 5 5 5 18 YES $5,910,000 2-17 Iverson St & Clay St Extend storm drain, new inlets 5 5 5 3 18 NO $670,000 2-18 Lincoln Ave & Clay St Replace undersized inlets 5 5 5 3 18 YES $2,650,000 2-19 55 Santa Lucia Ave Replace undersized inlets 5 3 5 5 18 NO $670,000 2-20 North Bound Off-Ramp to W Market St. from Davis Rd Replace undersized inlets 5 3 5 5 18 YES $360,000 2-21 Salinas River Outfall Rehabilitation (relining) of 66in CMP outfall pipe along with removal of debris impacting flap gate at the Salinas River 5 3 5 5 18 YES $10,770,000 2-22 East Market St Pipe Upgrades 3 3 5 5 16 YES $3,520,000 3-1 E San Luis St & Soledad St Replace existing siphons 5 3 5 3 16 YES $1,950,000 3-2 603 Carriage Ct Replace existing siphons 5 5 5 1 16 YES $690,000 3-3 Rico St Pipe Upgrades 3 3 5 5 16 NO $4,200,000 3-4
E Laurel Dr & Noice Dr Replace undersized inlets 5 1 5 5 16 YES $1,120,000 3-5 Chaparral St & Noice Dr Replace undersized inlets 5 1 5 5 16 YES $600,000 3-6 N Davis Rd Pipe Upgrades 3 3 5 5 16 YES $6,230,000 3-7
N Main St at Harley Shop Replace undersized inlets 5 1 5 5 16 YES $630,000 3-8 Project NumberProject Location Project Description Total Score DAC Area Total Cost ($) 7-3
TABLE 7-3.

CITY OF SALINAS SWMPU

1. Intersection of S Main St and Winham St/Clay St: 4 inlets

2. Intersection of John St and Monterey St: 2 inlets

3. Intersection of John St and Soledad St: 3 inlets
$680,000 $280,000 $960,000
1-2 Natividad Creek E Laurel
Crossing
Existing culverts have experienced erosion due to scour. Stabilize and restore culvert banks Natividad Creek, E Laurel Crossing $275,000 $225,000 $500,000 1-3 E Romie Ln & S Main St Replace eight undersized curb inlets

1. Intersection of S Main St and East Acacia St: 1 inlet

2. Intersection of S Main St and Hawthorne St: 2 inlets

3. Intersection of S Main St and East Romie Ln: 3 inlets

2. South of intersection of W Gabilan St and Church St: 1 inlet $400,000 $320,000 $720,000 1-8 Northgate Park
Northgate Park does not act as a detention basin because it is not connected into the City's storm drain system. Connect the park to the storm drain system with a new pipe and overflow grate
Between Cherokee Dr and Sepulveda Dr $270,000 $220,000 $490,000 1-9 Salinas Fairway Golf Course Perform feasibility study to diverting stormwater to the golf course to reduce flooding along Alisal St South of E Alisal St $0 $100,000 $100,000 1-10 Tyler St Replace fourteen siphons/undersized curb inlets

1. Intersection of W Laurel Dr and Tyler St: 3 inlets/siphons

2. Intersection of W Laurel Dr and Polk St: 4 inlets/siphons

3. Intersection of W Laurel Dr and Monroe St: 3 inlets/siphons

CITY OF SALINAS SWMPU

1. Intersection of Natividad Rd and E Alvin Dr : 3 inlets

2. Intersection of Natividad Rd and Rainier Dr/Chaparral St: 3 inlets

3. Intersection of Natividad Rd and Pacheco St: 2 inlets

4. Intersection of Natividad Rd and E Laurel Dr: 1 inlets

5. Replace vegetation in City ROW along Natividad Rd, between E Alvin Dr to E Laurel Dr
$900,000 $360,000 $1,260,000
1-13
Blanco Basin Study to evaluate necessary maintenance and inlet repairs Blanco Basin, southwest of Blanco Rd $0 $100,000 $100,000 1-14 Cesar Chavez Basin Perform Basin Improvements per Preliminary Design Report Cesar Chavez Bain, Cesar Chavez Park $1,430,000 $580,000 $2,010,000 1-15 Salinas River Pump Station and
Outfall
Condition Assessment of the Salinas River Pump Station and associated outfall pipe to understand the need for and level of rehabilitation necessary
Salinas River Pump Station and Outfall, southwest of Blanco Rd $0 $200,000 $200,000 1-16 E Boronda East of
Independence Blvd
Perform a study to evaluate additional stormwater storage north of Boronda Rd North of E Boronda Rd, east of Independence Blvd $0 $100,000 $100,000 1-17 Monte Bella Ditch Establish a sediment removal program for Monte Bella Ditch Monte Bella Ditch, east of Sconberg Pkwy $500,000 $200,000 $700,000 1-18 Santa Rita Creek - San Juan
Grade and Russell Rd Identify opportunities to reduce surface flooding in Santa Rita Creek Santa Rita Creek, between Russell Rd and North Main St $0 $200,000 $200,000 $11.8+ million
*Soft costs include a 40% escalation of the construction costs for planning, engineering, CM, legal/admin for project with more than $400,000 in construction costs and a 80% escalation factor for projects with less than $400,000 in construction costs. **All CIP costs are expressed in May 2024 dollars, using McGraw-Hill ENR Construction Cost Index of 13532, and will need to be escalated to the year or years scheduled for the work.

HIGH PRIORITY STORM DRAIN CIP
7-4
ReclamationDitch
Alisal Creek Tr ibutary
SalinasRiver
NOTES:

WALLACE GROUP DID

NOT PERFORM SURVEY
SERVICES FOR THIS MAP.

NOT A LEGAL DOCUMENT.

SWMPU
FIGURE 7-1. STORM DRAIN CIP MAP
1 in = 5,000 Feet
O
JOB NO: 886-022
CREATED BY: AJM
DATE: 09/27/2024
LEGEND
CIP Points
High
Medium
Low
CIP Pipes
High
Medium
Low

CIVIL ENGINEERING

CONSTRUCTION MANAGEMENT

LANDSCAPE ARCHITECTURE

MECHANICAL ENGINEERING

PLANNING

PUBLIC WORKS ADMINISTRATION

SURVEYING/GIS SOLUTIONS

WATER RESOURCES
612 CLARION COURT
SAN LUIS OBISPO, CA 93401
T 805 544-4011 F 805 544-4294
www.wallacegroup.us

O
PROJECT NOTES:

ESRI BASEMAP. MAP

DEVELOPED FOR STORM
DRAIN FACILITY MANAGEMENT.

NOT TO BE USED FOR DESIGN
OR CONSTUCTION.

PUBLISHED MAY 2024.

FIGURE 7-1.

STORM DRAIN

CIP MAP
1 inch = 2,000 Feet
SHEET:
1 Legend
CIP Points
High
Medium
Low
CIP Pipes
High
Medium
Low
O
PROJECT NOTES:

ESRI BASEMAP. MAP

DEVELOPED FOR STORM
DRAIN FACILITY MANAGEMENT.

NOT TO BE USED FOR DESIGN
OR CONSTUCTION.

PUBLISHED MAY 2024.

FIGURE 7-1.

STORM DRAIN

CIP MAP
1 inch = 2,000 Feet
SHEET:
2 Legend
CIP Points
High
Medium
Low
CIP Pipes
High
Medium
Low
O
PROJECT NOTES:

ESRI BASEMAP. MAP

DEVELOPED FOR STORM
DRAIN FACILITY MANAGEMENT.

NOT TO BE USED FOR DESIGN
OR CONSTUCTION.

PUBLISHED MAY 2024.

FIGURE 7-1.

STORM DRAIN

CIP MAP
1 inch = 2,000 Feet
SHEET:
3 Legend
CIP Points
High
Medium
Low
CIP Pipes
High
Medium
Low
O
PROJECT NOTES:

ESRI BASEMAP. MAP

DEVELOPED FOR STORM
DRAIN FACILITY MANAGEMENT.

NOT TO BE USED FOR DESIGN
OR CONSTUCTION.

PUBLISHED MAY 2024.

FIGURE 7-1.

STORM DRAIN

CIP MAP
1 inch = 2,000 Feet
SHEET:
4 Legend
CIP Points
High
Medium
Low
CIP Pipes
High
Medium
Low
Salinas Stormwater Master Plan Update October 2024

A P PE ND I CES

Salinas Stormwater Master Plan Update October 2024
A P P E N D I X A : H i g h P r i o r i t y P r o j e c t C u ts h e e t s

CIP 1-1: John St & Monterey St
City of Salinas Capital Improvement Project Information Sheet 2024 Stormwater Master Plan Update
Project Trigger
Existing Condition
Future Condition
Project Components
Upgrade Gravity Pipeline
New Gravity Pipeline
New Curb Inlet(s)
Sediment Removal
Detention Facility
Inspection and/or study
New Barrier
Project Need
Existing surface flooding
Public Safety Concern
Sediment and/or debris
DAC Area Project Cost Breakdown
Yes Construction Cost1 $680,000
No Planning, Engineering, CM, Legal/Admin (40%/80%)2 $280,000 Total Project Cost $960,000
Project Description
PREPARED BY: AC/AJM
Wallace Group
www.wallacegroup.us
San Luis Obispo, CA
Various inlets throughout the City are undersized and contribute to flooding. Replace nine undersized inlets at the following locations:
- The intersection of South Main Street and Winham Street/Clay Street: 4 inlets - The intersection of John Street and Monterey Street: 2 inlets - The intersection of John Street and Soledad Street: 3 inlets

1. Construction costs are expressed in Year 2024 dollars, using an ENR construction Cost Index of 13632, and will need to be escalated to the year or years scheduled for the work.

2. Soft costs include a 40% escalation of the construction costs for planning, engineering, CM, legal/admin for project with more than $400,000 in construction costs and a 80% escalation factor for projects with less than $400,000 in construction costs.

CIP 1-1: John St & Monterey St

CIP 1-2: Natividad Creek E Laurel Crossing
City of Salinas Capital Improvement Project Information Sheet 2024 Stormwater Master Plan Update
Project Trigger
Existing Condition
Future Condition
Project Components
Upgrade Gravity Pipeline
New Gravity Pipeline
New Curb Inlet(s)
Sediment Removal
Detention Facility
Inspection and/or study
Erosion Mitigation
Project Need
Existing surface flooding
Public Safety Concern
Sediment and/or debris
DAC Area Project Cost Breakdown
Yes Construction Cost1 $275,000
No Planning, Engineering, CM, Legal/Admin (40%/80%)2 $225,000 Total Project Cost $500,000
Project Description
PREPARED BY: AC/AJM
Wallace Group
www.wallacegroup.us
San Luis Obispo, CA
There are existing culverts in Natividad Creek under East Laurel Drive that have experienced erosion due to scour.

Stabilize and restore the culvert banks to address these impacts.

1. Construction costs are expressed in Year 2024 dollars, using an ENR construction Cost Index of 13632, and will need to be escalated to the year or years scheduled for the work.

CIP 1-2: Natividad Creek E Laurel Crossing

CIP 1-3: E Romie Ln & S Main St
City of Salinas Capital Improvement Project Information Sheet 2024 Stormwater Master Plan Update
Project Trigger
Existing Condition
Future Condition
Project Components
Upgrade Gravity Pipeline
New Gravity Pipeline
New Curb Inlet(s)
Sediment Removal
Detention Facility
Inspection and/or study
New Barrier
Project Need
Existing surface flooding
Public Safety Concern
Sediment and/or debris
DAC Area Project Cost Breakdown
Yes Construction Cost1 $1,130,000
No Planning, Engineering, CM, Legal/Admin (40%/80%)2 $460,000 Total Project Cost $1,590,000
Project Description
PREPARED BY: AC/AJM
Wallace Group
www.wallacegroup.us
San Luis Obispo, CA
Various inlets throughout the City are undersized and contribute to flooding. Replace eight undersized inlets:
- The intersection of South Main Street and East Acacia Street: 1 inlet - The intersection of South Main Street and Hawthorne Street: 2 inlets - The intersection of South Main Street and East Romie Lane: 3 inlets - The intersection of South Main Street and Katherine Avenue: 2 inlets

1. Construction costs are expressed in Year 2024 dollars, using an ENR construction Cost Index of 13632, and will need to be escalated to the year or years scheduled for the work.

CIP 1-3: E Romie Ln & S Main St

CIP 1-4: Madrid Entrance to Northridge Mall Nearest to Big 5 City of Salinas Capital Improvement Project Information Sheet 2024 Stormwater Master Plan Update
Project Trigger
Existing Condition
Future Condition
Project Components
Upgrade Gravity Pipeline
New Gravity Pipeline
New Curb Inlet(s)
Sediment Removal
Detention Facility
Inspection and/or study
New Barrier
Project Need
Existing surface flooding
Public Safety Concern
Sediment and/or debris
DAC Area Project Cost Breakdown
Yes Construction Cost1 $390,000
No Planning, Engineering, CM, Legal/Admin (40%/80%)2 $320,000 Total Project Cost $710,000
Project Description
PREPARED BY: AC/AJM
Wallace Group
www.wallacegroup.us
San Luis Obispo, CA
Various inlets throughout the City are undersized and contribute to flooding. Replace three undersized inlets at the Madrid Street entrance to Northridge Mall nearest to Big 5 and add 300 feet of 18 inch pipe.

1. Construction costs are expressed in Year 2024 dollars, using an ENR construction Cost Index of 13632, and will need to be escalated to the year or years scheduled for the work.

CIP 1-4: Madrid Entrance to Northridge Mall Nearest to Big 5

CIP 1-5: Williams and Freedom Parkway Silt Basin
City of Salinas Capital Improvement Project Information Sheet 2024 Stormwater Master Plan Update
Project Trigger
Existing Condition
Future Condition
Project Components
Upgrade Gravity Pipeline
New Gravity Pipeline
New Curb Inlet(s)
Sediment Removal
Detention Facility
Inspection and/or study
New Barrier
Project Need
Existing surface flooding
Public Safety Concern
Sediment and/or debris
DAC Area Project Cost Breakdown
Yes Construction Cost1 $0
No Planning, Engineering, CM, Legal/Admin (40%/80%)2 $100,000 Total Project Cost $100,000
Project Description
PREPARED BY: AC/AJM
Wallace Group
www.wallacegroup.us
San Luis Obispo, CA
This project is a focused study. The current silt basin is undersized. This project would acquire additional property and construct a larger silt basin to mitigate offsite flows and sediment transport. This project will require coordination and discussions on cost sharing between the City and adjacent agricultural operations and is anticipated to provide benefits to stakeholders. Project costs include studies to determine feasibility and costs. This project may result in identification of additional improvement project(s); project description and cost are unknown at this time. Once the study is complete, any identified projects should be added to the Capital Improvement Program.

1. Construction costs are expressed in Year 2024 dollars, using an ENR construction Cost Index of 13632, and will need to be escalated to the year or years scheduled for the work.

CIP 1-5: Williams and Freedom Parkway Silt Basin

CIP 1-6: Monte Bella Basin
City of Salinas Capital Improvement Project Information Sheet 2024 Stormwater Master Plan Update
Project Trigger
Existing Condition
Future Condition
Project Components
Upgrade Gravity Pipeline
New Gravity Pipeline
New Curb Inlet(s)
Sediment Removal
Detention Facility
Inspection and/or study
New Barrier
Project Need
Existing surface flooding
Public Safety Concern
Sediment and/or debris
DAC Area Project Cost Breakdown
Yes Construction Cost1 $280,000
No Planning, Engineering, CM, Legal/Admin (40%/80%)2 $230,000 Total Project Cost $510,000
Project Description
PREPARED BY: AC/AJM
Wallace Group
www.wallacegroup.us
San Luis Obispo, CA
Monte Bella Basin has significant sediment build-up, hindering the performance of the basin. Remove excess sediment from the basin provide flood storage. Additionally, lower the outlet pipe by approximately two feet to provide additional storage. Reconstruct approximately 100 feet of storm drain pipe to connect the lowered outlet to the existing storm drain in Sconberg Parkway. This reduction in retention area (which is currently full of sediment) helps reduce upstream flooding in the storm drain system. The City anticipates funding this project through an existing Assessment District.

1. Construction costs are expressed in Year 2024 dollars, using an ENR construction Cost Index of 13632, and will need to be escalated to the year or years scheduled for the work.

CIP 1-6: Monte Bella Basin

CIP 1-7: Monterey St & E Gabilan St
City of Salinas Capital Improvement Project Information Sheet 2024 Stormwater Master Plan Update
Project Trigger
Existing Condition
Future Condition
Project Components
Upgrade Gravity Pipeline
New Gravity Pipeline
New Curb Inlet(s)
Sediment Removal
Detention Facility
Inspection and/or study
New Barrier
Project Need
Existing surface flooding
Public Safety Concern
Sediment and/or debris
DAC Area Project Cost Breakdown
Yes Construction Cost1 $400,000
No Planning, Engineering, CM, Legal/Admin (40%/80%)2 $320,000 Total Project Cost $720,000
Project Description
PREPARED BY: AC/AJM
Wallace Group
www.wallacegroup.us
San Luis Obispo, CA
Various inlets throughout the City are undersized and contribute to flooding. Replace five undersized inlets:
- The intersection of East Monterey Street and East Gabilan Street: 4 inlets - South of the intersection of West Gabilan Street and Church Street: 1 inlet

1. Construction costs are expressed in Year 2024 dollars, using an ENR construction Cost Index of 13632, and will need to be escalated to the year or years scheduled for the work.

CIP 1-7: Monterey St & E Gabilan St

CIP 1-8: Northgate Park
City of Salinas Capital Improvement Project Information Sheet 2024 Stormwater Master Plan Update
Project Trigger
Existing Condition
Future Condition
Project Components
Upgrade Gravity Pipeline
New Gravity Pipeline
New Curb Inlet(s)
Sediment Removal
Detention Facility
Inspection and/or study
New Barrier
Project Need
Existing surface flooding
Public Safety Concern
Sediment and/or debris
DAC Area Project Cost Breakdown
Yes Construction Cost1 $270,000
No Planning, Engineering, CM, Legal/Admin (40%/80%)2 $220,000 Total Project Cost $490,000
Project Description
PREPARED BY: AC/AJM
Wallace Group
www.wallacegroup.us
San Luis Obispo, CA
Currently, this park does not act as a detention basin because it is not connected into the City's storm drain system.

This project would connect the park to the storm drain system and allow for existing detention storage to be utilized.

This connection could be achieved with a new pipe and overflow grate.

1. Construction costs are expressed in Year 2024 dollars, using an ENR construction Cost Index of 13632, and will need to be escalated to the year or years scheduled for the work.

CIP 1-8: Northgate Park

CIP 1-9: Salinas Fairway Golf Course
City of Salinas Capital Improvement Project Information Sheet 2024 Stormwater Master Plan Update
Project Trigger
Existing Condition
Future Condition
Project Components
Upgrade Gravity Pipeline
New Gravity Pipeline
New Curb Inlet(s)
Sediment Removal
Detention Facility
Inspection and/or study
New Barrier
Project Need
Existing surface flooding
Public Safety Concern
Sediment and/or debris
DAC Area Project Cost Breakdown
Yes Construction Cost1 $0
No Planning, Engineering, CM, Legal/Admin (40%/80%)2 $100,000 Total Project Cost $100,000
Project Description
PREPARED BY: AC/AJM
Wallace Group
www.wallacegroup.us
San Luis Obispo, CA
This project is a focused study. Currently the storm drain system along East Alisal Street is overwhelmed in the 20-year storm. This project is to evaluate the feasibility of diverting stormwater flow to the golf course and reduce flooding along East Alisal Street. This project will require coordination between the City and Salinas Fairways Golf Couse and is anticipated to provide benefits to stakeholders. This project may result in identification of additional improvement project(s); project description and cost are unknown at this time. Once the study is complete, any identified projects should be added to the Capital Improvement Program.

1. Construction costs are expressed in Year 2024 dollars, using an ENR construction Cost Index of 13632, and will need to be escalated to the year or years scheduled for the work.

CIP 1-9: Salinas Fairway Golf Course

CIP 1-10: Tyler St
City of Salinas Capital Improvement Project Information Sheet 2024 Stormwater Master Plan Update
Project Trigger
Existing Condition
Future Condition
Project Components
Upgrade Gravity Pipeline
New Gravity Pipeline
New Curb Inlet(s)
Sediment Removal
Detention Facility
Inspection and/or study
New Barrier
Project Need
Existing surface flooding
Public Safety Concern
Sediment and/or debris
DAC Area Project Cost Breakdown
Yes Construction Cost1 $1,070,000
No Planning, Engineering, CM, Legal/Admin (40%/80%)2 $430,000 Total Project Cost $1,500,000
Project Description
PREPARED BY: AC/AJM
Wallace Group
www.wallacegroup.us
San Luis Obispo, CA
Various inlets throughout the City are undersized and contribute to flooding. Replace fourteen existing inlets and siphons with new catch basins and laterals to storm drain system:
- The intersection of West Laurel Drive and Tyler Street: 3 inlets/siphons - The intersection of West Laurel Drive and Polk Street: 4 inlets/siphons - The intersection of West Laurel Drive and Monroe Street: 3 inlets/siphons - The intersection of West Laurel Drive and Adams Street: 4 inlets/siphons

1. Construction costs are expressed in Year 2024 dollars, using an ENR construction Cost Index of 13632, and will need to be escalated to the year or years scheduled for the work.

CIP 1-10: Tyler St

CIP 1-11: E Boronda and Williams Corner
City of Salinas Capital Improvement Project Information Sheet 2024 Stormwater Master Plan Update
Project Trigger
Existing Condition
Future Condition
Project Components
Upgrade Gravity Pipeline
New Gravity Pipeline
New Curb Inlet(s)
Sediment Removal
Detention Facility
Inspection and/or study
New Barrier
Project Need
Existing surface flooding
Public Safety Concern
Sediment and/or debris
DAC Area Project Cost Breakdown
Yes Construction Cost1 $0
No Planning, Engineering, CM, Legal/Admin (40%/80%)2 $100,000 Total Project Cost $100,000
Project Description
PREPARED BY: AC/AJM
Wallace Group
www.wallacegroup.us
San Luis Obispo, CA
This project is a focused study. The ditch along Williams Road between East Boronda Road and Freedom Parkway experiences flooding and heavy sediment. This project is to evaluate the potential for a new sediment basin at this intersection and to provide recommendations for basin and ditch configurations. This project will require coordination and discussions on cost sharing between the City and adjacent agricultural operations and is anticipated to provide benefits to stakeholders. Project costs include studies to determine feasibility and costs. This project may result in identification of additional improvement project(s); project description and cost are unknown at this time. Once the study is complete, any identified projects should be added to the Capital Improvement Program.

1. Construction costs are expressed in Year 2024 dollars, using an ENR construction Cost Index of 13632, and will need to be escalated to the year or years scheduled for the work.

CIP 1-11: E Boronda and Williams Corner

CIP 1-12: Natividad Rd from E Alvin to E Laurel
City of Salinas Capital Improvement Project Information Sheet 2024 Stormwater Master Plan Update
Project Trigger
Existing Condition
Future Condition
Project Components
Upgrade Gravity Pipeline
New Gravity Pipeline
New Curb Inlet(s)
Sediment Removal
Detention Facility
Inspection and/or study
New Barrier
Project Need
Existing surface flooding
Public Safety Concern
Sediment and/or debris
DAC Area Project Cost Breakdown
Yes Construction Cost1 $900,000
No Planning, Engineering, CM, Legal/Admin (40%/80%)2 $360,000 Total Project Cost $1,260,000
Project Description
PREPARED BY: AC/AJM
Wallace Group
www.wallacegroup.us
San Luis Obispo, CA
Various inlets throughout the City are undersized and contribute to flooding. Replace nine undersized inlets at the following locations:
- Natividad Road and East Alvin Drive: 3 inlets
- Natividad Road and Rainier Drive/Chaparral Street: 3 inlets - Natividad Road and Pacheco St: 2 inlets
- Natividad Road and East Laurel Drive: 1 inlet
Additionally, there is debris in the street from runoff from the City right-of-way. The City right-of-way along Natividad Road needs to be stabilized with vegetation.

1. Construction costs are expressed in Year 2024 dollars, using an ENR construction Cost Index of 13632, and will need to be escalated to the year or years scheduled for the work.

CIP 1-12: Natividad Rd from E Alvin to E Laurel

CIP 1-13: Blanco Basin
City of Salinas Capital Improvement Project Information Sheet 2024 Stormwater Master Plan Update
Project Trigger
Existing Condition
Future Condition
Project Components
Upgrade Gravity Pipeline
New Gravity Pipeline
New Curb Inlet(s)
Sediment Removal
Detention Facility
Inspection and/or study
New Barrier
Project Need
Existing surface flooding
Public Safety Concern
Sediment and/or debris
DAC Area Project Cost Breakdown
Yes Construction Cost1 $0
No Planning, Engineering, CM, Legal/Admin (40%/80%)2 $100,000 Total Project Cost $100,000
Project Description
PREPARED BY: AC/AJM
Wallace Group
www.wallacegroup.us
San Luis Obispo, CA
This project is a focused study. Blanco basin has debris clogging inlets into and out of the basin and requires repair.

This project is to perform a study to understand what is required for inlet repair as well as other general maintenance for the basin. This project may result in identification of additional improvement project(s); project description and cost are unknown at this time. Once the study is complete, any identified projects should be added to the Capital Improvement Program.

1. Construction costs are expressed in Year 2024 dollars, using an ENR construction Cost Index of 13632, and will need to be escalated to the year or years scheduled for the work.

CIP 1-13: Blanco Basin

CIP 1-14: Cesar Chavez Basin
City of Salinas Capital Improvement Project Information Sheet 2024 Stormwater Master Plan Update
Project Trigger
Existing Condition
Future Condition
Project Components
Upgrade Gravity Pipeline
New Gravity Pipeline
New Curb Inlet(s)
Sediment Removal
Detention Facility
Inspection and/or study
New Barrier
Project Need
Existing surface flooding
Public Safety Concern
Sediment and/or debris
DAC Area Project Cost Breakdown
Yes Construction Cost1 $1,430,000
No Planning, Engineering, CM, Legal/Admin (40%/80%)2 $580,000 Total Project Cost $2,010,000
Project Description
PREPARED BY: AC/AJM
Wallace Group
www.wallacegroup.us
San Luis Obispo, CA
Perform the improvements to Cesar Chavez Basin recommended in the Preliminary Design Report prepared by Wallace Group. Recommendations include new storm drain piping and inlets, dry wells, outflow structures, and sediment removal/basin grading.

1. Construction costs are expressed in Year 2024 dollars, using an ENR construction Cost Index of 13632, and will need to be escalated to the year or years scheduled for the work.

CIP 1-14: Cesar Chavez Basin

CIP 1-15: Salinas River Pump Station
City of Salinas Capital Improvement Project Information Sheet 2024 Stormwater Master Plan Update
Project Trigger
Existing Condition
Future Condition
Project Components
Upgrade Gravity Pipeline
New Gravity Pipeline
New Curb Inlet(s)
Sediment Removal
Detention Facility
Inspection and/or study
New Barrier
Project Need
Existing surface flooding
Public Safety Concern
Sediment and/or debris
DAC Area Project Cost Breakdown
Yes Construction Cost1 $0
No Planning, Engineering, CM, Legal/Admin (40%/80%)2 $200,000 Total Project Cost $200,000
Project Description
PREPARED BY: AC/AJM
Wallace Group
www.wallacegroup.us
San Luis Obispo, CA
The Salinas River Pump Station is a critical stormwater facility, and if it fails, a large portion of the City will flood. This project is to perform a condition assessment for the Salinas River Pump Station and 7,500 foot long 66 inch outfall pipe to determine if and what rehabilitation or maintenance is required for the facility. This project may result in identification of additional improvement project(s); project description and cost are unknown at this time. Once the study is complete, any identified projects should be added to the Capital Improvement Program.

1. Construction costs are expressed in Year 2024 dollars, using an ENR construction Cost Index of 13632, and will need to be escalated to the year or years scheduled for the work.

CIP 1-15: Salinas River Pump Station

CIP 1-16: E Boronda East of Independence Blvd
City of Salinas Capital Improvement Project Information Sheet 2024 Stormwater Master Plan Update
Project Trigger
Existing Condition
Future Condition
Project Components
Upgrade Gravity Pipeline
New Gravity Pipeline
New Curb Inlet(s)
Sediment Removal
Detention Facility
Inspection and/or study
New Barrier
Project Need
Existing surface flooding
Public Safety Concern
Sediment and/or debris
DAC Area Project Cost Breakdown
Yes Construction Cost1 $0
No Planning, Engineering, CM, Legal/Admin (40%/80%)2 $100,000 Total Project Cost $100,000
Project Description
PREPARED BY: AC/AJM
Wallace Group
www.wallacegroup.us
San Luis Obispo, CA
This project is a focused study. Currently, the storm drain system south of East Boronda Road is overwhelmed in the 20-year storm. This project is to evaluate upstream stormwater runoff storage North of E Boronda Way. This storage would require property acquisition, but would assist in mitigating offsite flows and sediment transport. This project will require coordination between the City and adjacent agricultural operations and is anticipated to provide benefits to stakeholders. This project may result in identification of additional improvement project(s); project description and cost are unknown at this time. Once the study is complete, any identified projects should be added to the Capital Improvement Program.

1. Construction costs are expressed in Year 2024 dollars, using an ENR construction Cost Index of 13632, and will need to be escalated to the year or years scheduled for the work.

CIP 1-16: E Boronda East of Independence Blvd

CIP 1-17: Monte Bella Ditch
City of Salinas Capital Improvement Project Information Sheet 2024 Stormwater Master Plan Update
Project Trigger
Existing Condition
Future Condition
Project Components
Upgrade Gravity Pipeline
New Gravity Pipeline
New Curb Inlet(s)
Sediment Removal
Detention Facility
Inspection and/or study
New Barrier
Project Need
Existing surface flooding
Public Safety Concern
Sediment and/or debris
DAC Area Project Cost Breakdown
Yes Construction Cost1 $500,000
No Planning, Engineering, CM, Legal/Admin (40%/80%)2 $200,000 Total Project Cost $700,000
Project Description
PREPARED BY: AC/AJM
Wallace Group
www.wallacegroup.us
San Luis Obispo, CA
Monte Bella Ditch experiences excessive sediment build-up contributing to flooding in Sconberg Parkway. This project would establish a sediment removal program, including frequency of maintenance, opportunities for sediment disposal, and anticipated annual cost of maintenance. The cost of this project includes ten sediment removal cycles costed at $50k each.

1. Construction costs are expressed in Year 2024 dollars, using an ENR construction Cost Index of 13632, and will need to be escalated to the year or years scheduled for the work.

CIP 1-17: Monte Bella Ditch

CIP 1-18: Santa Rita Creek - San Juan Grade and Russell Rd City of Salinas Capital Improvement Project Information Sheet 2024 Stormwater Master Plan Update
Project Trigger
Existing Condition
Future Condition
Project Components
Upgrade Gravity Pipeline
New Gravity Pipeline
New Curb Inlet(s)
Sediment Removal
Detention Facility
Inspection and/or study
New Barrier
Project Need
Existing surface flooding
Public Safety Concern
Sediment and/or debris
DAC Area Project Cost Breakdown
Yes Construction Cost1 $0
No Planning, Engineering, CM, Legal/Admin (40%/80%)2 $200,000 Total Project Cost $200,000
Project Description
PREPARED BY: AC/AJM
Wallace Group
www.wallacegroup.us
San Luis Obispo, CA
The purpose of this study is to identify potential locations for floodplain storage to reduce surface flooding in Santa Rita Creek, between Russell Road and North Main Street. Storage options could include new detention basins or increased capacity in the creek achieved by grading the creek channel to create new floodplain benches. Floodplain benches or creek widening could potentially be in the Santa Rita neighborhood park, which would also provide opportunities for public education and outreach. New basins would assist in mitigating offsite flows and sediment transport. The project would require property acquisition as well as coordination between the City and adjacent agricultural operations. This project may result in identification of additional improvement project(s); project description and cost are unknown at this time. Once the study is complete, any identified projects should be added to the Capital Improvement Program.

1. Construction costs are expressed in Year 2024 dollars, using an ENR construction Cost Index of 13632, and will need to be escalated to the year or years scheduled for the work.

CIP 1-18: Santa Rita Creek - San Juan Grade and Russell Rd

Salinas Stormwater Master Plan Update October 2024
A P P E N D I X B : A r e a s o f C o n c e r n S u m m a r y S p r e a d s h e e t f r o m C i t y o f S a l i n a s

CITY OF SALINAS

STORMWATER AREAS OF CONCERN
Siphon? Inlet Issue? Storm Drain Issue? Sediment in Storm Drain? Debris Clogs Inlet? Other/Notes 1 N/E corner W. Laurel Dr./ Tyler St. (2)
2 3
4 5
6 7
8 N/E & S/E corners Elwood Dr. / Loma Dr. (2)
9 10 N/E & S/E corners Cresent Way and Adams St. (2)
11 12 N/E & N/W corners Maryal Dr./ Reata St.
13 Inlets and Pipes need to be bigger
14 Siphon? Inlet Issue? Storm Drain Issue? Sediment in Storm Drain? Debris Clogs Inlet? Other/Notes 15 1 Inlet and 3 half pipes on surface (under sidewalk) that carry water from one side of the corner to the other. 16 Half pipes that convey water from one side of the street to another (no Inlets) 17 18
19 20
21 22
23 24 Leaves
25 26
27 28 Leaves
29 30 There is no Inlets at this location. This is a area of HIGH concern due to flooding over the sidewalk. 31 32
33 Leaves, Undersized Inlets and Pipes
34 Leaves, Inlets Upgraded by Caltrans
35 Inlets Upgraded by Caltrans
36 37
38 Leaves
39 Leaves
40 Leaves
Siphon? Inlet Issue? Storm Drain Issue? Sediment in Storm Drain? Debris Clogs Inlet? Other/Notes 41 42
43 44
Siphon? Inlet Issue? Storm Drain Issue? Sediment in Storm Drain? Debris Clogs Inlet? Other/Notes 45 46 Leaves
47 Leaves
48 49 2 small inlets should be replaced with 1 large inlet and larger pipe size. 50 Leaves
51 Leaves
52 53 Old beehive style inlet that should be upgraded to standard inlet Siphon? Inlet Issue? Storm Drain Issue? Sediment in Storm Drain? Debris Clogs Inlet? Other/Notes 54 Leaves-Inlets Upgraded by Caltrans
55 Leaves-Inlets Upgraded by Caltrans
56 Leaves-Inlets Upgraded by Caltrans
57 Leaves-Inlets Upgraded by Caltrans
58 Leaves-Inlets Upgraded by Caltrans
59 Leaves
60 Leaves
S. Main St. & Romie Ln. (2)
S. Main St. & Hawthorne St. (1) Next to Burger King
S. Main St. & Katherine St. (1) On Southwest corner (as needed) S. Main St. & Acacia St. (1) (Southeast side)
S. Main St. & Winham St. (2)
College Dr. & Amherst Dr. (1)
Alisal St. & Church St. (1)
N & S sides of Chaparral at Noice Ditch (2)
Madrid entrance to Northridge Mall nearest to Big 5 (2) E. Laurel Dr. between Maryal Dr. & N. Main St. (6)
N. Main St. at Harley Shop (2)
Constitution Blvd. at Manchester St .(2)
2369 N. Main St. at Townhomes (1)
Linwood Dr. & Sequoia Dr. (2)
Rogge Rd. at Elementry School (1)
South Salinas
Grove St. @ Santa Ana St.

East Salinas
Sharon Dr.@ Beverly Dr.

Carriage Dr. @ Carriage Ct.

Sharon Dr. @ Barbara Pl.

Beverly Dr. @ Florence Pl.

Barricade Locations
North Salinas
N/Side W. Laurel Dr. between .Adams/101 on ramp (1)
Santa Barbara St. @ Coronado Ave.

Maple St. @ California St. (2)
Maple St. @ Front St. (2)
Clay St. @ Iverson St.

Archer St. @ Villa St.

Park St. @ West St. (4 drains)
Gabilan St. @ Monterey St. (1)
Monterey St. @ John St. (2) At gas station driveway and across Tabacchis restaurant Soledad St. @ John St.

Clay St. @ Cayuga St.

Archer St. @ Riker St.

Avelar St. @ Pine St.

Lang St. @ West St. (2)
California St. @ E. San Luis St. (4 drains)
Cherry St. @ Peach St. (2)
Geil St. @ Capital St. (2)
Geil St. @ West St. (2) North and South sides
Lang St. @ Iverson St. (2) North side and Southside across from each other IversonSt. @ Geil St. (1)
Capital St. @ Clay St. (4 drains)
Clay St. @ Riker St.

Clay St. @ Lincoln St. (2) Next to and across liquor store Nacional St. @ Santa Rosa Ave. (2)
Nacional St. @ San Clemente Ave. (2)
E. Laurel Dr. @ Adams St.
2022 Storm Drain & Siphons
North Salinas
E. Laurel Dr. @ Tyler St.

E. Laurel Dr. @ Polk St.

E. Laurel Dr. @ Monroe St.

Soledad St. @ E. San Luis St.

Chaparral St. @ Linwood Dr. (2)
Reata St. @ Linwood Dr.

Elwood Dr.@ Linwood Dr.

Elwood Dr. @ Loma Dr.

Elwood Dr. @ Angelus Dr.

Cresent Way @ Adams St.

Tapedero Dr. @ Dororo Dr.

Maryal St. @ Reata St.

E. Laurel Dr. @ Noice Dr.

Santa Teresa St. @ Rosarita Dr.

South/West Salinas

CITY OF SALINAS

STORMWATER AREAS OF CONCERN
Siphon? Inlet Issue? Storm Drain Issue? Sediment in Storm Drain? Debris Clogs Inlet? Other/Notes S. Main St. & Romie Ln. (2)
South Salinas
61 Undersized Inlets and Pipes
62 Leaves
63 64 Undersized Inlet and Pipe
Siphon? Inlet Issue? Storm Drain Issue? Sediment in Storm Drain? Debris Clogs Inlet? Other/Notes 65 66
67 Farming activities causing flooding (currently undercontrol) 68 69 Check Flood Gates for Debris
70 Debris on Behive Inlet and Sediment
71 72 Debris on Behive Inlet and Sediment
73 74
75 76
77 78
79 80
81 82
83 84
85 86
87 88
89 90
91 92
Laurel Detention Basins
Monte bello and Williams Road Silt Basin on corner
Monte Bello Ditch
Sconberg Basin Beehives
North Bound Off-Ramp to West Market St. from Davis Rd. (1) Ditch Locations to check
Santa Rita Ditch
Airport Ditch
Ditch at Boronda and McKinnon
Holding basins in Park at end of Maderia St.

Front St. & Harvest St. (2)
Pajaro St. & Maple St.(2)
55 Santa Lucia Dr. (1)
Flooding Area of Concern (shapefile received from 2N)
Flooding
Concrete channel if not cleaned can flood lower concrete channel area Santa Rita Creek at Russel Rd and San Juan Grade Rd intersection Santa Rita Creek at N Main St and Bolivar St
Notes
Flooding Area
Alisal Creek south of E Alisal St
Along Clay St from Lincoln Ave to Homestead Ave
Around Blanco Detention Basin
Long section S Main St from City boundary to Harvest St At Salinas River
Natividad Creek crossing E Laurel Dr
Near/associated with 83
Williams Rd and Freedom Pkwy
On 101 below Carr Lake
Around Monte Bella Detention Basin
E Boronda Rd and Mckinnon St
Along Natividad Rd between E Laurel and Milbrae St
W Laurel Dr bewtween the 101 and Linwood Dr
Williams Rd and E Boronda
Carr Lake
Santa Rita Creek at N Main St and Bolivar St
Santa Rita Creek at N Main St and Bolivar St
E Boronda near San Juan Grade Rd
Flooding
Outfall has a flapgate. If it gets blocked, it will block upstream Seasonal Flooding
Flooding
Rec Ditch will overflow onto streets if constricted under Alisal Flooding due to siphons
Pump station, if failed would impact a huge area of the city Flooding
Seasonal Flooding
High priority structure and road undercrossing
Flooding
Flooding from basin overflow
Concrete channel if not cleaned can flood lower concrete channel area Flooding when sediment from ag field blocks system
Flooding from channel overflow
Flooding due to lack of CBs
High traffic area, flooding as a safety concern
Salinas Stormwater Master Plan Update October 2024
A P P E N D I X C : M o d e l R e f e r e n c e D a t a

261
City of Salinas | West Area Specific Plan, December 2019 Stormwater and Water Quality Management Figure 7-5: Supplemental Stormwater Basin and Closed Conduit Stormwater System
FIGURE 7-55
Supplemental
Stormwater Basin
and Closed Conduit
Stormwater System

WEST AREA SPECIFIC PLAN
This watershed
outfalls directly to
Santa Rita Creek

SURVEY CONTROL REPORT

FOR: CITY OF SALINAS

PREPARED AT THE DIRECTION OF:

CLAYTON BRADSHAW, PLS 8298
DATE SIGNED: 6/17/2024

Page 2 of 2 ends

Salinas City CouncilMarch 11, 2025

Salinas City Council
March 11, 2025