Thank you for your interest in the Safe, Clean Water Program. Please be sure to continue to work with your District's Watershed Manager from Los Angeles County Public Works, Cung Nguyen. Mr. Nguyen can be reached at {626) 458-4341 or cunquyenCa~pw.lacountv.gov. Ongoing collaboration is imperative. If the subject project is not funded within 2 years from the date of this letter, a new demonstration of conceptual approval will be required before the project can again be considered.
Very truly yours,
MARK PESTRELLA
Chief Engineer
Las Angeles County Flood Control District
KEI`fH A. LI ~~
Assistant Depu irector
Stormwater Planning Division
SM:trP:lswppub\Secretarial\20201LettersFQistrict Conceptual Approval 28th Street Storm Drain Infiltration Project (003).doc cc: CWE (Katie Harrel)
LOS ANGELES COUNTY
DEPARTMENT OF PUBLIC WORKS
LOS ANGELES COUNTY FLOOD CONTROL DISTRICT
GUIDELINES
FOR
CONNECTION PERMITS
LAND DEVELOPMENT DIVISION
REVISED JUNE 2018
Connection Guidelines - June 2018.doc Page 2 of 14
I. PERMIT APPLICATION REQUIREMENTS
To process a req uest for a permit to connect to a Los Angeles County Flood Control District (LACFCD) facility, the following shall be submitted:
A. An electronic “Flood Construction” Permit Application at https://epicla.lacounty.gov. You must be a registered User to submit a permit application. If you need additional assistance, you may contact Land Development Division – Permits Section (Flood) Public Counter at (626) 458 - 4921.
B. Plan checking and inspection fees. To be assessed by the assigned permit Engineer after the initial completeness check upon permit application submittal.
C. Construction/Engineering plans (pdf).
D. As-built plans with the sketch of the correct location for the proposed connection (pdf).
E. WSPG Input and Output files (pdf).
F. Allowable discharge flow rate (QALLOW) and hydraulic Grade Line (HGL) – (pdf). See Section IV.
G. Contractor’s license information and insurance documents including the endorsement that names the County as additional insured (pdf).
H. For non -storm water discharges, upload a copy of the NPDES permit from the California Regional Water Quality Control Board (pdf). A separate permit (Flood Discharge) will be required to allow actual non-storm water discharges through a permitted connection.
II. GENERAL NOTES
A. Before submitting for a permit, make sure the system you are connecting to is maintained by the Los Angeles County Flood Control District (LACFCD). Information on LACFCD facilities can be found at http://dpw.lacounty.gov/fcd/stormdrain/index.cfm
B. Re-stamped and signed copies of the Department's "As -built" or final construction plans that have been altered for additional drainage connections are not acceptable for LACFCD permit purposes.
C. Plans that are required to be reviewed by other divisions of the Department of Public Works and/or the U.S. Army Corps of Engineers will be coordinated by Land Development Division - Permits Section , unless otherwise established by the Engineer proces sing your connection permit application. Please do not contact other divisions directly.
D. For projects within a City jurisdiction, the City is responsible for the review and approval of the hydrology study, onsite drainage and water quality improvements r elated to Low Impact Development (LID) requirements.
E. For projects within the Unincorporated County area, review and approval of the corresponding hydrology study, onsite drainage and water quality improvements for LID requirements must be obtained through a separate review process from either our Building and Safety Division or Land Development Division – Drainage Section.
F. Additional comments or requirements may be applicable based on your proposal.
Connection Guidelines - June 2018.doc Page 3 of 14
III. REQUIREMENTS FOR ENGINEERED PLANS
A. A vicinity map. Show the “North” arrow, scale(s) used, and elevations on the profile view(s).
B. Plan sheets should be wet stamped and signed by a professional Civil/Structural Engineer licensed to practice in California.
C. On both the plan and profile vi ews, show the exterior and interior outlines of the existing LACFCD storm drain and/or channel in dashed lines and label the storm drain with the complete LACFCD or the Army Corps of Engineers name. E.g., “Existing LACFCD 48” R CP, Project No. ___, Line ___”. Also, include the Right of Ways in dashed lines and label.
D. On the plan and profile views, show the centerline of the existing LACFCD facility in “c enterline- style” dashed lines. On the plan view, include stationing tick marks and label the stations a long the centerline of the existing LACFCD facility. Also, indicate the LACFCD Stations at all points of work that affect LACFCD facilities. NOTE: Connections to manholes or connector pipes are not allowed.
E. Show and label the property boundary and LACFCD right-of-way lines (fee and easement).
F. Plans stamped "preliminary" or "not for construction" etc. are not acceptable for permit issuance.
G. Show plan (See Attached – Sample Connection Plan) , profile, details, and dimensions for all proposed connections.
H. Label the station of the proposed line at the connection (centerline intersection). Show the D - load for reinforced concrete pipe (RCP) . For smaller connections (D<12 ”) use HDPE 35 R minimum or polyvinyl chloride pipe (PVC) of Schedule -80 minimum strengt h. Asphalt concrete pipe (ACP) and corrugated metal pipe (CMP) are not acceptable as connections to LACFCD facilities.
I. Label across the profile view who will be maintaining the proposed connection: LACFCD or Owner.
J. Call out the applicable Standard Plans for Public Works Construction (SPPWC, latest edition) Standard Plan(s) (specify applicable variables, A, B, C, etc.) or the US Army Corps Standard Drawings and Junction Structure for all proposed connections. If not per Standard, show details and cross sections of the proposed connection (allow additional time for review).
K. Show a profile view with the following items:
1. Show the connection to the nearest drainage structure (i.e. grate inlet, catch basin , etc.) related to the proposal.
2. Label “Qallowable = ___ cfs” across the top of the profile view.
3. Velocity “v” in fps at the point of connection.
4. Label the maintenance responsibility across the top of the profile view.
5. Show the HGL along the proposed connecting system.
6. Slope along the proposed connection pipe.
7. Show the elevation at the top of the grate or inlet.
8. Label the pipe size, length, material and strength across the bottom of the profile view.
9. Label the dimensions of the LACFCD facility at the point of the proposed connection.
10. Show invert elevation o f the mainline/channel and of the proposed pipe at the point of connection. If the survey invert elevation of the LACFCD facility at the proposed point of connection is inconsistent with the “as-built” plans. Provide both the as-built and survey invert elevations.
Connection Guidelines - June 2018.doc Page 4 of 14
L. Show a profile of the proposed line with the following items if it is to be maintained by LACFCD:
1. Slope along the grade line (minimum 1.0% for connector pipes)
2. Size of pipe (minimum 18" for connector pipe and a minimum 24" for laterals and mainlines)
3. Use reinforced concrete pipe (RCP) and show the D-load
NOTE: Remember to research utilities, verify utility location, and design accordingly (pothole if necessary). Show all utilities affecting your design on the plan and profile view.
IV. REQUIREMENTS FOR COMMON CONNECTIONS
1. DIRECT CONNECTION TO MAINLINE:
a. Show the invert elevation of the mainline and of the proposed line at the point of connection. Also, show the elevation of the top of grate inlet on-site. .
b. The invert of the proposed c onnection to the mainline shall be a minimum of 1 -foot above the invert of the mainline.
c. Show the slope along the proposed connector pipe.
d. Connection shall be done radially.
e. Show the existing hydraulic grade line (HGL) of the mainline.
f. Include the “Concrete Removal Notes” (See Exhibit A).
2. CONNECTION TO BACK OR SIDE OF CATCH BASIN:
1. The point of discharge shall not be on the steps of the catch basin.
2. Only one connection for a catch basin is allowed.
3. The entrance angle of the connection should be at 90 degrees.
4. The invert elevation of the connection at the catch basin should be 6 inches higher than the catch basin invert.
5. Connections larger than 12-inches are not allowed.
6. Label the invert elevation of the catch basin, of the proposed line at t he point of connection, and of the top of curb at the catch basin.
7. Label the elevation of the invert and the elevation of the top of the grate inlet on-site.
8. Include the “Concrete Removal Notes”, (See Exhibit A).
3. CONNECTION TO CONCRETE BOXES
a. For 24 -inch connections or less, the invert of the connection to the box shall be between 1 to 5 feet above the invert of the box.
b. For connections greater that 24-inches, the invert of the connection shall be between 12 inches to 18 inches above the invert of the box.
Connection Guidelines - June 2018.doc Page 5 of 14
c. The soffit of the connection to the box shall be at a minimum 1-foot below the soffit of the box.
4. DIRECT CONNECTION TO A CHANNEL
a. If the channel was constructed by the U.S. Army Corps of Engineer s, t he type of connection shall be per a Corps of Engi neers Standard Junction Structure drawings with construction details (See Exhibit C).
b. Show the profile of the pr oposed connection including the elevations at the top of channel, at the invert of the channel, and at the invert of the proposed line.
c. A flap gate will be required , but not limited to, when the elevation of the top of the proposed inlet is below the water surface elevation of the channel to avoid back flow along the proposed connection . Use automatic flap gate inlet per LACDPW Std. Plan 3061-2.
d. The Angle of Entry of the proposed connection shall meet Corps criteria.
e. The invert of the connection to the channel shall be a minimum of 1 -foot above the invert of the channel.
f. The soffit of the connection should be at a minimum 4-feet below the design water surface elevation in the channel as established by the approved hydrology study unless otherwise approved by the District Engineer.
g. Include the “Concrete Removal Notes”, (See Exhibit A).
h. Connection to a channel built by the Army Corps of Eng ineers (ACOE) and maintained by the LACFCD , will require a separate 408 permit application to be reviewed and approved by the ACOE . Applicants will be required to prepare a separate 408 -permit package to be forwarded to the ACOE by the LACFCD. The 408 -permit package shall comply with the latest submittal requirements established by the ACOE. Information on the 408 -permit submittal package could be found at
www.spl.usace.army.mil/Missions/Section-408-Permits/.
i. Connection to a channel built and maintained by the ACOE will only require a 408 permit. A flood connection permit from LACFCD will not be required in this case. The applicant will be required to submit the 408 -permit application directly to the ACOE. If the new private storm drain is within the District’s right of way (easement or fee -title), an encroachment permit will be required.
5. CATCH BASIN RELOCATION
a. Minimum 1% slope for proposed connector pipe.
b. Call out the size, length and D-load of the proposed connector pipe.
c. The horizontal alignment of connector pipes shall contain no angle points or bends.
d. Abandonment of the connector pipe s is not allowed. C all out the removal of the catch basin and connector pipe.
e. If a different size (W or V -depth) or type of catch basin or a different local depression is used, submit calculations to show the capacity of the proposed catch basin will meet the original design requirements. If an identical catch basin and local depression are used, hydrology and hydraulic calculations are not required . Show reference to all Connection Guidelines - June 2018.doc Page 6 of 14
appropriate SPPWC Std. Plans (i.e., curb opening C.B. per SPPWC 300 -2 and local depression at C.B. per SPPWC 313-2).
f. Indicate the type of local depression and “H” value o n the plans for proposed catch basins. Be sure to dimension according to the latest edition of SPPWC Standard Plan 313. “H” should be 2 inches.
g. For catch basins located at corners of intersections, submit a plan that shows the elevations of the top of cu rb and flow lines at Beginning of Curb ( BC) and End of Curb (EC) and mid-point of curb return, and 5' beyond on both sides.
NOTE: If an existing catch basin is located at a low point (i.e. sump condition) and proposed relocation of catch basin is to be upstream of the low point, ponding of nuisance water will not be allowed at the low point where the existing catch basin is removed.
V. HYDROLOGY AND HYDRAULIC DATA
An allowable discharge flow rate (Q Allow) and hydraulic grade line data (HGL) for the affected system shall be obtained from the LACDPW Design Division by emailing [email protected].
VI. HYDROLOGY AND HYDRAULIC CALCULATIONS
A. Onsite drainage and water quality reports and proposed improve ments shall be reviewed and approved by the local jurisdiction. For project s within the U nincorporated County, an approved hydrology and LID report is required. Approval of the hydrology and LID reports will be processed by either LACDPW Building and Safet y Division (Drainage Section) or Land Development Division (Drainage Section). Separate fees and additional review time will be required by the appropriate reviewing Division.
B. Size the proposed connection based on the allowable discharge flow rate (Q Allow). Submit a WSPG hydraulic analysis, including the input and output data, based on the mainline hydraulic control elevation to demonstrate the limited allowable discharge flow rate. To limit the discharge, size the connection to ensure the HGL at the most downstream proposed inlet is within 12 inches from the finished surface.
VII. NON-STORM WATER DISCHARGES
For non-storm water discharges, submit a copy of the NPDES permit from the California Regional Water Quality Control Board, which can be contacted at ( 213) 576-6600 or 320 West 4 th Street, Suite 200; Los Angeles, CA 90013.
NOTE: A separate Flood permit ( Discharge) will be required to allow actual non-storm water discharges through a permitted connection.
Connection Guidelines - June 2018.doc Page 7 of 14
EXHIBIT “A”
CONCRETE REMOVAL NOTES
WHERE REINFORCEMENT IS REQUIRED TO EXTEND THROUGH THE NEW JOINT, CONCRETE SHALL BE REMOVED IN THE FOLLOWING SEQUENCE.
1. A SAWCUT SHALL BE MADE ONE AND ONE -HALF INCHES DEEP AT THE REMOVAL LIMITS. CARE SHALL BE EXERCISED IN SAWING AT THE REMOVAL LIMITS SO AS NOT TO CUT THE REINFORCING STEEL IN THE REMAINING SLAB. THE EXISTING
REINFORCING STEEL SHALL BE RETAINED AND EXTENDED INTO THE NEW CONSTRUCTION AS INDICATED ON THE PLANS.
2. USING HANDHELD EQUIPMENT, THE CONCRETE SHALL BE CAREFULLY REMOVED
FOR THE FULL DEPTH OF TH E WALL OR SLAB AND FOR A MINIMUM DISTANCE FORM
THE SAWCUT EQUAL TO THE LONGEST EXTENSION OF THE EXISTING BARS TO BE EXTENDED INTO THE NEW CONSTRUCTION. THIS EXTENSION SHALL BE 30 BAR DIAMETERS, UNLESS OTHERWISE SHOWN.
3. EXISTING REINFORCEMENT SHALL BE CUT TO THE REQUIRED BAR EXTENSION.
4. THE REMAINING CONCRETE MAY BE REMOVED BY ANY SUITABLE METHOD UPON
APPROVAL OF THE ENGINEER, WHO SHALL BE THE SOLE JUDGE OF THE USE OF ANY CONCRETE REMOVAL EQUIPMENT. EXPLOSIVES, WRECKING BALL, OR OTHER
SIMILAR DEVICES, W HICH ARE LIKELY TO DAMAGE THE CONCRETE TO BE LEFT IN PLACE, SHALL NOT BE USED.
Connection Guidelines - June 2018.doc Page 8 of 14
EXHIBIT “B” SAMPLE CONNECTION PLAN AND PROFILE VIEW
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City of Manhattan Beach Subsurface Infiltration Trench and Alternatives Feasibility Study
Appendix J
LACBH Permit References
City of Manhattan Beach Subsurface Infiltration Trench and Alternatives Feasibility Study
Appendix K
LACPW Roads Permit References
COUNTY OF LOS ANGELES
DEPARTMENT OF PUBLIC WORKS
ROAD PERMIT APPLICATION
DATE: SUBDIVISION ID NO. ( DS – PC – PM – TR )
OWNER/APPLICANT: PHONE: ( )
eDAPTS
PROFESSIONAL ID PRINT NAME WET SIGNATURE (REQUIRED)
ADDRESS:
STREET CITY ZIP CODE
FAX: ( ) CELL: ( ) EMAIL ADDRESS:
hereby makes application to perform work within the Public Highway at the following described locations, subject to the provisions required by the Highway Permit Ordinance (Division 1 of Title 16 Los Angeles County Code) as amended or the Municipal Code and city ordinance of the city for which this permit is issued, the attachments hereon specified, AND THE SPECIFIED REQUIREMENTS INDICATED ON THE REVERSE SIDE. In consideration of the granting of this permit, it is agreed by the applicant that the County of Los Angeles and the city wherein the permit work is to be performed and any of their officers or employees, thereof, shall be saved harmless by the applicant from any liability or responsibility for any accident, loss or damage to persons or property, happening or occurring as the proximate result of any of the work undertaken under the terms of this application and the permit or permits which may be granted in response thereto, and that all of said liabilities are hereby assumed by the applicant. It is further agreed that if any part of the work, authorized by this permit, interferes with the future use of the highway by the general public, it must be removed or relocated as designated by the Road Commissioner or Superintendent of Streets at the expense of the permittee or his successor in interest. This permit is void if the permittee is not in compliance with Section 3800 of the labor code. IT IS FURTHER AGREED THAT THE OWNER/APPLICANT IS THE FINANCIALLY RESPONSIBLE PARTY FOR INITIAL DEPOSITS, ADDITIONAL COLLECTIONS, CHARGES AND REFUNDS.
AGENT/CONTACT: PHONE: ( )
PRINT NAME WET SIGNATURE (REQUIRED)
ADDRESS:
STREET CITY ZIP CODE
FAX: ( ) CELL: ( ) EMAIL ADDRESS:
CONTRACTOR: PHONE: ( )
PRINT NAME WET SIGNATURE (REQUIRED)
ADDRESS:
STREET CITY ZIP CODE
FAX: ( ) CELL: ( ) EMAIL ADDRESS:
SITE ADDRESS: ASSESSOR’S PARCEL NO.:
CITY: THOMAS GUIDE PAGE & GRID
LOCATION DESCRIPTION:
SCOPE OF WORK:
PERMITTEE WORK ORDER NO.: USA “DIG ALERT” NO.: FRANCHISE NO.:
Customer/Vendor ID Number Address ID Number
PIPE OR CONDUIT MATERIAL TYPE: SIZE: LENGTH:
EXCAVATION LENGTH: WIDTH: TYPE OF SURFACE:
**PAYER: Print Name Payers Wet Signature
** - PLEASE SIGN ONLY IF YOU AGREE THATTHE OWNER/APPLICANT IS THE FINANCIALLY RESPONSIBLE PARTY FOR ADDITIONAL COLLECTIONS, CHARGES AND REFUNDS PLEASE PROVIDE ALL INFORMATION REQUESTED ON THIS FORM.
THE OMISSION OF ANY INFORMATION, AS REQUESTED ABOVE, MAY RESULT IN A DELAY IN PERMIT PROCESSING.
COMPLETE PERMIT APPLICATION PACKAGES WILL BE PROCESSED IN A TIMELY MANNER.
FOR OFFICE USE ONLY
PERMIT TYPE:
CONSTRUCTION ENCROACHMENT ENCROACHMENT ANNUAL EXCAVATION EXCAVATION ANNUAL ISSUANCE FEE: $ (Non-Refundable) DATE RECEIVED:
PLAN CHECK: $ (Calculated Fee or Actual Cost Deposit) PERMIT TRACKING NO:
INSPECTION: $ (Calculated Fee or Actual Cost Deposit) PERMIT WRITER:
SECURITY DEPOSIT: $ (Refundable) DATE APPROVED FOR ISSUANCE:
TOTAL: $ Payment Type: CASH CHECK (#)
REVISED 02-2011 TWO SIDED DOCUMENT Page 1 of 2
COUNTY OF LOS ANGELES
DEPARTMENT OF PUBLIC WORKS
ROAD PERMIT APPLICATION
REQUIREMENTS FOR OBTAINING A ROAD PERMIT
Complete and sign the permit application. Payment collection will be required prior to permit issuance. Only complete permit application packages will be accepted for review and processing. By signing the permit application, the Owner/Applicant certifies that they are familiar with the requirements of the County Lobbyist Ordinance (Los Angeles County Code Chapter 2.160), and that all persons acting on behalf of the Owner/Applicant have complied with and will continue to comply with this ordinance throughout the application process. Complete and sign acknowledgement that Applicant has read, understands, and agrees to fully comply with the Best Management Practices (BMP) Attachment to this permit per Los Angeles County Code Chapter 12.80 Stormwater and Runoff Pollution Control.
Submit 5 sets of plans showing the location of proposed work; relative to the right of way boundary or the centerline of the road. Pipelines and utilities should be shown parallel to and at a constant distance from the R.O.W or roadway centerline.
o For bridge connections, submit 2 extra sets of plans for Design Division review. o For river crossings, submit 2 extra sets of plans for Watershed Management Division review. Traffic Control Plans are required for street closures or work within major highways and busy intersections. o Submit 2 extra sets of plans for Traffic & Lighting Division review. o Submit 5 traffic control plans, stamped by registered engineer, for Traffic & Lighting Division review. o An actual cost deposit of $500.00 per sheet may be required. Provide proof of General Liability and Workers Compensation insurance. All insurance documents, including the required endorsement form, must name The County of Los Angeles as “Additionally Insured” per current insurance requirements.
If someone other than the property or facility owner applies for a permit; the owner must sign the application and provide a Letter of Authorization detailing who is authorized to apply for and obtain permit. THE OWNER/APPLICANT IS THE
FINANCIALLY RESPONSIBLE PARTY FOR INITIAL DEPOSITS, ADDITIONAL COLLECTIONS, CHARGES AND REFUNDS; UNLESS SPECIFICALLY STATED OTHERWISE IN THE LETTER OF AUTHORIZATION. ( Government Agencies may be exempted from this requirement)
Newly paved or resurfaced roadways shall not be cut within two years from the date of final acceptance. A Flood Control District permit will be required when requested work affects the Flood Control District’s right of way or facility.
The installation of pipelines or utilities within the road right of way requires an individual or private company to obtain the franchise fee owner's consent or provide documentation establishing prior rights over the road dedication. Installation of oil pipelines need approval from the Fire Prevention Division of the Los Angeles County Fire Department at 5823 Rickenbacker Road, Commerce, California 90040. Tel: (323) 890-4132. Utilities installed as part of a subdivision must be signed and stamped “Approved” by the Utility Company. All street crossings shall be made at right angles to the centerline of the roadway. Pipelines and utilities shall not be installed closer than two feet from any other pipeline or utility; three feet from any sewer line. Waterlines should not be installed closer than ten feet from a sewer line. The following minimum depths of cover, below gutter flow line grade, shall be required:
LOCAL STREETS
A. 24" for service pipelines
B. 30" for all pipelines transporting nonhazardous substances C. 30" for electrical facilities
D. 42" for pipelines transporting hazardous substances
MASTER PLAN HIGHWAYS
A. 24" for service pipelines
B. 36" for pipelines transporting nonhazardous substances C. 42" for electrical facilities
D. 42" for pipelines transporting hazardous substances
Excavations deeper than five feet require a Cal OSHA permit.
REVISED 02-2011 TWO SIDED DOCUMENT Page 2 of 2