City Council Agenda
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Memo to: |
Manteca City Council |
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From: |
Michael Selling, Assistant Director of Engineering/City Engineer |
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Date: |
March 17, 2026 |
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Subject: |
Storm Drain Zone 36/39 Improvements Project Phase 1 Outfall Construction Located Between Woodward Avenue Near Aplicella Court and Approximately 3,000 feet West of Woodward Avenue |
Recommendation:
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Adopt a resolution approving the Plans and Specifications for the Storm Drain Zone 36/39 Improvements Project Phase 1 Outfall Construction located at the west end of the City limits between Woodward Avenue near Aplicella Court and approximately 3,000 feet west of Woodward Avenue; authorizing a Call for Bids; and authorizing the City Manager or Designee to take all appropriate actions necessary to carry out the purpose and intent of the resolution.
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Background:
The Storm Drain Zone 36/39 Improvements Project (CIP 20004)(Project) is designed to convey stormwater flows south of State Route 120 to a new surface water discharge into the San Joaquin River at the west end of the City of Manteca (“City”) limit.
Phase 1, this agenda item, includes construction of a new outfall structure on the San Joaquin River at the former Oakwood Lake Water District corporation yard and installation of a forty-eight-inch (48”) force main that will carry stormwater runoff along the toe of the Reclamation District 17 (“RD 17”) levee from the pump station near Woodward Avenue and Applicella Court to the new outfall structure.
Future phase work, not part of this agenda item, will include completion of the sixty-six-inch (66”) gravity storm drain line within Woodward Avenue, which new development has been conditioned to construct to property owned by RD 17 on Aplicella Court and a stormwater pump station.
The outfall structure on the San Joaquin River has a narrow window of construction in accordance with the environmental permitting that would preclude in-water construction on the outfall from November 1st through July 31st. A future phase will include the pump station required to pump the 66” gravity line storm water thru the 48” force main to the outfall structure/terminal discharge point.
On January 21, 2020, the City Council authorized the expenditure and execution of an Agreement for Professional Services with Dewberry in an amount not-to-exceed $1,191,268 for the Project’s Engineering, Environmental, and Permitting Services.
On December 28, 2021, the Initial Studies/Mitigated Negative Declaration and Mitigation Measures Reporting Program was filed with the State Clearing House (SCH Number 2021090183).
On January 5, 2022, the City Council authorized an increase in expenditure and execution of Amendment No. 1 (C2020-10-A1) to the Agreement for Professional Services with Dewberry up to $1,384,868 for additional permitting assistance and other related efforts.
On December 22, 2022, the City Council authorized the execution of Amendment No. 2 (C2020-10-A2) to the Agreement for Professional Services with Dewberry extending the Time of Performance to December 31, 2023, due to the COVID-related delays in State and Federal permits application processing.
On November 21, 2023, the City Council authorized the execution of Amendment No. 3 (C2020-10-A3) to the Agreement for Professional Services with Dewberry extending the Time of Performance to December 31, 2025, due to protracted State and Federal permit reviews and processing.
On March 4,2024, the City received approval of Permit No. 19644 from the Central Valley Flood Protection Board to install the outfall through the east bank levee of the San Joaquin River.
On April 5,2024, the City received approval of the Streambed Alternation Agreement Permit No. SJN-38517-R2 from the California Department of Fish and Wildlife.
On December 16, 2025, the City Council authorized the execution of Amendment No. 4 (C2020-10-A3) to the Agreement for Professional Services with Dewberry to increase the expenditure authority up to $1,591,318 to revise the project plans and specifications to meet new San Joaquin Area Flood Control Agency requirements and extend the Time of Performance to June 30, 2027, to allow for design support during construction.
Fiscal Impact:
There is no fiscal impact associated with this action.
Documents Attached:
1. Attachment 1 - Resolution
2. Attachment 2 - Location Map
3. Attachment 3 - Invitation to Bid
4. Attachment 4 - SCH Number 2021090183