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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Prepared by: |
Elba Mijango, Associate Engineer; Somporn Boonsalat, Deputy Director of Engineering |
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Date: |
September 1, 2026 |
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Subject: |
Notice of Completion - Nile Garden Well 30 Water Supply Project CIP No’s. 21026 & 21034 |
Recommendation:
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Adopt a resolution accepting all improvements for the Nile Garden Well 30 Water Supply Project CIP No’s. 21026 & 21034 as complete, authorizing the City Clerk to file the Notice of Completion 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 City of Manteca (City) and the Manteca Unified School District (MUSD) collaborated to secure a $9.1 million grant from the State Water Resources Control Board (State Water Board) to construct Well 30 and all ancillary equipment needed to provide drinking water to Nile Garden Elementary School as part of the Nile Garden Well 30 Water Supply Project (CIP 21026 & 21034) (Project).
The Project is comprised of two phases. Phase 1 Drilling included the drilling of Well 30 and was accepted by Council on September 16, 2025. Phase 2 Equipping included the installation of the well pump, building, arsenic treatment system, and a pipeline to Nile Garden Elementary School.
On June 20, 2023, the City awarded the Phase 1 contract to Nor-Cal Pumping Services in the amount of $927,853.
On March 5, 2024, the City awarded T&S Construction, Inc. (T&S) the Phase 2 contract for an amount of $4,925,000.
On June 16, 2025 the State Water Board increased the Change Order Contingency grant amount from $569,532 to $1,269,532, bringing the grant total to $9,074,888.
The Project was constructed in general conformance with the conformed plans and specifications.
The Phase 2 work included a total of seven contract change orders (CCOs) that, when combined, resulted in a cost increase in the amount of $811,108.03 to the original contract amount. The change order work included the following:
• Design changes to the building foundation were required due to poor on-site soil conditions. These foundation changes required changing the location of electrical cabinets and conduit locations under the building foundation.
• New project sign to meet updated requirements from the State Water Board.
• Changing pipe material from PVC to ductile iron in order to meet San Joaquin County pipeline depth requirements for piping located within County right-of-way; this is the 12” pipeline that provides water to Nile Garden Elementary School.
• Repairing shoulder backing and performing an additional 1-in grind and overlay along the 12” pipeline alignment to meet San Joaquin County Standards.
• Various project credits for plumbing changes and for a tie-in modification of the 12” pipe at Union Road.
• Changes to the installation of a manhole that needed to be deeper to meet field conditions.
• Updates to onsite programming to ensure the new Well 30 system matched existing City systems.
• Balancing change order to reflect project payment withholdings due to delays in meeting the substantial completion date of October 23, 2025.
The final construction cost is $5,736,108.03 and the contractor has signed the final payment certification (Attachment 4). The balance of the overall funding provided for the engineering and construction management costs associated with both phases of the Project.
The remaining retention totaling approximately $142,138.50 will be released to the contractor no sooner than 45 days after filing the Notice of Completion at the San Joaquin County Recorder’s Office.
Fiscal Impact:
There are sufficient funds in the Water Operating Fund (Fund 680) and Water Improvement Fund (Fund 690) in CIP 21026 & 21034 budgets to satisfy this action. These funds will be reimbursed by the grant.
Documents Attached:
1. Attachment 1 - Resolution
2. Attachment 2 - Location Map
3. Attachment 3 - Notice of Completion
4. Attachment 4 - Final Payment Certification