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ADOPT A RESOLUTION TO APPROVE FINDINGS AND AWARD A CONTRACT TO HALEY & ALDRICH, INC. FOR ENGINEERING DESIGN SERVICES AT THE DELTA WATER INTAKE PUMP STATION
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RECOMMENDATION
It is recommended that the City Council approve a resolution to:
1. Approve findings pursuant to Stockton Municipal Code section 3.68.070 which support and justify an exception to the competitive bidding process.
2. Award a contract to Haley & Aldrich, Inc. of Walnut Creek, CA, in the amount of $158,100, to design erosion control measures at the Delta Water Treatment Plant Intake Pump Station (Exhibit 1 to the Resolution).
It is also recommended that the City Manager be authorized to take appropriate and necessary actions to carry out the purpose and intent of this resolution.
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Summary
The Delta Water Treatment Plant Intake Pump Station (IPS) is located in the Sacramento - San Joaquin River Delta at the end of Empire Tract Road. The facility is maintained by the Municipal Utilities Department (MUD) and provides raw water supply to the treatment plant via a 13-mile long pipeline. A common condition in the Delta is the potential for land settlement due to the unique geology of the underlying sediments. Sediments below a portion of the IPS have and will continue to settle at a decreasing rate for the foreseeable future. Past projects have helped improve settlement impacts.
If approved by the City Council, this action would authorize a contract to complete a geotechnical study and provide engineering design services that will be incorporated into various project improvements.
It is recommended that the City Council adopt a resolution approving the findings and awarding an engineering services contract, in the amount of $158,100, to Haley & Aldrich, Inc., to design erosion control measures at the Delta Water Intake Pump Station.
DISCUSSION
Background
The MUD operates and maintains the Delta Water Supply Intake Pump Station (IPS) located west of the City of Stockton on the south bank of Empire Tract. Dedicated in 2012, the intake facility diverts water from the Sacramento-San Joaquin River Delta for treatment and distribution to the City of Stockton.
The IPS was built on top of an existing levee that was made taller and wider using specially placed and compacted gravel and soil. Beneath the levee is a layer of soft, compressible peat soil (remains of ancient wetlands) that is about 10 to 25 feet thick. This soft layer begins about 10 feet below the top of the levee. Areas that are not supported by deep foundation piles have experienced noticeable settlement of the ground since IPS construction was completed. The decision was made during the initial IPS project design that only a portion of the site would be pile supported due to overall project costs and budget restrictions.
Since 2012, MUD has continued to address settlement impacts thru contracted studies, evaluation of settlement effects, completion of design improvements, and has also completed various projects to remediate impacts.
Present Situation
On August 14, 2025, the City issued a Request for Proposals (RFP) and posted it on the City’s Bid Flash website. In addition, email notifications containing a brief project description were distributed to 12 design consulting firms.
On August 25, 2025, the City conducted a mandatory pre-proposal site walk, which was attended by only one design firm.
On September 18, 2025, the City Clerk received one proposal and a sealed design cost from Haley & Aldrich, Inc.
The selection committee evaluated the proposal based on the firm’s understanding of the project, experience with similar work, qualifications of the proposed team, and overall project approach. The proposal submitted by Haley & Aldrich, Inc. met the established evaluation criteria.
Staff recommend that the City Council adopt a resolution approving the findings and awarding a contract to Haley & Aldrich, Inc. for engineering design services related to erosion control measures at the Delta Water Intake Pump Station.
Findings
Pursuant to the Stockton Municipal Code (SMC) section 3.68.070, the City Council may approve findings which support and justify an exception to the competitive bidding process. The following findings support and justify an exception:
1. The City lacks technical expertise in hydrogeology and engineering to develop the needed design improvements to help remediate settlement impacts at the IPS.
2. The scope of services requires an engineering firm with expertise in designing erosion control measures and capability to conduct a comprehensive geotechnical investigation.
3. Use of the RFP process is appropriate for this contract because it relies on the evaluation of professional qualifications and performance as the basis for selection of a vendor. Use of these criteria helps ensure selection of a vendor that will provide the highest quality professional service which is in the public interest.
4. The Haley & Aldrich, Inc. contract proposal qualifies the necessary experience, is regular in all aspects and meets the required criteria.
FINANCIAL SUMMARY
There are sufficient funds available in the MUD CIP Account No. 6518-000-800007-600-602-00-65-000-000 under Project No. UH21002 to award a contract to Haley & Aldrich, Inc. of Walnut Creek, in the amount of for $158,100 to design erosion control measures at the Delta Water Intake Pump Station.
This action has no impact on the General Fund, or any other unrestricted funds.