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City of Modesto, CA·California

On-Call Hydrogeological Services

Closes 5/20/2026$50k – $500kRequest for Qualification
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Description

The City of Modesto is seeking on-call hydrogeological services to support its water supply challenges, including groundwater management and water quality assessments. The selected consultant will provide services such as water quality assessments, well evaluations, and aquifer storage and recovery program development. The consultant will work on an as-needed basis and will be required to submit a detailed written proposal, including a scope of services, project schedule, and estimate of costs, prior to commencing work on each project. The City will select two to three firms to establish on-call agreements with, and the agreement will have a term of one year with two optional one-year extensions. The estimated annual amount for the agreement is $100,000, with a total amount not to exceed $300,000 over three years. Some key points to consider: • The City's water supply is met by two sources: treated surface water and groundwater from approximately 75 operational wells. • The City faces significant water supply challenges, including regional competition for limited groundwater, drought impacts, and loss of wells from contamination. • The selected consultant will be required to have experience in hydrogeological engineering services and will need to demonstrate their ability to provide professional services for the type of projects outlined. • The City will evaluate the Statements of Qualifications based on factors such as experience, analysis, and general considerations, including the firm's experience, capabilities, and understanding of community social relationships.

Attached files

The solicitation documents live at the source — open the bid source above to download them.

Contact

David Felix(Associate Engineer)

[email protected]

(209) 577-5488

Key dates

Opened
4/14/2026
Questions due
5/6/2026
Closes
5/20/2026
Duration
1 year, with two optional 1-year extensions, so potentially 3 years

Last updated

Details

Type
Request for Qualification
Industry
Environmental Services
NAICS
541620

Budget estimate

$50,000 – $500,000

The estimated annual amount for the agreement is $100,000, with a total amount not to exceed $300,000 over three years. This suggests that the City is expecting to pay a significant amount for the on-call hydrogeological services. However, the actual budget could vary depending on the scope of work and the number of projects assigned to the consultant. Factors that may influence the likely payment range include the complexity of the projects, the level of expertise required, and the amount of time and resources needed to complete the work. Based on this information, a reasonable estimate for the budget range could be between $50,000 and $500,000, assuming that the consultant will be working on a variety of projects with varying levels of complexity and scope.

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