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Old and Middle River Pump Stations Water Quality Monitoring Instrumentation Improvements Project

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State & Local

Contract Overview

Solicitation details, issuing organization, response deadlines, documents, and interested companies for this government contract opportunity.

AI Contract Overview

The Contra Costa Water District will upgrade water quality monitoring equipment at its Old River and Middle River intakes in the Sacramento-San Joaquin Delta to mitigate risks posed by invasive golden mussels, which currently clog the existing two-inch piping used for sampling. The project involves installing two multiparameter sondes—one at each intake—encased in six-inch diameter HDPE stilling wells mounted on existing concrete cantilever platforms facing the fish screens. These larger-diameter wells will drastically reduce the likelihood of blockage and improve accessibility for maintenance. Data collected by the sondes will be transmitted via new and existing conduits back to the electrical buildings at each site, ensuring continuous, reliable water quality monitoring without disruption to current operations. Construction is scheduled for a three-month period between June and August 2026, with all activities confined to previously disturbed areas on CCWD property, including paved roads and parking zones within the pump station boundaries. No vegetation or tree removal, ground disturbance, or impact to river banks or beds is anticipated. Equipment installation will be performed from the cantilever platforms on land and via boat or barge in the water directly below, using crew trucks, a vessel, and power tools. The project will not affect natural resources or any known cultural or historic sites, and all equipment laydown and staging will occur within existing developed areas, minimizing environmental footprint.

General Info

Upgrade water monitoring equipment at two intakes to prevent mussel blockage, install new sondes, no environmental impact.

Agency

California → Contra Costa Water District

NAICS

237990 - Other Heavy and Civil Engineering ConstructionView NAICS

Place of Performance

Set-Aside

NONE

Documents

(2)

Filed CEQA Notice of Exemption - Old and Middle River WQ Instrumentation Project

PDF•notice-of-exemption

Notice of Exemption - Old and Middle River Pump Stations Water Quality Instrumentation Project

PDF•notice-of-exemption

AI Contract Breakdown

Uniform Contract Format

Timeline

PostedJun 12

forecast

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Organization & Contact Information

AgencyCalifornia → Contra Costa Water District

Contacts1 person available

OfficeN/A

Organization / Agency

California → Contra Costa Water District

Office AddressN/A

Contacts

Cody EricksenAssociate Planner

contact@example.gov

+1 (555) 000-0000

Full Description

This Project consists of the installation of upgraded water quality monitoring equipment at CCWDs Old River and Middle River intakes in the Sacramento-San Joquin Delta. Currently, water samples at these intakes are pumped out of wet wells that pass through two-inch diameter piping, which is at high risk of being blocked by the spread of invasive golden mussels (Limnoperna fortunei). The purpose of this project is to install new water quality monitoring equipment that will provide more reliable monitoring data and will decrease the risk of being blocked by golden mussels. A total of two multiparameter sondes will be installed, one at Old River and one at Middle River. Each sonde will be incased in a six-inch diameter HDPE pipe stilling well and mounted to the existing concrete cantilever platforms located in front of the fish screen at each intake, where they will extend into the water to collect water quality data. These larger diameter stilling wells will significantly decrease the risk of clogging due to golden mussels and will be easier to access and maintain. See Figure 1 for a Project vicinity map and Figures 2 and 3 for Project location maps. Data from these sondes will be transmitted back to the electrical building at each site through new and existing conduits. The Project is expected to take three months, with construction occurring between June and August of 2026. Equipment laydown and vehicle staging will occur in previously disturbed areas, such as paved roads and parking areas, within the boundaries of the pump stations on CCWD property. The following types of equipment are expected to be present at the project site: crew trucks, a boat or barge, and power tools. Project activities will occur in previously developed and disturbed areas on CCWD property. No vegetation removal or tree removal will occur. No ground disturbance will occur, and there will be no impact to the banks or beds of the rivers at either intake. Equipment installation will occur from land via the concrete cantilever platforms and from a boat or barge in the water immediately below the platform. The Project is not anticipated to adversely affect natural resources or areas of known cultural or historic resources.