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Cofferdam and Dewatering Services

Active
State & Local

Contract Overview

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

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This subcontract for Cofferdam and Dewatering Services supports California Department of Water Resources river projects located in Colusa. The selected contractor will be responsible for performing critical dewatering operations for prime contractors, which includes the installation and removal of sheet piling cofferdams and the management of continuous pumping systems to ensure dry and stable work areas within river limits. The solicitation was posted on October 30, 2026, with a response deadline of December 2, 2026. Classified under NAICS code 238910, this opportunity focuses on specialized site preparation and water management to facilitate construction activities in aquatic environments.

General Info

Subcontract for cofferdam and dewatering services for California Department of Water Resources projects.

Place of Performance

Colusa, CA, USA

Set-Aside

NONE

Documents

This scope was carved out of 26-10.

The full solicitation package (7 documents), including the RFP, is on the prime solicitation, not on this scope.

View the prime solicitation

Specification 26-10 (C51700) Butte Slough Outfall Gates Repairs, Sacramento River

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Organization & Contact Information

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AgencyCalifornia Department of Water Resources
ContactsNo contacts available
OfficeN/A
Office AddressN/A
ContactsNo contact information available

Full Description

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Performs dewatering operations for prime contractors on California Department of Water Resources river projects. Installs and removes cofferdams using sheet piling and manages continuous pumping to create dry work areas within river limits. Delivers a dry, stable work area.

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Same NAICS industry code

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NAICS: 541330
New
SLED
Dam Safety Engineering Services – Southern California
Solicitation # 10221501
The California Department of Water Resources is soliciting Statements of Qualifications for as-needed dam safety engineering services to support the Division of Operations and Maintenance in the oversight, inspection, and analysis of structures associated with the State Water Project. The contract period is scheduled from March 2, 2027, through March 1, 2030, with the possibility of two one-year extensions. Primary performance will occur within the Southern and Castaic Field Divisions and Project No. 2426 co-licensee facilities, though up to 30 percent of the contract value may be utilized for facilities in the Oroville, Delta, and San Luis Field Divisions. Key responsibilities include reviewing dam safety issues, developing surveillance monitoring plans and reports, updating supporting technical information documents, and performing inspections of dams and appurtenances such as hydropower and pumping plants. Selection is based on a most qualified process where a panel evaluates firms on their professional experience, education, and training of principals and key personnel, as well as their specific expertise in dam performance surveillance. Qualified firms must submit their SOQs by November 17, 2026, including a mandatory Generative AI disclosure and a Potential Qualified Firms Certification Sheet. The resulting agreement will utilize individual task orders to define specific deliverables and costs. Administrative requirements include compliance with prevailing wage laws, ADA accessibility, and a payment structure where undisputed invoices are paid within 45 days following verbal acceptance of work by the contract manager.
Engineering Services

POSTED

about 22 hours ago

DEADLINE

in 17 days
View Details
NAICS: 237110
New
SLED
Specification 26-10 (C51700) Butte Slough Outfall Gates Repairs, Sacramento River
Solicitation # 26-10
The California Department of Water Resources is soliciting sealed bids for Contract No. C51700, Specification 26-10, to perform repairs on the Butte Slough outfall structure at the confluence with the Sacramento River in West Sacramento. The project has an estimated cost between $4,700,000 and $6,600,000 and involves a comprehensive scope of in-water and electrical work. Key deliverables include the replacement of the inlet catwalk, repair or replacement of inlet slide gates, installation of seven Department-furnished slide gates and electrical actuators, and the installation of steel piles and piers. Additional requirements include selective demolition, earthwork, concrete rock slope protection, road repair, and the construction of a control equipment shed. Bids are due by 2:00 PM on December 2, 2026, and will be awarded to the lowest responsible and responsive bidder. Prospective prime contractors must hold a Class A license and obtain special prequalification from the Department, which includes a mandatory safety performance review and a statement of experience demonstrating proficiency with temporary steel sheet-pile cofferdams and dewatering in artesian aquifers. Bidders must provide bid security equal to at least 10 percent of the total bid and furnish performance and payment bonds upon award. The project is subject to Department of Industrial Relations registration, prevailing wage enforcement, and strict environmental compliance, including adherence to U.S. Army Corps of Engineers permits and a Dewatering and Fish Rescue Plan. Performance is further restricted to periods of low rainfall or dry weather.
Water and Sewer Line and Related Structures Construction

POSTED

1 day ago

DEADLINE

in about 1 month
View Details

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