This Subcontract opportunity from California was posted on August 13, 2026. The submission period has ended. Browse the details below for market research, or find similar active opportunities.

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Earthwork and Vault Construction

Closed

State & Local

Submission Closed09/29/2026, 02:00:00 PM PDT

Contract Overview

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

Active Opportunities Like This One

NAICS: 237990

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Request for Quote for The Recharge Master Plan Update at Montclair Basin

Solicitation # request-quote-recharge-master-plan-update-montclair-basin

Bosco Constructors, Inc. is requesting quotes from certified and qualified DBE, SBA, and MBDA subcontractors and suppliers for the Recharge Master Plan Update at Montclair Basin in California. The scope of work involves improvements to Basin 2 and Basin 3, specifically requiring services for mobilization, water control, bypass and dewatering, the installation of inlet and outlet structures, diversion piping, valves, fittings, riprap, grading, backfill, restoration, and general cleanup. This solicitation is set aside for various small business categories, including SBA certified Veteran Owned, Service-Disabled Veteran Owned, Women-Owned, and HUBZone Small Businesses. Interested parties must submit their responses by November 23, 2026. Primary coordination for this project is handled by Rafael Fonseca Jr.

Bosco Constructors, Inc.

POSTED

DEADLINE

Imperial Irrigation District – East Highline Reservoir

Solicitation # imperial-irrigation-district-east-highline-reservoir

Granite Construction Company is seeking quotes for the Imperial Irrigation District East Highline Reservoir project located in California. This solicitation is specifically open to qualified socioeconomic firms, including certified Small Business, Women-Owned Small Business, Minority Business, and Disadvantaged Business Enterprises. The scope of work is extensive, covering a wide array of materials and services such as crushed stone, sand, gravel, concrete, reinforcing steel, and lumber, as well as specialized labor for clearing, grading, excavation, erosion control, and electrical signals. Additional requirements include professional services for environmental consulting, materials testing, and land surveying, along with a comprehensive need for various trucking and equipment rentals including bottom dump, flat bed, and water trucks. Interested parties must submit their responses by December 2, 2026. Primary inquiries and submissions should be directed to Andrew Burk at Granite Construction Company.

Granite Construction Company

POSTED

DEADLINE

ADVANCE NOTICE: Rail Modernization Program

Solicitation # WMATA-0000010871

The Washington Metropolitan Area Transit Authority has issued an advance notice for the Rail Modernization Program under solicitation number WMATA-0000010871. This solicitation is categorized under NAICS code 237990, which pertains to other heavy and civil engineering construction. The notice was posted on November 13, 2026, and the deadline for responses is set for September 30, 2027. Interested parties can find further details and manage bids through the official WMATA supplier portal.

Washington Metropolitan Area Transit Authority

POSTED

DEADLINE

Foundation & Site PreparationThis subcontract for Foundation and Site Preparation supports prime contractors on DLA Weapons Support ASC Industrial Plant Equipment projects. The scope of work involves comprehensive ground-level preparation, including the demolition of existing structures, excavation, debris removal, and the application of foundation fill. Additionally, the contractor is responsible for conducting geotechnical surveys to assess soil conditions and delivering certified machine foundations. All operations must strictly adhere to EM 385-1-1 and UFC 3-301-01 standards. The project falls under NAICS code 237990 and is managed by the Department of Defense. Interested parties must submit their responses by the deadline of December 14, 2026.

DLA WEAPONS SUPPORT ASC INDUSTRIAL PLANT EQUIPMENT

POSTED

DEADLINE

General Building and CivilsThis subcontract agreement involves the provision of general building and civil engineering services for Northern Trains Limited. The scope of work focuses on supporting prime contractors through the execution of earthworks, concrete pouring, structural repairs, and general masonry to deliver completed civil works and structural building components. The contract is categorized under NAICS code 237990 and was posted on November 13, 2026. It establishes a framework for specialized construction activities essential to the infrastructure projects managed by Northern Trains Limited.

Northern Trains Limited

POSTED

DEADLINE

Dredged Material Containment Area (DMCA) O&M Construction IDC

Solicitation # W912HN27RA006

POSTED

DEADLINE

Y--NAMA 326209 East Potomac Seawall Design Build

Solicitation # 140D0427RP001

Ibc Acq Svcs Directorate (00004)

POSTED

DEADLINE

USACE SPK DBB Construction - LAR C3B South - Sacramento, CA

Solicitation # W9123827BA002

The United States Army Corps of Engineers Sacramento District anticipates a design-bid-build construction requirement for the Lower American River Contract 3B South project in Sacramento, California. This effort focuses on erosion control and levee strengthening along approximately 1.5 miles of the south bank, extending from Watt Avenue upstream toward Mayhew Drain. The scope of work includes constructing launchable rock toes and trenches, installing bank protection and tie-backs, regrading riverbank slopes, and placing instream wood structures on planting benches. The project is organized into four phases: tree clearing and transplant, two years of erosion protection, and a final greening phase. In-water work is restricted to the window between July and October. The government estimates a target price range between 45 million and 60 million dollars, with a construction period of 510 calendar days. The requirement is anticipated to be a small business set-aside under NAICS 237990, solicited as a firm-fixed price contract via an Invitation for Bids in October 2026. Key compliance requirements include CMMC Level 1 Self Certification, E-Verify participation, and the requirement for the successful offeror to enter into a Project Labor Agreement. Bidders must be registered in both SAM and the Procurement Integrated Enterprise Environment. Notably, the project is subject to pending litigation that currently prohibits ground or vegetation disturbing activities; therefore, the government reserves the right to delay or cancel the solicitation without liability.

W075 Endist Sacramento

POSTED

DEADLINE

Arcadia Wet Well Rehabilitation_Amendment 0004

Solicitation # W912BV26RA033

Solicitation W912BV26RA033 is a firm fixed price contract issued by the U.S. Army Corps of Engineers, Tulsa District, for the rehabilitation of wet well low flow gates at Arcadia Dam in Oklahoma County, Oklahoma. The project magnitude is estimated between $1,000,000 and $5,000,000 with an estimated duration of 500 calendar days. The scope of work includes the fabrication of two structural steel bulkheads, the removal and disposal of existing low flow gates in the north wet well, and the installation of new ductile cast iron low flow inlet and low flow gates. Additionally, the contractor must replace all angle H frames and structural bolts in both the north and south wet wells. Optional tasks may include similar removal and installation services for the south wet well and the procurement of six additional ductile cast iron inlet gates. Award will be determined using the Lowest Price Technically Acceptable (LPTA) process, where proposals are evaluated for acceptability based on non-cost factors including past performance, key personnel, and performance capability. To be technically acceptable, offerors must demonstrate experience with at least one to two recent relevant projects exceeding $250,000 in value involving hydraulic steel structures, water control gates, or heavy lifting in confined environments. All key personnel must be U.S. citizens or documented U.S. workers. The contractor is required to implement a three-phase control system under a Contractor Quality Control Plan and adhere to EM 385-1-1 safety requirements. Proposals must be submitted electronically via the Procurement Integrated Enterprise Environment (PIEE) by November 16, 2026, at 2:00 PM CDT.

POSTED

DEADLINE

Veterans Parkway Fitness Station Replacement Project (D-933)

Solicitation # E1312-26C

The Veterans Parkway Fitness Station Replacement Project (D-933), solicitation E1312-26C, is a public works project managed by the City of Manhattan Beach Public Works Department. Located at 1104 N. Valley Drive, the scope of work includes mobilization, demolition, grading, and erosion control to replace existing exercise equipment and pads. Key deliverables include the installation of City-provided exercise equipment with reinforced PCC foundations, the replacement of a drinking fountain, the installation of signage, and the reconstruction of two ADA parking stalls using permeable concrete. The project also involves the restoration of irrigation, planting, and water quality improvements. Work must be performed in strict accordance with the California Building Code, City/County standards, and the Municipal Separate Storm Sewer System National Pollutant Discharge Elimination System permit. The project is scheduled for an anticipated award in January 2027, with a total duration of 60 working days, split between 20 days for preconstruction and 40 days for construction. The contract will be awarded to the lowest responsive and responsible bidder, with evaluations based on financial standing, general competency, and bid accuracy. Bidders must submit their proposals via the OpenGov portal by December 10, 2026, including a signed Contractor's Statement, references, a noncollusion declaration, and evidence of signing authority. Required bonding includes a bid bond of 10%, performance and payment bonds at 100% of the contract price, and a one-year warranty bond of 10%. As a public work, the project is subject to Labor Code Section 1770 et seq., requiring all contractors and subcontractors to pay prevailing wages as determined by the Department of Industrial Relations.

POSTED

DEADLINE

Earthworks & Site PreparationThis subcontract for Earthworks and Site Preparation involves performing critical site clearing and excavation services for prime contractors on UNHCR office projects located in Maroua, Cameroon. The scope of work focuses on preparing the site for foundation pouring through the execution of brush clearing and stripping across a 520 square meter footprint, along with 150 cubic meters of pit excavations for footings. Additionally, the contractor is responsible for 110 cubic meters of trench excavations for ground beams and buried networks, as well as 210 cubic meters of selected backfilling utilizing layered compaction. Classified under NAICS code 237990, this project ensures the structural readiness of the land to support subsequent construction phases for the agency.

POSTED

DEADLINE

Site Earthwork and Utility AbandonmentThis subcontract for Site Earthwork and Utility Abandonment involves performing excavation, site grading, and utility abandonment for prime contractors on NAVFAC and US Navy projects at NBK Bangor. The scope of work includes removing existing utility structures to 900mm below grade, filling abandoned piping and gravity systems under pavements with flowable fill, and restoring grassed areas through topsoil application and seeding. The project requires strict adherence to UFGS 31 23 00.00 20 through coordination with the Designer of Record, and any sheeting or dewatering activities must be supported by PE-certified plans. Managed by the Bristol Alliance of Companies, the contract falls under NAICS code 237990 and mandates the delivery of a fully graded site and restored landscape. Responses are due by December 5, 2026.

Bristol Alliance of Companies

POSTED

about 20 hours ago

DEADLINE

in 21 days

AI Contract Overview

This subcontract for Earthwork and Vault Construction supports water infrastructure projects for the Metropolitan Water District of Southern California in Highland, California. The scope of work involves demolition, clearing, grubbing, and excavation for concrete pads and underground vaults, as well as the installation of fabricated steel-plate K-pipe and High-Density Polyethylene pipe. The contractor must adhere to Division 2 Site Work specifications and strict invasive mussel prevention standards to deliver a fully excavated site with installed piping and vault structures. This opportunity was posted on August 13, 2026, with a response deadline of September 29, 2026, under NAICS code 237990.

General Info

Subcontract for earthwork, vault construction, and piping for California water infrastructure projects.

Agency

The Metropolitan Water District of Southern California

NAICS

237990 - Other Heavy and Civil Engineering Construction

Place of Performance

Highland, CA, 92346, USA

Set-Aside

NONE

Documents

This scope was carved out of 2049.

The full solicitation package (8 documents), including the RFP, is on the prime solicitation, not on this scope.

View the prime solicitation

Inland Feeder/San Bernardino Valley Municipal Water District (SBVMWD) Foothill Pump Station Intertie, Stage 1

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Timeline

PhaseClosed

PostedAug 13

subcontract

Response DeadlineSep 29

Deadline has passed

Submission Closed

09/29/2026, 02:00:00 PM PDT

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Organization & Contact Information

AgencyThe Metropolitan Water District of Southern California

ContactsNo contacts available

OfficeN/A

Organization / AgencyThe Metropolitan Water District of Southern California

Office AddressN/A

ContactsNo contact information available

Full Description

Performs demolition, clearing, grubbing, and excavation for underground vaults and concrete pads for prime contractors on Metropolitan Water District of Southern California water infrastructure projects. Installs High-Density Polyethylene (HDPE) pipe and fabricated steel-plate K-pipe. Adheres to Division 2 Site Work and invasive mussel prevention standards. Delivers an excavated site with installed piping and vault structure.