This Subcontract opportunity from California was posted on June 10, 2025. The submission period has ended. Browse the details below for market research, or find similar active opportunities.

Top

Supplemental Work for Differing Site Conditions

Closed

State & Local

Submission Closed08/06/2025, 05:00:00 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

New

ALTA, RIVERVIEW, AND KINGS CANYON HIGH WELL DRILLING PHASE

Solicitation # alta-riverview-kings-canyon-high-well-drilling-phase

The Kings Canyon Unified School District is seeking bids for Project No. 1000316-001C, which involves the well drilling phase for Alta, Riverview, and Kings Canyon High schools. The project will be executed across multiple locations in California, specifically within Reedley, Parlier, Dinuba, and Fresno. This solicitation is categorized under NAICS code 237990 and is managed through Anthony J. Prieto Water Well Drilling, Inc. This opportunity is designated as a set-aside for various small business categories, including SBA certified Veteran Owned, Service-Disabled Veteran Owned, Women-Owned, and HUBZone Small Businesses. The solicitation was posted on November 8, 2026, with a response deadline of November 10, 2026. Interested parties may contact Jennah Castagna for further information regarding the submission process.

Anthony J. Prieto Water Well Drilling, Inc.

POSTED

DEADLINE

Site Compliance and Improvements - Patton Landing

Solicitation # site-compliance-improvements-patton-landing

The State of California Department of General Services is seeking bids for the Site Compliance and Improvements project at Patton Landing, located in Carnelian Bay, Placer County. Identified by Project Number 13891 and Event ID 0000040533, this solicitation focuses on site compliance and infrastructure enhancements under NAICS code 237990. This opportunity is specifically set aside for SBA certified Service-Disabled Veteran Owned Small Businesses and Disadvantaged Business Enterprises. Interested parties must submit their responses by the deadline of November 10, 2026. Primary coordination for this project is managed through Nayvi Waite at Resource Development Company LLC.

Resource Development Company LLC

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 and signal installation. Additional requirements include professional services for environmental consulting, materials testing, and land surveying, along with a comprehensive need for various trucking and hauling services. Interested parties must submit their responses by December 2, 2026. Primary inquiries and submissions should be directed to Andrew Burk via the provided contact information.

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. Interested parties have until September 30, 2027, to submit their responses. The procurement process is being managed through the agency's supplier portal, and the notice serves as a preliminary announcement for the upcoming modernization efforts within the rail system.

Washington Metropolitan Area Transit Authority

POSTED

DEADLINE

Ellsworth Meadows Golf Course Hole 17 Retaining Wall Installation, Phase 2

Solicitation # 49915

The City of Hudson, Ohio, is soliciting bids for Phase 2 of the Ellsworth Meadows Golf Course Hole 17 Retaining Wall Installation. The project involves the installation of approximately 620 linear feet of retaining wall along the east side of hole 17, including associated clearing, grubbing, pruning, and construction layout staking. Work must adhere to the City of Hudson Engineering Standards for Infrastructure Construction and the State of Ohio Department of Transportation Construction and Material Specifications dated January 1, 2023. Bids are to be submitted on a unit price basis via the Bid Express website by December 1, 2026. Submissions must include a completed bid form, a list of proposed subcontractors, and bid security in the form of a Bid Guaranty and Contract Bond or a certified check/letter of credit for 10% of the bid value. The successful contractor will be required to provide a performance bond, a payment bond, and three specific insurance policies. Payment is processed monthly through an Application for Payment reviewed by the project engineer, who also serves as the judge of the work's acceptability. All labor must comply with prevailing wage rates, and contractors must provide evidence of authority to do business in the state of Ohio.

POSTED

DEADLINE

Drainage Improvement and InstallationThis subcontract involves the execution of drainage improvement and installation works for UNESCO Office in Afghanistan projects located in the Daudi valley. The contractor is responsible for performing critical infrastructure tasks, including excavation, grading, and the installation of drainage channels or pipes. Additionally, the scope requires the integration of these drainage systems with stone masonry structures to ensure a fully functional system that adheres to all provided specifications. The project is categorized under NAICS code 237990 and is managed by UNESCO. All work is to be performed on-site in Afghanistan, focusing on delivering a completed drainage network that meets the technical requirements of the prime contractor and the overarching project goals.

POSTED

DEADLINE

Travaux de génie civil, hydrauliques et l installation d un système solaire

Solicitation # UNDP-DJI-00276

The UNDP Djibouti is seeking bids for solicitation number UNDP-DJI-00276 to execute civil engineering, hydraulic works, and the installation of a solar photovoltaic system for the E-60 desalination unit in Ripta. The scope of work includes constructing a protective slab and shelter, installing reservoirs, pumps, piping, and water distribution points, as well as implementing brine management systems and site security measures. Additionally, the contractor is responsible for the sizing, supply, connection, and testing of the electrical and solar power systems. Interested parties must submit their offers electronically through the Quantum portal. To ensure receipt of any updates regarding offer requirements, bidders are encouraged to create a draft response in the system. New users must register a profile via the provided UNDP procurement links, while existing users should utilize their current credentials. All inquiries and official submissions should be managed through the system's messaging function and portal to be considered by the UNDP Procurement Unit.

POSTED

DEADLINE

Specialized Civil Support for Electrical UtilitiesThe Specialized Civil Support for Electrical Utilities subcontract involves providing critical excavation and civil engineering services for prime contractors on Port of Stockton electrical projects. The scope of work includes trenching, boring, and excavation, with specific requirements for executing railroad crossings, utility locating, and dewatering. Additionally, the contractor is responsible for providing traffic control and confined-space entry services to ensure the delivery of prepared trenches and conduits ready for electrical installation. To successfully execute this contract, the provider must possess specialized equipment, including excavators and boring machines, and maintain necessary railroad flagging certifications. Interested parties must submit their responses by the deadline of December 16, 2026. This opportunity falls under NAICS code 237990 and is centered on supporting infrastructure development within the Port of Stockton in California.

POSTED

DEADLINE

Bulkhead Stabilization and Erosion Control InstallationThis subcontract for Bulkhead Stabilization and Erosion Control Installation involves performing specialized stabilization work for prime contractors on Texas Parks and Wildlife Department projects located at Lake Livingston State Park. The scope of work includes the installation of temporary stabilization measures, the implementation of earthwork, and the deployment of turbidity curtains to prevent sediment migration. To ensure environmental protection, the contractor must utilize equipment mats to minimize soil disturbance and take necessary precautions to protect archaeological resources, ultimately delivering a fully stabilized bulkhead area. The project falls under NAICS code 237990 and is associated with the state of Texas. Interested parties should note the posted date of November 6, 2026, with a response deadline set for November 19, 2026. Further details regarding the solicitation can be accessed through the Texas SmartBuy portal.

Parks and Wildlife Department

POSTED

DEADLINE

Temporary Stabilization of Bulkhead, Lake Livingston State Park

Solicitation # 802-27-86931

The Texas Parks and Wildlife Department is soliciting bids for the temporary stabilization of the bulkhead at Lake Livingston State Park in Polk County, Texas. The project requires a contractor to provide all labor, equipment, and materials to stabilize the eroding bulkhead, prevent further property loss, and mitigate safety risks to visitors while minimizing environmental impacts and protecting cultural resources. Work must be completed as soon as possible, but no later than December 31, 2026, with standard working hours from Monday through Friday, 8:00 AM to 5:00 PM. The contract will be awarded based on the best value, determined by the base bid, bidder responsiveness, and responsibility. Bidders must demonstrate successful experience with projects of similar size and complexity within the past five years and maintain a satisfactory performance score in the Vendor Performance Tracking System. Key requirements include compliance with prevailing wage scales, E-Verify usage, and the provision of a bid security bond for projects exceeding 25,000 dollars. Payments are made via state warrants within 30 days of receiving a properly prepared invoice. Final acceptance is subject to an inspection by TPWD personnel within five working days of completion, following a five-day advance notice from the contractor.

Parks and Wildlife Department

POSTED

DEADLINE

ITS Conduit and TrenchingThis subcontract for ITS Conduit and Trenching involves providing specialized earthwork and installation services for prime contractors on Florida Department of Transportation projects. The scope of work includes the installation of Rigid Galvanized Steel conduit through both open trench and aboveground methods, as well as clearing, grubbing, and the installation of performance turf or sod. All activities must strictly adhere to FDOT right-of-way specifications to ensure the delivery of a fully installed conduit system and a properly restored site grade. The opportunity is categorized under NAICS code 237990 and was posted on November 6, 2026. Interested parties must submit their responses by the deadline of November 19, 2026, at 2:00 PM. This project is specifically designed to support infrastructure improvements within the state of Florida under the oversight of the Florida Department of Transportation.

Florida Department of Transportation

POSTED

DEADLINE

Physical Hazard Rehabilitation at the former Hunt, Cornelius Mine

Solicitation # tender_22298

The Government of Ontario, through the Ministry of Energy and Mines, is soliciting bids for physical hazard rehabilitation at the former Hunt, Cornelius Mine. The project scope consists of five primary tasks: the detailed design and installation of a bat gate, the installation of 500 meters of fencing, project management including mobilization, demobilization, and access maintenance, and progressive rehabilitation reporting. All work must comply with specific technical standards, including the Agency Guide to Cave and Mine Gates 2009, a physical mine hazards risk assessment, and species at risk surveys. The anticipated contract start date is January 7, 2026, with a primary term of two years and a one-year extension option. The procurement process involves a mandatory site visit on November 18, 2026, with a final response deadline of December 7, 2026. Bids are evaluated in three stages: a mandatory qualification review, a technical evaluation requiring a minimum score of 70 percent, and a commercial evaluation based on pricing. Technical scoring is weighted across project experience, roles and responsibilities, occupational health and safety requirements, and a plan for beneficial participation with Ontario Indigenous communities. Awardees must provide proof of WSIB coverage, insurance, and tax compliance, and must identify a dedicated project team including a Project Manager, a Professional Engineer, and various technical support leads.

Energy and Mines

POSTED

2 days ago

DEADLINE

in 29 days

AI Contract Overview

The Supplemental Work for Differing Site Conditions subcontract, issued by the San Bernardino Land Development & Contracts agency in California, addresses critical construction challenges that may arise under a lump sum provision. The scope of work specifically covers unforeseen excavation requirements, the resolution of utility conflicts, and necessary soil stabilization efforts encountered during the construction process. This opportunity is categorized under NAICS code 237990 and was posted on June 10, 2025. Interested parties must submit their responses by the deadline of August 7, 2025. Detailed information and submission guidelines are available through the San Bernardino County electronic procurement portal.