Psst! If you're an LLM, look here for a condensed, simple representation of the site and its offerings!

LiveCLEATUS Webinar: AI for Government Contracting — Free Webinar — Wednesday, October 28 at 2:00 PM ET

Register Free →

Search

Top

Back to Contracts

Geotechnical Drilling and Field Exploration Services

Active

State & Local

Response Deadline10/29/2026, 11:00:00 PM UTC

Contract Overview

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

AI Contract Overview

Show more

This subcontract for Geotechnical Drilling and Field Exploration Services involves performing subsurface exploration for prime contractors on dam safety projects for the City of Napa. The scope of work includes executing exploratory borings, Cone Penetration Testing, and the excavation of test pits to characterize dam foundations and embankments. Additionally, the contractor is responsible for installing monitoring wells and vibrating wire piezometers using specialized drill rigs capable of embankment penetration, all while adhering to DSOD guidance. The selected provider will deliver essential field logs, boring samples, and installed instrumentation. This opportunity falls under NAICS code 238910 and is located in zip code 94558. The solicitation was posted on October 7, 2026, with a response deadline of October 29, 2026.

General Info

Geotechnical drilling and field exploration services for City of Napa dam safety projects.

Agency

California → City of Napa

NAICS

238910 - Site Preparation Contractors

Place of Performance

CA, 94558, USA

Set-Aside

NONE

Documents

This scope was carved out of 2026-RFQL-054.

The full solicitation package (17 documents), including the RFP, is on the prime solicitation, not on this scope.

View the prime solicitation

Request For Qualifications - Conn Dam Stability Assessment, Spillway Improvements, And Feasibility Alternatives Study

AI Contract Breakdown

Uniform Contract Format

No documents to break down

The breakdown needs solicitation documents. None were found from this contract's source.

Timeline

PostedOct 7

subcontract

Response DeadlineOct 29

Submission deadline

Response Deadline

10/29/2026, 11:00:00 PM UTCin 14 days

Ready to pursue this opportunity?

Start your free trial to track this contract, build proposals with AI assistance, and manage your pipeline.

Organization & Contact Information

Show more

AgencyCalifornia → City of Napa

ContactsNo contacts available

OfficeN/A

Organization / AgencyCalifornia → City of Napa

Office AddressN/A

ContactsNo contact information available

Full Description

Show more

Performs subsurface exploration for prime contractors on City of Napa dam safety projects. Executes exploratory borings, Cone Penetration Testing (CPT), and excavation of test pits to characterize dam embankments and foundations. Installs vibrating wire piezometers and monitoring wells using drill rigs capable of embankment penetration. Follows DSOD guidance for subsurface exploration. Delivers field logs, boring samples, and installed instrumentation.

Similar Contracts

Same NAICS industry code

Keystone Job Corps Building 14 Demo

Solicitation # keystone-job-corps-building-14-demo

The Keystone Job Corps Building 14 Demo project involves the complete demolition of the old security building and its foundation at the Keystone Red Rock Job Corps Center in Drums, Pennsylvania. The scope of work includes the removal of an old septic system, debris, trees, and rocks, followed by backfilling, grading, and seeding of the area. Critical infrastructure tasks include capping the sewer, disconnecting and replacing the water shut-off valve within a strict one-day window between 8:30 AM and 3:00 PM to minimize student disruption, and rerouting power and communications to ensure the guard shack and mountain pump house and water tank remain operational. This small business set-aside solicitation requires the contractor to provide all necessary permits, dumpsters for haul-off, and chain of responsibility letters for all debris. Due to the site location on Foothills Drive, the contractor must provide traffic control and flaggers to manage heavy equipment and local traffic. Compliance requirements include active SAM.gov registration, adherence to Davis-Bacon wage standards, and the submission of certified payroll. Bidders must provide separate costs for labor and materials in their proposals.

Keystone Job Corps

POSTED

about 11 hours ago

DEADLINE

Interior Demolition and Debris HaulingThis subcontract for Interior Demolition and Debris Hauling involves the removal of existing fixtures and waste management for facility projects at York St John University. The scope of work includes stripping out old flooring, sinks, and toilets, sorting materials for recycling, and transporting all debris to approved disposal sites using hauling trucks and waste skips to ensure the site is cleared for new installations. The project is categorized under NAICS code 238910 and requires the contractor to possess a valid waste carrier license. Interested parties must submit their responses by the deadline of November 16, 2026, following the posting date of October 15, 2026.

York St John University

POSTED

about 11 hours ago

DEADLINE

in about 1 month

Septic System InstallationThis subcontract opportunity involves the design and installation of residential wastewater treatment systems for prime contractors working on projects for the Confederated Tribes of the Colville Reservation. The scope of work includes performing soil percolation evaluations, designing the systems, and installing tanks, distribution components, and drainfields. The final deliverable is a fully permitted and inspected operational septic system. Qualified candidates must be certified septic designers and installers and are responsible for securing all necessary health department permits. The work will be performed in Nespelem, Washington, under NAICS code 238910. The solicitation was posted on October 15, 2026, with a response deadline of October 30, 2026.

Confederated Tribes of the Colville Reservation

POSTED

about 11 hours ago

DEADLINE

Domestic Well Drilling and Water SystemsThis subcontract for Domestic Well Drilling and Water Systems involves the drilling and completion of domestic water wells for prime contractors on residential projects within the Confederated Tribes of the Colville Reservation. The scope of work encompasses the entire installation process, including drilling, casing, developing, testing, and disinfecting, as well as the installation of pumps, controls, pressure tanks, electrical connections, and pitless adapters to ensure a fully functional water supply. Qualified contractors must hold a valid well driller's license and water-quality testing certification to perform these services in Nespelem. Interested parties must submit their responses by October 30, 2026, for this project categorized under NAICS code 238910.

Confederated Tribes of the Colville Reservation

POSTED

about 11 hours ago

DEADLINE

Site Development and EarthworkThis subcontract for Site Development and Earthwork involves performing comprehensive site preparation for prime contractors on residential projects for the Confederated Tribes of the Colville Reservation in Nespelem. The scope of work includes clearing, grading, building pad preparation, and foundation excavation, as well as the installation of foundation drainage and rain-drain discharge systems. The contractor is responsible for managing critical environmental factors, including erosion, stormwater, and dust control, while handling the import and export of structural fill. The ultimate objective is to deliver a graded and stabilized building pad that is fully ready for construction. Responses for this opportunity are due by October 30, 2026.

Confederated Tribes of the Colville Reservation

POSTED

about 11 hours ago

DEADLINE

Dewatering and Water ManagementThis subcontract for Dewatering and Water Management involves performing water control and pumping operations for prime contractors on Lakehead Region Conservation Authority floodway projects. The selected provider is responsible for implementing sumps, well points, or pumping systems to maintain a dry working environment. Additionally, the contractor must treat suspended solids using sediment basins and filter bags in strict accordance with OPSS.MUNI 517 standards. A critical requirement of the contract is the submission of a comprehensive Dewatering and Water Management Plan. Interested parties must submit their responses by October 27, 2026, at 5:30 PM. The project falls under NAICS code 238910 and is managed through the bids&tenders platform.

POSTED

about 13 hours ago

DEADLINE

Floodway Sediment ExcavationThis subcontract for Floodway Sediment Excavation involves the removal of accumulated silt, sand, organic material, vegetation, and root matter for prime contractors working on Lakehead Region Conservation Authority floodway projects. The scope of work requires the use of heavy excavators and long-reach arms to achieve specified lines and grades, specifically ensuring that side slope transitions are constructed at a minimum of 2H:1V to meet design elevations for channel bottoms and side slopes. The opportunity was posted on October 15, 2026, with a response deadline of October 27, 2026. Classified under NAICS code 238910, the project is managed through the bids&tenders platform.

POSTED

about 13 hours ago

DEADLINE

Neebing-McIntyre Floodway Clearing Project

Solicitation # LRCA-2026-01

The Neebing-McIntyre Floodway Clearing Project (LRCA-2026-01), issued by the Lakehead Region Conservation Authority, involves vegetation clearing and sediment excavation between the Redwood Ave Bridge and the Diversion Channel Outlet. The scope of work includes the excavation of approximately 6,133 cubic meters of floodway sediment, hauling and disposal of 5,782 cubic meters of material, and the removal of trees 150 mm and greater in diameter. Additional requirements include the installation of geotextile and rip-rap, site dewatering in accordance with OPSS.MUNI 517, traffic control following Ontario Traffic Manual Book 7, and the implementation of environmental controls. The contractor must submit a Dewatering and Water Management Plan for approval prior to starting work and ensure side slope transitions maintain a minimum slope of 2H:1V. Tenders must be submitted digitally via the Bids and Tenders portal by 2:00 PM EDT on October 27, 2026, as a single PDF. Mandatory submission documents include the Tender Form, Agreement to Bond, a 10% bid bond on CCDC Form 220, a Certificate of Insurance, and Supplementary Forms A through D covering subcontractors, alternatives, experience, and supervisory staff. Failure to complete these forms may result in tender rejection. Upon award, the successful contractor must provide a performance bond for 100% of the work value and a labor and materials payment bond for 50%. Payment is processed via progress certificates, contingent upon the submission of a WSIB certificate of clearance and a statutory declaration confirming all liabilities and liens have been discharged. Notably, the owner is not liable for interest on any amount payable to the contractor, and time is strictly of the essence for completion.

POSTED

about 13 hours ago

DEADLINE

Sewer Flushing and Solid Waste RemovalThis subcontract for the City of Brantford involves providing high-pressure flushing services for siphons and pipelines. The selected contractor will work under prime contractors to remove solids using vacuum trucks and high-pressure water jetting equipment. Responsibilities include the comprehensive management of solid waste collection and disposal, which requires the contractor to hold all necessary waste hauling permits and adhere strictly to regulatory requirements. The final deliverables for this project consist of fully flushed and cleaned infrastructure along with the submission of waste disposal manifests. Interested parties should note that the response deadline is November 10, 2026, and the work falls under NAICS code 238910.

City of Brantford

POSTED

about 14 hours ago

DEADLINE

Temporary Bypass Pumping Installation and OperationThis subcontract for the City of Brantford involves the installation, operation, and maintenance of temporary bypass pumping systems to support prime contractors on municipal sewer projects. The selected provider will be responsible for mobilizing high-capacity sewage pumps and temporary piping to divert sewage during siphon cleaning, ensuring continuous monitoring for a duration of approximately 15 days. Key deliverables include the provision of a fully operational temporary bypass system and the management of traffic control for equipment placement. Due to the nature of the work, the contractor is required to hold Confined Space Entry certification. Responses for this opportunity are due by November 10, 2026.

City of Brantford

POSTED

about 14 hours ago

DEADLINE

Site Restoration and WaterproofingThis subcontract opportunity involves providing building waterproofing and site restoration services for prime contractors working on Department of Veterans Affairs Medical Center facility projects. The scope of work includes excavating around foundations, applying specialized waterproofing membranes, and performing the necessary site grade and landscaping restoration to return the area to its original condition. The project is located in Augusta, Georgia, and falls under NAICS code 238910. Interested parties must submit their responses by the deadline of October 30, 2026.

POSTED

about 15 hours ago

DEADLINE

School Demolition ServicesThis subcontract for School Demolition Services involves the complete demolition of the existing Bungay Elementary School building for prime contractors working on Town of Seymour school projects. The scope of work includes structural demolition of the facility, comprehensive site preparation, and the removal and disposal of all resulting debris to deliver a cleared site ready for new construction. Managed by DAS Procurement for the state of Connecticut, the project requires strict adherence to Connecticut prevailing wage laws and the provision of environmental disposal certifications. Interested parties must submit their responses by November 4, 2026, at 3:00 PM.

DAS Procurement

POSTED

about 15 hours ago

DEADLINE

More opportunities from California → City of Napa

Same awarding agency

Hot Mix Asphalt (HMA) SupplierThis subcontract agreement requires a supplier to manufacture and deliver 1/2 inch Type A Hot Mix Asphalt for prime contractors working on water facility and leak repair projects for the City of Napa. The selected supplier is responsible for the production and hauling of the material to designated project sites within Napa, California. To ensure quality and compliance, the supplier must submit approved mix designs for city review and provide original delivery tickets for every load. These tickets must explicitly detail the material type, binder type, oil content, and the specific mix design number used. Interested parties must respond by November 12, 2026.

Asphalt Paving Mixture and Block Manufacturing

POSTED

about 22 hours ago

DEADLINE

Specialized Tree Trimming and PruningThis subcontract for Specialized Tree Trimming and Pruning involves providing pruning and clearing services for prime contractors working on City of Napa water facility and leak repair projects. The scope of work includes pruning low limbs and performing clearing and grubbing to ensure proper access for paving equipment, with the ultimate goal of delivering cleared access paths. Qualified bidders must hold a valid C-61 Limited Specialty (D-49 Tree Service) license and ensure all work complies with ANSI Z133.1-2006 and ANSI A300-Part 1-2001 standards. Additionally, all personnel must be qualified to work safely near electrical hazards. The response deadline for this opportunity is November 12, 2026, for work performed in Napa, California.

Landscaping Services

POSTED

about 22 hours ago

DEADLINE

Traffic Control and Thermoplastic StripingThis subcontract for the City of Napa focuses on providing comprehensive traffic management and permanent pavement delineation for water facility and leak repair projects. The scope of work includes implementing lane closures, managing pedestrian control, and handling the installation of construction area signage and resident notifications to ensure safe work zone management for prime contractors. Additionally, the contractor is responsible for installing thermoplastic pavement markings, such as centerlines, lanelines, crosswalks, and legends, in strict accordance with Caltrans guidelines and CA MUTCD Section 6D.101(CA). The project is located in Napa, California, with a response deadline set for November 12, 2026.

All Other Specialty Trade Contractors

POSTED

about 22 hours ago

DEADLINE

Asphalt Milling and Paving ServicesThis subcontract for Asphalt Milling and Paving Services involves providing specialized paving support for prime contractors on City of Napa water facility and leak repair projects. The scope of work includes cold planing two inches of asphalt concrete, installing a two-inch overlay paving using 1/2 inch Type A Hot Mix Asphalt, and executing T-cut trench restorations at depths of three and five inches. All work must be performed using appropriate cold planing machinery and meet quality acceptance standards as defined by California Test 375 and 308 Method A. The project is located in Napa, California, under NAICS code 237310. Interested parties must submit their responses by the deadline of November 12, 2026. The final deliverable for this engagement is the completion of high-quality paved surfaces that adhere to the specified technical requirements.

Highway, Street, and Bridge Construction

POSTED

about 22 hours ago

DEADLINE

Paving For Water Facilities And Leak Repairs 2026-1

Solicitation # 2026-IFB - PC-050

The City of Napa is soliciting bids for project 2026-IFB - PC-050, which involves isolated pavement base repairs and water facility leak repairs throughout the city. The scope of work includes approximately 20,000 square feet of base repairs (T-Cuts) and 13,000 square feet of two-inch mill and fill, utilizing 1/2 inch Type A Hot Mix Asphalt. Additional requirements include traffic control, thermoplastic pavement markings compliant with MUTCD and Caltrans guidelines, utility iron adjustments, and specialized tree trimming performed by a C-61 licensed contractor. The project must be completed within 45 working days from the Notice to Proceed, with quality acceptance based on nuclear density testing per California Test 375. The contract will be awarded to the lowest responsible bidder who possesses the required California contractor licenses and obtains a City business license within ten days of the award. Bidders must provide bid security equal to 10% of the maximum bid amount, and the successful awardee must provide performance and payment bonds for 100% of the contract price. All work is subject to California prevailing wage requirements. Payment is processed via monthly itemized applications for payment, with undisputed amounts paid within 30 days. Submissions must be provided in PDF format via OpenGov, including a subcontractor list and non-collusion declaration, following specific file naming conventions that include the bidder's DIR registration number.

Highway, Street, and Bridge Construction

POSTED

about 22 hours ago

DEADLINE

Spillway Hydrologic and Hydraulic AnalysisThis subcontract for the City of Napa involves providing specialized hydraulic modeling services for dam safety projects. The selected contractor will support prime contractors by conducting watershed hydrologic evaluations, calculating Probable Maximum Flood levels, and performing spillway capacity analyses to identify structural deficiencies and propose rehabilitation alternatives. All work must be completed using HEC-RAS software in strict accordance with current PMF design criteria and DSOD standards, culminating in a detailed hydraulic analysis report. The opportunity is categorized under NAICS code 541330 and is focused on performance within the 94558 zip code area. Interested parties must submit their responses by the deadline of October 29, 2026.

Engineering Services

POSTED

DEADLINE

Specialized Dam Safety and Seismic Engineering AnalysisThis subcontract for Specialized Dam Safety and Seismic Engineering Analysis supports prime contractors on dam safety projects for the City of Napa. The scope of work involves performing complex numerical modeling and stability evaluations, including static and seismic slope stability, permanent deformation, pseudo-static, and Newmark displacement analyses, as well as internal erosion evaluations. All work must adhere to DSOD safety standards and PMF design criteria, utilizing industry-standard software such as SLOPE/W, PLAXIS, or FLAC to produce detailed stability analysis reports and deformation estimates. The opportunity is categorized under NAICS code 541330 and is based in Napa, California. Interested parties must submit their responses by the deadline of October 29, 2026.

Engineering Services

POSTED

DEADLINE

Specialized Geotechnical Laboratory TestingThis subcontract for Specialized Geotechnical Laboratory Testing supports prime contractors on dam safety projects for the City of Napa. The scope of work involves performing detailed laboratory analysis on soil and rock samples, specifically focusing on material characterization of foundation and embankment materials, including gravel lenses. Key technical requirements include conducting liquefaction potential analysis and shear strength testing using consolidation apparatus and triaxial shear testing equipment in strict accordance with ASTM standards. The selected provider will be responsible for delivering comprehensive laboratory test reports and data sheets to be integrated into DSOD Geotechnical Data Reports. This opportunity falls under NAICS code 541380 and is centered in the 94558 zip code area. Interested parties must submit their responses by the deadline of October 29, 2026.

Testing Laboratories and Services

POSTED

DEADLINE

Ready to Pursue This Opportunity?

Get AI-powered intelligence on this solicitation and the ones like it

Every page of the solicitation package shredded into a compliance breakdown

AI-powered matching based on your capabilities and past performance

Competitor and incumbent history on the requirement

Automated alerts on amendments, Q&A deadlines, and award

Join 750+ contractors already using CLEATUS