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This Government Contract opportunity from California was posted on June 18, 2026. The submission period has ended. Browse the details below for market research, or find similar active opportunities.

Geotechnical Engineering Services

Closed
State & Local

Contract Overview

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

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NAICS: 541620
New
Federal
B--ONYX RANCH SVRA PROJECT
Solicitation # 140G0326Q0218
Solicitation 140G0326Q0218 is a request for quotation from the Department of the Interior for advanced statistical modeling and assistance for the Onyx Ranch State Vehicle Recreation Area. The project requires a contractor to analyze a 289-hectare dataset to identify critical issues and map occurrences of invasive species, fire-prone grasses, and protected species, including the desert tortoise and western Joshua trees. Key deliverables include publication-quality figures, distribution maps, and statistical models developed using ArcGIS and various advanced methodologies such as general linear mixed effects models and k-means clustering. The estimated period of performance is from October 1, 2026, to February 28, 2027, with work performed at the vendor's facility. The award will be based on a tradeoff method, requiring contractors to demonstrate advanced statistical expertise through peer-reviewed publications from the last 15 years and proficiency in complex spatial and non-parametric analysis. Required submission documents include a signed SF 18 form, a firm fixed-price quote, a technical submission detailing qualifications, a list of prior relevant contracts with references, and a SAM UEI. Initial drafts of specific tasks are due within 60 days of award, with model drafts due within 90 days. All deliverables become government property, and invoicing must be submitted based on hourly rates and hours worked. Responses are due to the contracting officer by September 17, 2026, at 1500 PST.
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about 14 hours ago

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Humboldt County Public Works in California is seeking a subcontractor for Geotechnical Engineering Services to support bridge stability and seismic resilience. The scope of work involves conducting subsurface investigations, performing soil testing, and providing professional foundation design recommendations. The project is located in Eureka, California, and falls under NAICS code 541620. Interested parties must submit their responses by the deadline of July 17, 2026.

General Info

Geotechnical engineering subcontractor for bridge stability and seismic resilience in Eureka, California.

Agency

California → Humboldt County Public WorksView Agency

NAICS

541620 - Environmental Consulting ServicesView NAICS

Place of Performance

Eureka, CA, 95501, USA

Set-Aside

NONE

Documents

This scope was carved out of DPW2026-004.

The full solicitation package (1 document), including the RFP, is on the prime solicitation, not on this scope.

View the prime solicitation

Design Engineering and Environmental Services for the Rehabilitation of Mattole River Bridge 04C0189

AI Contract Breakdown

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Timeline

PhaseClosed
Posted

subcontract

Response Deadline

Deadline has passed

Submission Closed

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Organization & Contact Information

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AgencyCalifornia → Humboldt County Public Works
ContactsNo contacts available
OfficeN/A
Organization / Agency
California → Humboldt County Public Works
View Agency Profile
Office AddressN/A
ContactsNo contact information available

Full Description

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Conduct subsurface investigations, soil testing, and foundation design recommendations for bridge stability and seismic resilience.

More opportunities from California → Humboldt County Public Works

Same awarding agency

NAICS: 541330
SLED
Design Engineering And Environmental Services For The Garberville Redwood Drive Complete Streets
Solicitation # DPW2026-006
Humboldt County Public Works has issued Request for Proposals No. DPW2026-006 for professional engineering, environmental, and landscape architecture services to implement Complete Streets improvements on approximately 0.5 miles of Redwood Drive in Garberville. The project requires the selected consultant to refine existing 30-percent design plans, conduct transportation planning studies, perform intersection redesigns, and develop final Plans, Specifications, and Estimate (PS&E). Key deliverables include environmental documentation meeting NEPA and CEQA requirements, such as a Categorical Exclusion, an Archaeological Survey Report, and a Native American Heritage Commission sacred lands search. All designs must comply with ADA Accessibility Design Guidelines and Caltrans Local Assistance Program Guidelines. Proposals are due by September 25, 2026, and will be evaluated using a 100-point system focusing on relevant experience (30 points), staffing levels (30 points), the ability to provide high-quality services (30 points), and local presence (10 points). The contract requires compliance with California prevailing wage laws, Title VI of the Civil Rights Act of 1964, and various non-discrimination statutes. While no specific DBE contract goals are currently applied due to a US DOT Interim Final Rule, consultants must still adhere to nondiscrimination requirements. The successful firm will be required to provide insurance certificates within ten days of the award and submit itemized invoices in duplicate to the Contract Administrator in Eureka, California.
Engineering Services

POSTED

23 days ago

DEADLINE

in 14 days
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