This Government Contract opportunity from California was posted on July 29, 2026. The submission period has ended. Browse the details below for market research, or find similar active opportunities.

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Hydrologic Modeling and Simulation Development

Closed

State & Local

Submission Closed08/05/2026, 09:00:00 PM UTC

Contract Overview

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

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NAICS: 541620

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DEADLINE

Food Safety & Quality Compliance ConsultingThe Food Safety and Quality Compliance Consulting subcontract, issued by the CHALL Purchasing Department in Massachusetts, focuses on ensuring health department and state regulation compliance for prime contractors at City of Revere Food Hub projects. The selected provider will be responsible for performing audits, establishing safety protocols, developing Food Safety Plans, conducting sanitation training, and executing quality inspections. Key deliverables include certified safety manuals and detailed compliance reports. To qualify for this role, the contractor must hold a Certified Food Protection Manager certification. The project is located in Revere, Massachusetts, and falls under NAICS code 541620. Interested parties must submit their responses by the deadline of October 8, 2026.

CHALL - Purchasing Dept.

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DEADLINE

Military-Grade Packaging and Marking ServicesThis subcontract for Military-Grade Packaging and Marking Services involves providing specialized packaging and marking for prime contractors on DLA supply contracts. The service provider is responsible for packaging 14 units according to MIL-STD-2073-1E, marking them per MIL-STD-129, and performing palletization in accordance with RP001. A key requirement is the use of non-plastic packaging materials as specified in the solicitation. The contract is managed by the Fluid Handling Division of the Department of Defense under NAICS code 541620. All completed units are to be delivered to DLA Distribution DDSP New Cumberland in Pennsylvania. The response deadline for this opportunity is September 28, 2026.

FLUID HANDLING DIVISION

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Chilled Water Loop Cleaning and Water Quality AnalysisThis subcontract for Chilled Water Loop Cleaning and Water Quality Analysis involves performing water testing, flushing, and chemical cleaning for prime contractors at the Otis Air National Guard Base. The scope of work includes extracting samples for baseline analysis of pH, TDS, and biological activity through accredited third-party laboratories, with all chemical applications managed according to ASHRAE Guideline 12-2023. The selected provider must obtain SDS approval from the Otis ANGB Bioenvironmental and Environmental Office and is responsible for delivering a cleaned loop along with a comprehensive baseline water quality analysis report. This project is managed by the Military Division of Massachusetts and is located at Camp Edwards.

MILDV - Military Division

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Environmental AssessmentThis subcontract involves performing environmental site assessments for prime contractors on Florida Department of Agriculture and Consumer Services projects located at the BADDL facility in Kissimmee, Florida. The scope of work includes conducting Phase I and II Environmental Site Assessments and regulatory compliance reviews to identify potential contamination or constraints, culminating in the delivery of a formal Environmental Assessment Report. Qualified providers must hold the necessary environmental consulting certifications and licenses as required by Florida law. This opportunity falls under NAICS code 541620 and is associated with the Florida Department of Agriculture and Consumer Services.

Department of Agriculture and Consumer Services

POSTED

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Construction Management & Cost EstimatingThe Construction Management and Cost Estimating subcontract is for the County of Santa Cruz General Services Department in Santa Cruz, California. The selected provider will support prime contractors by performing construction oversight, project management, and cost estimation. Key responsibilities include site supervision, budget tracking, project scheduling, and the delivery of construction progress reports. Qualified candidates must possess at least five years of experience working on public sector projects. This opportunity was posted on September 16, 2026, with a response deadline of October 16, 2026. The contract falls under NAICS code 541620.

County of Santa Cruz General Services Department

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Environmental Consulting & TestingThis subcontract for Environmental Consulting and Testing supports the County of Santa Cruz General Services Department by providing environmental assessments, hazardous material testing, and regulatory compliance services for prime contractors. The scope of work includes conducting Phase I and II Environmental Site Assessments, performing hazardous material sampling, and executing environmental impact analyses. Selected providers are required to have at least five years of experience working on public sector projects and must deliver comprehensive environmental reports, testing results, and remediation plans. The project is located in Santa Cruz, California, and falls under NAICS code 541620. The solicitation was posted on September 16, 2026, with a response deadline of October 16, 2026.

County of Santa Cruz General Services Department

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Specialized Biological & Natural Resource ServicesThis subcontract for Specialized Biological and Natural Resource Services supports the County of Santa Cruz General Services Department in California. The selected provider will perform biological surveys, arboriculture, and archaeological assessments, including wildlife impact studies, tree inventories, and cultural resource surveys. All work is conducted for prime contractors on county projects, with the final delivery consisting of detailed biological reports and archaeological findings. Qualified candidates must possess at least five years of experience working on public sector projects. The opportunity is located in Santa Cruz, California, under NAICS code 541620. The solicitation was posted on September 16, 2026, and the deadline for responses is October 16, 2026.

County of Santa Cruz General Services Department

POSTED

DEADLINE

Sustainability and Energy Resilience ConsultantThis subcontract opportunity is for a Sustainability and Energy Resilience Consultant to support prime contractors on projects for the City of Rancho Cordova. The selected consultant will perform detailed analysis and develop strategies focused on energy efficiency, environmental resilience, electrification, heat mitigation, and indoor environmental quality. Key deliverables include a sustainability recommendations report and an energy efficiency strategy, with a specific focus on creating plans for renewable energy and battery storage utilizing LEED or other green building software. Qualified candidates must hold a LEED AP or equivalent certification to be eligible for this role. The project is located in Rancho Cordova, California, under NAICS code 541620. Interested parties must submit their responses by the deadline of October 3, 2026.

City of Rancho Cordova

POSTED

DEADLINE

Water Resource Planning and Evidence Base DevelopmentThis subcontract for Water Resource Planning and Evidence Base Development involves providing technical analysis and development for a strategic, place-based evidence base and outline water plan. The selected provider will support prime contractors on ECW projects by integrating diverse data sources and identifying water-related interventions while ensuring full alignment with PR29, RBMP, and DEFRA Regional System Planner arrangements. The scope of work includes analyzing environmental limits based on the Water Framework Directive and Habitats regulations to deliver a comprehensive strategic evidence base. This opportunity is managed by Enterprise Cheshire And Warrington under NAICS code 541620, with a response deadline of September 24, 2026.

Enterprise Cheshire And Warrington

POSTED

DEADLINE

Cheshire and Warrington Outline Water Plan

Solicitation # ocds-h6vhtk-06f109

Enterprise Cheshire and Warrington is seeking consultants to develop a strategic, place-based evidence base and outline water plan to support the newly established Cheshire and Warrington Combined Authority. This initiative aims to align local growth and environmental ambitions with national and regional water planning, specifically supporting the Independent Economic Review and integrating with DEFRA's Regional System Planners and PR29 investment plans. The project focuses on identifying water infrastructure upgrades, managing flooding and drought risks, and supporting ecosystem services and farming resilience. The contract is a fixed-price engagement valued at 80,000 GBP excluding VAT, with a performance period from 5 October 2026 to 31 March 2027, and a possible six-month extension. Key deliverables include the facilitation of working groups focused on growth scenarios, flood risk, and nature-based solutions. Award criteria consist of a mandatory conformance check followed by a weighted evaluation of 75 percent for technical merit and 25 percent for value for money. Submissions were due by 24 September 2026, and the contract is governed by a standard services agreement with specific requirements for confidentiality, health and safety, and professional indemnity insurance.

Enterprise Cheshire And Warrington

POSTED

DEADLINE

Cheshire and Warrington Outline Water Plan

Solicitation # C&W_OWP

Enterprise Cheshire and Warrington is seeking consultants to develop a strategic, place-based evidence base and an outline water plan for the Cheshire and Warrington Combined Authority. This initiative aims to support an Independent Economic Review by identifying necessary water infrastructure upgrades and addressing flooding and drought risks to ensure they do not hinder local economic growth. The project will also focus on enhancing farming resilience and supporting wider ecosystem services. The contract is designed to align local spatial and infrastructure planning with national and regional processes, specifically engaging with the North West Regional System Planner as part of a DEFRA pilot. This effort seeks to influence water system investment plans and ensure that regional water planning supports local environmental and growth ambitions. Interested parties must respond to solicitation C&W_OWP by September 24, 2026.

ENTERPRISE CHESHIRE AND WARRINGTON

POSTED

about 21 hours ago

DEADLINE

in 7 days

AI Contract Overview

The contract seeks to develop and maintain integrated hydrologic models for the Russian River basin using GSFLOW, MODFLOW, PRMS, and MODSIM software platforms, with a focus on calibration and the incorporation of climate change scenarios to enhance predictive accuracy and long-term resilience. The work involves creating robust simulative frameworks that can evaluate water availability, streamflow dynamics, and groundwater interactions under varying environmental conditions, ensuring the models serve as actionable tools for water resource planning and management. The effort is classified as a subcontract under NAICS code 541620 and is issued by the Sonoma County Water Agency, with performance centered in Santa Rosa, California, at zip code 95403. Proposals must be submitted by August 5, 2026, and the solicitation was posted on July 29, 2026. The project emphasizes technical precision in model integration, requiring expertise in hydrologic simulation, data assimilation, and climate impact analysis to support regional water security objectives amid evolving climatic challenges.

General Info

Develop hydrologic models for Russian River basin using GSFLOW, MODFLOW, PRMS, MODSIM with climate change scenarios.

Agency

California → Sonoma County Water AgencyView Agency

NAICS

541620 - Environmental Consulting ServicesView NAICS

Place of Performance

Santa Rosa, CA, 95403, USA

Set-Aside

NONE

Documents

This scope was carved out of TW 25/26-154.

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

View the prime solicitation

Russian River Integrated Hydrologic Model Support Services

AI Contract Breakdown

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No contract breakdown available.

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Timeline

PhaseClosed

PostedJul 29

subcontract

Response DeadlineAug 5

Deadline has passed

Submission Closed

08/05/2026, 09:00:00 PM UTC

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Organization & Contact Information

AgencyCalifornia → Sonoma County Water Agency

ContactsNo contacts available

OfficeN/A

Organization / Agency

California → Sonoma County Water Agency

View Agency Profile

Office AddressN/A

ContactsNo contact information available

Full Description

Develop and maintain integrated hydrologic models for the Russian River basin using GSFLOW, MODFLOW, PRMS, and MODSIM, including model calibration and climate change scenario integration.

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