Unofficial Notice of Invitation to Bid (NIB)

Patterson City is seeking bids from qualified and interested contractors for the following project titled, Retainer Agreement for Water and Stormwater -Related Services, identified under Solicitation ID: -. Work is to be performed near N 1st St, Patterson, CA 95363, USA in Stanislaus County.

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General Project Description

The City of Patterson is seeking proposals from qualified firms to establish an annual retainer agreement for professional engineering and surveying services on an "as needed" basis. The scope includes a wide range of water and stormwater-related services, such as regulatory compliance and reporting for water quality, water supply and resource management, Sustainable Groundwater Management Act (SGMA) support, stormwater management (NPDES, MS4 Phase II, SWPPP review), and infrastructure engineering and operational support (water system design, SCADA, asset management, CIP development). The selected consultant(s) will provide labor, equipment, materials, and supplies to perform these services as requested by the City.

General Bid Items

Quantity: - Unit: - Work Item: Water Quality Services – Regulatory compliance and reporting (DDW, SWRCB, EPA).
Quantity: - Unit: - Work Item: Water Quality Services – Drinking water quality investigations and corrective actions.
Quantity: - Unit: - Work Item: Water Quality Services – Water treatment process support and optimization.
Quantity: - Unit: - Work Item: Water Supply and Water Resource Management – Regulatory compliance and reporting (Annual Water Use Objective Report, Water Loss Audit, Annual Water Supply and Demand Assessment Report).
Quantity: - Unit: - Work Item: Water Supply and Water Resource Management – Water Supply Assessments and long-term forecasting (Master Planning, Urban Water Management Plans, Water Shortage Contingency Plans).
Quantity: - Unit: - Work Item: Water Supply and Water Resource Management – Compliance with AB 1668 and SB 606.
Quantity: - Unit: - Work Item: Water Supply and Water Resource Management – Hydrologic/hydraulic modeling and analysis.
Quantity: - Unit: - Work Item: Water Supply and Water Resource Management – Water system evaluation, design, and engineering.
Quantity: - Unit: - Work Item: Water Supply and Water Resource Management – Interactions with surface and recycled water.
Quantity: - Unit: - Work Item: Sustainable Groundwater Management Act (SGMA) -Related Services – Groundwater modeling and monitoring.
Quantity: - Unit: - Work Item: Sustainable Groundwater Management Act (SGMA) -Related Services – Support for Groundwater Sustainability Plan (GSP) Implementation (Well Mitigation Policy, Pumping Reduction, Evaluation of sustainability indicators and minimum thresholds).
Quantity: - Unit: - Work Item: Stormwater Management – NPDES and MS4 Phase II Permit compliance support.
Quantity: - Unit: - Work Item: Stormwater Management – Water quality monitoring and BMP Evaluation.
Quantity: - Unit: - Work Item: Stormwater Management – Low Impact Development (LID) design and review.
Quantity: - Unit: - Work Item: Stormwater Management – Hydromodification management.
Quantity: - Unit: - Work Item: Stormwater Management – Construction stormwater compliance assistance (SWPPP review and preparation).
Quantity: - Unit: - Work Item: Infrastructure, Engineering, and Operational Support – Water system improvement design.
Quantity: - Unit: - Work Item: Infrastructure, Engineering, and Operational Support – SCADA, telemetry, and instrumentation integration support.
Quantity: - Unit: - Work Item: Infrastructure, Engineering, and Operational Support – Asset management for water infrastructure.
Quantity: - Unit: - Work Item: Infrastructure, Engineering, and Operational Support – Project management and construction support services.
Quantity: - Unit: - Work Item: Infrastructure, Engineering, and Operational Support – Capital Improvement Plan (CIP) Development and Support.
Quantity: - Unit: - Work Item: Other Support Services – Assistance with water-related grant applications and funding opportunities.
Quantity: - Unit: - Work Item: Other Support Services – Interagency coordination for water supply agreements and transfers.

NAICS Classification

NAICS 541330 – Engineering Services (Providing professional engineering expertise for water and stormwater systems, design, analysis, and management)., NAICS 541360 – Geophysical Surveying and Mapping Services (Performing surveying related services, hydrologic/hydraulic modeling, and groundwater monitoring)., NAICS 541620 – Environmental Consulting Services (Advising on water quality, regulatory compliance, stormwater management, and sustainable groundwater management)., NAICS 541990 – All Other Professional, Scientific, and Technical Services (Project management, technical data analysis, and general support services).

Records and Due Date

This bid opportunity was entered into BidAmerica on December 22, 2025, and was last updated on January 21, 2026. All bids and/or proposals are due on February 10, 2026.

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Legal Disclaimer

All bidders are responsible for reviewing and verifying all official bid documentation directly from the issuing agency. BidAmerica aggregates public bid information for advertisement purposes for contractors and government agencies convenience. This Notice of Invitation to Bid is for reference purposes only and is not an official or complete representation of any documents issued by Patterson City. BidAmerica does not guarantee the accuracy, completeness, or timeliness of any information displayed and shall not be held liable for any errors, omissions, misinterpretations, or damages resulting from reliance on this summary. Contractors must obtain all official information—including plans, specifications, addenda, deadlines, submission requirements, qualifications, and bidding conditions—directly from Patterson City prior to bidding.