CalSim Model Development and Application

Basic Information
Title	CalSim Model Development and Application
Agency	Department of Water Resources
Department	Department of Water Resources
Event ID	10220250
Format/Type	Sell Event / RFx
Published Date	08/21/2026
Bid Due Date	09/15/2026
Pre Bid Conference	Mandatory
Pre-bid Date	08/31/2026 10:00AM
Pre-bid Location	MS Teams

Category Information
UNSPSC	81101500 Professional engineering services - Civil engineering 81111500 Computer services - Software or hardware engineering 70171506 Water resource development service contracting services - Ground or surface water modeling services 81101508 Professional engineering services - Civil engineering - Architectural engineering

Contact Information
Name	James Tedeschi
Email	james.tedeschi@water.ca.gov
Phone	916/803-6196

The Department of Water Resources (DWR), Division of Modeling Support Office, invites qualified firms to submit a Statement of Qualification (SOQ). Contractor will provide engineering services to develop, enhance, and apply the CalSim modeling tools, including CalSim 3, CalLite, CalSimHydro, CS3RimInflow, and the CalSim 3 Historical Hydrology Model (CS3HIST), to support simulation of CVP and SWP system operations and their service areas. This work includes improving and applying the WRIMS simulation engine, modeling water use for agriculture, urban, and refuge needs, and simulating streamflow and surface runoff from rim watersheds and valley floor areas. Contractor will also support calibration and validation of CalSim 3 surface and groundwater hydrology.

Estimated Contract Value: $1,000,000 - $10,000,000