Rotary Screw Trap   3

Background
The U.S. Bureau of Reclamation operates and maintains the Central Valley Project (CVP) for navigation, flood control, fish and wildlife mitigation, agricultural water supply, power generation, and recreation. This contract aims to develop environmental information relevant to the CVP's operation, particularly focusing on monitoring the ecosystem's response to CVP operations.

Work Details
The contractor will provide management, personnel, supervision, labor, materials, transportation, and other necessary items to perform services outlined in the Performance Work Statement (PWS). Key tasks include:

1. Using rotary screw traps on the American River at Watt Avenue Bridge and Stanislaus River at Caswell State Park to estimate juvenile production of Chinook salmon and steelhead from October to June. Traps will operate seven days a week during high emigration periods (November-February) with reduced sampling during lower periods.

2. Conducting capture-efficiency trials for Chinook salmon and potentially steelhead juveniles.

3. Supporting a juvenile production model following established protocols.

4. Collecting biological data on salmonids including length, weight, and tissue samples.

5. Enhancing RST database functionality for improved data accuracy.

6. Coordinating field sampling with special studies as requested by the Contracting Officer's Representative (COR). Deliverables include an RST study plan, technical memoranda analyzing juvenile abundance estimates by brood year, daily digital uploads of Chinook salmon estimates for public websites, monthly data files for open access repositories, annual technical memoranda compliant with accessibility standards, and QA/QC'd project code posted online.

Period of Performance
February 1, 2026 through January 31, 2027 with two option years extending through January 31, 2029.

Place of Performance
American River at Watt Avenue Bridge in Sacramento, CA and Stanislaus River at Caswell State Park in Ripon, CA.