The Bureau of Reclamation, part of the Department of the Interior, is seeking vendors for a project focused on monitoring juvenile anadromous Oncorhynchus mykiss (California Central Valley Steelhead) in the Lower San Joaquin and Stanislaus Rivers, California. The primary objective is to enhance understanding of these fish populations to improve management and conservation efforts while optimizing water delivery and hydropower from the Central Valley Project (CVP). This multi-year study will involve estimating population sizes, demographics, survival rates, and analyzing the impacts of CVP operations on fish habitats, with work scheduled to commence on September 1, 2025, for a base year and two additional one-year options. Interested parties must submit a capability statement by April 11, 2025, to Margaret Jones at margaretjones@usbr.gov, as this sources sought notice is intended to gather market information and does not constitute a request for contract proposals.