The Bureau of Reclamation’s California Great Basin Region is seeking interest from small businesses, including 8(a), HUBZone, Indian Small Business Economic Enterprises, Service-Disabled Veteran-Owned, and Women-Owned Small Business concerns for a possible contract. The work supports the Shasta Dam and Reservoir Enlargement Project (SDREP) with environmental compliance services under NEPA, ESA, NHPA, and other federal laws, including project management, technical document development, biological/cultural resources/environmental analyses, and administrative, logistical, and technical support. The estimated cost is $1,000,000.00–$5,000,000.00, and performance is in Redding and Sacramento, California. The applicable NAICS code is 541620 with a $19M small business size standard, and the response will help determine whether the acquisition is set aside or unrestricted. This is a sources sought notice for market research and acquisition planning only; no formal solicitation currently exists, and SAM registration is required prior to award.