The Oregon State Habitat Office (OSHO), located in Portland, supports a variety of Habitat Conservation Division programs, centered around the conservation and protection of salmon, steelhead, marine fish and the habitats they rely upon. OSHO performs these duties under the authority of the Endangered Species Act (ESA), the Federal Power Act, the Fish and Wildlife Coordination Act, and the Magnuson- Stevens Fishery Conservation Management Act (MSA), among others. OSHO conducts ESA section 7 consultations and MSA essential fish habitat consultations with Federal agencies (e.g., U.S. Forest Service, Bureau of Land Management, U.S. Fish and Wildlife Service, U.S. Army Corps of Engineers, Federal Highway Administration, U.S. Coast Guard, etc.). Another primary task is assisting non-Federal entities as they develop ESA section 10 habitat conservation plans (HCPs). OSHO also provides guidance and support to non-Federal entities such as cities, watershed councils and Oregon governmental agencies as they develop ESA compliance plans under ESA Section 4(d) limits.

In La Grande Oregon, the Eastern Oregon Habitat Branch supports a team of biologists that address activities affecting listed Mid-Columbia River populations of steelhead and chinook salmon as well as habitat elements of the Federal Columbia River Power System (FCRPS) Biological Opinion.

The Willamette Basin Habitat Branch deals extensively with issues affecting salmonids in the Willamette River such as the Portland Harbor Superfund Site; Municipal, Residential, Commercial and Industrial Development (MCRI) Limit 12 with the various cities and counties in the Willamette Valley; ESA section 7 consultations with the Corps of Engineers; and a Habitat Conservation Plan (HCP) with the Portland Water Bureau on the operation of the Bull Run water supply.

In Roseburg, Oregon, the Southwest Oregon Habitat Branch biologists address activities affecting listed coho salmon. The office is involved in federal land management actions, south coast estuary issues, local stakeholders groups, working with fish passage teams in the Rogue and Umpqua Basins to identify fish barriers such as permanent dams, push-up dams, culverts, etc., and screening of irrigation diversions.

The Oregon Coast/Lower Columbia Habitat Branch is located in Portland and addresses activities affecting Oregon Coast coho salmon and Columbia River species that pass through the Columbia River estuary. The team is deeply involved with forest management issues, coastal dredging projects and habitat restoration activities in estuaries.

All Branches also address activities affecting essential fish habitat (EFH) by conducting consultations with Federal agencies as directed by the Magnuson-Stevens Fishery Conservation and Management Act (MSA). The Pacific Fishery Management Council (PFMC) has identified EFH for 83 species of west coast groundfish, 5 coastal pelagic species, and 3 species of Pacific salmon. Through the consultation process, NOAA Fisheries teams provide conservation recommendations to avoid, mitigate, or offset potential adverse effects to designated EFH resulting from any action undertaken, authorized, or funded by Federal agencies.

All branches are also extensively involved with habitat restoration projects throughout Oregon.