North Umpqua Hydroelectric Project

Umpqua River Basin, North Umpqua River, Douglas County, Oregon

Project Profile

Constructed between 1947 and 1956, the North Umpqua Hydroelectric Project is located in south central Oregon in a remote area of Douglas County. For more than 50 years, the eight-dam hydroelectric project blocked access to historical habitat and degraded downstream habitat for ESA-listed fish. Several improvements are being made to the project as required by a new licensed issued in 2003.  These include providing fish passage into blocked habitat above Soda Springs Dam, construction of tailrace barriers, increased streamflows, reduced ramping, and habitat restoration.

Listed Species

Oregon Coast coho salmon



FERC Relicensing Status

NOAA Fisheries issued a biological opinion in 2002. FERC issued a new 35-year license in 2003, consistent with a 2001 settlement agreement and the biological opinion. Construction of tailrace barriers was completed in 2007 at Soda Springs Dam and in 2012 at Slide Creek powerhouse. In 2012, PacificCorp completed construction of downstream fish screens and bypass facilities for downstream passage, and an upstream fish ladder for passage at Soda Springs Dam.

Read about new fish passage on the North Umpqua River


Federal Energy Regulatory Commission

FERC eLibrary: Docket #P-1927

NOAA Fisheries Biological Opinion