Cowlitz River Hydroelectric Projects

Columbia River Basin; Cowlitz River, Lewis County, Washington

Project Profile

This project blocked passage and degraded habitat for ESA-listed fish. Improvements include establishment of or improvements to juvenile and adult passage, habitat restoration and instream flow.

Listed Species

Lower Columbia River Chinook

Lower Columbia River coho

Lower Columbia River steelhead

Columbia River chum


Tacoma Power

FERC Relicensing Status

FERC granted a new 35-year license in 2003. NMFS completed a biological opinion on March 23, 2004. FERC amended the new license on July 9, 2004 to incorporate conditions of the biological opinion. Since the new license, Tacoma Power has carried out a number of actions including, a hatchery complex update, Fisheries Hatchery Management Plan development, improvement of Mayfield Dam’s downstream passage system, and tested various methods to increase juvenile fish collection at Cowlitz Falls. Tacoma Power is in the process of designing a new collector for downstream migrants to be built at Cowlitz Falls Dam starting in 2014 with a completion time at the end of 2016.


Federal Energy Regulatory Commission

FERC eLibrary: Docket #P-2016

NOAA Fisheries Biological Opinion dated March 23, 2004; NMFS No. 2001/02045

Related videos