Riffe Lake

Riffe Lake is a 23.5 mi long reservoir on the Cowlitz River in the U.S. state of Washington. It was created in 1968 with the construction of Mossyrock Dam by Tacoma City Light. Originally named Mossyrock Lake, then later as Davisson Lake after a utilities commissioner in Tacoma, the lake was renamed in 1976 after the community of Riffe, which was inundated by the lake. The residents of Kosmos and Nesika were also relocated as the lake's water level would submerge all of Nesika and much of Kosmos.The lake contains species of fish including rainbow and brown trout, landlocked coho, bass both large mouth and small mouth, bluegill, crappie, and perch.In 2017, Tacoma Power lowered the maximum water level of the lake by 30 feet due to concerns that the Mossyrock Dam could fail during a major seismic event and cause catastrophic flooding.