Black River (Washington)
The Black River of King County, Washington, once drained Lake Washington and the Cedar River into Elliott Bay via the Duwamish River.
In 1911, the Cedar River flooded Renton. To avoid future floods, in 1912 the Cedar was diverted into Lake Washington. Then, with the opening of Seattle's Lake Washington Ship Canal in 1916, the lake's level dropped nearly nine feet and the Black River dried up. Today, part of its bed forms the Black River Riparian Forest and Wetland.