The Umpqua Basin in Southwestern Oregon comprises about 3.24 million acres, 90% of which is federal, state and private forestland (2.92 million acres). County population was estimated at 103,152 in 2004, and the basin is also home to a number of species of salmonid fishes, including coho salmon, fall and spring chinook salmon, summer and winter steelhead, and seagoing and resident cutthroat trout. The North Umpqua River is a world-renowned fishery, and water-based recreation is important throughout the basin.
Umpqua Basin Total Maximum Daily Loads and supporting documents
TMDL Approved by EPA on April 12, 2007
TMDL approved by EPA on Jan. 29, 2002