Issues that likely affect or potentially affect coho population and status:
Includes Little Lake, the city of Willits and the headwaters. Upper Outlet/Little Lake, Mill, Willits, Broaddus, Baechtel, Upp, and Haehl creeks have or have had a coho presence.
Summer and fall flows are restricted by six dams on Boy Scout/Rowe, Davis, and Willits creeks. Low or no flow conditions are eliminating summer rearing and spawning habitat. Local residents state that no bypass flow is released;
Summer water temperatures exceed suitable ranges in some tributaries;
Water quality may be affected by nutrients and bacteria from livestock and sewage and other inorganic pollutants;
Stream bank erosion caused by down cutting from dams, livestock and absence or sparse riparian is common;
Sediment from poorly maintained roads and culverts are affecting instream habitat;
Canopy cover is deficient on Davis and Conklin creeks and in other tributaries;
Natural and man-made barriers decrease available spawning habitat in several tributaries;
Fine sediment is still being transported downstream from the 1955 and 1964 floods and impacts the lower reach of Outlet Creek, which can be observed by widened floodplains, absent riparian and elongated sediment bars.
Stream routing and channelization for city and farm roads and railroad, farming, ranching, and subdivisions have significantly changed the fluvial continuity of the lower reaches of the tributaries.