North Fork Subbasin Overview
The most northerly of the five subbasins, the North Fork Subbasin has the steepest topography and
broadest tributary valleys. Although the formation of this region created steep slopes, the area is
relatively more stable and coherent compared to the rest of the watershed. About 56 percent of the
Subbasin has a high to very high potential for landsliding. Major tributaries include the Little North
Fork, Robinson, Dry, Stewart and Billings creeks. The land is primarily used for timber production,
grazing, small vineyards and rural 40 acre and larger subdivisions. The subbasin supports populations
of steelhead trout, with coho salmon only occasionally observed.