Fish Presence data was generated by USFS fisheries biologists and Karuk Tribe fisheries biologists. The extent of access by species were delineated including suspected and historic range of both native and introduced fish species. This information was transferred on-screen to 1:24000 scale streams derived from Cartographic Feature Files (CFF). In the case of double-line streams, the right bank (looking downstream) was attributed and the left bank was removed. In the case of lakes and other large water bodies, a new line was digitized down the approximate center of the water body and attributed. For stream segments occurring on the quads between the Klamath National Forest west side and eastside for which 1:24000 data do not exist, stream segments were brought in from 1:100000 data.
Fire perimeters were obtained from 1:126720 Ranger District Fire Atlases and air surveys. Polygons were ocularly transferred to 1:62500 manuscripts. District Atlases contain all fires > 40 acres in size. For the Middle Klamath Fire Perimeters, only fires over 1000 acres and that burned after 1950 are displayed. These fires were selected as they were considered to have the greatest impact on the watershed.
Flood streams and ERFO (Emergency Road Federally Owned) sites were categorized following the 1997 storm event.
Karuk Tribal biologists and technician conducted field investigations that assessed fish passage and habitat connectivity in Middle Klamath tributaries. Problem sites were mapped using GPS and USGS Topo Maps and transferred into an ArcView shapefile. Prioritization was based in tributary attributes that included: Fish species and life stage presence, sensitive species, distance of upstream usable habitat, anthropogenic influence, and restoration feasibility.