By Loren Everest Fishery Biologist

Summer Steelhead surveys have been conducted on the North Fork Trinity River each year from 1978 to 1997 (except 1986) during the late summer period. Adult Steelhead were observed and counted by divers with mask and snorkel. From 1990 to 1997 steelhead distribution was mapped by reach and notes were taken by divers on habitat preference. Most years 100 % of the river available to anadromous fish was surveyed, however in 1978, and 1987 total run size was extrapolated from partial counts. Results showed that adult steelhead were present and counts ranged from a low of 57 i