Deadman Creek originates in the mixed rangeland of on the northern western flanks of the Blue Mountains of SE Washington and terminates in the Lower Snake River. The creek is designated as a Minor Spawning Area mSA for steelhead and encompasses the watershed from the confluence with the Snake River up into the top of the drainage. The creek supports populations of wild Snake River ESU Steelhead .
Deadman Creek has undergone habitat degradation from the removal of riparian trees, elevated water temperature, channel straightening, excess fine sediments and floodplain confinement. Limiting factors in Deadman Creek are identified as reduced riparian function, fine sediment, limited pool habitat, low flows, and high summer temperature. Protection involves maintenance of existing condition, and the promotion of passive restoration to allow natural healing of habitat. Habitat actions implemented in this watershed include removal of imminent threats, riparian restoration and protection, upland restoration to prevent sedimentation.