Surveys involve long days hiking and wading small, steep channels, often off-trail, to measure habitat attributes such as channel gradient and bankfull width, document natural obstacles and other habitat features, and record survey locations with GPS.Adult Spring Chinook Spawning Surveys: Conduct spawning ground surveys in tributaries and mainstem reaches upstream of Detroit, Cougar, and Green Peter reservoirs in the upper Willamette River basin. Other CFS Projects: Depending on scheduling and project needs, technicians may assist with a variety of other ongoing CFS projects, which may include bulk PIT tagging of juvenile Chinook salmon at hatcheries in the Willamette Valley, snorkel surveys for juvenile salmonids, piscivore diet sampling, and Pacific lamprey trapping.