West Fork has partnered with Stillwater Sciences to monitor the potential fish entrainment at Robbs Peak Powerhouse to determine when and at what flow fish migration is occurring, and at what flow entrainment, if any, is occurring.
West Fork Environmental staff worked with members of Normandeau & Associates to measure stream flow and characterize physical habitat conditions across 6 geomorphic reaches of the Chehalis and South Fork Chehalis Rivers.
Biologists from West Fork Environmental conducted instantaneous stream discharge measurements at 28 sites on 12 major tributaries within the Queets Watershed, including the Queets and Clearwater Rivers
West Fork Environmental has done extensive habitat and animal surveys for forestry clients throughout Skamania and Klickitat Counties in Washington between 2008 and 2015 for the threatened western gray squirrel and other squirrel species.
West Fork Environmental installed four PIT tag antennas in Ohop Creek, near Eatonville, WA, to collect data leading to a better understanding of the relative importance and role of the newly restored reach on movement and residence patterns of juvenile coho within the upper system.
West Fork Environmental provided field crews to Seattle Public Utilities (SPU) in support of fisheries research and monitoring in the Cedar River Municipal Watershed for six years. Our field support for spawning ground surveys covered multiple species and locations in the watershed including kokanee salmon, Chinook and coho salmon, bull trout and pygmy whitefish.
West Fork Environmental assessed the quality and stage-related connectivity and suitability of redband trout spawning habitat within a reach of the Spokane River where normal sediment transport processes have been altered by dams and impoundments over the past century.
West Fork annually conducts surveys for the presence/absence of fish for its forestry clients to verify regulatory stream typing prior to timber harvest. Over the past ten years we have conducted over 3,700 protocol stream surveys for Washington clients alone to determine physical barriers to fish movement, resulting in a large number of changes to portions of the Washington Department of Natural Resources hydro-layer.
West Fork evaluated four potential barriers in the lower 1,700 feet of Williams Creek, tributary of the Cedar River (WA) for Seattle Public Utilities to determine the likelihood for passage by Chinook, steelhead, coho and resident trout.
West Fork provided technical field assistance over four seasons in support of long-term aquatic monitoring in the Cedar River Municipal Watershed. Habitat assessments were performed throughout the 90,000 acre watershed in streams of varying size.
West Fork annually conducts stream habitat surveys to determine the distribution of native fish in streams for its forestry clients. The purpose of this work is to verify regulatory stream typing prior to timber harvest or road maintenance.
West Fork provided field support to Seattle Public Utilities to implement an acoustic telemetry study tracking adult bull trout, rainbow trout and pygmy whitefish in Chester Morse Lake, a reservoir managed to supply drinking water to the City of Seattle.
The U.S Army Corps of Engineers, Portland District, began operating a new experimental fish collector at Cougar Reservoir in May 2014 with the goal of attracting and collecting juvenile salmon as part of a research program investigating downstream passage issues at the dam.
Foster Dam on the South Fork Santiam River was outfitted 30 years ago with a spillway weir as a surface outlet for downstream migrating fish passage. The weir sits on top of stop logs inserted into a spill bay gate opening.
West Fork Environmental completed the first year of a three year study investigating the spatial and temporal distribution of spawning sockeye salmon in the Cedar River between Lake Washington and Landsburg Diversion Dam.
Detection of PIT tagged out-migrating juvenile salmonids in relatively large natural rivers is problematic because available antenna systems are typically incapable of interrogating the upper portions of the water column where fish may travel.
As users of PIT tag technology we’ve seen our share of instream antennas get destroyed by winter weather. To solve this challenge we changed from the traditional glued PVC pipe used in NOAA-style antennas to fusion welded HDPE