Project Location: Wilson Creek, tributary to Hayfork Creek, tributary to South Fork Trinity River in the Shasta-Trinity National Forest.
Link to the location of the remediated barrier in the CDFW Map Viewer (BIOS): https://map.dfg.ca.gov/bios/?al=ds69&col=pad_id&val=707822
Passage Assessment Database ID: 707822
Project Description: An open-bottom 19-foot by 8-foot, 3-inch x 96-foot, 6-inch open bottom multip-plate arch will replace the existing 7-foot diameter x 110' corrugated metial pipe culvert (and associated reinforced concrete headwalls and wingwalls).
Pre-project conditions/barriers/challenges/background: The site has a seven-foot diameter corrugated metal pipe (CMP) culvert under a National Forest road that crosses Wilson Creek. The outlet area of the culvert is composed of a concrete-poured block pad several feet in height. A 'steep-pass' type fish ladder had been installed in good faith many years ago, but there is no evidence the ladder was ever successful in passing fish. The National Marine Fisheries Service (NMFS) considers ESA-listed as Threatened coho salmon Critical Habitat in the Trinity River to be as valuable as and on par with the direct presence of coho salmon. The current draft of the local Coho Salmon Recovery Plan written by NMFS urges fish passage barrier removal projects be implemented to create newly accessible Critical Habitat for coho salmon.
Project actions/deliverables: Replace an existing culvert with an open-bottom arch that has a natural streambed.
Fish benefits/ecological value:
The characteristics of the 1.1 miles of newly-accessable fish habitat created upon project completion is of high quality. Upon completion of the Project, 1.1 miles of high quality fish habitat become available to USFS Sensitive Species-listed Klamath Mountain Province steelhead. Similarly, Pacific Lamprey, proposed to become added to the USFS Sensitive Species listed within the near future, may also be present shortly after completion, and be able to access the 1.1 miles of habitat, and in some circumstances, beyond the point upstream at which steelhead can reach. The drainage area of Wilson Creek upstream from the Project site is composed primarily of old-growth forest/late successional reserve habitat that will remain as it is into the foreseeable future.
Amount of habitat made available as a result of project implementation: 1.1 miles.
Habitat quality and type characterization:
Project cost: $993,000
Project start date:
Project end date:
Monitoring and evaluation:
Did the project make a difference, and if so, how?