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  • Carlton Acclimation Facility - rearing tanks


Project Highlights:

  • New fish acclimation facility for up to 220,000 summer Chinook salmon smolts
  • Eight (8) 30-foot diameter fish rearing tanks
  • Extension of river water piping to new building and distribution piping
  • Stormwater treatment
Carlton Acclimation Facility - construction
Carlton Acclimation Facility

Project Summary

Client: Grant County Public Utility District
Location: Twisp, WA
Service Provided: Construction Inspection
The Carlton Acclimation Facility was built to improve fish runs in the Methow River and to comply with the requirements of Grant County PUD’s FERC license. The facility can acclimate up to 220,000 summer Chinook salmon smolts for release each spring.
The project consisted of construction of a new 79’ x 163’ acclimation building, installation of eight (8) 30-foot diameter fish rearing tanks, extension of the existing river water piping to the new building, distribution piping for the use of well water to prevent frazil ice accumulation at the intake screens, an emergency water supply, fish release and rearing tank drain piping systems, new driveways around the building, and stormwater treatment via vegetated filter strips and infiltration swales.
MacKay Sposito provided onsite owner’s representation through construction inspection services.