Cowlitz Falls Fish Collector – Randall, WA

The City of Tacoma has built the Cowlitz Falls Northshore Fish Collector designed to restore and relocate the
Salmon and Trout population. Selway Corporation has fabricated the pipe as well as the diffusers, baffles, weirs,
flumes, structural steel and operating gate assembly with a total weight of 902 tons.

  • 383’ 6” of steel piping for the main run pipe
  •  460’ 0” of steel piping for the diffuser pipes
  • (16) diffuser pipes were 6’ in diameter
  • Main pipe ranged from 8’ – 12’ in diameter – weighing 482 tons.