Custom Columbia Dam Hoist System

Custom Columbia Dam Hoist System

Application:  Lifting fish screens weighing 24,000 pounds and 7,000 pounds
Customer:  Tacoma Power and Light
Location:  Cowlitz Falls Dam, Washington State
Hoist Model:  Columbia HL14000-4A17-L Dual Drum Hoist

  • Line Pull:  14,000 pounds on the first layer (single line)
  • Line Speed:  0-12 feet per minute on the first layer (single line)
  • Wire Rope Capacity:  29′ x 5/8″ wire rope per drum
  • Power Source:  460 VAC / Three phase / 60 Hz

Hoist Model:  Columbia HL7000-4A17-L Single Drum Hoist

  • Line Pull:  7,000 pounds on the first layer (single line)
  • Line Speed:  0-12 feet per minute on the first layer (single line)
  • Wire Rope Capacity:  29’ x 5/8” wire rope
  • Power Source:  460 VAC / Three phase / 60 Hz

Trolley Model:  Columbia HH-12 Motorized Hammerhead Trolley

Why APPI:  Providing for fish passage at this dam required extensive new construction that made configuring the hoist system to lift the screens a challenge.  Our response was a system that took advantage of our hammerhead trolley design to help minimize the size of the hoists required for the application.  It was designed to allow an operator to lift and position the fish screens individually or in tandem.  The motorized hammerhead trolleys are rated at 6 tons each and the reeving through them doubles the line pull of each hoist.  They can travel horizontally from 0-10 feet per minute.  Variable frequency drives allows precise speed and torque control while auxiliary radio controls allow remote operation for all functions.

Please contact us if you would like more information about this custom dam hoist or any of our other products and services.


Allied Power Products, Inc. has specialized in providing winches, hoists, capstans and cranes to meet our customers’ specific application requirements for more than 30 years.

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