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
Performance:
- 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
Performance:
- 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
Special Features:
- Variable frequency drives for precise speed and torque control
- Auxiliary radio controls for remote operation
- Motorized hammerhead trolleys rated at 6 tons each
- Horizontal trolley travel speed: 0-10 feet per minute
Why APPI
Tacoma Power and Light needed a solution for lifting fish screens at the Cowlitz Falls Dam. The extensive new construction for fish passage made configuring the hoist system challenging. APPI provided a system that utilized our hammerhead trolley design to help minimize the size of the hoists required for the application.
The custom-designed system allows 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. Variable frequency drives allow for precise speed and torque control, while auxiliary radio controls enable remote operation for all functions.
This solution effectively addresses the unique requirements of fish screen management at the Cowlitz Falls Dam, providing Tacoma Power and Light with efficient and flexible lifting capabilities in a challenging environment.
Please contact us if you would like more information about this custom dam hoist system or any of our other products and services.
