Columbia Flow Control Hoist Assists Fish Ladders

Columbia Flow Control Hoist Assists Fish Ladders

Application:  Fish Ladder Flow Control Hoist
Customer:  Portland General Electric
Location:  Willamette Falls, Oregon City, Oregon
Hoist Model:  Columbia H21500-4A17-L-00
Line Pull:  21,500 lbs. single layer and 43,000 lbs with 2-part line
Line speed:  4.5 feet per minute with 2-part line
Brake rating:  140,000 lbs
Power source:  460 VAC / Three phase / 60 Hz
Special features:  Dual 1½ HP brakemotors, 12” drum core grooved for dual 5/8” wire rope assemblies, 70.5” drum width, 4-cam rotary limit switch and custom base plate. Dual multi-turn potentiometers for position locating. Custom NEMA 4X control panel with variable frequency drive. Installed on the panel face: UP/DOWN momentary buttons, LOCAL/REMOTE switch for future remote control, LED pilot lights to indicate gate position for upper and lower maximums.

Why APPI:  Portland General Electric, in cooperation with the Oregon Department of Fish and Wildlife, controls the flow through the Willamette Falls fish ladder to ensure endangered salmon, steelhead and lamprey eel species can migrate freely to their spawning grounds.

Prior to the installation of this flow control hoist, the flow level “stop logs” were lifted and placed manually with multiple chain hoists and could only be accessed through an elaborate tunnel system under the falls.  PGE, based on their prior experience with us on other fish related projects, asked we design a hoist that would improve the efficiency of the operation and be capable of operating in the fish ladder environment.  With the new hoist in place adjusting the gates and stop logs has become easier, faster, more accurate and safer.

Please contact us if you would like more information about this particular fish ladder flow control 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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