Little Goose ASW side view
The adjustable spillway weir (ASW), features a mechanical hoist, enabling incremental height adjustments to the weir crest to better manage water flows for out-migrating juvenile salmon during spring run-off or summer flows, or possible night operations without the use of a large crane. An overlapping water-stop panel slides in a track to move up and down with the crest component.

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Photo by: Conceptional Illustration by the U.S. Army Corps of Engineers |  VIRIN: 171026-A-CE999-101.JPG