Huntley Diversion Dam is a concrete irrigation structure on the Yellowstone River downstream from Billings, MT. It is over 9 feet high and provides a complete barrier to upstream fish movement except during high flows when a bypass channel flows around the dam. The dam suffered some serious damage after the last flood on the Yellowstone and needed some major repairs. As part of the permitting process to reconstruct the dam, fish passage was part of the project.

The passage, which provides access to over 100 miles of river habitat, is a roughened channel around the north end of the dam. It has large exposed boulders strategically placed within the flow to create the proper gradient and an attractive flow to guide fish from the downstream end, up through 13 drops of the fishway, to above the diversion dam.

Montana Department of Fish, Wildlife and Parks and U.S. Bureau of Reclamation.