Stream habitat fragmentation caused by manmade structures is ubiquitous in Colorado, creating a need for passage solutions that accommodate multiple fish species. This study tested the effectiveness of a rock-ramp fishway to pass nine fish species with a range of swimming abilities. Target species for fishway design included Brassy Minnow Hybognathus hankinsoni (weakest swimming), Longnose Dace Rhinichthys cataractae, Longnose Sucker Catostomus catostomus, and Brown Trout Salmo trutta (strongest swimming). Testing included a 46-hour enclosure study and three-month extended study, during which fish passage was evaluated using PIT tags. All species exhibited successful passage through the fishway during the enclosure study, but movement
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