Riffles Rock! One Structure for Both Fish Habitat Improvement and Streambank Erosion Reduction in Local Waterways.
Rock riffle structures were built in major tributaries of Dauphin Lake in the 1990s to improve lake conditions with sediment reduction and fish spawning habitat enhancement. After thirty years and many major flooding events, the riffles are in need of repairs in order to function as well as when they were originally built. On projects through the Fish and Wildlife Enhancement Fund, IMWD conducted preliminary surveys of the state of the structures and current function, and is planning to compare the results with a follow up study after some of the structures are repaired this winter.