Cortez Rohr, Deputy Refuge Manager at Red Rock Lakes Refuge in Montana (2019-2023), adjusts release gates on the Lower Red Rock Lake water control structure. Water levels at the refuge are regulated to provide increased hemi-marsh habitat for returning spring migrating waterfowl and shorebirds, ensure early trumpeter swan nesting success, facilitate later nesting success of ducks and geese, provide a staging area for fall migrating waterfowl, and to remain in compliance with water rights agreements.