This project in gustavus, alaska, will replace a perched culvert that carries harry hall creek under grandpa S farm road the culvert has become perched due to isostatic rebound, which has caused the…

This project in gustavus, alaska, will replace a perched culvert that carries harry hall creek under grandpa S farm road the culvert has become perched due to isostatic rebound, which has caused the stream to cut deeper into the landscape the approximately five mile long harry hall creek and mountain view stream has been identified by the US fish and wildlife service and the alaska department of fish and game as valuable spawning and rearing habitat for coho salmon the stream also supports populations of spawning pink salmon, dolly varden char, and cutthroat trout the perched culvert is a barrier especially for rearing coho salmon FRY the existing culvert crossing is unguarded and is a traffic hazard project deliverables include replacing the existing culvert with a timber bridge a small section of the downstream reach will be redirected to more naturally and efficiently convey flow in a manner that alleviates current bank erosion the expected outcomes of this work will allow the stream to cut deeper with isostatic rebound into the future without creating a new fish passage barrier in addition to improving habitat access for salmonid fishes, the project eliminates the traffic hazard on a road leading to residential subdivisions and serving a major tourist lodge this is the eighth project in a series to remove culvert fish passage barriers and install road or walking bridges for anadromous fish streams in gustavus