Siphon for Galloway Ditch [Canal] flowing "under" Mann Creek. At high water when the irrigation dam below is out this siphon with its concrete apron forms a considerable barrier for steelheads and salmon
12 ft impassable bedrock chute short distance above highway bridge This is topped by a 6 ft dam, Location Notes: Sulphur and Goat Creeks - tributaries to Cowlitz below the Cispus River (Washington)