Gilson Gulch Outlet Stabilization
The Gilson Gulch Outlet Project was undertaken to control erosion and sediment near the confluence of Gilson Gulch and Clear Creek. The project was, in part, aimed at preventing further undercutting of the existing vertical high wall on the west bank of Gilson Gulch, which runs approximately 300 lineal feet north of Riverside Drive, in Idaho Springs. It was also designed to capture metaliferous sediment originating in the historically mined areas within the upper reaches of the Gulch. This channel stabilization and sediment control work was proposed primarily to protect water quality in clear Creek. This would result from reduced erosion during actual storm events and annual clean-outs of the existing sediment basin near the outlet of the Gulch. The City of Idaho Springs has committed to perform this maintenance work over the long term. The volume of sediment removed during annual maintenance will be measured and sampled and analyzed for chemical characterization. The primary success of the project will be measured in terms of the contaminated sediment it prevents from reaching Clear Creek.