Lombard Mill


Location

The Lombard Mill is located in Clear Creek County on the Clear Creek Ranger District of the Arapahoe-Roosevelt National Forest, 10 miles northwest of Idaho Springs.It is approximately 1 mile southeast of St. Mary's Glacier and Alice along Cumberland Gulch, about 1 mile upstream from confluence of Cumberland Gulch and Fall River.

The Lombard Mill is located in Clear Creek County on the Clear Creek Ranger District of the Arapahoe-Roosevelt National Forest, 10 miles northwest of Idaho Springs.It is approximately 1 mile southeast of St. Mary's Glacier and Alice along Cumberland Gulch, about 1 mile upstream from confluence of Cumberland Gulch and Fall River.

Part of the Lombard Mill Site, Pre-Reclamation.

Part of the Lombard Mill Site, Pre-Reclamation.

Summary

Three features causing environmental degradation at the site were addressed; an adit, waste-rock dump, and tailings. A lower tunnel of the mine was dug into the hillside at the same level as the mill site. A drainage flowed from the tunnel through a small ditch which made its way along the edge of large waste rock piles, down through a wetland and into Cumberland Gulch.

Adjacent to the mill site was an impoundment on Cumberland Gulch that apparently supplied the mill with water. The impoundment was breached which held a small pool of water that flowed through the breech, across Forest Road 271 and into Cumberland Gulch. A regrading of waste rocks and run-on control ditch was constructed between the waste-rock and hillside to disperse hillside runoff to the west side of the waste-rock pile. The pond area was recontoured to remove the impoundment and restore a stream channel through the pond area. A channel was constructed to capture flow from the hillside and direct it through the main channel of Cumberland Gulch. Erosion control measures were installed to control erosion and sedimentation throughout the project area.

Read the Final Project Report, and view a map of the project area.