Freeland Waste Pile
Historically, Trail Creek road was constructed out of mine waste from the Freeland Mine waste pile. Remnant channels under the road provide a conduit for subsurface flows to saturate the waste material and pick up heavy metals. A clay cut-off trench was installed along the road edge and Trail Creek. This was intended to provide a barrier to subsurface flows. A concrete cut-off wall under Trail Creek Road was constructed to direct subsurface ground water flows back into the stream channel.
The mine waste piles were amended to stabilize pH and limit the mobility of heavy metals. The mine waste piles were also amended with compost to provide a growth media to the waste piles to assist with the revegetation process. A run-on control channel was constructed along the upgradient side of the waste pile. It was constructed to divert clean run-off and overland flow around the waste pile.
The objective of the project was to contribute to the reduction of total metal loading in Trail Creek aimed at removing Trail Creek from State of Colorado 303(d) list of impaired waters.