Garnet Mine Area Reclamation Project Final Engineering Evaluation/Cost Analysis Public Meeting – March 3, 2010. Montana Department of Environmental Quality Mine Waste Cleanup Bureau. Project Location.
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Montana Department of Environmental Quality
Mine Waste Cleanup Bureau
Prepare a functional guide for conducting reclamation activities that to the extent possible mitigate human health and environmental risks.
To screen, develop and evaluate potential response alternatives that would be used to clean up site mine waste.
Mine Waste Rock Investigation
ABA Results Summary
Metal Mobility Summary
Floodplain Tailings Investigation
Assumed Original Top of Dam
Estimated Height 8’-10’
Malachite (Cu) precipitate
from Jackleg Drill Holes
Oriole Adit Seepage
Flow 2.2 – 7.1 gpm
No Human Health affects from tailings, waste rock or surface water (excluding the Oriole Adit seepage) for any of the following recreational uses
Purpose – Identify and screen technology types and process options
General Response Actions
Engineering Controls typically include containment, capping, run-on/run-off controls, revegetation and/or disposal
Excavation and Treatment involves the removal of the contaminated materials and subsequent treatment to reduce toxicity and/or volume
In-Situ Treatment involves treating contaminate in place with the objective of reducing mobility and toxicity of problem constituents.
Response Action Alternative Evaluation