Mining in this country and especially in Colorado yielded precious or profitable metals such as gold, silver, copper, lead, and platinum. However, the aftermath of such mining left behind unrecovered or subordinate minerals and other processing byproducts such as arsenic, mercury, cyanide, lead, and acids. Such wastes made their way into the soil and water. Many of these mines involved extensive underground workings. Mines also needed processing facilities such as mills to crush the ore and smelters to produce the metals, and other methods such as “placer” mining and dredge mining resulted in extensive erosion, scarring landscapes in the process.

When economic “busts” eventually arrived due to metal price drops, hardrock mining operations ended abandoning the site completely and usually never restored and/or remediated the hazards. Thousands of these dangerous abandoned mine features is the legacy of mining that RMC has on numerous occasions been contracted to address. We have worked to address: acid and caustic rock drainages, managing waste rock, mill tailings, and retort waste, installed physical safety hazard barriers, including stopes, adits, winzes, raises, buildings, high walls, settling ponds, other water retaining features, as well as other related dangerous structures.

RMC has deep experience in:
  • Design and Construction Management Services
  • Long-term Stabilization of Disturbed Areas
  • Drainage Stabilization
  • Waste Consolidation, Hauling, and Capping
  • Stream and Wetland Restoration
  • Historic Structure Demolition and Preservation
  • Mine Water Discharge Assessment and Treatment
  • Adit and Shaft Closures
  • Site Re-vegetation
  • Heavy Equipment Operation