Alamosa River Treatment
1992-1994: EPA and Colorado Department of Public Health and Environment emergency response at abandoned Summitville Mine.
1994: Interim Record of Decision:
1: Water treatment plant.
2: Cropsy Waste Pile, Beaver Mud Dump, Summitville Dam Impoundment and mine pits.
3. Heap Leach Pad.
1994-1995: Heap Leach Pad detoxification.
1994: Reynolds Adit bulkhead.
1996: Cropsy Waste Pile, Beaver Mud Dump, Summitville Dam Impoundment and mine pit closure.
1996-2000: Modification to the existing water treatment plant.
1994-1998: Cropsy Valley restoration and revegetation.
2005: We assume lead role for wastewater treatment plant and site operation and maintenance.
2006: Rule change before the Water Quality Control Commission for the Alamosa River.
2008-2009: Wightman Fork and Summitville Dam Impoundment improvement, installation of micro-hydro-power.
2010: Begin construction of new water treatment plant.
2011: Completed construction of new water treatment plant
2013: Completed reconstruction of the Wightman Fork rundown structure; Summitville Mine site achieved the site-wide construction completion milestone"(Summitville Mine).