Laserfiche WebLink
2019 Plan of Operations Modification American Gypsum Company, LLC <br /> 1.3 Mining History <br /> The Eagle-Gypsum Mine was originally permitted in 1984 by R.A. Mining Company. The operator <br /> changed to Eagle-Gypsum, Ltd. in 1986, to Centex Eagle Gypsum Company, LLC in 1997, and <br /> then to American Gypsum Company, LLC in 2002. <br /> The Lower Pit is located on private land and was permitted in 1984 (CO DNR, 1984)and operated <br /> until 2007. The Upper Pit and the associated haul road and sediment control ponds were <br /> authorized in 2002(BLM, 2002; CO DRMS,2001).Table 1.4 summarizes the BLM and CO DRMS <br /> authorizations for the Mine. <br /> TABLE 1.4: BLM AND CO DRMS AUTHORIZATIONS <br /> Description Date A.- <br /> M-1984-041 Permit 24 December 1984 CO DRMS <br /> Plan of Operations (EA CO-077-4-76) 11 September 1984 BLM <br /> Permit/Plan Amendment 01 (EA-CO-077-7-11) 28 January 1987 BLM <br /> Permit/Plan (CO-078-0-3P)Amendment 02 30 April 1990 BLM <br /> (EA-CO-078-0-24) <br /> EA-CO-078-0-24 Decision on Gypsum Mine Plan of 04 May 1990 BLM <br /> Operations CO-078-0-3P <br /> Permit NO. M-81-041, Revision No. AM-002 02 May 1990 CO DRMS <br /> Plan of Operations Amendment CO-078-90-1 P 06 May 1992 BLM <br /> Mineral Patent 05-92-0016 15 May 1992 BLM <br /> Plan of Operations Amendment CO-078-0-3P 07 September 1995 BLM <br /> (for temporary maintenance) <br /> Permit Amendment 03 05 February 2001 CO DRMS <br /> Plan of Operations CO-078-90-1 P Amendment 24 September 2002 BLM <br /> (CO-140-2001-064 EA) <br /> Plan of Operations Minor Modification COC-072973 21 April 2017 BLM <br /> (CON040) (per CO-140-2001-064 EA DR) <br /> Use and Occupancy Authorization COC-072973 (CON040) 09 August 2016 BLM <br /> TR-01: Revise permit boundary for new"burden spoil'area 28 February 1985 CO DRMS <br /> TR-02: Modify access road 27 February 1987 CO DRMS <br /> TR-03: Change pit slopes 22 July 1991 CO DRMS <br /> TR-04: Change mine plan to abandon low-grade material 01 June 1992 CO DRMS <br /> TR-05: Establish maximum land use/reclamation areas 20 August 1997 CO DRMS <br /> TR-06 P]: Establish location of Upper Pit(formerly East Pit; <br /> change not implemented based on available information), 27 October 2003 CO DRMS <br /> relocate sediment pond spillways to native ground <br /> TR-07 131: Relocate sediment control structure M601 <br /> (formerly P5) 02 March 2006 CO DRMS <br /> TR-08: Add compost facility at mine (not constructed) 22 August 2008 CO DRMS <br /> TR-09: Haul road realignment, incorporate stormwater 18 May 2017 CO DRMS <br /> management structures <br /> Am Gypsum Poo Mod ISSD 20190909 September 2019 [6] <br />