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A Determination of the Colorado Division of Reclamation, Mining and Safety <br />with regard to <br />Points of Ground Water Compliance <br />at the <br />Edna Strip Mine, Permit C-1980-001 <br />October 5, 2006 <br />Byron G. Walker, EPS <br />Page 1 <br />This determination is required by Rule 4.05.13(1)(6) of the Regulations of the Colorado Mined <br />Land Reclamation Board for Coal Mining (Rules) which reads, in part, as follows: One or more <br />points of compliance shall be established for any coal operation which, in the judgment of the <br />Division, has the potential to negatively impact the quality of groundwater for which quality <br />standards have been established by the Water Quality Control Commission. The coal operation <br />subject to this opinion is the Edna Strip Mine (Edna), operated by the The Pittsburg & Midway <br />Coal Mining Co. (P&M), under Colorado Division of Reclamation, Mining and Safety <br />(Division) coal mine permit C-1980-001 (Permit). <br />The Permit is in Permanent Cessation, reclamation is nearly complete, and the site is nearing <br />potential final bond release. Footnote references to sources of information are indicated <br />throughout this paper. <br />Table of Contents: <br />Rule 4.05.13(b)(i)(A) ....................................................... <br />Determination of Potentially Impacted Groundwater...... <br />Geologic Setting and Mining Activity ......................... <br />Bedrock Groundwater .................................................. <br />Backfill Groundwater ................................................... <br />Alluvial Groundwater .................................................. <br />Probable Hydrologic Impacts .......................................... <br />Bedrock Groundwater .................................................. <br />Groundwater Quality ................................................... <br />Colorado Discharge Permit System ............................. <br />Well Locations and Use ............................................... <br />CWQCCR 41 ................................................................... <br />Designation of Specified Areas ................................... <br />Use and Classification of Ground Water ..................... <br />Groundwater Points of Compliance ................................. <br />Compliance ...................................................................... <br />Acronyms <br />........................................................ ...... 2 <br />........................................................ ...... 2 <br />........................................................ ...... 2 <br />........................................................ ...... 3 <br />........................................................ ...... 4 <br />........................................................ ...... 4 <br />........................................................ ...... 5 <br />........................................................ ...... 5 <br />........................................................ ...... 7 <br />........................................................ ...... 7 <br />........................................................ ...... 7 <br />........................................................ ...... 8 <br />........................................................ ...... 8 <br />........................................................ ...... 9 <br />........................................................ .... 10 <br />........................................................ .... 11 <br />CDPHE Colorado Department of Public Health and Environment <br />CDWR Colorado Division of Water Resources, State Engineer <br />CWQCCR Colorado Water Quality Control Commission Regulation <br />