2016-09-13_REVISION - C1981019 (3)

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If you have any questions, please contact me. Sincerely, Robert D. Zuber, P.E. Environmental Protection Specialist Rob.zuber@state.co.us cc: Alan Boehms, Office of Surface Mining C-PR-19 Stipulations 18 - COLOWYO COAL COMPANY WILL CONSTRUCT A GROUNDWATER MONITORING WELL COMPLETED IN THE TROUT CREEK SANDSTONE. FOLLOWING COMPLETION OF THE WORK, A MINOR REVISION WILL BE SUBMITTED TO UPDATE THE PERMIT APPLICATION PACKAGE WITH A COMPLETE DESCRIPTION OF THE WELL, AND TO UPDATE TABLES 2.04.7-38, -39, -40 AND -41, AND MAPS 10B AND 11C. THE REVISION WILL BE SUBMITTED NO MORE THAN 90 DAYS AFTER WELL COMPLETION. THESE ACTIONS MUST BE COMPLETED BEFORE ANY DISTURBANCE ASSOCIATED WITH THE COLLOM PIT BOX CUT IS ALLOWED TO OCCUR. 19 - DEWATERING WELL PERMITS MUST BE IN PLACE, AND A MINOR REVISION BE SUBMITTED AND APPROVED BY THE DIVISION TO UPDATE SECTION 2.03.10 OF VOLUME 1 OF THE PERMIT APPLICATION PACKAGE, BEFORE ANY DISTURBANCE ASSOCIATED WITH THE COLLOM PIT BOX CUT IS ALLOWED TO OCCUR. 20 - A DISCHARGE PERMIT FOR WATER PUMPED FROM THE DEWATERING WELLS MUST BE IN PLACE, AND A MINOR REVISION TO THE PERMIT SUBMITTED AND APPROVED BY THE DIVISION TO UPDATE SECTION 2.03.10 OF VOLUME 1 OF THE PERMIT APPLICATION PACKAGE, BEFORE ANY DISTURBANCE ASSOCIATED WITH THE COLLOM PIT BOX CUT IS ALLOWED TO OCCUR. 21 - COLOWYO COAL COMPANY WILL CONSTRUCT GROUNDWATER POINT OF COMPLIANCE MLC-04-02, AND CARRY OUT STANDARD WELL TESTS TO ESTIMATE AQUIFER PROPERTIES. FOLLOWING COMPLETION OF THE WORK A MINOR REVISION WILL BE SUBMITTED TO UPDATE THE PERMIT APPLICATION PACKAGE WITH A COMPLETE DESCRIPTION OF THE WELL, AND TO UPDATE TABLES 2.04.7-38, -39, -40 AND -42. MAPS 10B AND 11C SHOULD ALSO BE UPDATED. THESE ACTIONS SHOULD BE COMPLETED BEFORE THE END OF CALENDAR YEAR 2016. 22 - CONDUCT ADDITIONAL BASELINE ASSESSMENTS OF ALL SITES ELIGIBLE TO BE NATIONAL REGISTER OF HISTORIC PLACES AND “NEED DATA” SITES WITHIN THE PROPOSED COLLOM PERMIT EXPANSION AREA BOUNDARY.