2011-03-24_REPORT - C1981019 (8)

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Colowyo Coal Company 201OAnnual Reclamation and Hydrology Report SECTION 7 - QUARTERLY FILL INSPECTION REPORTS RULE REQUIREMENT RULE 2.04.13(2) Rule 2.04.13(2) the Permittee may provide additional monitoring information as required by the approved permit; • Rule 4.09, page 4.09-2 of the mine permit, in reference to Streeter Fill, specifies, "The monitoring reports and certified inspection reports will be available during the inspections by the Division but will only be submitted to the Division in the ARR". • Volume 5B of the mine permit, Exhibit 19, page I a-4, requires, "After construction, the West Pit Fill will be monitored quarterly ..... and reports will be submitted in the ARR." These reports are in Figures 7-1, 7-2 and 7-3. • Volume 5B of the mine permit, Exhibit 19, page II a-4, in reference to Section 16 Fill requires, "Monitoring reports and certified inspection materials are • made available during periodic inspections conducted by the Division but are only submitted in the ARR." • Volume 12 of the mine permit, Rule 4.09, Rule 4 Page 22, in reference to both South Taylor Fills, requires that "Inspections will be conducted at least quarterly during the construction period." The reports, for East Taylor Fill only, are located in Figures 7-4 and 7-5. GENERAL DISCUSSION Tom Peterson (Environmental Solutions Inc., P.E.) performed P.E. duties at Colowyo Coal Mine during 2010. Streeter Fill: Under Technical Revision 64 monitoring requirements for Streeter Fill were relinquished and monitoring was discontinued during the 3rd quarter of 2006. West Pit Fill: The West Pit Fill Monitoring Well was inspected for significant changes in water level on a quarterly basis. No significant water level changes were observed in 2010. In addition, the fill was inspected quarterly to identify the development of any springs or seeps on the face of the fill. No seeps or springs Page 7-1