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LARRY E. O'BRIAN <br />FOUNDER <br />STEVAN L. O'BRIAN <br />PRESIDENT <br />EpviroI)n)eI)t, Iqc. <br />August 25, 2011 <br />VMMr. Peter S. Hays <br />Division of Reclamation, Mining & Safety <br />1313 Sherman St, # 215 <br />Denver, CO 80215 <br />Dear Peter; <br />RE: Grand County Department of Road and Bridge <br />Benson Pit, M-1977-256 <br />Sincerely, <br />Environment, Inc. <br />Stevan L. O'Brian <br />President <br />cc Grand County Department of Road and Bridge <br />File <br />7985 VANCE DRIVE, SUITE 205A <br />ARVADA, COLORADO 80003 <br />303 - 423 -7297 <br />FAX 303 - 423 -7599 <br />min 2 :2011 <br />DIVI3101 <br />l-0 Mining and Safety <br />On behalf of my client Grand County Department of Road and Bridge I will res <br />to the Office of the State Engineer's comment response dated August 17, 2011 in the order <br />presented. <br />1. Grand County Department of Road and Bridge understands this requirement and as <br />the mine floor lies well above the groundwater table there should be no problem <br />complying. <br />2. Water used at the site is obtained from the Sunset Ridge HOA or the Denver Water <br />Board from legal sources approved for that use. <br />3. The floor of the mine is gravel and little stormwater accumulates on the disturbed <br />area. It soaks into the gravel shortly after a storm event. Under normal conditions <br />Grand County does not nor will allow stormwater to accumulate on the site for <br />more en 72 h our <br />periods mox�; � then � � �, horn's. - <br />If you have any other questions or need more information please call me. <br />