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~~~ Ciric Center • <br />Cit of <br />1~~ Thornton <br />9500 Civic Center Drve <br />P O Box 291220 <br />Tnurn;o~~. Colorado 80229- t 220 <br />November 10, 1994 <br />Mr. Carl B. Mount <br />Senior Environmental Protection Specialist <br />Division of Minerals and Geology <br />1313 Sherman St., Room 215 <br />Denver, CO 80203 <br />Dear Mr. Mount: <br />• III IIIIIIIIIIIIIIII <br />999 <br />RECEIVEG <br />NOV 15 1994 <br />Division of Mmerais ~ ueoiogy <br />I am responding to your letter of October 28,1994, regarding the application (file no. M-94- <br />093), for Cooley Gravel Company to conduct surface mining and reclamation in Commerce <br />City, Colorado. <br />The City of Thornton diverts water from the South Platte River at the Burlington Ditch <br />Headgate, so any project which may impact the water quality or quantity is of concern. <br />We ask that the Division of Minerals and Geology take the following concerns into <br />consideration before issuance of a permit: <br />Open-pit mining may expose groundwater to evaporation Cooley Gravel <br />Company should develop an augmentation plan which is approved by the <br />State Engineers Office. <br />Cooley Gravel Company should not be allowed to generate any mining by- <br />products which could contaminate surface or groundwater. <br />Cooley Gravel Company should post sufficient bond to cover all future <br />reclamation costs. <br />Thank you for considering our concerns regarding this permit application. If there are any <br />questions, please call me at 538-7408. <br />Sincerely, <br />~(,u~e.. <br />~-~~ <br />Dave Bennett <br />Water Resources Administrator <br />DB:sb <br />cc: Mark Koleber, Water Resources Manager <br />885 ML <br />i Uzi Dui darn ~sboctnoo~ey <br />The City of Planned Progress <br />