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• iii i iiiiiiuiiiiiii • <br />999 <br />STATE OF <br /> <br />COLORADO <br />DIVISION OF MINERALS AND GEOLOGY ~ <br />Department of Natural Recoun es ~ <br />1313 Sherman tit . Koom ! I5 <br />Denver, Colorado 80205 <br />Phone 1303) A6n i5L7 <br />FAX: 1303! A72-YII01. <br /> DEPARTMENT OI <br /> NATURAI <br /> RESOURCE`. <br />October 21, 1996 <br /> Roy Romer <br /> <br />Mr. Dennis Staebell Governor <br /> <br />L.G. Everist, Inc. wm~ss.En~nnead <br />Executive Director <br />9065 Qulnce Michael 8. Long <br />Henderson, CO 80640 Din ann Dirtttor <br />RE: Response to Technical Adequacy Review for new Permit <br />Application, ~M-96-049, Maryland Creek Ranch Pit <br />Dear Mr. Staebell, <br />This letter is being written in response to Tuttle Applegate's <br />response on your behalf to the Division of Minerals and Geology <br />(DMG)'s technical adequacy review on your permit application for <br />Maryland Creek Ranch Pit, #M-96-049. A few issues still remain to <br />be resolved before DMG can make a decision regarding your permit <br />application. They are as follows: <br />A) (1) The setback of 100' around Maryland Creek may be <br />adequate; however, the Division need to know where the 100- <br />year floodplain of the creek is before making such a decision. <br />B) (2) A Technical Revision describing the construction plans, <br />lining, and sizing of the augmentation pond must be submitted <br />when this information is available, and before the pond is <br />lined. A written agreement to do so when this is possible, <br />will be sufficient at this time. <br />C) (1) Please add a test for Oil & Grease onto the list of <br />quarterly groundwater testing parameters, since the site will <br />include storage of hydrocarbon materials. <br />D) (2) The Detention Pond Detail sketch is adequate from a <br />conceptual viewpoint, but several details need to be added. <br />They are: a scale, the size of the proposed spillways, and <br />proof that the proposed design can hold the ten-year peak flow <br />and that the spillway can pass the 100-year peak flow safely, <br />with one foot of freeboard minimum. <br />E) Either a written agreement to remain 200' back from State <br />Highway 9 until a setback agreement is reached with the CDOT, <br />or engineering drawings and soils analysis proving that no <br />effects would result from mining closer than 50 feet, must be <br />submitted prior to approval of this permit. Once an agreement <br />