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Apr 19 06 05:34p Matt Carnahan <br />Maroh n, zo06 <br />Attn: Allen Sorenson <br />State of Colorado <br />Division of Minerals and Geology <br />Office of Mined Land Reclamation <br />1313 Shermarr Street, Rm. 215 <br />Denver, Colorado 80203 <br />RE: Roek Dog #1 Pi; File # M-2005-045, OntIIow from BP Site <br />Dear Mr. Sorenson: <br />970-884-5062 <br /> <br />SENT VIA FAX <br />This correspondence is in response to quesdoas concerning potential impacts of stonnwater <br />overflow originating from the BP Operations Center on County Road (CR) 309. BP has recently <br />constructed a detention pond at the southwesE comer of its site along the east side of CR 309. The <br />question was whether overflow from this pond could potentially reach the proposed gravel pit <br />Based on Seld review and topographic data assessment it was found that this potential outflow <br />would not reach the affected area of the proposed pit Arty outflow from this detention pond will <br />be collected rttto a bar ditch nurtring parallel with the CR 309 and carried south approximately <br />1,400 feet to a point where a culvert crosses under the roadway to the west This crossing carries <br />flows urto an existing ravine that enters the river valley well south of the proposed pit boundary <br />(see attached map). <br />Please contact me should you have questions or comments. <br />Sincerely, <br />Matt Carnahan <br />Consultant/ Agent for Gravel, LLC <br />Encl. <br />Xc: w/attachments, Kate Pickjord, DMG, DGO <br />D. Simonson, Gravel, LLC <br />p.2 <br />Matt Carnahan - 15 W. Mill Street, Ste 214 - P O Box 1951 - Bayfield, Colorado <br />81122 <br />(970) 759-5463 Fax: (970) 884-5062 <br />