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Apr 19 06 06'.25p Matt Carnahan <br />March 17, 2006 <br />Attn: Allen Sorenson <br />State of Colorado <br />Division of Minerals and Geology <br />Office of Mined Land Reclamation <br />1313 Sherman Street, Rm. 2l S <br />Denver, Colorado 80203 <br />RE: Rock Dog #1 Pit, File # M-2005-045, Oatfiow from BP Site <br />Dear Mr. Sorenson: <br />970-884-5062 <br />p.3 <br />~11c' U2C~ /2S~r~~- <br />d~~~~c~~~~~~~ i <br />SENT VIA FAX <br />This cortespondence is in response to questions concerning potential impacts of stormwater <br />overflow originating from the BP Operations Center on County Road (CR) 309. BP has recently <br />constructed a detention pond at the southwest corner 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 field review and topographic data assessment it was found that this potential outflow <br />would not reach the affected area of the proposed pit Any outflow from this detention pond will <br />be collected into a baz ditch running parallel with the CR 309 and rdtried south approximately <br />1,400 feel to a point where a culvert crosses under the roadway to the west. This crossing carries <br />flows into an existing ravine that enter: the river valley weq south ofthe proposed pit boundary <br />(see attached map}. <br />Please contact me should you have questions or comments. <br />Sincerely <br />~~! <br />Matt Carnahan <br />Consultant Agent for Gravel. LLC <br />~lif~ <br />Encl. <br />Xc: w/attachments, KatePicl~ord, DMG, DGO APR 1 7 ?~Lo <br />D. Simonson ,Gravel, LLC <br />Dur2„c±U FMS Of`ce <br />Division of t~iin>:~,a & Gaclogy <br />Matt Carnahan - 15 W. Mill Street, Ste 214 - P O Box 1951 - Bayfield, Colorado <br />81122 <br />(970) 759-5463 Fax: (970) 8845062 <br />