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r <br /> <br /> <br />~~ ~ ~ --~'4s .,~ ._~ 8 66 3 19-6 251 <br />... n ,nO nv~kltl ion. <br />February 23, 2007 <br />Project No. LOVREA-6D46-52-108-A{ ~, ~~• , ,.. ~ ..~.s . ,~ ,,.,~. ~~~o„~~, a~53~ <br />Mr. Thomas A. Schreiner ~;!-~I~= ~4 4~°. <br />Colorado Division of Minerals and Geology <br />Department of Natural Resources BAR 122007 <br />13 13 Sherman Street, Room 215 Divlsbn ur rc;;c,~,.,ai~pn C J~~ <br />Denver, Colorado 80203 Mining andsa;e;y <br />RE: Technical Revision to the Larimer Pit, Permit # M-1974-069AM2 - Optional <br />Reclamation of Pit No. 8, Loveland, Larimer County, Colorado <br />Dear Mr. Schreiner: <br />Pursuant to our phone conversation regarding the above referenced pit, we are providing you with this <br />request for Technical Revisions to Permit # M-1974-069AM2 for the Larimer Pit, held by Loveland <br />Ready Mix-Concrete, Inc., of Loveland, Colorado. Included in this letter of request you will find a <br />narrative description of the proposed change, a map of the ponds, a cross section of the intended <br />revision, description of proposed work to accomplish the revision, and excerpts from the original <br />permit as needed. <br />Water is a limited commodity in the State of Colorado and elsewhere. The demands for water are <br />ever increasing for residential, industrial, and farming uses. It is becoming to precious of a resource to <br />be allowed to sit in reclamation ponds evaporating. Therefore, we are requesting this Technical <br />Revision to the Permit for the reduction of the water surface area exposed to evaporation in the <br />Larimer Pit. <br />The purpose of this technical revision are numerous in nature. The main purpose is to remove the <br />exposed water surface area that is typical after a mining operation is completed. This will eliminate or <br />drastically reduce the evaporative loss associated with the typical pond. This will also reduce the <br />augmentation liability. In addition, with West Nile Virus a concern with local residents, the reduction <br />of standing water will be welcome. <br />The area in question is pit #8, which is located on the east side of Namaqua Avenue at the northern <br />end of the Larimer Pit. (See included map) It is proposed that the site have drainage ditches <br />constructed around the perimeter of this area after it has been mined of the sand and gravel deposits <br />overlying the bedrock strata. These ditches will capture the ground water seepage that typically flows <br />on the surface of the bedrock. The ditches will, in turn, drain to the culvert that drains into Cell #2. <br />This seepage would then drain into Cell #I via existing culverts. This seepage would finally exfiltrate <br />through the reclaimed banks of Cells #I and #2, as has historically happened prior to the mining <br />operations. Please note that Cell #I and #2 are located on the east side of Namaqua Avenue and <br />north of the Big Thompson River. Pond #1 and #2 are sealed ponds and are located on the west side <br />of Namaqua Avenue and north of the Big Thompson River. <br />