Laserfiche WebLink
April 30, 2013 <br />Mr. Berhan Keffelew <br />Division of Reclamation Mining and Safety <br />1313 Sherman Street, Room 215 <br />Denver, CO 80203 <br />RECEIVED <br />MAY n 17013 <br />DIVISION OF SAFETY <br />QN <br />Re: Permit Number M-2004-031 — Hazeltine Mine <br />Technical Revision Request Regarding Water on Neighboring Property <br />Dear Mr. Keffelew: <br />Aggregate Industires <br />West Central Region, Inc. <br />1687 Cole Boulevard, Suite 300 <br />Golden, CO 80401 <br />Telephone: 303 - 985 -1070 <br />INDUSTRIES <br />Aggregate Industries (AI) submits this letter together with the enclosed map and a check <br />in the amount of $216 as a request for a technical revision to the Hazeltine Mine permit <br />referenced above. This revision is proposed as an alternative to a revision previously <br />approved by the Division of Reclamation, Mining and Safety (DRMS) on January 16, <br />2013. Following that approval, AI operations personnel and the contractor for <br />performing the work under the revision re- evaluated alternatives for addressing the water <br />table issue for which the revision had been prepared. It is believed that the newly <br />proposed alternative would be a more effective means of relieving this issue. This <br />alternative would also alleviate the need for any disturbance to the Denver Water <br />property to the north of Hazeltine and thus eliminate the need to file an additional <br />technical revision of the permit associated with the Denver Water site. <br />AI proposes to install an agridrain on the east perimeter of the Hazeltine mine, providing <br />for 2.5 +/- feet surface water control. The water will be discharged into the mine <br />excavation via a 12 -inch diameter, 80 +/- foot long PVC pipe installed through the slurry <br />wall that has been constructed around the excavation area under the currently approved <br />reclamation plan. Water will then transfer through a 12 -inch diameter, 200 +/- foot <br />layflat pipe into the existing settling ponds and dewatering trench in the pit floor. An 88 <br />hp pump will be relocated 850 +/- feet west of its existing location and discharge through <br />a 12 -inch diameter pipe along the pit floor, up the slope and to an existing, approved <br />discharge point on the west boundary of the site to the South Platte River. The <br />approximate locations of the proposed surface water drainage system described are noted <br />on the enclosed map. <br />Mike Refer of AI and I spoke with you briefly regarding this proposal when we were at <br />the DRMS offices on February 14 to discuss another matter with Tony Waldron. At that <br />2 <br />AGGREGATE <br />An Equal Opportunity Employer <br />