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<br />• <br />June 2S, 2001 <br />Colorado Division of Minerals and Geology <br />ATTN: James Dillie <br />1313 Sherman Street, Room 215 <br />Denver, CO 80203 <br />RE: Lawrence Construction Company <br />Lawrence Pit MinelDk: M-1974-041 <br />Dear Mr. Dillie, <br /> <br />RECrlVED <br />JUN 2 9 2001 <br />Division of Minerals and Geology <br />iii iiiiiiiiiiiiiiii <br />999 <br /> <br />AGGREGATE <br />INDUSTRIES <br />1 am writing this letter in response to the inspection you performed in May, 2001 at the above-referenced mine. <br />Aggregate Industries is currently a tenant et Lawrence Constructon Company's site located at 9002 North Moore <br />Road in Linleton, CO. <br />The last paragraph of your observations on page two (2) of your inspection addresses operations conducted by <br />Aggregate Industries - WCR, Inc. Before addressing the water problem you noted, for the record, l would like to <br />cored two of your observations. <br />First off, the products we process through our washplant are sand and rock, not crushed asphalt waste. Secondly, <br />water is not pumped from Plum Creek as stated in your observations. The water from the freshwater pond that <br />feeds the plant is actually water from the pondjust to the southeast. The water flows from our washplant into the <br />first pond where particles settle. Once the particles have settled out, the overflow enters the freshwater pond <br />where it is pumped to the wash plant for use again. This cycle is constantly repeated. <br />In response to the water problem you noted, Aggregate Industries has corrected the problem. At the time of your <br />inspection, the water percolating out of the stockpile of washed product was escaping through the rock bern [hat <br />was meant to dam it. Since damming the water was not successful, Aggregate Industries has dug a trench to <br />direct this water back into the freshwater pond. 1 have enclosed a diagram showing the corrective actions taken <br />by Aggregate Industries. 1 have also enclosed a copy of your inspection report for reference. Should you need <br />additional information, please feel free to contact me at (303) 716-5395. A copy of this letter will also be <br />submitted to the DMG with the technical revision for this permit. Thank you. <br />mcerely, <br />Deborah Fer, aro <br />Environmental Affairs Representative <br />Enclosure <br />CC: John Bockman, Lawrence Construction Company <br />John Kubic, WQCD, CDPHE <br />Damian Murphy, Quaries Operations Manager, AI <br />Bill Rose, Plant Manager, Lawrence Washing Plant, AI <br />Jamte W. Gaboriau,. Manager of Environmental Affairs, AI <br />Mike Refer, VP, Administration and Public Affairs, AI <br />file <br />Aggregate Industries <br />West Central Region, Inc. <br />3605 South Teller Street <br />Lakewood, CO 80235 <br />Telephone:303-985-1070 <br />An Equal Opportunity Employer <br />