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cpe'! ~f"G~~~i, inc. March 17, 2004 l~ Mr. Jeff Deatherage, PE State Engineer's Office 1313 Sherman Street. Room 818 Denver, CO 80203 / RE: Application for Substitute Supply Plan for the Duckworth Pit, )\7-03-091 Dear Mr. Deatherage: On behalf of Lafarge ~O~est, Inc. (Lafarge). Applegate Group, Inc. requests approval of a substitute water supply plan pursuant to Section 37-80-] 20 (2) C.R.S. for the Duck~~~orth Pit sand and grate el mining operation. The applicant can be reached at Lafarge West, Inc. Mr. Eric Reckentine 1400 W. 64's Ave.. P.O. Boa 2l 5001 Dem•er. Colorado 80221-0599 (30.) 657-4330 A check made out to the Division of Water Resources for 51343.00 for the gravel pii substitute supply plan review is enclosed. A «ravel pit well permit application and the required S480.00 fee will be submitted in a separate letter. PROJECT DESCR1PT1ON The Duckworh Pit is located along Boulder Creek southeasi of Lon~nont in Section ] 6. T2\. R6SW, 6'~ P.M. Figure No. 1 is a vicinity map ofthe Duckworth Pit mining site. The operation will impact the Boulder Creek with depletions from evaporation of exposed groundwater, moisture lost in the mined material. and from dust control used on site. Lafarge is scheduled to complete mining of the existing agt,~egate reserves at the adjacent Cottonwood Pit, M-88-042, during 2004 (Figure No. 1). The mining operation will shift to the Duckworth Pit as the new source of aggregate. Instead of building new processing facilities, it is more cost-effective for Lafarge to convey the mined material to the existing facilities at the adjacent Cottomvood Fit for processing. There will be two mining cells at the site. Lafarge kill commence operations in a 12-acre eastern ~' .II.!~~ tc,. ., ._. '~~,,.~;, ~.: _. ;.uilE _.. (3031 e;.-fal •-Fp. ..... 4',_.. -. Derr, e' ~C,, :rztl: 9'; 23.:-Z-__` wwv: ac=:c-ateg 1~Vp ..'^'