Laserfiche WebLink
STATE OF COLORADO <br />DIVISION OF MINERALS AND GEOLOGY <br />Department of Natural Resources <br />1313 Sherman St., Room 215 <br />Denver, Colorado 80203 <br />Phone: (303) 866-3567 <br />FAX: (3D3) 832-8106 <br />Mazch 11, 2003 <br />DIVISION OF <br />MINERALS <br />GEOLOGY <br />RECLAMATION <br />MINING•SAFETY <br />C. Clelhn Scott Bill Owens <br /> <br />Senior Environmental Engineer Governor <br /> <br />COlOWYO COaI Mlne L.P. Greg E Watcher <br />Executive Direttor <br />5731 State Highway 13 Ronald W. Canany <br />Meeker, Colorado 81641 Division Director <br />Re: Response to the CDMG Complete Inspection dated 2/19/2003, by Byron Walker for Permit <br />No. C-81-019 <br />Dear Mr. Scott: <br />Thank you for your letter of February 25, 2003, subject as above, and other information you <br />provided by telephone and a-mail. Please find attached a copy of my reconstruction of the blast <br />of 2/16/03, 4:04 PM, Cut No. 63, Station 34+00 to 44+00. This reconstruction was based on <br />information attained during the coal complete inspection of February 18, 2003, and the <br />information subsequently made available to the Division by Colowyo Coal Company, L.P. <br />First, the time, to a tenth of a millisecond that it took from a common point of initiation for a <br />hole to be detonated, was calculated. The parameters and values used, and the conclusions of this <br />step, are presented in Enclosure 1. Second, an 8-millisecond time period was progressively <br />applied throughout the duration of the blast to determine those holes that were detonated during <br />an 8-millisecond time period; and, in turn, the pounds of explosive that were detonated within <br />any 8-millisecond time period. This step is presented in Enclosure 2, <br />Please review the reconstruction for accuracy, based on our mutual acquisition of information, <br />and provide me with your assessment of the reconstruction. May I have your response by March <br />17, 2003? Please call on me if you have any questions. <br />Yours truly, <br />~ ~ ~~ <br />Byrcafi Ci. Walker <br />Environmental Protection Specialist <br />Cc: Dan Hernandez, CDMG (e-mail) <br />Files: C-81-019 (elecfronic, general correspondence) <br />C:\WPDOCS\Colowyo\blast review letter.doc <br />