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1 <br />'~ I A I I OI (J UI r)Il AI ii 1 qil nnNl~ I~, I nMM, i~.~v •a ~i~~~ <br />D FI'ARTMENT OF NATURAL RFSOU R(:ES III III III III IIII III <br />U Monn Pascoq E. Brut rve Direcin~ <br />999 <br />MINI':I- I„1N I) lil?I:LA A1A7'Il)N <br />423 Centennial Building, 7313 Sherman Street <br />Denver, Colorado 80203 Tel.(30~) 839-3567 <br />David C. Shelton <br />Director <br />March 3, 1981 <br />T0: Brian Munson <br />FROM: Jim Pendleton <br /> <br />SUBJECT: Blasting and Waste Disposal Aspects of the Hayden Gulch Coal Mine <br />Permanent Program Application <br />Pursuant to your request I have completed a preliminary review of the blasting <br />and waste disposal geotechnical aspects of Yampa Coal Company's permanent program <br />application for the Hayden Gulch Surface Coal Mine. I forward the following <br />comments for your consideration. <br />Specific Application Deficiencies: <br />2.05.3(6) Overburden: <br />1. No narrative explaining removal, handling or storage of all overburden materials <br />is presented within the application. <br />2. No statement of volumes or swell factors anticipated for the excess spoil <br />and overburden are included within the application. <br />2.05.3(6) <br />(a) Surface Blasting Plan: <br />No. general narrative explaining how the applicant intends to comply with the <br />performance standards of Rule 4.08 is included within the application. <br />Specific deficiencies of the blasting plan include: <br />1. A statement of whether or not any residence exist within one half mile of the <br />planned blasting and whether or not any pre-blasting survey will be conducted. <br />2. If a pre-blast survey were required, the applicant should explain how they <br />intend to perform this survey as required by sec. 4.08.2. <br />3. The application should include a statement of intended conformance with <br />blasting schedule publication as required by Rule 4.08.3. <br />4. The applicant should include the statement that the applicant intends to <br />conform with the surface blasting conformance standards of nearby resident notifi- <br />cation (4.08.4(4)), access control (4.08.4(5)), airblast limitation (4.08.4(6)), <br />safety buffer zones (4.08.4(7)), flyrock control (4.08.4(8)), hazard prevention <br />(4.08.4(9)), and maximum peak partical velocity limitation (4.08.4(10)). <br />2.05.3(5) <br />(b) Waste Disposal: <br />1. The excess spoil pile design must be certified by a registered professional <br />engineer. No engineers name or registration number nor certification are con- <br />tained within the application. In addition those map and Bross section exhibits <br />