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S T4Tt Or COl OHAnO ins nN~l~ II ~M l.~~a ••~n n. <br />DEPARTMENT OF NATURAL RESOURCES <br />D. Monte Pastoe, E><ecu rive Director <br />muv~:r~ ~.aNU itH;l:LA11lA'r1uN <br />423 Centennial Building, 1313 Sherman Street <br />Denver, Colorado 80203 Tel (30;3) 839-3567 <br />David C. Shelton <br />Director <br />To: Mike Savage j~~ti~0 <br />From: Robert Liddle <br />Re: Trinidad Basin P.A.R. <br />Date: May 5, 1991 <br />Geological Description (2.04.6) <br />1. The applicant references a map of locations of core samples and grab <br />samples that was submitted in a previous application. The specific <br />information required under 2.04.6 must be included in the application, <br />not referenced. TBM must supply, as part of the application, a map which <br />clearly identifies the location of all drill holes used to construct <br />cross-sections, to supply samples of overburden, and holes which correspond <br />to lighologic logs presented in the application. The elevations of all <br />drill holes should also be indicated on a map. <br />Z. Geologic cross-sections presented in drawing IV-1, 2, 3 are insuf- <br />ficient to satisfy the requirements of 2.04,6(1)(a). The cross-sections <br />must identify the depth and thickness of all coal seams including the <br />thickness and location of any coal or rider seams above the seam to be <br />mined. The cross-section must also identify each stratum in the over- <br />burden down to the stratum immediately below the lowest coal seam to be <br />mined. The drawing must also locate all aquifers in the overburden. <br />The drawing should be at a sufficient scale to allow the Division to <br />make accurate measurements of the stratum, The drawing should also <br />identify which drill holes were used to construct the cross-sections <br />and the accompanying Zithologic logs should be provided, <br />3. The applicant must provide a discussion of the physical properties <br />of each stratum within the overburden. The discussion should include <br />information on swell and texture. This information is needed to assess <br />compactibility, erodibility, and overall swell. <br />4. The chemical analysis of the overburden does not clearly correspond <br />to locations on the geologic map and lithologic logs. This information <br />should be organized so that it is clear where the analysis came from <br />(location on a map) and clear as to which strata was sampled (corres- <br />ponding lithologic log). <br />5. The overburden parameters analyzed are incomplete. The applicant <br />must analyze for the complete list of parameters. A copy of the required <br />