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-4- <br />General Description of Hydrology and Geology <br />2.04.5 - page _32 - 1.1ap D-800 and D-801 <br />1. P1aps D-800 and D-801 must be certified by a qualified registered professional <br />engineer or a professional geologist. <br />2. Please define the geologic mapping unit Qca - Coalluvium as found on your <br />regional geologic maps. IJhat is Coalluvium? <br />3. Please identify the mapping unit found in section 16, 17, and 18 of "gap <br />D-800 (Geology). There is no symbol for the area mapped. <br />4. Receiving hater Quality listed on Table 2.4.2-1 does not indicate ~•~hen <br />(month and year) the samples ~~ere taken. If rare data on each of the samples <br />is available it should be submitted, this ~•~ill enable the Division to assess <br />seasonal variations of ~~ater quality. If there are reported flo~•is for each of <br />the sample sites at the time of sampling, this information is also needed. <br />Also, the locations of the sampling sites need to be identified on a map. <br />Geology Description <br />Section 2.04.6(2) - page 36-38, 7-G <br />1. Cross Section Figure 2 in appendix 7-G is insufficient to satisfy the require- <br />ments of section 2.04.6(2). This cross section is incomplete, and confusing. <br />Specifically, this cross section must be identified on a base map showing the <br />location of A A'. The cross section must identify all strata of rock from <br />the Rollins Sandstone to the surface. There are several intervals of strata <br />between seams that are not identified. Coal rider seams mentioned in the <br />litholoaic logs are also not identified on a cross section. The drill holes <br />M-1, P1-2, M-3, and M-4 are not indicated on this cross section. 41hat do the <br />symbols LM-1, CR-1, and CR-11 correspond to? The thickness of all coal seams <br />including rider seams should be listed or identifiable on a cross section. <br />Additional information on the extent and thickness of the Stoney Ridge, Thompson, <br />and Lake Ridge Seams must be included. <br />2. In general, your cross section must be revised to include geologic information <br />on all strata and coal seams. It should be drawn at sufficient scale to enable <br />the Mined Land Reclamation Division to distinguish clearly the relative positions <br />and thickness of all strata. Drill hole positions, identification numbers, and <br />elevations should be indicated to enable us to comparelithologic logs Faith the <br />cross section. <br />3. Additional cross section(s) will be needed to characterize the geology of <br />the entire underground workir~gs of mine No. 1 and No. 3. These additional cross <br />section(s) should be at a north-south orientation to enable the Division to <br />visualize a three-dimensional geologic picture. <br />4. The geologic cross section should indicate areas that were mined out both <br />by Snowmass coal and also by previous adjacent mines. (i.e. Sunshine 11ine, <br />Anderson Mine). lJithout this information we do not know whether or where you <br />will be intercepting other mined out areas. <br />