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Office of Surface Mining 1981, and the finite-difference GRWATER computer model described in "Ground Water <br />Hydrology and Hydraulic" (McWhorter and Sunada 1977). <br />• (3) Permit applications may comply with the requirements of 2.04.5(1), 2.04.6(l)(a), 2.04.6(2)(a) and 2.04.7 <br />by providing accurate descriptive and predictive information relating to geology, water quality and quantity for the <br />area to be affected over the estimated life of the operation based upon extrapolation by an expert in the field from <br />documented data on the geology, water quality and quantity of similar areas, provided that the data used by the <br />RESPONSE <br />The information and analysis referenced above represents over five years of data collection in the permit and adjacent <br />azea by Federal and State agencies, private organizations and universities. Conclusions and opinions ofexperts of <br />each field may be found in the accompanying exhibits. The conclusions and opinions were derived by extrapolation <br />of the data collected in the perm it and adjacent areas. <br />RULE 2.04.6 -GEOLOGY DESCRIPTION <br />(1) General Requirements <br />(a) Define the relationship between structural geology and the occurrence, movement, <br />quality and quantity of potentially impacted surface and groundwater; <br />• (b) Assist in determining the feasibility of the proposed reclamation plan; <br />(c) Assess the potential for off-site material damage to the hydrologic balance; <br />(d) Assist in the preparation of the probable hydrologic consequence statement and the <br />establishment of the hydrologic monitoring plan; and <br />(e) Assist in the preparation of the subsidence control plan under 2.05.6(6). <br />RESPONSE <br />The information required by this rule can be found in the responses provided to Rule 2.04.6 (3). The text for this <br />response starts on page 2.04-12.1 and onto 2.04-19. This referenced section addresses the general geology <br />discussion required by this rule. Additional information addressing the hydrologic component of this rule can be <br />found in Rule 2.04.7. The text for this rule can be found on pages 2.04-19 through 2.04-43. <br />In reference to the geologic information presented and the overburden characterization associated with addressing <br />the feasibility of the reclamation plan it should be noted that the TCC facilities are located next to the Colorado <br />Yampa Coal Company reclaimed surface mine. The surface mine has been successfully reclaimed and the TCC <br />surface facilities will utilize the same resources and reclamation techniques as applied to the surface mine. <br />(2) Surface Mining <br />structure) within the proposed area to be affected over the life of the operation down to and including the first <br />. aquifer and other coal seams, if any, below the lowest coal seam to be mined. A geologic map with geologic <br />~n T i~~; ~ ~u,a z s zosn <br />PR 99-OS 2.04-12 5/25/00 <br />