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<br /> <br /> <br /> <br /> 33 <br /> <br /> The surface recharge capacity of the alluvial material in Scullion Gulch may be <br />reduced due to the construction of cuts and fills in the portal areas. This <br />disturbed area is small relative to the total area of Scullion Gulch and therefore <br />impacts are expected to be very minor. <br /> <br /> Due to the presence of Kenney Reservoir, water withdrawal from the White <br />River lagoon will not cause measurable drawdown in the alluvium at the well <br />field site. The quantity of water that will be pumped is less than one percent of <br />the low flow of the river. <br /> <br /> In summary, the impact of mining on the ground water hydrologic system will be <br />minimal, primarily because of the limited amount of ground water that is <br />naturally found in the area. <br /> <br /> Other than the Deserado Mine, there are no permitted coal mining operations in <br />the State of Colorado presently situated within the drainage basin of the White <br />River. Therefore, no significant cumulative hydrologic impacts upon the White <br />River are expected in Colorado other than those predicted to occur as a result of <br />the mining activities at Deserado Mine. The Division finds, in accordance with <br />C.R.S. 34-33-114(2)(c) and Rule 2.07.6(2)(c), that the operation has been <br />designed to prevent material damage outside the permit area. <br /> <br />IV. Topsoil-Rule 4.06 <br /> <br />A. The Division previously found that the proposed “reverse sequence soil <br />replacement” plan, in conjunction with the proposed field trials, is appropriate for <br />refuse area reclamation, pursuant to 4.06.2(4)(a). This finding is based on field <br />observations of topsoil and subsoil stockpile vegetation cover, evaluation of <br />topsoil and subsoil chemical and physical characteristics, and observation and <br />evaluation of RP-1 revegetation data. The subsoil will be more suitable for <br />sustaining desired vegetation than the available cheatgrass-infested topsoil. Within <br />the refuse areas, a minimum of one foot of topsoil will be replaced, with a <br />minimum nontoxic cover (topsoil and subsoil) thickness of 30 inches. The operator <br />has committed to document that suitable quantities of topsoil/cover material are <br />being salvaged. <br /> <br />V. Sealing of Drilled Holes and Underground Openings-Rule 4.07 <br /> <br /> Sealing of wells, holes, and other openings is discussed n Section V.F of Vol. 4 of the <br />permit application. <br /> <br />A. Underground openings requiring sealing at the mine include mine portals, mine <br />shafts, groundwater monitoring wells, one alluvial water well, gas injection <br />boreholes, breathable air holes and vent degasification wells. The Division will <br />require that each hole, well, or other underground opening be capped, sealed,