Laserfiche WebLink
_29_ <br />notification. The explosive loading proposed conforms with the limitations of <br />Rule 4.08.4(10)(b>. Explosives storage facilities are depicted on Map 5-1 of <br />the amended permit application. The proposed blasting plans are found to <br />conform with the requirements of Rules 2.05.3(6) and 4.08 of the permanent <br />program. <br />XVI. Backfillina and Grading - Rules 2.05.3(6). 2.05.3(9). 2.05.4(2)( <br />The amended permit application for the Carbon Junction Mine contains a <br />description of the relatively complex mining plan to be utilized at the Carbon <br />Junction open pit. The pit, while small (covering approximately 40 acres), <br />involves a complex truck and shovel/loader operation augmented by scrapers and <br />dozers. The operation involves opening an initial steady state pit of <br />approximately 3 million cubic yards. Initial cut material will be placed in a <br />permanent excess spoil fill, projected to reach a final volume of <br />approximately 2.837 million cubic yards. Following completion of the steady <br />state pit, a cut and carryback operation will exist. Material excavated from <br />additional cuts will be deposited into previous cuts, backfilling the pit <br />progressively to the northeast. In the event that the final cut requires <br />additional material to achieve original contour, material will be hauled from <br />portions of the excess spoil pile existing above the elevation of the final <br />reconstructed stream channel. <br />The applicant projects a bulking ratio which results in an excessive <br />overburden volume of approximately 2.75 million cubic yards. The applicant <br />proposes to accommodate the excess material in a permanent overburden spoil <br />pile of 2.837 million cubic yards. The amended application document clarifies <br />the movement of overburden material during the planned operation. Coal and <br />overburden material balance and movement volumes are tabulated on Table 5-4 of <br />the amended permit application. <br />In response to adequacy comments made by the Division, Pueblo Coal, Inc. has <br />committed to conducting a pre-mining survey to establish horizontal and <br />vertical control for the mined area. In conjunction with this survey, Pueblo <br />Coal, Inc. will conduct profile surveys of the pit/fill landscape slated for <br />disturbance during the mining process. Pueblo Coal proposes to conduct <br />profile surveys along profiles no greater than 500 feet apart and oriented <br />more or less parallel to the geologic cross-sections presented within the <br />permit application. Points along each profile would be located every 100 feet <br />and elevations determined. Pueblo Coal, Inc. further proposes to perform a <br />quantified swell factor determination, upon reaching the steady state pit <br />situation. If the actual overburden swell factor is determined to be <br />significantly greater or less than the estimated 49%, then the mine and <br />reclamation plans would be amended and submitted to the Division by Pueblo <br />Coal, Inc. The profile survey will be conducted on an annual basis. <br />The Division deems it appropriate, in order to assure compliance with the <br />requirements of the regulations, to impose the following stipulation upon <br />permit approval for the Carbon Junction Mine. <br />