PERMFILE67084 - Laserfiche WebLink

Home Browse Search

Mr. Bob Oswald • • June 29, 1999 Page 3 of 4 antifreeze and other distillate products used at the mine will be stored in metal drums within a spill containment compound. 9. When drilling a new ventilation shaft, the rock cuttings produced resemble crushed gravel; therefore, much of the material will be used to improve underground road surfaces. Should a condition occur which requires all of the rock drill cuttings to be delivered to the surface, storage thereof would only require an approximate area of 15,000 ft'. 10. The electric transformers/transformer stations are owned by fUSA or IUC Colorado Plateau and are non-PCB contaminated and placarded as such. The metering base is established approximately 100 feet from this location and installed on the public utility company support pole. 11. Groundwater encountered during the mining process will be used to suppress dust, and thereby remain in the original aquifer from which it emanated. This will result in no significant withdrawals ofgroundwater. 12. Dimensions of the Van 4 Shaft are such that it may accommodate approximately 1,500 tons of waste rock material to be removed from the waste rock storage area which contains +50,000 tons, therefore, an alternate shaft closure method was not considered. Similarly, the ventilation shafts will be filled with waste rock from the waste rock storage area. No material is known to exist or is forecast to be used or installed which will require special disposal requirements. Description of the ore bin, steel headframe, hoist building, compressor building and hoist machine with their support foundations is described in the January 13, 1999, CDMG Pre-Operation and New Application Inspection Report. All of these items hold some salvage value, which will offset ftiture reclamation expense. Topsoil, salvaged and placed in stockpile to date contains approximately 88,000 ft' and will be placed as a thin veneer over the disturbed area during reclamation to help propagate new plant growth. An attempt will be made to distribute topsoil to all disturbed areas. Only minor, low profile berms, water bars or ditches will be maintained on the waste rock storage area to control or direct surface water. Other shallow ditches will be installed to direct surface water away from the disturbed area. Each ventilation shaft site will include installation of a six feet. diameter, four feet. high circular steel fan enclosure and a electric switch box (size No. 3 or No. 4), all of which will be placed on a 10 ft. X 10 ft. concrete support foundation approximately 8" thick. The electric transformers, three each/75 kW, will be of Pole-mount line type and installed on the electric transmission line support poles. The short (10 ft.) section of steel ventilation shaft casing will be removed during the reclamation of the site. Several small fence enclosures (approximately 400 lineal feet) will be removed during reclamation.