PERMFILE103109 - Laserfiche WebLink

Home Browse Search

When the treatment facility is no longer needed it will be removed from the site. This will entail removal of the • building, aerators, intlucndpretreatment structure, and overflow structures. The remainder of the buried PVC will be left in place. The concrete pad for the building will be broken up and placed in the bottom of the ponds. The ponds will be backfilled and regraded with the overburden material to approximate original contours. The site will be topsoiled and reseeded with the approved mixture. The waste water treatment facility is permitted through the Colorado Departrnent of Public Health and Environment. The permitting process through the CDPHE required submittal of a site application. That application is presented in Exhibit 8-0, Waste Water Treatment Facility. Also, the approval received from the CDPHE is included in the Exhibit. TCC did not include any of the technical segments of the application in effort to conserve map paper. Compressor Buildine An air compressor building was constructed in the alley between the light duty bay and the shop. The location of the building is shown on Map 24, Surface Facilities. The building houses air compressors, dryer and controls, exhaust and tool storage area. The building was constructed by placing a roof over the alley and enclosing the front of the alley with a wall and doors. A borehole, approximately 150 feet in depth, was drilled from the alley into the underground workings. An airline was installed in the borehole, which delivers compressed air to the underground equipment. The borehole was a nominal 10-inch boring and cased with a 6" aluminum tubing. The tubing was grouted in place and connections made at the top and bottom for completing the airline. When the line is no longer needed the airline tubing will be grouted in place and the remainder of the facility • removed from the site. The usable equipment will be salvaged for later use. Site 109 Diversion The diversion will consist of a 6 inch PVC PIP irrigation pipe attached to the existing 109 riser. This line will be buried and will cross the existing berm immediately to the noRh of the 109 riser. From that point, the line will parallel the berm, crossing the roadway near the operations center at a depth of approximately 3 feet. Should ground conditions warrant it, an 8-inch diameter steel pipe will be installed to act as a protective sleeve for the PIP pipe where it crosses the road. The line will then be buried along the berm until reaching the east end of the heavy- equipment pad, where the line will make a 45' tum to the north and pass under the PM Bay access road. Again, a protective steel pipe sleeve may be installed should conditions warrant it. From the PM Bay Road down to the existing Site 114 vertical culvert the line will be buried to a depth of 6-8 feet. At Site 114, the existing culvert, which has been backfilled with washed rock, will be utilized as an infiltration point, with the line entering the culvert at a depth of not less than 6 feet. Water will then infiltrate into the spoils and replenish the aquifer prior to being pumped from Site i 14 to the million-gallon tank and thence underground. Line location is shown on Map 24. In order to increase operational flexibility, the Site 109 Diversion maybe plumbed directly into the line-feeding site 1 ]4. Therefore, when this option is exercised all the water from site 109 will be diverted to site 1 l4. An underground rock filter was installed along the six-inch water line at the location shown on map 24. The rock filter is needed to help filter the water discharged from the underground mine before it is placed into the million gallon tank. . The rock filter will be constructed by excavating the existing spoil material to a depth of approximately 15 - 20 feet and placing a gravel pack in the excavated area. Prior to excavating the spoil material the topsoil will be stripped APPROVES ApR 2 4 2000 Permit Renewal No.3 2.05-21 l ]/1/99