2008-01-11_PERMIT FILE - C1982056A (2)

Home Browse Search

movement of air in the pressure relief/accumulator pipe but prevent fluid discharge, at some point in the future. So long as no discharge is anticipated or occurs, the provisions of Rule 4.05.2 are not applicable. When the holes are no longer needed, they will be grouted from the bottom of the casing to within three feet of the surface. The remaining four feet of casing will be cut off and discarded and then the area graded, topsoiled and seeded as per the approved plan. The holes will be located within the existing vent shaft pad disturbance area. Concurrent with road construction, a power distribution line was extended from the existing substation to the pad-mounted transformer at the shaft site. The power distribution line is approximately 3,600' long with a total of 12 power poles. In order to minimize potential environmental and aesthetic impacts associated with the NW Mains ventilation shaft and fan installation, surface drainage at the shaft site is handled by an upgradient diversion ditch, perimeter berms, pad topsoil stockpile collection ditches, gravel surfacing, and a sump with rock check dam and vegetative filter, under an SAE. The limited road drainage is handled by designed drainage structures. Active use areas are graveled to control dust and drainage, other disturbed areas (including topsoil stockpiles) are stabilized with temporary vegetation, and structures are painted in neutral earth-tone colors to blend with the natural surroundings. As shown on Map 23, additional entries were driven to the north from the ventilation shaft site. These entries are needed to maximize the efficiency of the ventilation system. The entries were driven in the same manner as TCC's development work, i.e. continuous miners and shuttle cars. 18-Right Ventilation Shaft (TR 04-44, TR05-50, MR04-190, MR05-200, MR07-225) As mine development has proceeded to the north, the distance from existing mine ventilation fan installations has increased to the point where an additional intake ventilation shaft is necessary to maintain effective ventilation of active mining areas. The new ventilation shaft is located adjacent to Fish Creek in Section 10, TSN, R86W on a low rise above the Fish Creek drainage, as shown on Maps 23 and 23B. Development, construction, and installation of the ventilation shaft and fan installation (Figures 30 and 30a) involved the following sequential activities: • Completion of environmental and engineering investigations • Placement of disturbed area markers • Marking of stream and wetland buffer zone • Temporary drainage and sediment control measures • Recovery and stockpiling of available topsoil • Installation of drainage and sediment control structures • Construction of an access road and site preparation for shaft pad • Drilling of shaft pilot hole and grouting operations (as necessary) • Construction of temporary power • Construction of shaft collar structure and temporary drilling equipment pad • Shaft boring and casing operations • Erection of escape hoist buildings and equipment and installation offence(s) • Installation and connection of escape hoist control equipment and systems ~s Installation of shaft heater and associated ancillary equipment • • Driving of additional entries at the back of the 18 Right longwall panel • Final clean-up and dressing of roads and site pads MR07-225 2.05-45.3 11/13/07