PERMFILE139112

• Permit No: C1982056A
• IBM Index Class Name: Permit File
• Doc Date: 9/14/2005
• Section_Exhibit Name: 2.05 Operation and Reclamation Plans
• Media Type: D
• Archive: Yes

The perimeter of all areas affected by surface facilities will be clearly mazked before initiating surface
disturbance activities. The proposed shaft pad surface area is approximately 11.1 acres in size with
minimal cut and fills. The associated access road corridor is approximately 2,930 feet long, with a finished
top width of 24 feet (road corridor 35 feet wide, 2.4 acres). See Exhibit 25U, 6-North Mains Ventilation
Shaft - Geotechnical Pavement Design, for details on the road, and Map EX49A-M1, a new road profile
and cross-section.
Given an average topsoil depth of approximately 6 inches and a total road disturbance area of
approximately 2.4 acres, approximately 1,940 cubic yards of topsoil will be salvaged from the road
corridor, and 8,954 cubic yards from the 11.1 acre pad azea. Prior to initiating topsoil removal activities,
stream and wetland buffer zones will be mazked with identifying signs to limit surface disturbance within
these areas to the planned and approved activities. Topsoil from the road corridor will be recovered and
placed in a stockpile at the north end of the road corridor beyond the edge of the 35-foot road disturbance
area. Topsoil from the pad area will be placed in a stockpile within the shaft pad on the southwest edge of
the pad and along the west edge of the access road, just south of the pad, for future reclamation use.
Topsoil salvage volumes aze indicated on Table 49A. Natural vegetative materials (mulch) incorporated
into the topsoil, and seeding with the topsoil stockpile stabilization seed mixture identified on page 2.05-
121 will stabilize the stockpiled topsoil.
Following topsoil removal from ditch and pond areas, required drainage and sediment control structures
will be constructed or installed. Surface drainage for the shaft pad disturbance will be handled by two
downgradient ditches on the north side of the pad, compacted road-base surfacing of the shaft pad,
revegetation of cut and fill slopes and the topsoil stockpile, and a small, non-discharging sediment pond
that will completely contain three years-of sediment plus the runoff from the 100-yeaz, 24-hour
precipitation event. The sediment pond will be constructed by excavating the pond basin to depth. The
interior pond embankment slope (incised) will be constructed at 2SH:1 V or flatter. Design calculations
have been completed to determine the elevation corresponding to the 25-year, 24-hour storm runoff
volume. A marker will be placed in the pond at this elevation and any runoff accumulations above this
level will be pumped from the pond within 24-hours to maintain adequate stormwater storage capacity.
TCC will utilize a portable pump to transfer excess water accumulations from the pond to a water tanker or
apumper-truck, with the water to be hauled to the existing Pond D for final treatment and discharge, or
may use a portable pump to discharge the water from the pond to one of the utility boreholes, with routing
of flows to the abandoned underground mine workings. The limited road drainage will be handled by two
road drainage ditches, compacted road-base surfacing of the access road, revegetation of cut and fill slopes
and the topsoil stockpile, and two road crossing culverts. Active use areas will be graveled to control dust
and drainage, other disturbed areas (including topsoil stockpiles) will be stabilized with temporary
vegetation, and any structures will be painted in neutral earth-tone colors to blend with the natural
surroundings.
The access road follows the natural topography, generally consisting of rolling terrain, and will be gravel-
surfaced, so access road drainage control requirements aze minimal. Structures along the access road
include two road drainage ditches, compacted road-base surfacing of the access road, revegetation of cut
and fill slopes and the topsoil stockpile, and two road crossing culverts.
A typical road drainage ditch design is provided in Figure 2 of Exhibit 8X, prepared by Water & Earth
Technologies, Inc, August 2004. Two culverts are required to intercept and transfer flow from the runoff
ditches to limit runoff velocities in the ditches to less than or equal to 3.75 feet per second (fps). This
systems approach assures that the ditches remain stable with no channel scour or degradation during peak
flow events. All drainage calculations and documentation for the shaft pad, sedimentation pond, and
access road are provided in Exhibit 8X, and drainage structures are shown on Map 24 (Sheet 3 of 3).
TROS-48 2.05 - 45.66 09/05/05