2010-05-07_PERMIT FILE - C2006085 ‎(2)‎

• Permit No: C2006085
• IBM Index Class Name: Permit File
• Doc Date: 5/7/2010
• Section_Exhibit Name: 2.05 Operation and Reclamation Plans
• Media Type: D
• Archive: No

- The final pile configuration will achieve a minimum static safety
factor of 1.5.
Waste material will be spread in layers no more than 24 inches in
thickness.
Waste material will be placed and compacted to attain 90 percent
of the maximum dry density to prevent spontaneous combustion
and to provide the strength required for stability of the pile.
The final graded waste bank will have 2H: IV, or less, side slopes.
The proposed waste pile will have 3H:iVside slopes.
Following final grading of the waste pile, the entire pile will be
covered with a minimum of 4 feet of the best available non -toxic
and non - combustible material. The approved topsoil replacement
depth is included in the 4 feet of cover material.
Northfield obtained core samples to provide geochemical data on the
roof, floor, interburden, and coal for the Ocean Wave seam. No
significant quantities of toxic or acid - forming materials were found
based on sample data from these strata that would be incorporated in
the waste pile, as described in Section 2.04 of the permit application.
Relevant core analytical data supporting these statements is
included irf'�xhibits O _G, and AI . The data support the conclusion that
construction of t e waste pile will not adversely impact the hydrologic
balance.
Northfield will provide a detailed design plan to the Division for the
waste pile, prepared in accordance with Rule 2.05.3(ii), at least six
months prior to commencing construction. The Division shall have
approved, in writing, the engineered plan for the waste pile before
construction of the pile begins.
Mine Roads
The mine entrance road is the only road planned to connect the primary
mine facilities area to the public road system. This road will be
constructed and maintained as a graveled haul road from County Road
79 to the location of the raw coal stockpile in the facility area. Coal will
be loaded into haul trucks and weighed at the truck scale within the
mine yard area. From the scale area, trucks will travel by way the mine
entrance road to County Roads 79 and 11A, and State Highway 115, to
reach coal customers.
Northfield will maintain the mine entrance haul road on a regular basis
to provide a smooth operating surface, ensure safety, and minimize dust
emissions. Maintenance will include periodic grading to provide a smooth
surface and remove snow, rocks or other debris, repair and resurfacing
as necessary, inspection and clean -out of any drainage
2.05 -19 Revised 4/12/10, TR -01