PERMFILE116329

• Permit No: M1997054
• IBM Index Class Name: Permit File
• Section_Exhibit Name: EXHIBIT D - MINING PLAN
• Media Type: D
• Archive: No

Pazkdale Project • 2 • Reclamation Permit
There i know site specific data available on ater levels the vicinity of the Grave]
Baz Aggregate Pit. Review of the site's geology suggests that local water table in
aggregate will reflect [he Arkansas River stream elevation. All mining and reclamation
work will be completed in-the-dry. Berms and ditches will be used to protect
Tallahassee Creek from uncontrolled runoff from mining operations.
1.2 Granite Quarry
The Granite Quarry is located on the north side of Tallahassee Creek. A combination rail
and haul road crossing of Tallahassee Creek will be constructed to the Granite Quarry.
The crossing will utilize corrugated metal culverts or concrete pipe and the approaches z ~' ~
will be protected with riprap. A total of 28.3 acres will be initially disturbed at this site
which includes 18.1 acres of mining disturbance and 10.2 acres for granite processing
and stockpiling.
Initial activities at the Granite Quarry site will include topsoil salvage and placement into
a stockpile. As discussed in Exhibit I - Soils, some topsoil is available for salvage from
the nearly level processing area while little is available from the quarry site. The granite
quarry floor will be nearly level. The processing area will be graded to be free-draining
to a small sediment pond which will discharge via infiltration and through a check dam.
These erosion control measures will be maintained for the life of the project.
The Granite Quarry will be developed sequentially as a benched side hill cut. As shown
on the Mining Plan Map, the ultimate crest of the open pit would be at an elevation of
about 6,000 feet AMSL and the pit floor would be at an elevation of about 5,800 feet.
Pit high wall configuration will be controlled by several parameters, some of which
include geologic and geotechnical controls, equipment constraints and safe operating
practices. Bench heights and widths are determined by mining equipment limitations and
the results of slope stability analysis. As mining progresses, slope movement monitoring
will be instituted to evaluate the safety of high walls. In addition, operational procedures
for controlling blasting and bench scaling will be instituted to facilitate mining of stable
pit walls.
Granite will be mined by conventional open pit methods including drilling, blasting,
loading and hauling. Blasting will be performed only during daylight hours and under
strict safety procedures as required by the Mine Safety and Health Administration
("MSHA"). Scaled distance formulas will be used to establish safe seismic disturbances
and air blast limits.
Broken granite will be mined with an end loader. The end loader will dump the rock
directly into haul trucks, place it in stockpile or feed it to several grizzlies. Grizzly
produced product will feed either acrushing/screening system or it will be transported to
the processing plant at the gravel bar. Grizzly sized product will be stockpiled for use as
riprap. The processing area at the granite quarry will include the grizzlies, crushers,
screens and various material stockpiles.