PERMFILE52862

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

Exhibit D CMLRB 112 Permit Application
Agile Stone Systems. Inc.
• to result in acid mine drainage (AMD) or any phosphate bearing minerals were found in
any of the sample locations. (Azurite, Inc., 11/97)
GRANITE
The Pike's Peak Granite will be mined north of the Tallahassee Creek drainage. The
granite outcrops along major fault lines delineating the margins of the Precambrian age
rocks with the Mesozoic sediments along high angle thrusts or reverse faults (Johnson,
1953). The granite rock has been described by Heinrich (1948), "as a red, coazse-
grained, porphyritc granite". The ground mass consists of quartz, oligoclase and biotite.
Well formed phenocryst of red microcline aze set in this ground mass matrix. The granite
area to be mined was sampled to 15' below the existing surface at different locations and
traversed at a number of locations to ascertain the variance in grain size and mineralogy.
The granite area proved to be quite consistent in grain size and mineralogy, primarily k-
feldspaz, quartz, and biotite, in order of abundance. Other than small zones of finer
grained feldspaz rich intrusive dikes, very little other mineralogy was noted. Only typical
background trace amounts of sulfide minerals could be found in the granite mining area.
Crushed granite rock samples prepared for mechanical testing allowed for close
inspection of un-weathered granite rock over a relatively large sample area showed only
trace amounts of any sulfide minerals typical of Colorado granite deposits. Hand tense
inspection of the crushed granite samples noted only a minute occurrence of iron sulfide
in only one grain of dozens of crushed samples containing tens of thousands of grains.
Azurite, Inc. (11/97) concluded that the granite rock proposed to be mined is not a
• potential source of AMD or of any type of heavy metals due to the type of rocks present.
The granite rock is potassium feldspar, quartz, and biotite with very small amounts of
accessory minerals of siliceous composition.
SANDSTONE
The sandstone quarry plan involves the extraction of decorative and building stone from a
3 acre site located within the Dakota Group of sandstones and shales. A small operation
extracting dimensional materials is planned. The operation would use limited drilling
and blasting and possibly the "feather and wedge" method to remove blocky sandstone
product from along the exposed bedding planes. These bedding plane only dip 30
degrees to the west and aze only one to several feet thick. Conventional mine benches
such as those noted in the granite quarry will not be used. Access ramps to the upper
areas of the sandstone outcrop and level loading areas will be developed. There will be
no remaining highwalls and any final slopes will be no steeper than 1:1. Vertical lifts aze
typically expected not to exceed much over 8'. The sandstone materials are siliceous rich
materials with typical desert varnish (dark) and reddish yellow oxide staining on the
surface. No metal bearing minerals aze present that might result in causing any AMD
conditions. No phosphate bearing rock units were noted in any of the proposed mining
areas. (Azurite, Inc., 11/97)
1.5 SEISMIC STABILITY
The area is well documented for its striking geologic structure and interesting geologic
• history. The evidence of large feature faults which separate vast spans of geologic time
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