PERMFILE41904

• Permit No: M2004067
• IBM Index Class Name: Permit File
• Doc Date: 8/19/2005
• Doc Name: 2nd Adequacy Response
• From: Banks and Gesso LLC
• To: DMG
• Media Type: D
• Archive: No

MMRR Quarry, M-2004-067
Response to June 30 Adequacy Review (as amended)
August 19, 2005
Page 4
Exhibit D -Mining Plan
3. The applicant has committed to conducting drilling and blasting operations at the quarry such
that these operations will result in the reclaimed highwall and benching configuration at all times
throughout the mining phase of the quarry. The Division notes that this commitment will become
an enforceable component of the mining and reclamation plan and that any deviation from the
approved, reclaimed highwall and benching configuration if found during a site inspection will be
considered by the Division to be a violation of the mining and reclamation plan. As an option, the
applicant may provide an estimate of the amount of drilling and blasting needed under a "worst
case" scenario when the desired highwall and benching configuration has not been achieved
during mining and be bonded for such disturbance. Please respond.
The applicant intends to incorporate the flexibility noted by the Division in its
comment above. We have therefore estimated the amount of drilling and
blasting required to create the longest possible continuous highwall segment
within the proposed mining plan. In such a "worst case" scenario, the greatest
amount of work that would need to be performed for bonding purposes is the
amount of drilling and blasting needed to set the highwall with a bottom contour
of 7325 feet, as shown on Exhibit C-2C. Drilling and blasting for this bench will
generate the largest amount of material of any drilling and blasting scenario
following default on a bond. The dimensions of this bench are 50 feet in height,
36 feet in cross-section, and 2,606 linear feet along the quarry face. Removal of
this bench yields 173,733 cubic yards of material.
Further discussion of bonding is found below in response to adequacy comment
40.
4. In conformance with Rules 6.4.4(d) and 6.4.4(e)(ii), please describe the number of linear feet of
drilling required and volume of rock removed during a typical blast sequence.
The drill pattern for a typical blast sequence involves eighteen drill holes, in two
rows of nine holes each parallel to the working face of the quarry. With a depth
of 50 feet for each drill hole (the height of each highwall), the cumulative drilling
depth to set each typical blast sequence is 900 linear feet (50 feet x 18 holes).
The volume of material to be removed during the drilling of blast holes is the
volume of eighteen 50-foot holes, with a diameter of 6.5 inches for the drill
apparatus. Each hole generates 0.43 cubic yards of rock, with a total yield over
18 holes of 7.74 cubic yards per typical blast sequence.
5. In conformance with Rules 6.4.4(d) and 6.4.4(e)(ii), please describe the volume of shot rock to
be generated during a typical blast sequence at the MMRR Quarry.
The typical pattern of drilling voids described above in response to adequacy
comment 4 allows for the placement of approximately 9,500 lbs. of powder,
corresponding to a yield in shot rock of approximately 9,500 cubic yards per
typical blast sequence.