1987-03-10_PERMIT FILE - C1981008A

• Permit No: C1981008A
• IBM Index Class Name: PERMIT FILE
• Doc Date: 3/10/1987
• Doc Name: Application & Table Of Contents
• Media Type: D
• Archive: Yes

NUCLA PR NO. 2
pipe with the orifice opening cut on the side of the riser pipe to be an
effective and efficient design of a combination principal and emergency
spillway, while at the same time providing adequate detention time and
an automatic dewdtering device. Peabody has committed to providing
trash racks over the principal and emergency spillway openings;
therefore, clogging of the pipe should not be a problem.
In conclusion, Peabody does not feel OSM's requirement is contained in
CMLRD's Rules and Regulation; nor does Peabody feel OSM's requirement is
required based on the design objectives of the regulations. Therefore,
Peabody requests approval of Pond 007's principal and emergency spillway
ds designed.
Tab 14 - Blasting
Comments :
1. Pages 14-5 and 14-6 indicate that 7 dwellings are located within
1 ,000 feet of the proposed blasting area and that 2,300 feet of
sewage line is located within 500 feet of the proposed blasting
area. Because of the close proximity of these structures, the
requirements of Rule 4.08.4(7) are applicable. Based upon the
information submitted to the Division at this time, the Division
will not approve blasting within 1,000 feet of any of these
dwellings or within 500 feet of the sewage line. In order for the
Division to consider lesser distances, it will be necessary for
Peabody to perform a pre-blast survey of each dwelling and of the
sewage line. Also, Peabody will have to perform a comprehensive
determination of what blasting load levels would preclude damage to
these structures. The standard equation addressed in Rule
4.08.4(10)(b)(i ) may not necessarily be acceptable due to the close
proximity of these structures to the proposed blasting area. Also
data from seismic recordings needs to be submitted to substantiate
Peabody's position. Peabody should consider performing monitoring
of blasting on portions of the permit area which do not fall within
the restricted proximity.
Response:
As discussed with Jim Pendleton and Sue Mowry, CMLRD, Peabody is
performing field tests at the Nucla Mine and will be correlating this
data with expected mining conditions and proximity of adjacent
structures and facilities at the Nucla East Mine area. Upon completion
of these tests , response to this comment will be submitted to the
Division.
Tab 15 - Hydrologic Monitoring
Comment:
1. Please submit lithologic logs for Wells GW-N14, GW-N15, GW-N18,
GW-N20, GW-N21, and GW-N17P.
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