GENERAL31616

• Permit No: C1981020
• IBM Index Class Name: General Documents
• Doc Date: 3/10/1993
• Doc Name: PROPOSED DECISION & FINDINGS OF COMPLIANCE FOR RN2
• Permit Index Doc Type: FINDINGS
• Media Type: D
• Archive: No

Because of the high erosional velocities anticipated for the
post-mining configuration, it would be advantageous to construct a
permanent structure in the reach of the stream that would experience
the greatest erosion. For this reason, a stipulation was attached to
the initial five-year permit (Stipulation No. 16) which required the
permittee to submit a plan to the Division for "the installation of a
structure that would demonstrably dissipate the energy of flow in the
channel such that erosion of the channel will not occur." The
permittee submitted a plan proposing the use of 3.5 ft. diameter or
larger stones as rip-rap in the channel to provide adequate energy
dissipation and preclude erosional velocity. This plan was
subsequently approved by the Division, thereby satisfying the
requirements of Stipulation No. 16.
Upon termination of mining, or following completion of the rail spur to
the central facilities area, Salt Creek Mining Company proposes to
return the Loma loadout facility to the land use which existed prior to
the coal loadout operation (storage and rail loading facility). This
is specified in Article 32 of the lease agreement between the applicant
and the D&RGW Railroad Company (see Exhibit C-VIII, Appendix C, Volume
IV of the application). All structures will be removed. Coal will be
removed form the site and deposited at the McClane Mine or Munger
Canyon Mine site to be covered during reclamation. The surface will be
graded to a smooth condition.
IX. Revegetation - Rule 2.04.10
Baseline vegetation information for the Munger Canyon Mine can be found
in Section 4.8 of Volume I, Sections 3.1.1 and 4.5 of Volume VI, and on
Figure 4.5-1s of Volume VII of the permit application. The Division
has reviewed this portion of the application and determined that the
information is adequate. All previous concerns relating to the
baseline vegetation information section of the initial permanent
program permit application have been resolved.
In the initial sampling program undertaken, inadequate numbers of
samples were taken to provide the current desired levels of confidence
(p greater than or equal to .80 for non-herbaceous communities,
d = .10, alpha = 2) for the productivity of the greaswood shrubland,
shadscale shrubland, and juniper woodland vegetation types.
The Salt Creek Mining Company Munger Canyon Mine contains the same
vegetative communities (with the exception of the Big sagebrush
community) as, and is located contiguously to, the Salt Creek Mining
Company McClane Canyon Mine. Abiotic factors affecting the occurrence
of vegetation communities are similar. For this reason, data from the
two mine sites for productivity of the above communities were compared
to determine if the communities of McClane and Munger Canyon were from
differing populations. It was verified statistically that the McClane
and Munger respective communities were not significantly different in
terms of vegetative productivity within the bounds of each vegetative
community. Data from the McClane and Munger sites were combined
(within communities between sites), and it was determined that the
combined data met confidence level requirements.
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