2016-08-08_PERMIT FILE - C1981019A ‎(15)‎

• Permit No: C1981019A
• IBM Index Class Name: Permit File
• Doc Date: 8/8/2016
• Doc Name: Performance Standards
• Section_Exhibit Name: Volume 15 Rule 4
• Media Type: D
• Archive: Yes

RULE 4 PERFORMANCE STANDARDS
expansion area should be enhanced as compared to pre -mining condition based especially on increased
forage availability and diversity (for both livestock and wildlife species).
To date, reclamation efforts at the existing operation have proven successful. Herds of deer and elk are
regularly seen grazing on the reclaimed areas. Rodent and small game populations have reestablished on
the reclaimed areas providing a readily available food source for local raptor populations and other
predators. Columbian sharp -tailed grouse also use reclaimed grasslands.
4.19 PROTECTION OF UNDERGROUND MINING
Colowyo will conduct no coal mining closer than 500 feet to any point of either an active or abandoned
underground mine. Underground coal mines have been operated in the past as discussed in Section
2.04.4, but their locations were on the -northern side of Streeter Draw well over 500 feet from present
Colowyo mining.
The surface mining activities of Colowyo have been designed so as not to endanger any present or future
operations of either surface or underground mining operations. As discussed in Section 2.05.3, Colowyo
has engineered its mining plan to maximize recovery of coal by current economical surface mining
methods.
4.20 SUBSIDENCE CONTROL
Colowyo is conducting a surface coal mining operation. Therefore, the requirements of 4.20 are not
applicable to the Colowyo operation.
4.21 COAL EXPLORATION
All coal exploration activities within the Collom permit revision area will be completed in accordance
with the requirements and procedures outlined in the Volume 1.
4.22 CONCURRENT SURFACE AND UNDERGROUND MINING
Colowyo does not plan to have concurrent surface or underground mining activities; therefore, the
requirements of this Section are not applicable to this permit application.
4.23 AUGER AND HIGHWALL MINING
Colowyo does plan to conduct highwall mining activities; therefore, the requirements of this Section will
be revised through the technical revision process prior to initiating any highwall mining in the Collom
mining area.
4.24 OPERATIONS IN ALLUVIAL VALLEY FLOORS
The field investigation described in Section 2.04.7 and 2.06.8 resulted in no identification of alluvial
valley floors in the general mining area which would be adversely affected by mining operations;
therefore, no special performance standards for operations in the alluvial valley floors are applicable to
this mining permit application, and no protection or remedial measures are proposed for compliance to
this Section.
Collom — Rule 4, Page 34 Revision Date: 4/18/16
Revision No.: PR -04