2021-08-09_PERMIT FILE - C1981019A ‎(5)‎

• Permit No: C1981019A
• IBM Index Class Name: Permit File
• Doc Date: 8/9/2021
• Doc Name: Volume 1 Rule 4
• Section_Exhibit Name: 4.01 Through 4.30
• Media Type: D
• Archive: Yes

RULE 4 PERFORMANCE STANDARDS

Rule 4 Performance Standards 4-53 Revision Date: 7/20/21
Revision No.: MR-235
Upon completion of the hole, cuttings from the drill hole will be placed in the drill hole and the
site reclaimed. Some holes maybe left open and completed with piezometers, if they are needed
for ground water monitoring. The requirements of Section 4.07 will be met for each exploration
hole. See Section 2.04.4, Sealing of Exploration and Mine Holes, for further information
concerning reclamation of exploration holes.

With the exception of possible piezometers to be installed in some of the drill holes for
groundwater quality and quantity monitoring, all equipment related to the exploration program
will be removed from the exploration area when it is no longer needed for exploration.

During the exploration program, minimization of surface disturbance and prompt reclamation
practices will be utilized to eliminate sedimentation problems and any disturbance of the present
hydrologic balance. Water bars and ditches will be built wherever needed. In addition, water from
drilling operations will be contained on the drill site and allowed to evaporate thus eliminating any
off-site disturbance.

As discussed under Section 2.04.6, no acid-forming materials have been found to exist within the
mine plan or adjacent area.

A compilation of 1989-1997 Permit Area Coal Resource Confirmation/Exploration/Monitor wells
and Transfer of Permit Area Exploration Liability to NOI-X-95-109-05 status can be found in
Exhibit 6, Geological Information an Item #5.

Exploration taking place inside and outside of the permit area will be handled through the Notice
of Intent (NOI) procedures. Se the appropriate NOI for details for each program.

With the approval of Technical revision 50, all exploration holes located within the permit
boundary are transferred to NOI X-95-109-5 and are managed under Coal Exploration procedures.

Wells drilled as an integral part of water monitoring plans identified in the PAP (Permit C-81-019)
and water supply wells (for mining purposes) are managed under this Permit C-81-019.

4.21.5 Requirements for a Permit

No coal will be removed or extracted by the proposed coal exploration other than occasional spot
coring. No coal will be removed or extracted for commercial sale during coal exploration.

4.22 CONCURRENT SURFACE AND UNDERGROUND MINING

Colowyo does not currently plan to have concurrent surface or underground mining activities;
therefore, the requirements of this Section are not applicable to this permit application.