PERMFILE45006

• Permit No: C1981044A
• IBM Index Class Name: Permit File
• Doc Date: 5/26/2006
• Section_Exhibit Name: 4.0 Permanent Performance Standards
• Media Type: D
• Archive: Yes

4.20.3 SURFACE OWNER PROTECTION
EC will comply with all provisions of the subsidence control plan. If, in the event subsidence causes material damage or
reduces the value of reasonable foreseeable use of surface lands, EC will restore, rehabilitate, or remove and replace each
damaged structure, feature, or value, promptly after damage is suffered, to the condition it would be as if the subsidence had
occurred and reasonably foreseeable uses it was capable of supporting before subsidence.
4.20.4 BUFFER ZONES
Underground mining will not be conducted so as to cause material damage to any perennial stream. Underground mining
will not be conducted beneath or adjacent to any impoundment having a storage volume of 20 acre-feet or more.
Underground mining will not be conducted beneath any aquifer that serves as a significant source of water supply to any
public water system.
Underground mining will not be conducted beneath or in close proximity to any public buildings or urbanized areas.
4.21 COAL EXPLORATION
As explained in Section 2.02, General Requirements for Coal Exploration, no coal exploration activities are currently
planned for areas outside the permit boundaries. Therefore, the requirements of this section are not applicable.
All baseline data collected and related activities were conducted under an approved exploration permit. Any future coal
exploration activities, which occur will be conducted in accordance with applicable roles and regulations and any necessary
permits will be obtained prior [o beginning exploration activities.
4.22 CONCURRENT SURFACE AND UNDERGROUND MINING
As previously noted, EC has no plans to conduct surface mining operations. Current plans call for the EC coal reserve to be
recovered exclusively by underground mining methods. Therefore, concurrent surface and underground mining operations
will not occur on the EC property, and the requirements of this section are not applicable.
4.23 AUGER MINING
EC has no current plans to supplement coal recovery through the use of auger mining methods. Evaluation of the geologic
characteristics of the EC coal reserve presently precludes the effective use of auger mining methods. Therefore, the
requirements of this section are not applicable.
4.24 OPERATIONS IN ALLUVIAL VALLEY FLOORS
As previously discussed in Section 2.06.8, Surface Coal Mining and Reclamation on Areas or Adjacent to Areas Including
Alluvial Valley Floors, there are two (2) alluvial valley floor deposits within the EC permit boundaries. These are:
• Yampa River Alluvial Valley Floor (Big Bottom)
• Williams Fork River Alluvial Valley Floor
Yampa River Alluvial Vallev Floor Bie Bottoml
Permit Revision 04-34 4.01-13 Revised 7/2/04