2016-02-25_PERMIT FILE - C1982056A ‎(6)‎

• Permit No: C1982056A
• IBM Index Class Name: Permit File
• Doc Date: 2/25/2016
• Section_Exhibit Name: Exhibit 7K Wolf Creek Reserve Subsidence Evaluation
• Media Type: D
• Archive: Yes

SubTerra, Inc. Peabody Twentymile Coal, LLC 03/16/2015
Foidel Creek Mine
Permit Revision 14-11 for Longwall Mining in the Wolf Creek Seam - Subsidence Evaluation
TABLE OF CONTENTS
Section Description Page
No. No.
1.
INTRODUCTION..................................................................................................................1
1.1.
Prior Work.........................................................................................................................1
1.2.
Foidel Creek Mine Layout in the Wolf Creek Seam...........................................................2
1.3.
Pre and Post Mining Land Uses........................................................................................2
1.4.
Potential Subsidence Impact Evaluation...........................................................................2
1.5.
Closure.............................................................................................................................2
2.
MINE SUBSIDENCE............................................................................................................3
2.1.
Subsidence Mechanics.....................................................................................................3
2.2.
Subsidence Prediction.......................................................................................................4
3.
EVALUATION OF POTENTIAL IMPACTS TO THE ENERGY SPUR..................................6
3.1.
Scope of Work...................................................................................................................6
3.2.
Approach...........................................................................................................................6
3.3.
Subsidence Prediction.......................................................................................................7
3.4.
Candidate Remedial Actions.............................................................................................7
3.4.1. Remedial Planning.....................................................................................................7
3.4.2. Possible Effects of Planned Remediation on Fish Creek and Its AVF.........................8
4.
EVALUATION OF POTENTIAL IMPACTS TO COUNTY ROAD 33 .....................................9
4.1.
Scope of Work...................................................................................................................9
4.2.
Approach...........................................................................................................................9
4.3.
Subsidence Prediction.......................................................................................................9
5.
EVALUATION OF IMPACTS TO FISH, FOIDEL, AND MIDDLE CREEKS AND THEIR
ALLUVIAL VALLEY FLOORS(AVFS).........................................................................................10
5.1.
Scope of Work.................................................................................................................10
5.2.
Subsidence Prediction.....................................................................................................10
5.3.
Predicted Impacts to the AVF..........................................................................................11
5.3.1. Increase in Fish Creek's Surface Area.....................................................................11
5.3.2. Increase in Foidel Creek's Surface Area..................................................................11
5.3.3. Increase in Middle Creek's Surface Area.................................................................12
5.3.4. Potential for Fissure Development and Water Loss (or Stream Pirating) ..................12
5.4.
ivionwring Requiremenis................................................................................................12
6.
EVALUATION OF POTENTIAL IMPACTS TO POWERLINES..........................................13
i PN: 2013-26