2011-05-18_PERMIT FILE - C1981012A ‎(2)‎

• Permit No: C1981012A
• IBM Index Class Name: Permit File
• Doc Date: 5/18/2011
• Doc Name: SUBSIDENCE CONTROL, MONITORING, AND MITIGATION PLAN
• Section_Exhibit Name: Exhibit 24 Subsidence Control, Monitoring, and Mitigation Plan
• Media Type: D
• Archive: Yes

May 11, 2011
Page i
NEW ELK COAL COMPANY
SUBSIDENCE CONTROL, MONITORING, AND MITIGATION PLAN
TABLE OF CONTENTS
Agapito Associates, Inc.
Page
1.0 INTRODUCTION ............................................................................. ..............................1
2.0 BACKGROUND INFORMATION .................................................... ..............................1
3.0 SUBSIDENCE PREDICTION ANALYSIS AND RESULTS ............. ..............................3
4.0 SUBSIDENCE PLANS BY SURFACE STRUCTURE CLASS .......... ..............................4
4.1 Gas Wells .............................................................................. ..............................4
4.1.1 Gas Well Subsidence Control Plan ............................. ..............................5
4.1.2 Gas Well Monitoring Plan .......................................... ..............................5
4.1.3 Worst Possible Consequences of Damage to Gas Wells ............................6
4.1.4 Gas Well Damage Mitigation Plan .............................. ..............................6
4.2 Gas Pipelines ......................................................................... ..............................6
4.2.1 Gas Pipeline Subsidence Control Plan ........................ ..............................6
4.2.2 Gas Pipeline Monitoring Plan ..................................... ..............................7
4.2.3 Worst Possible Consequences of Damage to Gas Pipelines .......................7
4.2.4 Gas Pipeline Damage Mitigation Plan ......................... ..............................7
4.3 Gas Pipeline Ancillary Structures ........................................... ..............................7
4.3.1 Gas Pipeline Ancillary Structures Subsidence Control Plan ......................7
4.3.2 Gas Pipeline Ancillary Structures Monitoring Plan ..... ..............................7
4.3.3 Worst Possible Consequences of Damage to Gas Pipeline
Ancillary Structures .................................................... ..............................8
4.3.4 Gas Pipeline Ancillary Structures Damage Mitigation Plan .......................8
4.4 Water Pipeline ....................................................................... ..............................8
4.4.1 Water Pipeline Subsidence Control Plan ..................... ..............................8
4.4.2 Water Pipeline Monitoring Plan .................................. ..............................8
4.4.3 Worst Possible Consequences of Damage to Water Pipeline .....................8
4.4.4 Water Pipeline Damage Mitigation Plan .................... ...............................
8
4.5 Water Pipeline Ancillary Structures ....................................... ..............................8
4.5.1 Water Pipeline Ancillary Structures Subsidence Control Plan
...................8
4.5.2 Water Pipeline Ancillary Structures Monitoring Plan .. ..............................9
4.5.3 Worst Possible Consequences of Damage to Water Pipeline
Ancillary Structures .................................................... ..............................9
4.5.4 Water Pipeline Ancillary Structures Damage Mitigation Plan
...................9
4.6 Surface Water Disposal Pit ..................................................... ..............................9
DISCLAIMER: This report contains professional opinions based on information provided by
the Owner. AAI makes no warranties, either expressed or implied, as to the
accuracy or
completeness of the information herein. Opinions are based on subjective interpretations of
geotechnical data; other equally valid interpretations may exist. Identification and control of
hazardous conditions are the responsibilities of the Owner.
Agapito Associates, Inc.