2014-10-10_PERMIT FILE - C1996083 ‎(8)‎

• Permit No: C1996083
• IBM Index Class Name: Permit File
• Doc Date: 10/10/2014
• Section_Exhibit Name: Volume IIIA Exhibit 15 Subsidence Prediction
• Media Type: D
• Archive: No

EXHIBIT 15
TABLE OF CONTENTS - CONTINUED
3.0 SUBSIDENCE ZONING ............................................................ .............................30
3.1 ZONES OF MINOR SUBSIDENCE IMPACT .............. .............................30
3.2 ZONES OF INTERMEDIATE SUBSIDENCE IMPACT ............................31
3.3 ZONES OF GREATEST SUBSIDENCE IMPACT ....... .............................31
4.0 CONCLUSIONS AND RECOMMENDATIONS ...................... .............................32
4.1 PREDICTED CHARACTER OF SUBSIDENCE .......... .............................33
4.2 PREDICTED IMPACTS ON RESOURCES AND SURFACE
STRUCTURES .......................................................... ............................... 33
4.3 POTENTIAL MITIGATING MEASURES ..................... .............................34
REFERENCES............................................................................... ............................... 35
SUBSIDENCE HANDBOOK ............................................................. .............................38
SURFACE WATER RESOURCES - PONDS ............. .............................38
GROUNDWATER ...................................................... .............................40
COLLUVIAL DEPOSITS - SPRINGS .......................... .............................41
MASS MOVEMENT FEATURES - LANDSLIDES ....... .............................44
ROADS AND TRAILS ................................................. .............................44
TABLES
Page
15 -1 Predicted and Actual Subsidence at the Bowie No. 2 Mine .. ..............................8
15 -2 Predicted Subsidence for Bear #3 Mine thru July, 1994 . ................................... 9
15 -3 Predicted Subsidence Bowie #1 Mine ................................... .............................10
15 -4 Probability of Chimney Collapse Through Overlying Rock (data from Gray
etal, 1977) ............................................................................. .............................18