2011-02-14_PERMIT FILE - C1980007A ‎(3)‎

• Permit No: C1980007A
• IBM Index Class Name: Permit File
• Doc Date: 2/14/2011
• Doc Name: SUBSIDENCE EVALUATION
• Section_Exhibit Name: Exhibit 60E Subsidence Evaluation for the South of Divide and Dry Fork Mining Areas
• Media Type: D
• Archive: Yes

• 9.1 POTENTIAL IMPACT OF WATER ON SUBSIDENCE IN WET MINING AREAS ....................... ............................... 23
10.0 POTENTIAL IMPACTS OF SUBSIDENCE AND MINE - INDUCED SEISMIC ACTIVITY ON
LANDSLIDESAND ROCKFALLS ................................................................................... ............................... 24
10.1 LANDSLIDES ................................................................................................................. .............................
10.1.1 Effects of Subsidence and Mine - induced Seismic Activity on Landslides ............. ............................... 26
10.2 ROCKFALLS .................................................................................................................. .............................
10.3 IMPORTANCE OF BASELINE LANDSLIDE AND ROCKFALL DATA ..................................... ............................... 28
11.0 EFFECTS OF SUBSIDENCE AND MINE - INDUCED SEISMIC ACTIVITY ON MAN -MADE
STRUCTURES AND RENEWABLE RESOURCES ........................................................... .............................
11.1 MINNESOTA RESERVOIR ................................................................................................ ............................... 30
11.2 STOCK WATERING PONDS AND U.S. FOREST SERVICE WATER RESOURCES ................... ............................... 31
11.3 STREAMS AND DITCHES .............................................................................................. ....I.......................... 31
11.3.1 Potential for Hydraulic Connection Between Mine Workings and Surface ........... ............................... 33
11.4 SPRINGS, WATER - BEARING ZONES, AND GROUND WATER WELLS ............................... ............................... 33
11.4.1 Springs ................................................................................................................. .............................
11.4.2 Water - Bearing Zones .......................................................................................... ............................... 35
11. 4.3 Ground Water Wells ........................................................................................... ............................... 35
. 11.5 ROADS ....................................................................................................................... ............................... 35
11.6 BUILDINGS ................................................................................................................. ............................... 36
11. 61 Lower Dry Fork Cow Cam 36
12.0 IMPACTS BENEATH THE MINED E COAL SEAM ........................................... ............................... 38
13.0 POSSIBLE SUBSIDENCE CONSEQUENCES ...................................................... ............................... 39
14.0 POTENTIAL IMPACTS FROM LOCAL SEISMIC ACTIVITY ......................... ............................... 40
15.0 SUBSIDENCE CONTROL PLAN .......................................................................... ............................... 41
15.1 ANTICIPATED EFFECTS ............................................................................................... ............................... 41
15.2 REDUCTION MEASURES (UNDERGROUND) ................................................................... ............................... 41
16.0 SUMMARY AND CONCLUSIONS ........................................................................ ............................... 42
17 REFERENCES ........................................................................................................ ............................... 47
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