2022-09-29_PERMIT FILE - C1980007 ‎(5)‎

• Permit No: C1980007
• IBM Index Class Name: Permit File
• Doc Date: 9/29/2022
• 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: No

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10.1.1 Effects of Subsidence and Mine-induced Seismic Activity on Landslides ............................................... 30
10.2 ROCKFALLS ...................................................................................................................................................... 31
10.3 IMPORTANCE OF BASELINE LANDSLIDE AND ROCKFALL DATA ........................................................................ 33
11.0 EFFECTS OF SUBSIDENCE AND MINE-INDUCED SEISMIC ACTIVITY ON MAN-MADE
STRUCTURES AND RENEWABLE RESOURCES ............................................................................................. 34
11.1 MINNESOTA RESERVOIR ..................................................................................................................................... 34
11.2 STOCK WATERING PONDS AND U.S. FOREST SERVICE WATER RESOURCES ..................................................... 34
11.3 STREAMS AND DITCHES.................................................................................................................................... 35
11.3.1 Potential for Hydraulic Connection between Mine Workings and Surface ............................................. 36
11.4 SPRINGS AND WATER-BEARING ZONES ............................................................................................................ 37
11.5 ROADS .............................................................................................................................................................. 38
11.6 BUILDINGS ....................................................................................................................................................... 38
11.6.1 Lower Dry Fork Cow Camp ......................................................................................................................... 38
11.6.2 Minnesota Creek Ditch Rider’s Cabin .......................................................................................................... 38
12.0 POSSIBLE SUBSIDENCE CONSEQUENCES ......................................................................................... 39
13.0 POTENTIAL IMPACTS FROM LOCAL SEISMIC ACTIVITY............................................................ 40
14.0 SUBSIDENCE CONTROL PLAN ............................................................................................................... 41
15.1 ANTICIPATED EFFECTS ..................................................................................................................................... 41
15.2 REDUCTION MEASURES (UNDERGROUND) ....................................................................................................... 41
15.0 SUMMARY AND CONCLUSIONS ............................................................................................................ 42
16.0 REFERENCES .............................................................................................................................................. 44