2021-02-05_PERMIT FILE - C1980007A ‎(5)‎

• Permit No: C1980007A
• IBM Index Class Name: Permit File
• Doc Date: 2/5/2021
• 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

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
ii