2016-12-01_PERMIT FILE - C1980007 ‎(6)‎

• Permit No: C1980007
• IBM Index Class Name: Permit File
• Doc Date: 12/1/2016
• Doc Name: Hydrologic Characterization of the South of the Divide
• Section_Exhibit Name: Exhibit 71
• Media Type: D
• Archive: No

HYDROLOGIC CHARACTERIZATION AND MONITORING PLAN i
EXHIBIT 71
HYDROLOGIC CHARACTERIZATION OF THE
SOUTH OF DIVIDE / DRY FORK LEASE AREAS
AND HYDROLOGIC MONITORING PLAN FOR
MOUNTAIN COAL COMPANY, LLC
WEST ELK MINE
TABLE OF CONTENTS
1.0 SUMMARY.........................................................................................................................1
2.0 SOD AND DFL AREAS SURFACE WATER HYDROLOGY.........................................1
2.1 Streams.....................................................................................................................2
2.1.1 Dry Fork.......................................................................................................2
2.1.2 Deer Creek...................................................................................................2
2.1.3 Poison Gulch................................................................................................4
2.1.4 Lick Creek....................................................................................................4
2.1.5 Deep Creek...................................................................................................4
2.1.6 South Prong Creek.......................................................................................4
2.2 Stock Ponds, Springs, and Seeps.............................................................................5
3.0 SOD AND DFL AREAS GROUNDWATER HYDROLOGY..........................................8
3.1 Shallow Sediments.................................................................................................1 l
3.2 Bedrock..................................................................................................................11
3.2.1 F-Seam.......................................................................................................11
4.0 COMPREHENSIVE HYDROLOGIC MONITORING PLAN........................................12
4.1 Surface Water Monitoring Program.......................................................................15
4.1.1 Upper North Fork Drainage Basin Surface Water Monitoring Stations ... 17
4.1.1.1 Deep Creek (Upper, Lower)....................................................17
4.1.1.2 Box Canyon.............................................................................17
4.1.1.3 North Fork Upper.....................................................................17
4.1.1.4 Sylvester Gulch (Upper, Middle, Lower)................................17
4.1.2 Lower North Fork Drainage Basin Surface Water Monitoring Stations ...18
4.1.2.1 North Fork Lower....................................................................18
4.1.3 Minnesota Creek Drainage Basin Surface Water Monitoring Stations .....18
4.1.3.1 Lick Creek Flume....................................................................18
4.1.3.2 Dry Fork Flumes......................................................................18
4.1.3.2.1 Upper, Middle, and Lower Dry Fork Flumes ........18
4.1.3.2.2 Minnesota Reservoir Flume...................................18
Revised 09/07- PR12; 08/16- TR139 HydroGeo, Inc