2015-07-01_REPORT - C1980007

• Permit No: C1980007
• IBM Index Class Name: Report
• Doc Date: 7/1/2015
• From: Hydro Geo, Inc
• To: DRMS
• Annual Report Year: 2014
• Permit Index Doc Type: Hydrology Report
• Email Name: JRS
• Email Name: MPB
• Media Type: D
• Archive: No

West Elk Mine 2014 Annual Hydrology Report i
MOUNTAIN COAL COMPANY, LLC
WEST ELK MINE
WATER YEAR 2014 (WY 2014) ANNUAL HYDROLOGY REPORT
TABLE OF CONTENTS
1.0 INTRODUCTION...................................................................................................1
1.1 Overview of Mining Operations..................................................................1
2.0 HYDROLOGIC SUMMARY OF WATER YEAR 2014 .......................................2
2.1 Climatological Data.....................................................................................2
2.2 Stream Flow Data........................................................................................6
2.2.1 Flows in the North Fork of the Gunnison River ..............................6
2.2.2 Flows in Minnesota Creek near Paonia, CO....................................7
3.0 HYDROLOGIC MONITORING PLAN.................................................................9
3.1 Surface Water Monitoring Program...........................................................12
3.1.1 Upper North Fork Drainage Basin Surface Water Monitoring
Stations...........................................................................................14
3.1.1.1 Deep Creek (Upper, Lower)........................................14
3.1.1.2 Raven Gulch (Upper, Lower)......................................14
3.1.1.3 Box Canyon.................................................................14
3.1.1.4 North Fork Upper.........................................................14
3.1.1.5 Sylvester Gulch (Upper, Middle, Lower) ....................15
3.1.2 Lower North Fork Drainage Basin Surface Water Monitoring
Stations...........................................................................................15
3.1.2.1 North Fork Lower........................................................15
3.1.2.2 Lower Gribble Gulch...................................................15
3.1.3 Minnesota Creek Drainage Basin Surface Water Monitoring
Stations...........................................................................................15
3.1.3.1 Lick Creek Flume........................................................15
3.1.3.2 Dry Fork Flumes..........................................................15
3.1.3.2.1 Upper, Middle, and Lower Dry Fork Flumes 15
3.1.3.2.2 Minnesota Reservoir Flume ..........................16
3.1.3.3 Deep Creek Ditch Flume.............................................16
3.1.3.4 Poison Gulch................................................................16
3.1.3.5 Deer Creek...................................................................17
3.1.3.6 Horse Gulch and East Gulch, East of Horse Gulch .....17
3.1.3.7 Minnesota Creek (Upper, Lower)................................17
3.1.3.8 South Prong Creek.......................................................17
June 2015 HydroGeo, Inc.