2011-08-01_REPORT - C1980007 ‎(5)‎

• Permit No: C1980007
• IBM Index Class Name: REPORT
• Doc Date: 8/1/2011
• Doc Name: 2010 Annual Hydrology Report
• From: HydroGeo, Inc
• To: DRMS
• Annual Report Year: 2010
• Permit Index Doc Type: Hydrology Report
• Email Name: TAK
• Media Type: D
• Archive: No

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West Elk Mine 2010 Annual Hydrology Report i
MOUNTAIN COAL COMPANY, LLC
WEST ELK MINE
WATER YEAR 2010 (WY 2010) ANNUAL HYDROLOGY REPORT
TABLE OF CONTENTS
1.0 INTRODUCTION 1
1.1 Overview of Mining Operations 1
2.0 HYDROLOGIC SUMMARY OF WATER YEAR 2010 1
2.1 Climatological Data 2
2.2 Stream Flow Data 5
2.2.1 Flows in the North Fork of the Gunnison River 5
2.2.2 Flows in Minnesota Creek near Paonia, CO 7
3.0 HYDROLOGIC MONITORING PLAN 8
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 15
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 16
3.1.3.1 Lick Creek Flume 16
3.1.3.2 Dry Fork Flumes (Upper, Middle, and Lower) 16
3.1.3.3 Poison Gulch 16
3.1.3.4 Deer Creek 17
July 2011 HydroGeo, Inc.