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West Elk Mine 2011 Annual Hydrology Report <br />MOUNTAIN COAL COMPANY, LLC <br />WEST ELK MINE <br />WATER YEAR 2011 (WY 2011) ANNUAL HYDROLOGY REPORT <br />TABLE OF CONTENTS <br />1.0 INTRODUCTION 1 <br />1.1 Overview of Mining Operations 1 <br />2.0 HYDROLOGIC SUMMARY OF WATER YEAR 2011 1 <br />2.1 Climatological Data 2 <br />2.2 Stream Flow Data 5 <br />2.2.1 Flows in the North Fork of the Gunnison River 5 <br />2.2.2 Flows in Minnesota Creek near Paonia, CO 7 <br />3.0 HYDROLOGIC MONITORING PLAN 8 <br />3.1 Surface Water Monitoring Program 12 <br />3.1.1 Upper North Fork Drainage Basin Surface Water Monitoring <br />Stations 14 <br />3.1.1.1 Deep Creek (Upper, Lower) 14 <br />3.1.1.2 Raven Gulch (Upper, Lower) 14 <br />3.1.1.3 Box Canyon 14 <br />3.1.1.4 North Fork Upper 15 <br />3.1.1.5 Sylvester Gulch (Upper, Middle, Lower) 15 <br />3.1.2 Lower North Fork Drainage Basin Surface Water Monitoring <br />Stations 16 <br />3.1.2.1 North Fork Lower 16 <br />3.1.2.2 Lower Gribble Gulch 16 <br />3.1.3 Minnesota Creek Drainage Basin Surface Water Monitoring <br />Stations 16 <br />3.1.3.1 Lick Creek Flume 16 <br />3.1.3.2 Dry Fork Flumes (Upper, Middle, and Lower) 16 <br />3.1.3.3 Poison Gulch 17 <br />June 2012 HydroGeo, Inc. <br />