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Draft West Elk Mine 2005 Annual Hydrology Report <br />• MOUNTAIN COAL COMPANY, LLC <br />WEST ELK MINE <br />WATER YEAR 2005 (WY 2005) 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 2005 WATER YEAR ........................................................................ 1 <br />2.1 Climatological Data .............................................................................................................. 1 <br />2.2 Stream Flow Data .................................................................................................................. 4 <br />3.0 HYDROLOGIC MONITORING ............................................................................................................. 6 <br /> 3.1 Swface Water Monitoring ............................................................................................ ......... 7 <br /> 3.1.1 Upper North Fork Drainage Basin Surface Water Monitoring Stations ......... ......... 9 <br /> 3.1.1.1 Deep Creek ......................................................................................... ......... 9 <br />• 3.1.1.2 Raven Gulch ....................................................................................... ......... 9 <br /> 3.1.1.3 Box Canyon ........................................................................................ ......... 9 <br /> 3.1.1.4 North Fork Upper ............................................................................... ......... 9 <br /> 3.1.1.5 Sylvester Gulch .................................................................................. ......... 9 <br /> 3.1.2 Lower North Fork Drainage Basin Surface Water Monitoring Stations ........ ....... 10 <br /> 3.1.2.1 North Fork Lower .............................................................................. ....... 10 <br /> 3.1.2.2 Lower Gribble Gulch ......................................................................... ....... 10 <br /> 3.1.3 Minnesota Creek Drainage Basin Surface Water Monitoring Stations ........... ....... 10 <br /> 3.1.3.1 Lick Creek Flume ............................................................................... ....... 10 <br /> 3.1.3.2 South Prong Creek ............................................................................. ....... 10 <br /> 3.1.3.3 Dry Fork ............................................................................................. ....... 10 <br /> 3.1.3.4 Poison Gulch ...................................................................................... ....... 11 <br /> 3.1.3.5 Deer Creek ......................................................................................... ....... 11 <br /> 3.1.3.6 Horse Gulch and East Gulch, East of Horse Gulch ............................ ....... I 1 <br /> 3.1.3.7 Upper and Lower Minnesota Creek ................................................... ....... 11 <br /> 3.2 Spring and Seep Monitoring ........................................................................................ ....... 12 <br /> 3.2.1 Springs above the F Seam in the North Fork Drainage Basin ......................... ....... 14 <br /> 3.2.1.1 Spring 24-3 ......................................................................................... ....... 14 <br /> 3.2.1.2 Spring 13-4 ......................................................................................... ....... 14 <br /> 3.2.1.3 Spring 13-3 ......................................................................................... ....... 15 <br /> 3.2.1.4 Spring 13-2 ......................................................................................... ....... 15 <br /> 3.2.1.5 Spring 13-1 ......................................................................................... ....... 15 <br /> 3.2.1.6 Spring 26-1 ......................................................................................... ....... 15 <br />• 3.2.1.7 Seep E14-1 ......................................................................................... <br />3.2.1.8 Spring 27-1 ......................................................................................... ....... 15 <br />....... 15 <br /> 3.2.1.9 Spring G-7 .......................................................................................... ....... 16 <br />September 2006 HydroGea, InC. <br />