REP46585

• Permit No: C1981038
• IBM Index Class Name: Report
• Doc Date: 4/13/2006
• Doc Name: 2005 Annual Subsidence Report
• From: J.E. Stover & Associates Inc
• To: DMG
• Permit Index Doc Type: Subsidence Report
• Media Type: D
• Archive: No

August 31, 2005
Bowie No. 1 Mine Subsidence
Survey date August 30, 2005
When using this GPS survey there is a change in the values for Stations B, C and E
The following table shows the coordinate value for each subsidence station from the original
Westmoreland Survey Data to the Cragg Surveying GPS values of November 2001 to August 2004.
Coordinates for these monuments are as follows;
Northing Easting Elevation
Station B Westmoreland 16921.18 8754.49 8146.79
Cragg GPS Nov 2001 16919.97 8756.43 8145.33
Cragg GPS Aug 2002 16919.91 8756.49 8145.31
Cragg GPS Dec 2002 16919.98 8756.51 8145.29
June 2003 16919.90 8756.51 8145.26
August 2004 16919. 8756.47 8145.28
Average GPS Value 16,919.94 8,756.48 8,145.29
Station C Westmoreland 17750.57 8741.52 8148.05
Cragg GPS Nov 2001 17749.05 8743.46 8147.36
Cragg GPS Aug 2002 17749.05 8743.51 8147.25
Cragg GPS Dec 2002 17749.09 8743.57 8147.29
June 2003 17748.97 8743.56 8147.34
August 2004 1~ 8743.53 8147.37
• Average GPS Value 17,749.03 8,743.53 8,147.32
Station E Westmoreland 18257.47 17859.89 8572.82
Cragg GPS Nov 2001 18256.67 17859.44 8573.23
Cregg GPS Aug 2002 18256.72 17859.47 8573.33
Cragg GPS Dec 2002 18256.67 17859.47 8573.21
June 2003 18256.68 17859.50 8573.23
August 2004 18256.68 17859.51 8573.24
Average GPS Value 18,256.68 17,859.48 8,573.25
A listing of the subsidence stations along the Pitkin Mesa Pipeline, with coordinate values are
shown here in the following tables. Note, survey data begins with the first survey by ute Engineering
in June of 1995. The tables list the coordinates of each station based on the fixed Westmoreland
values for Stations B,C and E, through August, 2002, followed by the values of the stations based
on the GPS surveys from November 2001 through August 2005.
~ s1_z