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2010-03-08_REPORT - C1996083 (6)
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2010-03-08_REPORT - C1996083 (6)
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Last modified
8/24/2016 4:00:56 PM
Creation date
3/8/2010 10:34:07 AM
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Template:
DRMS Permit Index
Permit No
C1996083
IBM Index Class Name
REPORT
Doc Date
3/8/2010
Doc Name
2009 Bi-Annual Subsidence Report
From
J.E. Stover & Associates, Inc
To
DRMS
Permit Index Doc Type
Subsidence Report
Email Name
JJD
Media Type
D
Archive
No
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• <br />0 <br />• <br /> Station General Location Result <br /> 7A-7D Hubbard Creek No significant change <br /> 17A -17F Hubbard Creek No significant change <br />I 1J <br />1A D4 Headgate and Mining complete. Maximum subsidence 2.4' over D4 <br />' <br />? - North Mains & B7 . <br />head ate 1A B7 brought max subsidence to 7.0 <br /> 23A - 23C Mouth of Dove Gulch No significant change <br /> 24A - 24G West Submains Mining complete. Maximum subsidence 7.8'(24G) <br /> WD1 & 131 <br /> Mining complete. D-Seam max subsidence 5.7'(25C) <br /> 25A - 25F WD2 Panel & B2 Panel B-Seam max subsidence 14.2 25C <br /> Mining complete. Maximum subsidence 4.7'(26E) <br />4 26A - 26G WD1 Panel & B1 Panel B-Seam max subsidence 11.8'(26E) <br /> Mining complete. Maximum subsidence 4.0'(27B) <br />4 27A - 27D WD2 Panel & B2 Panel B-Seam max subsidence 10.5'(27B) <br /> Mining complete. Maximum subsidence 6.2'(29B) <br /> 28A - 28D WD1 Panel & 131 B-Seam max subsidence 13.4'(28B) <br /> 29A - 29D WD2 Panel Outcrop 29A has subsided 1.6' <br /> 30A - 30D WD Panels Outcrop No significant change <br /> 31A- 31C D1 Tailgate An consistent subsidence of about 0.7' <br /> 32F Subsided 8.4'. Subsidence monument installed after <br /> 32A-32M B-2 Panel D-Seam was mined. <br /> 33A Subsided 6.2'. Subsidence monument installed after <br /> 33A-331 B-3 Panel D-Seam was mined. 33A destroyed by drill pad <br /> reclamation <br /> 34-A Subsided 5.4 Subsidence monument installed after <br /> 34A-34K B-3 Panel D-Seam was mined. 34-B Subsided 6.1'. <br /> 35-C Subsided 7.6'. Subsidence monument installed after <br /> 35A-35D B-3 Panel D-Seam was mined. <br /> B-4 Panel No subsidence monuments over B-4. <br /> 8A - 8D located on the northern edge of B-5 and above 13- <br /> 8A-8D B-5 Panel 6 show a consistent subsidence of about 10.0' <br /> 9A located in the southern edge of B-6 panel subsided 8.2 <br /> feet. 6' is attributable to the D Seam. The initial mining <br /> 9A B-6 Panel in B-6 likely triggered the 7/1/07 Freeman Gulch <br /> landslide. <br />4 1 5C B-7 Panel 5C located in the center of the B-7 panel subsided 10.0' <br />4 Surveyed during reporting period. <br />The table shows the B-1 and B-2 panels over the WD panels have added an additional <br />8.5', 7.1', 6.5' and 7.2' feet of subsidence at monuments 25C, 26E, 27B and 28B <br />respectively. <br />-3-
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