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2020-03-06_REPORT - C1980007
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2020-03-06_REPORT - C1980007
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Last modified
1/7/2025 4:13:13 AM
Creation date
3/6/2020 12:22:40 PM
Metadata
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Template:
DRMS Permit Index
Permit No
C1980007
IBM Index Class Name
Report
Doc Date
3/6/2020
Doc Name
Subsidence Monitoring Report
From
Wright Water Engineers, Inc
To
DRMS
Annual Report Year
2019
Permit Index Doc Type
Subsidence Report
Email Name
LDS
JDM
Media Type
D
Archive
No
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Fall 2019 Subsidence and Geologic Field Observations <br /> Southern Panels Mining Area <br /> 4.4 Traverse D-D' <br /> This traverse originates along the south side of the Dry Fork Road (Traverse A-A') and proceeds <br /> southward up Poison Gulch (drainage east of Deer Creek). This traverse crosses mined portions <br /> of E-seam Longwall Panels E3, E4, E5, E6, and E7 (see Map 1). The E-seam overburden depth <br /> along this traverse varies from slightly less than 700 feet to almost 900 feet. This traverse leads <br /> southward from Traverse A-A' crossing the Dry Fork and access to four MVB pads above mined <br /> E-seam Longwall Panel E7 (i.e., E7-8, E7-9, E7-10, and E7-1 1). <br /> The south end of Traverse D-D' crosses the mined portion of E-seam Longwall Panel ET The <br /> longwall mining face had passed beneath the south end of this traverse just prior to our fall 2018 <br /> field visit, creating subsidence features on or near the accessible MVB pads. At the time of our <br /> spring 2019 visit, the MVB E7-11 pad had no observable subsidence features and the previously <br /> observed differential settlement cracks that had been somewhat exacerbated by longwall mining <br /> beneath the MVB E7-9 pad were difficult to identify. Other subsidence features discussed in the <br /> Spring 2019 Subsidence Report (i.e., along the road near MVB E7-10 pad, on the MVB E7-10 <br /> pad, and on the MVB E7-9 pad) showed continued signs of healing and are therefore not included <br /> in this report. <br /> 4.5 Traverse E-E' <br /> This traverse begins at Traverse A-A' and continues southward to an intersection with Traverse F- <br /> F' and then west and south above mined E-seam Longwall Panels E5, E6, and E7 as well as the <br /> mined and unmined portion of E-seam Longwall Panel E8 (see Map 1). Overburden along this <br /> traverse varies from about 900 to 1,020 feet. <br /> Traverse E-E'previously allowed access to MVBs E5-9/10 through E5-13/14 above mined E-seam <br /> Longwall Panel E5 as well as access to MVBs E6-8/9 through E6-11 above mined E-seam <br /> Longwall Panel E6. Each of these pads has now been reclaimed with the exception of MVB E5- <br /> 11,which is immediately adjacent to the road. This traverse continues southward,providing access <br /> to MVBs E7-5 through E7-7 above mined E-seam Longwall Panel E7 and MVBs E84 through <br /> E8-7 above mined and unmined E-seam Longwall Panel E8. <br /> The fall 2019 visit to the MVB E7-5 through E7-7 pads found no new subsidence features. <br /> 831-032.910 Wright Water Engineers, Inc. Page 16 <br /> February 2020 <br />
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