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2014-01-31_REPORT - C1980007
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2014-01-31_REPORT - C1980007
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Last modified
8/24/2016 5:39:27 PM
Creation date
2/4/2014 12:34:58 PM
Metadata
Fields
Template:
DRMS Permit Index
Permit No
C1980007
IBM Index Class Name
Report
Doc Date
1/31/2014
Doc Name
Fall 2013 Subsidence Monitoring Report
From
Wright Water Engineers, Inc
To
DRMS
Permit Index Doc Type
Subsidence Report
Email Name
JRS
DIH
Media Type
D
Archive
No
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Fall 2013 Subsidence and Geologic Field Observations <br />South of Divide and Dry Fork Mining Areas (E -Seam) <br />- 4.0 OTHER SUBSIDENCE - RELATED DATA <br />In addition to the semi - annual traverses conducted by WWE above longwall mining areas, MCC <br />has been collecting data from numerous other monitoring locations. For example, regular <br />inspections of USFS roads and stock ponds are performed by MCC personnel. Copies of these <br />inspection forms can be found in Appendix A. MCC also collected substantial information from <br />the vicinity of Minnesota Reservoir and Monument Dam, such as visual inspections, survey data, <br />and annual aerial photo comparisons (Appendices B and Q. In addition, MCC monitors USFS <br />water resources in the vicinity of mining (Appendix D). Also included is a map (Appendix E) of <br />the actual extent (as of the date of the map) of the mined E -seam longwall panels within the <br />Maximum Projected Areal Extent of Potential Mineable E -seam as shown on approved Permit <br />Map 51. Within these appendices, note that the term "recent displacement" indicates that the <br />displacement shown is the difference in the measurements recorded in the last two surveys. <br />A general discussion of the Minnesota Reservoir and Monument Dam follows in Section 4.1 with <br />the actual data provided in Appendix B. An annual aerial photographic comparison of the <br />Minnesota Reservoir /Monument Dam area is conducted each fall to assess movement in the <br />landslides north and south of the reservoir. This discussion and these aerial images are found in <br />Section 4.2 and Appendix C. Section 4.3 discusses the 2013 Water Resources Project Survey <br />Report for the USFS as required in the permit and included as Appendix D. Previous reports have <br />included subsidence survey data for the Dry Fork channel. However, with the completion of the <br />survey for the spring 2013 report, MCC's permitted monitoring commitment has been met and this <br />report section has been removed (see previous reports for this earlier subsidence data). <br />Data and discussions associated with sections 4.1, 4.3 and 4.4 are the responsibility of MCC and <br />is provided in this WWE report for convenience. <br />4.1 Monument Dam /Minnesota Reservoir Monitoring Data <br />Beginning in 2006, numerous monitoring stations were established on Monument Dam and at <br />strategic locations around Minnesota Reservoir as a means to collect baseline information about <br />water levels and potential surface /subsurface movement. Monitoring locations included three <br />831 - 032.795 Wright Water Engineers, Inc. Page 25 <br />January 2014 <br />
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