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REP47152
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REP47152
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Last modified
8/25/2016 12:50:39 AM
Creation date
11/27/2007 11:41:20 AM
Metadata
Fields
Template:
DRMS Permit Index
Permit No
C1982056
IBM Index Class Name
Report
Doc Date
3/20/1995
Doc Name
2ND HALF 1994 SUBSIDENCE SURVEY REPORT PART 1
Permit Index Doc Type
SUBSIDENCE REPORT
Media Type
D
Archive
No
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III IIIIIIIIIIIIIIII Doc Date:12/11/2001 ,n. <br />.~: <br />s <br />gFCF1~F0 <br />• SECOND HALF 1994 SUBSIDENCE SURVEY REPORT ~4/Q <br />of v~~~~0~'i,%nea2o 1995 <br />I. Survey Data s~ Leo/p9y <br />During the second half of 1994, subsidence survey data was collected on a quarterly <br />basis from established monuments on Routt County Road 27 in those areas underlain by <br />gate roads or panel centers (refer to Figure I for monument locations). Table 1 provides a <br />summary of the collected data for stations R1- R6 located over the gate roads at the west <br />end of the 1 Southwest Longwell panel, for station R7 situated over the center of the 1 <br />Southwest Longwell panel, and for stations R8-RI S located over the gate roads on the <br />south side of the 1 Southwest Longwell panel. <br />In addition, the pre-mining survey information for the 5000 line consisting of six points <br />established to verify that subsidence resulting from the mining of the 2 Southwest <br />Longwell panel does not extend into the Fish Creek AVF was collected during the period. <br />This information is also provided in Table 1. The 5000 line survey monument locations <br />are depicted on Map 23A. <br />II. Maps <br />• Monument locations are depicted on Figure 1 and Map 23A. The extent of underground <br />workings during the period is presented as the Twentymile Coal Company - Foide] Creek <br />Mine monthly update map for the period ending 12/31/94. The 1 Southwest Longwell <br />panel was initiated in July and completed in December. The 2 Southwest Longwell panel <br />was initiated in December as shown on the monthly update map. <br />Approximately 6500 feet of the 2 Southwest Longwell panel is projected to be <br />completed during the first half of 1995 as indicated on the monthly update map. County <br />Road 27 and the YVEA power line undermined during the reporting period are shown on <br />Figure l . Surface topography is presented on Map 23A. No cross section information <br />was generated during the period. <br />III. Structures <br />Structures affected during the period include Routt County Road 27 and the YVEA <br />power line. Daily visual inspections of County Road 27 were initiated 7/14/94 and <br />continued through November 11/21/94. Selected inspection sheets are included in this <br />report. With the exception of [he initial form completed, only those sheets showing other <br />than no impact observations are included. All daily inspection fornis are available for <br />review at the mine office. No significant road damage requiring immediate repair was <br />evidenced during the subsidence process though minor deterioration was noted. The <br />• YVEA power line was visually inspected on a periodic basis with no impacts evident <br />during the period. <br />
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