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REP35645
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REP35645
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Entry Properties
Last modified
8/25/2016 12:12:58 AM
Creation date
11/27/2007 7:11:00 AM
Metadata
Fields
Template:
DRMS Permit Index
Permit No
C1981047
IBM Index Class Name
Report
Doc Name
APPENDIX 1-B TO BLUE RIBBON COAL COMPANY TR REQUEST MINE BENCH STABILIZATION
Permit Index Doc Type
STABILITY REPORT
Media Type
D
Archive
No
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1 <br />l~ <br />o• No colluvium or coal waste berm. <br />~' o.: 10 feet high, 20 feet wide rock berm. <br />i NORTH ND GO1TH END R TTONS <br />_ o Same design conditions as northern and southern sections <br />except: <br />' o Construction of a 40-foot buffer zone with recompacted <br />existing bench material. No coal waste will be utilized <br />I within this zone. <br />I - Figures 7 and 8 provide details of each section. Plan location <br />' and details of final design conditions are provided in Figure 5. <br />Final contours represented by the design showing conditions and <br />I subsurface drain details are shown on Figure 9. <br /> <br />~ - 5.3 DEWATERING <br />I Dewatering of specific critical areas during construction is <br />essential to allow for successful completion of the project <br />• construction. Two specific areas which have exhibited high <br />, groundwater conditions are shown in the cross-sections provided <br />in Figures 3 and 4. These specific areas will require dewatering <br />' during construction, utilizing various dewatering methods. <br />Dewatering within the excavated toe areas utilizing sump type <br />• methods will be the primary dewatering method used. Additional <br />, dewatering methods such as wells or slope drains will be utilized <br />if excavation and fill operations cannot be successfully <br />completed using only sump dewatering methods. In addition to the <br />dewatering requirements, it is recommended that the level of <br />' 22 <br />
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