PERMFILE131380

• Permit No: C1981041A
• IBM Index Class Name: Permit File
• Doc Date: 6/16/2003
• Doc Name: TOC to Appendix 20-3
• Section_Exhibit Name: Tab 20 Subsidence Survey Monitoring & Control Plan
• Media Type: D
• Archive: Yes

._ -35-
'_ •
(7) Distance (Y) into pillar to location of
Maximum vertical stable pillar stress()
. .~
Y
T ' do:
dYc an 6 (T~n 6-1)
O ~O
.+
_ _m ,(~ dv
Y n .gym ! /Tan 6 - t ~ Qp

•