2011-01-11_REPORT - C1980007

• Permit No: C1980007
• IBM Index Class Name: REPORT
• Doc Date: 1/11/2011
• Doc Name: Response to DRMS Review & Comments regarding Spring 2010 Subsidence Report ‎(Emailed)‎
• From: Mountain Coal Company
• To: DRMS
• Permit Index Doc Type: Subsidence Report
• Media Type: D
• Archive: No

TABLE 1
Appendix C
Minnesota Reservoir Robotic Total Station (RTS) Survey Data
October 2009 June 2010 October 2009 June 2010
Height Displacement Height Displacement Difference Longitudinal Displacement Longitudinal Displacement Difference
urvey an ar Standard Average an Tr verage Standard
Points Average (fts) Deviation Average (fts) Deviation (tits) (fts) Deviation (fts) Deviation (fts)
6001 ` r rr 0.01 0.01 0.00 0.01 0.01 0.02
8002` 7777-17-- 0.01 N NA NA °
= 0.01 Pb - NA NA
6003 0.01 0.01 0.00 7T7 i 0.01 0.01 0.02
E 6004 0.01 " 0.01 0.00 t r,k 0.01 ^Y dx i" 0.01 0.00
c 6005 e 7 0.01 0.01 0.01 t yr .'? 0.01 0.11
6006 1 0.01 ?Y,I v 0.01 0.02 0.02 0.01 0.00
E 6007` 0.01 NA NA 0.01 * r ,Y7 NA NA
c 8008` h* 0.01 414 n. `` NA NA dr 0.02 u t k r N ' NA NA
0 soon 01
0 tr. 0.01 0.00 T 0.01 ?r_ 0.01 0.02
6010 > .
0.01 0.01 0.00 0.01 0.01 0.00
6011 7 0.01 F? 0.01 0.00 v , ± _.737, 0.01 7T77-T, 0.01 0.03
6012` 0.01 77
? NA NA 0.01 aP <-?•?- , NA NA
7000 0.01 T
?"-J .. 0.01 0.02 0.01 0.01 0.00
7001 0.01 7{ 0.01 0.00 0.01 0.01 0.00
7002 a Gt" 0.01 u o3 0.01 0.00 0.01 0.01 0.02
7003 l 0.01
a 0.01 -0.05 y 0.02 + a - ?- 0.03 0.27
7004 4 T 0.01 77 i- ' 0.01 0.02 "."'7"V7,177 0.01 7717'47177 0.01 0.03
7005 * J 0.01 0.01 0.03 o _ 0.01 a 0.02 0.04
7006` 0.01 tti , - NA NA ?* - 0.01
7 NA NA
m 7007
e_ 0.01 0.01 0.03 _ 0.01 „
- ? r,+ 0.02 0.03
d 7008 u u 0.01 - 7, •?d' 0.01 0.00 -; ?•G r s. 0.02 77777a - 0.02 0.05
7009 771 0.01 0.01 0.04 0.02 7 .a - 0.02 0.03
m
c
7010
01
0
0.01
0.02
-
0.02
7.?.
0.02
0.00
y
G1 7011 ? - C-- .
0.01 n'- s 0.01 0.02 0.02 k ,t -,;-PSI 0.02 0.00
e 7012 0.01 0.01 0.04 0.02 d 0.02 0.03
7013 'j-! 0.01 0.01 0.03 0.02 0.02 0.03
0 7014 ` ,S 0.00 U U 0.01 0.02 ?? U 1 0.01 0.02 0.04
t 7015 +'dE; 0.01 x %. 0.01 0.03 0.02

02
0
7 0.02

02
0 0.04

0
00
0 7016 0 0.00 0 0.01 0.00 . . .
U) 7017 ,7 0.01 t F -y . 0.01 0.03 <.?. - 0.02
' 0.02 0.05
7018 0.01 ^'- ., 0.01 0.00 0.02 t ?
- 0.01 0.03
7019 0.01 0.01 0.00 t t . 0.01 r7 0.01 0.00
7020 -,,Q ' -_ 0.01 0.01 0.00 h +r 0.02 i? =^ , ' 0.01 0.00
7021 7-58 0.01 0.01 -0.07 77 0.02 .,7, 7 ? 0.03 0.29
7022 d i3 0.01 0.01 0.03
7 0.02 0.02 0.02
7023 0.00
r,
r ° 0.01 0.01 77;T77 0.02 - - 0.02 0.00
7024" tiA NA t NA NA r D7 NA ?;,R,r-,: NA NA
7025'" t!- NA TJ NA NA 7Y4--' NA NA NA
` Survey monuments were stolen and replaced in July 2010
" Robotic Total Station was unable to read these monuments after March 2009, likely due to interference from vegetation.