PERMFILE50123

• Permit No: C1994082A
• IBM Index Class Name: Permit File
• Doc Date: 9/27/2007
• Doc Name: Post Mining Channels SEDCAD Results/Channel YPM-1 to YPM-8
• Section_Exhibit Name: Tab 13 Attachment 13-12 Appendix 13.12.3
• Media Type: D
• Archive: Yes

RIPRAP
NHERE REQUIRED
TYPICAL LINED CHANNEL

Channel Flow
S
e m )Width
Botlg
W) Slope
SldeF Depth
f Fl
(
)
i
Freep
ard
Tota
e
th Lf/neDr
V
p (A g
lgt {
ft ftpw(i
p
o y
p
ty n~ ~ft~
p (
n
(
s)
xx11
7
1 (
)
(
1
) ~9
)
(
1 I
) (3)

1PM-8
38 5-
10 1.0 SO 1
.0 J4 0.3 1.3 V
6
11_3 1.0 JO 0.4 S9 0.3 O.7
YPM-9 29 5-17 V 3.0 1.0 39 1.0 20 e9•
'
18-2 1.0 3 0 0.3 4.9 1.0 1.3 6
YPM-10 (4) 30 5-70 V 3.0 1.1 32 0.3 1.4 Veq.
'
11-2 1.0 JO 0.3 SO 0.3 0.6 6
YPM-11 6.1 2-5 SO 3.0 1.O 25 0.3 1.3 Ve9~
'
6-fi 0.3 4.4 0.3 0.6 4.5
9-18 20 30 0.4 S3 1.0 1.4 6"
YPM-12 6.0 18-25 20 3.0 NA NA NA 1.8 Check Dams (4
YPM-13 4.1 9-30 20 30 03 S2 1.0 1.3 6'
27 9 1.0 3.0 0.3 40 03 0.6 4.5
1PM-14 27 17-34 1.0-20 30 0.3 SO 0.3 0.6 6.0'
YMP-75 20 20 30 30 0.2 40 0.3 0.5 4.5'
)PM-16 24 6-29 1.0 30 0.3 4.7 0.3 0.6 6"
YPM-17 2
p 8-15 ).0 30 0.3 4.0 0.3 O.6 4.5"
"
. 38 1.0 3.0 0.3 SO 0.3 0.6 6.0
YPM-18 20 11 1.0 ,IO 0.3 4.0 0.3 0.6 4.5"
6
0'
2.0 3f f.0 .IO 0.3 SO 03 (t6 .
YPM-19 20 17-34 30 30 0.2 4.0 0.3 O.5 4.5'
YPM-20 20 8 1.0 3.0 0.3 4.0 0.3 0.6 4.5"
'
20 30 1.0 30 03 SO 0.3 0.6 6.0
iPM-2fA 1.2 2-6 V 4.0 1.1 SO 0.3 1.4 V£G
NOTES:
1. Depth of flow based on minimum grade, Capacity Class B.
2. Velocity based on maximum grade, Stability Class D.
3. Riprap D50 based on PADER Method plus 3".
4. Design peak flow was rounded to 3.0 beacause PADER Method was unoble
to size riprap at 25 percent slope for SEDCAD calculated flow.
rN~a
m-ao
mss
IN-]9
RK3O6
© MWH
Le/b1 A .QUd A Rm'
1/bS A R®' A Rod
n. oArz ocvw n ortAw m
N/A
13-12.3-3
SENECA COAL COMPANY
YOAST MINE POSTMINING
CHANNEL DESIGNS