PERMFILE70516

• Permit No: C1982056
• IBM Index Class Name: Permit File
• Doc Date: 12/11/2001
• Section_Exhibit Name: EXHIBIT 08 TAB 4.12 Water Tank Rockfall Hazard Outslope, 10yr 24hr SAE
• Media Type: D
• Archive: No

Civil Software Design -- SEDCAD+ Version 3.1
Copyright (C) 1987-1992. Pamela J. Schwab. All rights reserved.
Comppanyy Name: CYPRUS YAMPA VALLEY COAL
Filename: E:\SEDCAD3\TCCSS\WTNKOUT User: CW BEGEJ
Date: 06-01-1995 Time: 11:11:50
SAE DEMONSTRATION, ROCKFALL HAZARD TRENCH, H2O TANK, OUTSLOPE:lOY-24H
Storm: 1.80 inches, 10 year-24 hour, SCS Type II
Hydrograph Convolution Interval: 0.1 hr
NON-POND STRUCTURE INPUT/OUTPUT TABLE
----------------------------------------
J1, B1, S1
OUTSL/DIST
Drainage Area from J1, B1, S1, SWS(s)1-3: 0.4 acres
Total Contributing Drainage Area: 0.4 acres
GRASS FILTER INPUTS:
3vity: 1.25
Sediment in
Grass Inf
Spacing
_(in)
1.0 =____
Zone D:
filtration
Rate
(iph)
0.05
0.00 inches
Bulk Specific Gr.
Initial Depth of
Mannincj~s Grass
Seg n Height
_~__ _ _ ____(in)
1- 0.012 0 9.0
Stiffness ------ Filter ------
Factor
(N-s
m Lenggth
(ft) Width
(ft) Slo e
(~~
q
)
- _
20.000 20.0 1000.0 33.0
Total Filter Peak Critical Filter Sediment
Trap Infiltration
i
i Infiltration Flow Prone
i Travel Wedge
i
i Depth
ency
Eff
c Volume Rate Depth Veloc
ty Time n Zone
Locat
on
(~) (ac-ft) (cfs) (inch) (fps) (hrs) (feet) (inch)
99.8 0.0097 0.0231 0.009 1.0367 0.1000 0.048 0.002
) Runoff Peak Pea k Sediment Peak Settleable
•
Volume Discharge Sediment Con centration Con centration 24VW 24AA
(ac-ft) (cfs) (tons) (mg/1} ml/1 (ml/1} (ml/1)
IN 0.03 0.42 0.3 11405 7.72 5.01 0.69
OUT 0.02 0.39 0.0 46 0.00 0.00 0.00
**~**~*~*~***~*~**~***********~******~*t*t*****~*~***,t*****t~****t****r*****,t*

TAB 4.12, PG 5
11/1/99
Permit Renewal No. 3 FORMERLY EX 8-152