PERMFILE124692

• Permit No: C1982056
• IBM Index Class Name: Permit File
• Doc Date: 12/11/2001
• Section_Exhibit Name: EXHIBIT 08 TAB 4.11 Water Tank Rockfall Hazard Trench, 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\WTNKTREN User: CW BEGEJ
~~ Date: 06-01-1995 Time: 13:32:41
SAE DEMONSTRATION, WATER TANK ROCKFALL HAZARD TRENCH, 10-YR 24-HR
Storm: 1.80 inches, 10 year-24 hour, SCS Type II
Hydrograph Convolution Interval: 0.1 hr
NON-POND STRUCTURE INPUT/OUTPUT TABLE
J2, B1, S1
UPL, CUT, FILL: S-T
Drainage Area from J2, B1, S1, SWS(s)1-3: 3.9 acres
Total Contributing Drainage Area: 5.9 acres
POROUS ROCK CHECK DAM INPUTS:
Manning's
H`fg;t S(&pe Z n Por(~;ty
---tt---------))-----------------------------
---------------------------------------
3.5 16.50 1.5:1 0.032 41.00
Trap Efficiency: 31.64 ~
Runoff Peak Peak Sediment Peak Settleable
Volume Discharge Sediment Concentration Concentration 24VW 24AA
(ac-ft) (cfs) (tons) (mg/1) ml/1 (ml/1) (ml/1)
IN 0.07 0.53 0.3 9988 6.77 3.30 0.53
OUT 0.07 0.53 0.2 6836 4.14 2.02 0.33
.~ *~~***********~*****~*******~*****~******~**t~*~********************,t~~,t**~
J2, B1, 53
UP/CUT/FILL:T-OUTFAL
Drainage Area from J2, B1, 53, SWS(s)1-3:
Total Contributing Drainage Area:
POROUS ROCK CHECK DAM INPUTS:
H(fg't
tt S(~pe Z
---
-----
---
--- ----))--------
-
---
--
-
-
-
3.5 --
-
--
1.90 1.5:1
Manning's
n
0.7 acres
6.7 acres
Porosity
(~)
0.032 41.00
Trap Efficiency: 20.17 ~
Runoff Peak Peak Sediment Peak Settleable
Volume Discharge Sediment Concentration Concentration 24VW
(ac-f t) (cfs) (tons) (mg/1) ml/1 (ml/1)
2
-----------------------------------------
IN 0.08 0.61 0.2 7026
OUT 0.08 0.61 0.2 5612
4.32 2.20 0.33
3.14 1.60 0.24

J2, B1, S4
NULL SWS-GRASS FILTR
Drainage Area from J2, B1, 54, SWS(s)1: 0.0 acres
~ Total Contributing Drainage Area: 6.7 acres
.GRASS FILTER INPUTS:
Bulk Specific Gravity: 1.25
Initial Depth of Sediment in Zone D: 0.00 inches
Permit Renewal No. 3 FORMERLY EX 8-146 TAB 4.11, PG 7 11/1!99