PERMFILE72442

• Permit No: C1980007
• IBM Index Class Name: Permit File
• Doc Date: 1/3/2006
• Doc Name: SEDCAD Runs
• Section_Exhibit Name: Exhibit 80 Drilling Activities - TR103
• Media Type: D
• Archive: No

SEDCAD 4 for Windows
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Structure Detai/;
Structure #1 L7t Fence
pad runoff
Silt Fence Inputs:
Fence Flow yyldth along land Slope rie-back
(gpm/sq R) contour (R) Height (R) (%) distance (ft)
0.3 300.0 3.0 3.00 100.0
*Sediment Sto2ge: 0.00 ac-ft
*No sediment capacity defined
Silt Fence Results:
Peak Fence Stage: 0.81 ft
Peak Water Stage: 0.81 R
Dewater Time: 0.61 days
Trap EfFldency: 75.73
Dewatering Ume is calculated from peak stage to lowest spillway
Sta~c e-Capacity-Discharge Table
Fence Stage

(ft) Water Stage

(ft) Area

(ac) Capadty

(ac-ft) Discharge

(c~) Dewater
Time
(hrs)
0.00 0.00 0.000 0.000 0.000 Top of Sediment
0.10 0.10 0.023 0.001 0.020 0.70
0.20 0.20 0.046 0.004 0.041 1.40
0.30 0.30 0.069 0.010 0.062 1.45
0.40 0.40 0.092 0.018 0.084 2.15
0.50 0.50 0.115 0.028 0.106 1.90
0.60 0.60 0.138 0.041 0.126 1.90
0.70 0.70 0.161 0.056 0.151 2.00
0.80 0.80 0.184 0.073 0.175 2.50
0.81 0.61 0.186 0.075 0.177 0.11 Peak Stage
0.90 0.90 0.207 0.092 0.199
1.00 1.00 0.230 0.114 0.223
1.10 1.10 0.253 0.138 0.248
1.20 1.20 0.275 0.165 0.273
1.30 1.30 0.298 0.193 0.298
1.40 1.40 0.321 0.224 0.324
1.50 1.50 0.344 0.258 0.351
1.60 1.60 0.367 0.293 0.378
Filename: Mtncoal Pad - 1-acre.sc4 Printed 07-22-2005