PERMFILE41429

• Permit No: C1980007
• IBM Index Class Name: Permit File
• Doc Date: 10/7/2005
• Doc Name: Methane Drainage Wells Project Plan Drill Hole 19-06
• Section_Exhibit Name: Exhibit 80 Drilling Activities - TR102
• Media Type: D
• Archive: No

SEDCAD 4 for Windows
r,....,,:,.n~ ~ooa on..,ei~ i c~n,~o~.
Structure Detai/;
Structure #1 (Silt Fence)
pad runoff
Silt Fence Inputs:
Fence Flow yyidth along Land Slope Tie-back
Rate contour (ft) Height (ft) (%) distance (ft)
(gpm/sq ft)
0.3 300.0 3.0 3.00 100.0
*Sediment Storage: 0.00 ac-R
*No sediment capacity defined
Silt Fence Results:
Peak Fence Stage: 0.55 R
Peak Water Stage: 0.55 R
Dewater Tme: 0.50 days
Trap Efficiency: 77.29
Dewatering time is calculated from peak stage to lowest spil/way
Stage-Capacity-Discharge Table
Fence Stage

(R) Water Stage

(R) Area

(ac) i;apadty

(ac-R) Discharge

(~) Dewater
Tme
(hrs)
0.00 0.00 0.000 0.000 0.000 Top of Sediment
D.10 0.10 0.023 0.001 0.020 1.60
0.20 0.20 0.046 0.004 0.041 2.80
0.30 0.30 0.069 0.010 0.062 2.05
0.40 0.40 0.092 0.018 0.084 2.00
0.50 0.50 0.115 0.028 0.106 2.05
0.55 0.55 0.126 0.034 0.116 0.62 Peak Stage
0.60 0.60 0.138 0.041 0.128
0.70 0.70 0.161 0.056 0.151
0.80 0.60 0.184 0.073 0.175
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 - 0.5-acre.scA Printed 07-22-2005