2001-12-11_PERMIT FILE - C1996084 ‎(8)‎

• Permit No: C1996084
• IBM Index Class Name: Permit File
• Doc Date: 12/11/2001
• Section_Exhibit Name: EXHIBIT 15-19 MINE AREA P4 SEDIMENT CONTROL POND 4-1
• Media Type: D
• Archive: No

SEDCAD 4 for Windows
Copyright 1998 Pamela J. Schwab
Civil Software Design
w/o Freeboard w/ Freeboard
• Hydraulic Radius: 0.782
Froude Number: 0.85
Structure #3 (Pond
Pond
Pond Inputs:
Initial Pool Elev: 6,700.50
Initial Pool: 1.93 ac-k
'Sediment Storage: 2.04 ac-k
Dead Space: 20.00
*Sediment capacity based on Average Annual R of 70.0 for 3 year(s)
Perforated Riser
Riser Riser Height Barrel Barrel Barrel Slope Number of
'
Diameter (k) Diameter Length (k) (%) Manning
s n Spillway Elev Holes per
(in) (in) Elev
8.00 8.00 6.00 100.00 5.00 0.0240 6: .0 3
• Pond Results:

Peak Elevation: 6,702.83
H'graph Detention Tme: 14.06 hrs
Pond Model: CSTRS
Dewater Tme: 2.40 days
Trap Efficiency: 92.77
Dewatering time is calculated from peak stage to lowest spillway
Elevation-Capacity-Discharge Table

Elevation Area

(ac) Capacity

(ac-k) Discharge

(~s) Dewater
Tme
(hrs)
6,698 .06 0.733 0.000 0.000 Top of Sed. Storage
6,698 .50 0.754 0.328 0.000
6,699 .00 0.777 0.711 0.000
6,699 .50 0.801 1.105 0.000
6,700 .00 0.825 1.512 0.000
6,700 .50 0.849 1.930 0.000 Low hole SPW #1
6,701 .00 0.874 2.361 0.223 23.40*
6,701. 50 0.899 2.804 0.538 9.97'
6,702. 00 0.925 3.261 0.757 8.60

Filename: Ditches (north) to Pond 4-182.sc4 Printed 04-19-2001