2020-03-31_PERMIT FILE - C1981019A ‎(13)‎

• Permit No: C1981019A
• IBM Index Class Name: Permit File
• Doc Date: 3/31/2020
• Doc Name: Prospect Sedimentation Pond
• Type & Sequence: TR136
• Section_Exhibit Name: Exhibit 07 Item 20 Part PP
• Media Type: D
• Archive: Yes

SEDCAD 4 for Windows
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39
Riser Barrel Number of
Riser Height Barrel Barrel Slope Spillway Elev
Diameter (ft) Diameter Length(ft) (oho Mannings n Holes per
(in) (in) ) (ft) Elev
12.00 8.70 12.00 129.00 9.701 0.0250 6,750.30 2
Pond Results:
Peak Elevation: 6,751.67 ft
H'graph Detention Time: 10.25 hrs
Pond Model: CSTRS
Dewater Time: 1.46 days
Trap Efficiency: 44.98 WO
Dewatering time is calculated from peak stage to lowest spillway
Elevation-Capacity-Discharge Table
Area Capacity Discharge Dewater
Elevation Time
(ac) (ac-ft) (cfs) (hrs)
6,734.00 0.029 0.000 0.000 Top of Sed. Storage
6,734.01 0.030 0.000 0.000
6,734.50 0.055 0.021 0.000
6,735.00 0.088 0.056 0.000
6,735.50 0.102 0.104 0.000
6,736.00 0.117 0.158 0.000
6,736.50 0.133 0.221 0.000
6,737.00 0.149 0.291 0.000
6,737.50 0.167 0.370 0.000
6,738.00 0.185 0.458 0.000
6,738.50 0.205 0.555 0.000
6,739.00 0.225 0.662 0.000
6,739.50 0.247 0.780 0.000
6,740.00 0.269 0.909 0.000
6,740.50 0.281 1.047 0.000
6,741.00 0.293 1.190 0.000
6,741.50 0.305 1.340 0.000
6,741.60 0.308 1.370 0.000
6,742.00 0.317 1.495 0.000
6,742.50 0.329 1.657 0.000
6,743.00 0.341 1.824 0.000
6,743.50 0.353 1.998 0.000
6,744.00 0.365 2.177 0.000 Low hole SPW#2
6,744.50 0.377 2.363 0.594 3.78*
6,745.00 0.390 2.555 0.840 2.76*
Filename. Prospect Pond 10 Yr 24 Hr Storm Event.sc4 Printed 01-06-2020