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
C r,n,r,nhf 1 cm_gni n Pamela I Crhwah
31
Emergency Spillway
Spillway Elev Crest Length Left Right Bottom
(ft) Sideslope Sideslope Width(ft)
6,752.00 20.00 1.50:1 1.50:1 12.00
Perforated Riser
Riser 1 Barrel Number of
Diameter Riser Height Diameter Barrel Barrel Slope Mannings n Spillway Elev Holes per
(in) (ft) (in) Length (ft) (/o) (ft) Elev
i
12.00 8.70 12.00 129.00 9.70 0.0250 6,750.30 2
Pond Results:
Peak Elevation: 6,752.79 ft
Dewater Time: 1.82 days
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
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
6,712.c0 0.327 1.657 0.000
6,743.00 0.341 1.824 0.000
Filename: Prospect Pond 25 Yr 24 Hr Storm Event.sc4 Printed 01-06-2020