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
f nrnmnht 1 QQA-9f11 fl Pamola I Crhwah
14
Simons/OSM Method - Steep Slope Design
w/o Freeboard w/Freeboard
Design Discharge: 22.84 cfs
Depth: 0.26 ft 1.26 ft
Top Width: 13.04 ft 17.04 ft
Velocity*:
X-Section Area: 3.26 sq ft
Hydraulic Radius: 0.248 ft
Froude Number*:
------- - - -- -
Manning's n*:
Dmin: 1.00 in
D50: 3.00 in
Dmax: 3.75 in
Velocity and Manning's n calculations may not apply for this method.
Structure #19(Null)
Collection point Subwshd Q2
Structure #10(Pond)
Sedtrap at subwshd U, AA, AB
Pond Inputs:
Initial Pool Elev: 92.50 ft
Initial Pool: 0.20 ac-ft
Emergency Spillway
Spillway Elev Crest Length Left Right Bottom
(ft) Sideslope Sideslope Width(ft)
100.00 20.00 2.00:1 2.00:1 20.00
Pond Results:
Peak Elevation: 100.33 ft
Dewater Time: 0.53 days
Dewatering time is calculated from peak stage to lowest spillway
Elevation-Capacity-Discharge Table
Filename: Prospect Pond 25 Yr 24 Hr Storm Event.sc4 Printed 01-06-2020