2020-03-31_PERMIT FILE - C1981019A ‎(12)‎

• Permit No: C1981019A
• IBM Index Class Name: Permit File
• Doc Date: 3/31/2020
• Doc Name: Spoil Pile Collector Ditches
• Type & Sequence: TR136
• Section_Exhibit Name: Volume 18 Exhibit 7 Item 23 Part B
• Media Type: D
• Archive: Yes

SEDCAD 4 for Windows
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11
Structure #3(Null)
Structure #2 (Pond)
Section 26 Pond
Pond Inputs:
Initial Pool Elev: 6,982.00 ft
Initial Pool: 1.57 ac-ft
*Sediment Storage: 0.00 ac-ft
Dead Space: 0.00%
*No sediment capacity defined
Emergency Spillway
Spillway Elev Crest Length Left Right Bottom
(ft) Sideslope Sideslope Width(ft)
6,986.00 20.00 2.50:1 2.50:1 20.00
Perforated Riser
Riser Barrel Number of
Diameter Riser Height Diameter Barrel Barrel Slope Manning's n Spillway Elev Holes per
(in) (ft) (in) Length(ft) (h)) (ft) Elev
18.00 14.00 18.00 200.00 4.001 0.0240 6,982.00 2
Pond Results:
Peak Elevation: 6,982.95 ft
H'graph Detention Time: 0.33 hrs
Pond Model: CSTRS
Dewater Time: 1.60 days
Trap Efficiency: 72.67%
Dewatering time is calculated from peak stage to lowest spillway
Elevation-Capacity-Discharge Table
Area Capacity Discharge Dewater
Elevation Time
(ac) (ac-ft) (mss) (hrs)
6,968.00 0.000 0.000 0.000 Top of Sed. Storage
6,969.00 0.001 0.000 0.000
6,970.00 0.021 0.009 0.000
6,971.00 0.030 0.035 0.000
6,972.00 0.045 0.072 0.000
6,973.00 0.060 0.124 0.000
Filename:West Side Temp Spoil Pile 10 Yr 24 Hr.sc4 Printed 12-31-2019