2009-09-21_PERMIT FILE - C1980007A ‎(8)‎

• Permit No: C1980007A
• IBM Index Class Name: Permit File
• Doc Date: 9/21/2009
• Doc Name: 25-Year Surface Water Control Plan
• Section_Exhibit Name: Exhibit 66 Pond MB-3
• Media Type: D
• Archive: Yes

SEDCAD 4 for Windows
23

Pond Inputs:
Initial Pool Elev: 6,064.50 ft
Initial Pool: 2.51 ac-ft
*Sediment Storage: 0.01 ac-ft
Dead Space: 20.00%
*Sediment capacity based on A verage Annual R of 30.0 for 3 year(s)
Emergency Spillway
Pond Results:
Spillway Elev Crest Length Left Right Bottom
(ft) Sideslope Sideslope Width (ft)
6,064.50 10.00 1.00:1 1.00:1 8.00
Peak Elevation: 6,065.14 ft
H'graph Detention Time: 1.34 hrs
Pond Model: CSTRS
Dewater Time: 0.71 days
Trap Efficiency: 96.72%
•
•
Dewatering time is calculated from peak stage to lowest spillway
Elevation-Capacity-Discharge Table

Elevation Area

(ac) Capacity

(ac-ft) Discharge Dewater
Time
(cfs) (hrs)
6,053.16 0.100 0.000 0.000 Top of Sed. Storage
6,053.18 0.100 0.002 0.000
6,053.60 0.109 0.046 0.000
6,054.10 0.120 0.103 0.000
6,054.60 0.130 0.165 0.000
6,055.10 0.140 0.233 0.000
6,055.60 0.150 0.305 0.000
6,056.10 0.160 0.383 0.000
6,056.60 0.170 0.465 0.000
6,057.10 0.180 0.552 0.000
6,057.60 0.190 0.645 0.000
6,058.10 0.200 0.742 0.000
6,058.60 0.210 0.845 0.000
6,059.10 0.220 0.952 0.000
6,059.21 0.220 0.976 0.000
6,059.43 0.225 1.025 0.000
6,059.60 0.229 1.064 0.000
6,060.10 0.240 1.181 0.000
6,060.60 0.255 1.305 0.000
Filename: MB-3(Rev_spillway).sc4
Printed 08-11-2009