PERMFILE135209

• Permit No: C1981019A
• IBM Index Class Name: Permit File
• Doc Date: 9/2/2004
• Doc Name: Attachment 1 to 9
• Section_Exhibit Name: Exhibit 7 West Pit Pond - 008A
• Media Type: D
• Archive: Yes

SEDCAD 4 for Windows
CnmIFnF~ 1000. Pamela I SrFwaF
12

Initial Pool Elev: 6,830.00
Initial Pool: 5.48 ac-R
*Sediment Storage: 0.02 ac-ft
Dead Space: 20.00
*No sediment capacity defined
Perforated Riser
Riser Riser Height Barrel Barrel Barrel Slope Number of
'
Diameter (ft) Diameter Length (ft) (o/a) Manning
s n Spillway Elev Holes per
(in) (in) Elev
18.00 11.60 18.00 173.00 8.70 0.0250 6,837.00 3
Emergency SDillway
Pond Results:
C
Spillway Elev Crest Length Left Right Bottom
(ft) Sideslope Sideslope Width (ft)
6,838.00 21.00 1.50:1 1.50:1 24.00
Peak Elevation: 6,832.41
H'graph Detention Time: 10.11 hrs
Pond Model: CSTRS
Dewater Tme: 1.05 days
Trap Efficiency: 63.54 ^/o
Dewatering time is calculated from peak stage to lowest spillway
Elevation-Capacity-Discharge Table
.,
,.

Elevation Area

(ac) Capacity

(ac-ft) Discharge Dewater
Time
(ds) (ham)
6,821.00 0.131 0.000 0.000 Top of Sed. Storage
6,821.50 0.275 0.099 0.000
6,822.00 0.474 0.284 0.000
6,822.50 0.499 0.527 0.000
6,823.00 0.525 0.783 0.000
6,823.50 0.545 1.051 0.000
6,824.00 0.564 1.328 0.000
6,824.50 0.584 1.615 0.000
6,825.00 0.604 1.912 0.000
6,625.40 0.620 2.157 0.000
6,625.50 0.624 2.219 0.000
6,626.00 0.644 2.536 0.000
Filename: WestPit-26yr.sc4 Printed 07-16-2002