PERMFILE106609

• Permit No: C1981019A
• IBM Index Class Name: Permit File
• Doc Date: 9/2/2004
• Doc Name: Attachment 10 to 12
• Section_Exhibit Name: Exhibit 7 West Pit Pond - 008A
• Media Type: D
• Archive: Yes

SEDCAD 4 for Windows
(`nmirin Mt 1°OA Pamula I Srbun6
12

Initial Pool Elev: 6,830.00
Initial Pool: 5.48 ac-ft
*Sediment Storage: 0.00 ac-ft
Dead Space: 20.00
*No sediment capacity defined
Perforated Riser
Riser Riser Height Barrel garret Barrel Slope Number of
'
Diameter (ft) Diameter Length (R) (%) Mapping
s n Spillway Elev Holes per
(in) (in) Elev
18.00 11.601 18.00 173.00 8.70 0.0250 6,837.00 3
Emergency Spillway
Spillway Elev Crest Length Left Right Bottom
(R) Sideslope Sideslope Width (R)
6,838.00 21.00 1.50:1 1.50:1 24.00
Pond Results:
•
Peak Elevation: 6,838.54
H'graph Detention Time: 13.79 hrs
Pond Model: CSTRS
DewaterTme: 2.00 days
Trap Effciency: 42.93
Dewatering time is ca/culated from peak stage to lowest spillway
Elevation-Capacity-Discharoe Table

Elevation Area

(ac) capacity

(ac-R) Discharge

(cfs) Dewater
Time
(hrs)
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 0.264 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 O.D00
6,825.40
6,825.50 0.620
0.624 2.157
2.219 0.000
0.000
6,826.00 0.644 2.536 0.000
Filename: WestPit-FreeboardDesign.sc4 Printed 07-16-2002