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
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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 Barrel Barrel Slope Number of
'
Diameter (ft) Diameter Length (ft) (°7°) 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 Spillway
Pond Results:
•
Spillway Elev Crest Length Left Right Bottom
(ft) Sideslope Sideslope Wid[h (ft)
6,838.00 21.00 1.50:1 1.50:1 24.00
Peak Elevation: 6,834.01
H'graph Detention Time: 12.45 hrs
Pond Model: CSTRS
Dewater Time: 1.38 days
Trap Efficiency: 52.15
Dewatering time is calculated from peak stage to lowest spil/way
Elevation-Capacity-Discharge Table

Elevation Area

(ac) Capacity

(ac-ft) Discharge Dewater
Tme
(6s) (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
6,825.00 0.564
0.604 1.615
1.912 0.000
0.000
6,825.40 0.620 2.157 0.000
6,825.50 0.624 2.219 0.000
6,826.00 0.644 2.536 0.000
Filename: WestPit-100yr.sc4 Printed 07-16-2002