2001-12-11_PERMIT FILE - C1996084 ‎(8)‎

• Permit No: C1996084
• IBM Index Class Name: Permit File
• Doc Date: 12/11/2001
• Section_Exhibit Name: EXHIBIT 15-19 MINE AREA P4 SEDIMENT CONTROL POND 4-1
• Media Type: D
• Archive: No

SEDCAD 4 for Windows
Copyright 1998 Pamela J Schwab
Civil Software Design
•
Structure #1 (Null)
North ditch
Structure #i (Null)
South ditch
Structure #3 Lond,~
Pond
Pond Inputs:
Structure Detai/;
Initial Pool Elev: 6,701.50
Initial Pool: 0.42 ac-ft
*Sediment Storage: 4.42 ac-ft
Dead Space: 20.00
'Sediment capacity based on Average Annual R of70.0 far 3 year(s)
Perforated Riser
•
Riser Riser Height Barrel Barrel Barrel Slope Number of
'
Diameter (R) Diameter Length (ft) (%) Manning
s n Spillway Elev Holes per
(In) (in)s- Elev
8.00 8.00 ~ 6.00 100.00 5.00 0.0240 ~ 6,704.00 3
(( /' `~ ~
Pond Results:
Peak Elevation: 6,706.87
H'graph Detention Tme: 17.05 hrs
Pand Model: CSTRS
Dewater Time: 4.43 days
Trap Efficiency: 92.55
Dewatering time is calculated from peak stage to lowest spillway
Elevation-Capacity-Discharge Table
•
Area Capacity Discharge Dewater
Elevation Time
(ac) (ac-k) (~s) (ham)
6,701.03 0.876 0.000 0.000 Top of Sed. Storage
6,701.50 0.899 0.421 0.000 Low hole SPW #1
6,702.00 0.925 0.877 0.223 24.77*
6,702.50 0.951 1.346 0.371 15.30"
6,703.00 0.977 1.828 0.465 12.55"

Filename: Pond 4-1 and 2.sc4 Printed 04-26-2001