PERMFILE107487

• Permit No: C1996084
• IBM Index Class Name: Permit File
• Doc Date: 12/11/2001
• Doc Name: Figure Crooked
• Section_Exhibit Name: EXHIBIT 15 MINE AREA P3 SEDIMENT CONTROL POND 3-1
• Media Type: D
• Archive: No

SEDCAD 4 for Windows
Copyright 1998 Pamela J Schwah
Civil Software Design
•
Structure #2 (Null1
South ditch
Structure #1 (Null
North Ditch
Structure #3 (Pond)
Pond
Pond Inputs:
Structure Detai/:
Initial Pool Elev: 6,660.50
Initial Pool: 0.90 a[-ft
*Sediment Storage: 3.91 ac-ft
Dead Space: 20.00
*Sediment capacity based on Average Annual R of 70.0 for 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) ~~_ Elev
X6.00 13.00 ' 16.00 80.00 7.00 0.0240 6,664.00 2
- ~ ~~~
Peak Elevation: 6,664.19
H'graph Detentlon Tme: 15.36 hrs
Pond Model: CS7RS
Dewater Time: 4.25 days
Trap Efficiency: 93.59
Dewatering time is calculated from peak stage to lowest spillway
Elevation-Capacity-Discharge Table
•
Pond Results:
Area Capacity Discharge Dewater
Elevation Time
(ac) (ac-ft) (~s) (hrs)
6,658.97 0.564 0.000 0.000 Top of Sed. Storage
6,659.00 0.565 0.019 0.000
6,659.50 0.580 0.305 0.000
6,660.00 0.596 0.599 0.000
6,660.50 0.612 0.901 0.000 Low hole SPW #1
Filename: Pond 3-1 ezc..sc4 Printed 04-17-2001