2001-12-11_PERMIT FILE - C1996084 ‎(7)‎

• Permit No: C1996084
• IBM Index Class Name: Permit File
• Doc Date: 12/11/2001
• Section_Exhibit Name: EXHIBIT 15-20 MINE AREA P4 SEDIMENT CONTROL POND 4-3
• Media Type: D
• Archive: No

SEDCAD 4 for Windows
Copyright 1998 Pamela J. Schwab
Civil Software Design

I
•
Subwatershed Time of Concentration Detai/s;
Stru
# SWS
# land Flow Condition Slope (%) Vert. Dist.
(R) Horiz. Dist.
(ft) Velocity
(fps) Time (hrs)
#1 1 1. Forest with heavy ground litter 22.92 55.00 240.00 1.210 0.055
#1 1 Time of Concentration: 0.055
#1 2 s• Nearly bare and unfilled, and
alluvial valley fans 46.67 70.00 150.00 6.830 0.006
#1 2 Time of Concentration: 0.006
#2 1 1. Forest with heavy ground litter 12.50 50.00 400.00 0.890 0.124
#2 1 Time of Concentration: 0.124
#2 2 5. Nearly bare and unfilled, and
alluvial valley fans 38.89 70.00 180.00 6.230 0.008
#2 2 Time of Concentration: 0.008
#2 3 1. Forest with heavy ground litter 33.33 10.00 30.00 1.460 0.005
#2 3 Time of Concentration: 0.005
#3 1 3. Short grass pasture 20.00 10.00 50.00 3.570 0.003
#3 1 Time of Concentration: 0.003
#3 2 5. Nearly bare and unfilled, and
alluvial valley fans 33.00 49.50 150.00 5.740 0.007
#3 2 Time of Concentration: 0.007
Filename: Ditches Pond 4-3 (except D-1).sc4 Printed 04-18-2001