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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16
Subwatershed Hydro%gy Detai/;

Stru
#
SWS
#
SWS Area
(ac) Time of
Conc

(hrs)
Musk K
(hrs)
Musk X
Curve
Number
UHS Peak
Discharge

(cfs) Runoff
Volume

(ac-ft)
#1 1 500.000 0.200 0.200 0.000 70.000 S 116.23 23.089
500.000 101.95 23.089
#2 1 96.090 0.481 0.461 0.303 75.000 M 35.09 6.169
596.090 32.69 29.258
#3 1 62.250 0.167 0.167 0.385 55.000 M 1.30 0.635
2 47.760 0.061 0.061 0.426 55.000 M 2.42 0.487
706.100 34.79 30.380
#4 1 29.750 0.094 0.094 0.414 51.000 M 0.20 0.145
735.850 34.90 30.525
Subwatershed Sedimento%gy Detai/.•

Stru
#
SWS
#
Soil K
L (ft)
5 (%)
C
P
PS #
Sediment
(tons) Peak
Sedoncent

(mg/I) Peak
~Con~ble

(ml/I)
24VW
(ml/I)
#1 1 0.280 1,000.00 0.01 0.0010 1.0000 1 0.1 12 0.00 0.00
0.1 11 0.00 0.00
#2 1 0.280 1,550.00 7.50 0.5100 0.3800 1 375.0 96,370 29.65 16.77
79.4 21,045 0.00 0.00
#3 1 0.280 1,337.50 21.80 0.0100 0.4100 1 1.8 3,718 1.14 0.76
2 0.280 850.00 16.10 0.0200 0.4300 1 2.4 6,981 3.42 1.78
83.6 20,021 0.40 0.20
#4 1 0.280 975.00 23.80 0.0400 0.6400 1 1.5 9,121 4.46 3.84
84.9 20,387 0.54 0.27
Subwatershed Time of Concentration Detai/s:

Stru
# SWS
# Land Flow Condition Slope (%) Vert. Dist.
(ft) Horiz. Dist.
(ft) Velocity
(fps) Time (hrs)
#2 1 3. Short grass pasture 3.46 80.00 2,300.00 1.490 0.428
6. Grassed waterway 12.00 120.00 1,000.00 5.190 0.053
#2 1 Time of Concentration: 0.481
#3 1 6. Grassed waterway 18.57 260.00 1,400.00 6.460 0.060.
Filename: WestPit-100yr.sc4 Printed 07-15-2002