2003-06-30_PERMIT FILE - C1981010A ‎(3)‎

• Permit No: C1981010A
• IBM Index Class Name: Permit File
• Doc Date: 6/30/2003
• Doc Name: East Pyeatt Hydrologic Model
• Section_Exhibit Name: Appendix Q Section VIII
• Media Type: D
• Archive: Yes

Watershed Hydrology and Sedimentology Parameters
East PyeaK (3,1,f)
Topsoiled and One Year Two+ Years
Undisturbed Active Reseeded Growth Growth Total

Area (acres) 37.1 19.5 0 0 96.5 153.1
Curve Number 47 87 86 80 67 71
Runoff (in) 0.00 0.47 0.43 0.24 0.03 0.08
Runoff Vol (ac-ft) 0.00 0.76 0.00 0.00 0.24 1.01
Hydraulic Length (ft) 4400
Vertical Distance (ft) 335
Slope (%) 7.6%
Time of Concentration 0.295
K Factor 0.25 0.14 0.25 0.25 0.25 0.24
Lambda(ft) 1280
Theta (degrees) 9.80
LS Factor
C Factor 0.01 1.00 0.45 0.26 0.18 0.24
P Factor 1.00 1.00 0.60 0.60 0.60 0.75
CP Factor 0.01 1.00 0.27 0.16 0.11 0.18
Unit Hydrograph Shape: fast
• EastPyeaK(3,1,2)
Topsoiled and One Year Two+ Years
Undisturbed Active Reseeded Growth Growth Total

Area (acres) 51.6 0 0 0 0 51.6
Curve Number 47 87 86 80 67 47
Runoff (in) 0.00 0.47 0.43 0.24 0.03 0.00
Runoff Vol (ac-ft) 0.00 0.00 0.00 0.00 0.00 0.00
Hydraulic Length (ft) 2420
Vertical Distance (ft) 245
Slope (%) 10.1%
Time of Concentration 0.206
K Factor 0.25 0.14 0.25 0.25 0.25 0.25
Lambda(ft) 880
Theta (degrees) 17.00
LS Factor
C Factor 0.01 1.00 0.45 0.26 0.18 0.01
P Factor 1.00 1.00 0.60 0.60 0.60 1.00
CP Factor 0.01 1.00 0.27 0.16 0.11 0.01
Unit Hydrograph Shape: slow

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