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 Pyeatt (2,1,1)
Topsoiled and One Year Two+ Years
Undisturbed Active Reseeded Growth Growth Total

Area (acres) 12.7 156.6 0 0 163.3 332.6
Curve Number 47 87 86 80 67 80
Runoff (in) 0.00 0.47 0.43 0.24 0.03 0.24
Runoff Vol (ac-ft) 0.00 6.13 0.00 0.00 0.41 6.54
Hydraulic Length (ft) 9560
Vertical Distance (ft) 975
Slope (%) 10.2%
Time of Concentration 0.498
K Factor 0.25 0.14 0.25 0.25 0.25 0.20
Lambda(ft) 1520
Theta (degrees) 13.20
LS Factor
C Factor 0.01 1.00 0.45 0.26 0.18 0.56
P Factor 1.00 1.00 0.60 0.60 0.60 0.80
CP Factor 0.01 1.00 0.27 0.16 0.11 0.45
Unit Hydrograph Shape: fast

East Pyeatt (2,2,1)
Topsoiled and One Year Two+ Years
Undisturbed Active Reseeded Growth Growth Total

Area (acres) 24.4 215.6 33.7 75.7 44.4 393.8
Curve Number 47 87 86 80 67 83
Runoff (in) 0.00 0.47 0.43 0.24 0.03 0.34
Runoff Vol (ac-ft) 0.00 8.44 1.21 1.51 0.11 11.28
Hydraulic Length (ft) 9940
Vertical Distance (ft) 980
Slope (%) 9.9%
Time of Concentration 0.519
K Factor 0.25 0.14 0.25 0.25 025 0.19
Lambda(ft) 1400
Theta (degrees) 12.90
LS Factor
C Factor O.D1 1.00 0.45 0.26 0.18 0.66
P Factor 1.00 1.00 0.60 0.60 0.60 0.84
CP Factor 0.01 1.00 0.27 0.16 0.11 0.55
Unit Hydrograph Shape: fast
L_J
P25' l~(30~03