2023-04-19_PERMIT FILE - C1981010 ‎(112)‎

• Permit No: C1981010
• IBM Index Class Name: Permit File
• Doc Date: 4/19/2023
• Doc Name: N-Pit Diversion 25-year, 24-Hour Event AMC II
• Section_Exhibit Name: Appendix Q Section XVII
• Media Type: D
• Archive: No

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Subwatershed Hydrology Detail.,
Time of Peak Runoff
Stru SWS SWS Area Conc Musk K Musk X Curve UHS Discharge Volume
# # (ac) (hrs) Number
(hrs) (Cfs) (ac-ft)
#1 1 194.200 0.242 0.000 0.000 71.000 M 15.61 2.481
E 194.200 15.61 2.481
#2 1 44.900 0.158 0.000 0.000 79.000 M 12.58 1.246
1 239.100 26.97 3.727
#3 1 232.900 0.434 0.000 0.000 71.000 M 13.72 2.954
472.000 36.84 6.681
#4 1 20.200 0.128 0.000 0.000 72.000 M 2.29 0.291
492.200 39.09 6.972
#5 1 447.700 0.317 0.000 0.000 72.000 M 37.89 6.346
939.900 74.95 13.318
Subwatershed Time of Concentration Details;
Stru SWS Vert, Dist. Horiz. Dist. Velocity
# # Land Flow Condition Slope(%) (ft) (ft) (fps) Time(hrs)
#1 1 3. Short grass pasture 11.00 130.13 1,183.00 2.650 0.124
8. Large gullies,diversions, and low 11.50 289.80 2,520.00 10.170 0.068
flawing streams
8. Large gullies,diversions, and low 6.50 89.70 1,380.00 7.640 0.050
flowing streams
#1 1 Time of Concentration: 0.242
#2 1 3. Short grass pasture 15.60 250.53 1,606.00 3.150 0.141
8. Large gullies, diversions,and low 11.10 70.04 631.00 9.990 0.017
flowing streams
#2 1 Time of Concentration: 0.158
#3 1 3. Short grass pasture 10.90 259.31 2,379.00 2.640 0.250
8. Large gullies,diversions, and low 9.00 100.17 1,113.00 9.000 0.034
flowing streams
3. Short grass pasture 14.50 120.06 828.00 3.040 0.075
8, Large gullies, diversions,and low 10.30 270.58 2,627.00 9.620 0.075
flowing streams
#3 1 Time of Concentration: 0.434
#4 1 3. Short grass pasture 14.90 180.29 1,210.00 3.080 0.109
8. Large gullies,diversions,and low 9.50 60.13 632.94 9.240 0.019
flowing streams
#4 1 Time of Concentration: 0.128
#5 1 6.Grassed waterway 12.90 59.98 464.96 5.380 0.024
Filename: N-Pit Diversion Project-added another segment to refine riprap requirements-25.24-OSM.Simons.sc4 Printed 09-17-2020