2021-09-03_PERMIT FILE - C1981019 ‎(5)‎

• Permit No: C1981019
• IBM Index Class Name: Permit File
• Doc Date: 9/3/2021
• Doc Name: Collom Haul Road Channel Configurations
• Type & Sequence: TR149
• Section_Exhibit Name: Exhibit 7, Item 25E
• Media Type: D
• Archive: No

Subwatershed Hydrology Detail:
Stru
#
SWS
#
SWS Area
(ac)
Time of
Conc
(hrs)
Musk K
(hrs)Musk X Curve
Number UHS
Peak
Discharge
(cfs)
Runoff
Volume
(ac-ft)
#6 1 2.300 0.135 0.000 0.000 85.000 F 1.38 0.120
2.300 1.38 0.120
#5 1 0.500 0.002 0.000 0.000 85.000 F 0.36 0.023
2.800 1.63 0.143
#9 1 17.500 0.087 0.000 0.000 47.000 S 0.00 0.000
2 0.200 0.135 0.000 0.000 85.000 F 0.12 0.007
17.700 0.12 0.007
#7 17.700 0.12 0.007
#4 1 20.800 0.100 0.000 0.000 47.000 S 0.00 0.000
2 1.000 0.005 0.000 0.000 85.000 0.73 0.054
21.800 0.73 0.054
#3 21.800 0.73 0.054
#2 1 3.600 0.147 0.000 0.000 85.000 F 2.16 0.188
25.400 2.71 0.242
#1 1 0.500 0.002 0.000 0.000 85.000 F 0.36 0.023
43.600 3.18 0.272
#8 46.400 4.81 0.415
Subwatershed Time of Concentration Details:
Stru
#
SWS
#Land Flow Condition Slope (%)
Vert. Dist.
(ft)
Horiz. Dist.
(ft)
Velocity
(fps)Time (hrs)
#1 1
5. Nearly bare and untilled, and
alluvial valley fans 50.00 32.00 64.00 7.070 0.002
#1 1 Time of Concentration:0.002
#2 1
5. Nearly bare and untilled, and
alluvial valley fans 2.80 24.83 887.00 1.670 0.147
#2 1 Time of Concentration:0.147
#4 1 3. Short grass pasture 30.00 473.10 1,577.00 4.380 0.100
#4 1 Time of Concentration:0.100
#4 2
5. Nearly bare and untilled, and
alluvial valley fans 53.50 74.90 140.00 7.310 0.005
#4 2 Time of Concentration:0.005
#5 1
5. Nearly bare and untilled, and
alluvial valley fans 50.00 37.50 75.00 7.070 0.002
#5 1 Time of Concentration:0.002
Filename: C-8 C-9 Channels 10-yr 24-hr.sc4 Printed 06-16-2021
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