2022-07-12_PERMIT FILE - C1981019 ‎(24)‎

• Permit No: C1981019
• IBM Index Class Name: Permit File
• Doc Date: 7/12/2022
• Doc Name: Sediment 26 Pond Sediment Control During Mining
• Section_Exhibit Name: Volume 18 Exhibit 7 Item 23 Part C
• Media Type: D
• Archive: No

Stru
#
SWS
#Soil K L (ft) S (%) C P PS #
Sediment
(tons)
Peak
Sediment
Conc.
(mg/l)
Peak
Settleable
Conc
(ml/l)
24VW
(ml/l)
625.3 538,916 307.16 140.18
#8 1 0.300 50.00 12.00 1.0000 0.9000 1 9.1 137,232 78.22 39.94
634.5 521,132 297.03 135.33
#5 634.5 521,132 297.03 135.33
#4 1 0.300 100.00 29.00 1.0000 0.9000 1 34.0 492,403 280.65 150.26
64.5 399,605 120.16 9.22
#3 107.4 260,316 104.19 17.52
#2 1 0.300 50.00 17.00 1.0000 0.9000 1 7.8 195,479 111.42 57.41
2 0.300 75.00 25.00 0.0850 0.9000 1 0.0 1 0.00 0.00
3 0.300 50.00 32.00 1.0000 0.9000 1 54.0 407,119 232.04 122.58
169.2 285,106 131.79 28.57
#1 36.3 15,689 0.00 0.00
Subwatershed Time of Concentration Details:
Stru
#
SWS
#Land Flow Condition Slope (%)
Vert. Dist.
(ft)
Horiz. Dist.
(ft)
Velocity
(fps)Time (hrs)
#2 1
5. Nearly bare and untilled, and
alluvial valley fans 17.00 25.84 152.00 4.120 0.010
#2 1 Time of Concentration: 0.010
#2 2 3. Short grass pasture 24.80 50.09 202.00 3.980 0.014
#2 2 Time of Concentration: 0.014
#2 3
5. Nearly bare and untilled, and
alluvial valley fans 32.00 25.28 79.00 5.650 0.003
#2 3 Time of Concentration: 0.003
#4 1
5. Nearly bare and untilled, and
alluvial valley fans 29.00 100.34 346.00 5.380 0.017
#4 1 Time of Concentration: 0.017
#6 1
5. Nearly bare and untilled, and
alluvial valley fans 31.00 348.75 1,125.00 5.560 0.056
#6 1 Time of Concentration: 0.056
#6 2
5. Nearly bare and untilled, and
alluvial valley fans 6.00 23.46 391.00 2.440 0.044
#6 2 Time of Concentration: 0.044
#7 1
5. Nearly bare and untilled, and
alluvial valley fans 31.00 102.50 330.64 5.560 0.016
#7 1 Time of Concentration: 0.016
#7 2 3. Short grass pasture 4.00 49.80 1,245.00 1.600 0.216
#7 2 Time of Concentration: 0.216
#7 3
5. Nearly bare and untilled, and
alluvial valley fans 4.80 50.20 1,046.00 2.190 0.132
Filename: Section 26 10-Year 24-Hour During Mining.sc4 Printed 03-14-2022
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