2001-12-11_PERMIT FILE - C1981019

• Permit No: C1981019
• IBM Index Class Name: Permit File
• Doc Date: 12/11/2001
• Section_Exhibit Name: Exhibit 07 Item 03 Design of Surface Runoff Control Stuctures
• Media Type: D
• Archive: No

Table 5
Culverts M thru R
Item ~61.r~
(1) (2) - /N/ltl
Culvert Dezignation M -/ p
u~ ~~' /
Location Haul L
H
Road R
Drainage Area (acres) 63.5 ba.i to.~
Design Category Mining Mining Mining
Duration Duration Duration
Design Precipitation Frequency (years) )0 10 10
Runoff coefficient 0.47 0.47 0.43
Roinfall Intensity (in/hr) 0.77 0.77 0.77
Average Drainage Slope (%) 20.2 19,8 12,4
Required Capacity (cfs) 29,0 29.6 8.3
Installed Pipe:
Diameter (inches)
Approx. Slope (%)
Capaci ry(1) (cfs)
Velocity(1) (ft/sec)
(1) With culvert flowing full
1
Iverts
r~ •
P Q R
Haul Gossard Load
Road Loadout (2) Out
20.7 79.7 1.8
Mining Mining Mining
Duration Duration Duration
10 10 10
0.44 0.42 0.52
0.77 0.77 0.77
11.6 1.2 5.0
10.0 17.6 1.4
36 48 24 18 30 30
0.7 0.5 0.5 1.2 1.0 0.9
48 85 14 10 36 36
6.8 6.7 4.5 5,6 7.:i 7,3
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