2011-12-29_PERMIT FILE - C1981012A ‎(3)‎

• Permit No: C1981012A
• IBM Index Class Name: Permit File
• Doc Date: 12/29/2011
• Section_Exhibit Name: Section 2.05 Operation and Reclamation Plan
• Media Type: D
• Archive: Yes

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TR -55
Table 21
Culvert Sizing
Culvert Number
10 -24 Hour
I Minimum
Comments
Peak Discharge (CFS)j
Diameter Inches
49
54.05
42
TR- 2710/15/93
50
4.05
18
TR- 2710/15/93
51
55
42
TR- 2710/15/93
52
48.59
36
TR- 2710/15/93
53
6.4
21
TR- 2710/15/93
54
75.51
48
TR- 2710/15/93
55
1.01
8
May -95
56
4.39
18
57
51.22 17)
1 @48" or 2 @33"
May -95
58
1.45
12
May -95
59
4.81
18
TR -55 03/11
60
12.38 (7)
24
May -95
61
0.95
8
May -95
62
0.68
12
Sep -95
63
1.28
12
Sep -95
64
8.75
24
65
0.1
12
66
0.43
12
TR -55 03/11
67
2.23
18
TR -55 03/11
68
2.67
18
TR -55 03/11
69
3.76
18
TR -55 03/11
RDA -A
2.31
12
TR -28 9/93
RDA•B
4.02
15
TR -28 9/93
Relief Drains
(1)
From "Handbook of Steel Drainage and Highway Construction Products"
nomograph with no head on pipe and using HW /D Scale No. (3).
(Z)
Sized using aft. of head on pipe (HW /D = 1.5), HW /D Scale No. (1).
(3)
Sized using 2.4 ft. of head on pipe (HW /D = 1.8), HW /D Scale No. (3).
(4)
Culverts 23 & 24 are inlet culverts to Culvert 25. Culvert 25 was sized using the
Hazen - Williams formula Exhibit 19,West Portal Data C21 through C -25.
(5)
Sized using aft. of head on pipe (HW /0 = 1.5), HW /D Scale No. (1).
(6)
AS built 3/27/88 SDM
(7)
100 -year 24 -hour peak discharge. Temporary culverts installed as needed.
Temporary culverts installed as needed
2.05 -14A
03/11