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Table A: Culvert Diameters (Inches) for Flat Conditions
Slopes Upstream 0-0.05%
Stream |
Stream Depth (Ft.) |
|
0.5 |
1.0 |
1.5 |
2.0 |
2.5 |
3.0 |
3.5 |
4.0 |
|
|
1 |
12 |
12 |
- |
- |
- |
- |
- |
- |
2 |
12 |
12 |
18 |
24 |
- |
- |
- |
- |
3 |
12 |
15 |
18 |
24 |
30 |
36 |
- |
- |
4 |
12 |
18 |
21 |
27 |
33 |
36 |
42 |
- |
5 |
12 |
18 |
21 |
30 |
36 |
42 |
48 |
54 |
6 |
12 |
21 |
24 |
33 |
42 |
42 |
54 |
60 |
7 |
15 |
21 |
24 |
36 |
42 |
48 |
60 |
60 |
8 |
15 |
24 |
30 |
36 |
42 |
54 |
60 |
2-48 |
9 |
15 |
24 |
33 |
42 |
48 |
54 |
60 |
2-54 |
10 |
18 |
27 |
36 |
42 |
48 |
60 |
2-42 |
2-54 |
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