Table 1
Allowable Water Velocities
| ||
---|---|---|
Material
|
Allowable Velocity
(Feet per Second)
| |
1.
|
Well established grass on good soil
| |
Short pliant bladed grass
|
5-6
| |
Bunch grass - soil exposed
|
2-4
| |
Stiff stemmed grass
|
2-3
| |
2.
|
Earth without vegetation
| |
Fine sand or silt
|
1-2
| |
Ordinary firm loam
|
2-3
| |
Stiff clay
|
3-5
| |
Clay and gravel
|
4-5
| |
Course gravel
|
4-5
| |
Soft shale
|
5-6
| |
3.
|
Shoulders
| |
Earth
|
See 2 Above
| |
Stabilized
|
6
| |
Paved
|
10-15
|