Surface Stabilization Schedule
| |
---|---|
Soil Disturbance Activity or Condition
|
Required Stabilization Time
|
Soil disturbance has ceased in areas greater than 2,000 square
feet
|
14 days
|
After construction of dikes, swales, diversions, and other concentrated
flow areas
|
5 days
|
When slopes are steeper than 3 horizontal to 1 vertical
|
7 days
|
When slopes are greater than 3% and longer than 150 feet
|
14 days
|
Perimeter controls around soil stockpiles
|
End of workday
|
Stabilization or covering of inactive stockpiles
|
30 days
|
When land disturbance is completed, permanent soil stabilization
must be installed
|
30 days
|
District
|
Minimum percent impervious
|
---|---|
"R-1", Single-family
|
45
|
"R-2", Single-family
|
50
|
"R-3", Multiple-family
|
70
|
"R-4", Planned Mobile Home Park
|
60
|
"B-1", Central Business
|
90
|
"B-2", Highway Business
|
90
|
"B-3", Neighborhood Business
|
75
|
"I-1", Industrial
|
90
|
"NU", Non-Urban
|
5
|
Parking, Streets, Roofs
|
100
|
Pipe
|
Arterials, Collectors, Cul-de-sac
|
Acceptable Location Right-of-Way (other than arterials, collectors,
cul-de-sacs)
|
Easements
|
---|---|---|---|
RCP
|
X
|
X
|
X
|
HP
|
X
|
X
|
X
|
HDPE
|
X
|
X
| |
VCP
|
X
| ||
DIP
| |||
CMP
|
X
|
X
|
Circular Culvert Pipe
| |||
---|---|---|---|
Diameter (inches)
|
Gage
|
Diameter (inches)
|
Gage
|
12
|
16
|
42
|
14
|
15
|
16
|
48
|
14
|
18
|
16
|
54
|
12
|
24
|
16
|
60
|
12
|
30
|
16
|
72
|
10 up to 16 feet
|
36
|
16
|
Arch Culvert Pipe
| |||
---|---|---|---|
Equivalent Diameter (inches)
|
Gage
|
Span (inches)
|
Rise (inches)
|
15
|
16
|
18
|
11
|
18
|
16
|
22
|
13
|
21
|
16
|
25
|
16
|
24
|
14
|
29
|
18
|
30
|
14
|
36
|
22
|
36
|
14
|
43
|
27
|
42
|
12
|
50
|
31
|
48
|
12
|
58
|
36
|
54
|
12
|
65
|
40
|
Wherever corrugated metal culverts are installed on railroad
property which is occupied by tracks or which may be occupied by tracks
at any time in the future, then it shall conform to the A.R.E.A. "Specifications
for Corrugated Metal Culverts."
|
Diameter of Pipe (inches)
|
Minimum Gage of Metal
|
---|---|
12 to 18
|
14
|
20 to 24
|
12
|
26 to 36
|
10
|
38 to 60
|
8
|
Pipes larger than sixty (60) inches require special considerations
and special specifications.
|
Corrugated metal storm sewer pipe shall be handled in such a
manner that it is not chipped, dented or bent. If in handling the
culvert the base metal is exposed in any way then it shall be rejected
or repaired to the satisfaction of the Engineer.
|
Neutral Axis Diameter (inches)
|
Minimum Gage
|
---|---|
48
|
8
|
60
|
8
|
62
|
7
|
72
|
7
|
74
|
5
|
84
|
5
|