SW4210703_Supplement-EZ Form_20210914

LOW DENSITY
DESIGN RE
UIREMENTS FOR LOW DENSITY PROJECTS FROM 02H .1003
1
Is project below density thresholds set forth In the applicable stormwater rule_? _
Yes
2
Does project maximize dispersed Bow and minimize channelization of flow?
Yes
3
Has the use of piping been minimized per .1003(2)(c)?
Yes
4
Side slopes of the vegetated conveyances (H:V) _
3 to 1
_ 5
Maximum velocity in the vegetated conveyances during the 10-year storm?
4.7
6
Are curb outlet swales proposed?
Yes
7
Maximum longitudinal slope of curb outlet swale(s) (°lo)
1%
8
Bottom width of curb outlet swale(s) (feet)
4 ft
9
Maximum side slope of curb outlet swale(s) (H:V)
3 to 1
10
_
Minimum length of curb outlet swale(s) (feet)
100 ft
11
Are treatment swales used instead of curb outlet swales?
No
12
_ _ _
Is stormwater released at the edge of the setback as dispersed Bow?
Yes
13
Have stormwater outlets been designed to prevent downslope erosion? _
Yes
14
JAre variations to rule .1003 proposed?
No
ADDITIONAL
INFORMATION
15
Please use this space to provide any additional information about this low density project:
Swale #
Drainage
Area
ac
BUA
(ac)
Pervious
area
ac
C
Q
(cfs)
Slope
(°/o)
V.I.
(fps)
V,�,,,
(fps)
Flow
depth (ft)
Swale ID
1
0.90
0.27
0.63
0.65
4.1
2.5%
6.0
3.66
0.28
1-3
2
0.30
0.09
0.21
0.65
1.4
3.2%
6.0
3.10
0.11
1-6
3
0.30
0.09
0.21
0.65
1.4
4.4%
6.0
3.50
0.10
1-7
4
0.60
0.18
0.42
0.65
2.7
3.5%
6.0
3.85
0.18
1-8
6
0.40
0.12
0.28
0.65
1.8
2.3%
6.0
2.98
0.16
1-9
6
0.68
0.20
0.48
0.66
3.1
2.1%
6.0
3.24
0.31
1-10A
7
0.67
0.20
0.47
0.65
3.0
2.1%
6.0
3.24
0.31
1-10B
8
1.11
0.33
0.78
0.65
5.0
4.1%
6.0
4.71
0.28
2-1
9
0.65
0.17
0.39
0.65
2.5
4.1 %
6.0
1 3.97
0.16
2-2
10
0.30
0.09
0.21
0.65
1.4
4.1 %
6.0
3.38
0.10
24
11
1.40
0.42
0.98
o.65
6.3
3.0%
6.0
4.29
0.37
2-5
12
0.20
0.06
0.14
0.65
0.9
2.3%
6.0
2.42
0.09
2-6
13
0.50
0.15
0.35
0.65
2.3
1.5%
6.0
2.64
0.21
2-7
14
0.40
0.12
0.28
0.65
1.8
1.5%
6.0
2.52
0.18
2-8
15
0.47
0.14
0.33
0.65
2.1
2.0%
6.0
1 2.91
0.22
2-9A
16
0.50
0.15
0.35
0.65
2.3
2.0%
6.0
2.96
0.24
2-9B
17
10.3
2.63
7.67
0.63
45.1
1.0%
6.0
3.79
1.37
COS 1
18
4.9
1.47
3.43
0.65
22.1
1.0%
6.0
3.17
0.78
COS 2
19
20
21
22
23
24
25
26
27
28
29
30