Q = CIA
|
Where:
| ||||
---|---|---|---|---|
Q
C
I
A
|
=
=
=
=
|
The volume in cubic feet per second.
The runoff factor.
The intensity of rainfall in inches per hour.
The watershed area in acres.
|
Land Use
|
Runoff Factor "C"
| |
---|---|---|
Parklands, golf courses, etc.
|
0.15 to 0.30
| |
Open residential
|
0.30 to 0.50
| |
Dense residential and business
|
0.50 to 0.70
| |
Commercial and industrial
|
0.70 to 0.90
|
Design Speed of Uncontrolled Street
(miles per hour)
|
Minimum Required Sight Distance
(feet)
| |
---|---|---|
25
|
250
| |
30
|
300
| |
35
|
350
| |
40
|
400
| |
45
|
450
| |
50
|
500
|
Angle of Parking Space
|
One-Way Aisle
(feet)
|
Two-Way Aisle
(feet)
| |
---|---|---|---|
90º
|
22
|
24
| |
60º
|
18
|
20
| |
45º
|
15
|
20
| |
30º
|
12
|
18
| |
Parallel
|
12
|
18
|
Table 1
Green Infrastructure BMPs for Groundwater Recharge, Stormwater
Runoff Quality, and/or Stormwater Runoff Quantity
| ||||
---|---|---|---|---|
Best Management Practice
|
Stormwater Runoff Quality TSS Removal Rate
(percent)
|
Stormwater Runoff Quantity
|
Groundwater Recharge
|
Minimum Separation from Seasonal High Water Table
(feet)
|
Cistern
|
0
|
Yes
|
No
|
—
|
Dry well(a)
|
0
|
No
|
Yes
|
2
|
Grass swale
|
50 or less
|
No
|
No
|
2(e)
1(f)
|
Green roof
|
0
|
Yes
|
No
|
—
|
Manufactured treatment device(a) (g)
|
50 or 80
|
No
|
No
|
Dependent upon the device
|
Pervious paving system(a)
|
80
|
Yes
|
Yes(b)
No(c)
|
2(b)
1(c)
|
Small-scale bioretention basin(a)
|
80 or 90
|
Yes
|
Yes(b)
No(c)
|
2(b)
1(c)
|
Small-scale infiltration basin(a)
|
80
|
Yes
|
Yes
|
2
|
Small-scale sand filter
|
80
|
Yes
|
Yes
|
2
|
Vegetative filter strip
|
60 to 80
|
No
|
No
|
—
|
Table 2
Green infrastructure BMPs for Stormwater Runoff Quantity (or
for Groundwater Recharge and/or Stormwater Runoff Quality with a Waiver
or Variance from N.J.A.C. 7:8-5.3)
| ||||
---|---|---|---|---|
Best Management Practice
|
Stormwater Runoff Quality TSS Removal Rate
(percent)
|
Stormwater Runoff Quantity
|
Groundwater Recharge
|
Minimum Separation from Seasonal High Water Table
(feet)
|
Bioretention system
|
80 or 90
|
Yes
|
Yes(b)
No(c)
|
2(b)
1(c)
|
Infiltration basin
|
80
|
Yes
|
Yes
|
2
|
Sand filter(b)
|
80
|
Yes
|
Yes
|
2
|
Standard constructed wetland
|
90
|
Yes
|
No
|
N/A
|
Wet pond(d)
|
50-90
|
Yes
|
No
|
N/A
|
Table 3
BMPs for Groundwater Recharge, Stormwater Runoff Quality, and/or
Stormwater Runoff Quantity only with a Waiver or Variance from N.J.A.C.
7:8-5.3
| ||||
---|---|---|---|---|
Best Management Practice
|
Stormwater Runoff Quality TSS Removal Rate
(percent)
|
Stormwater Runoff Quantity
|
Groundwater Recharge
|
Minimum Separation from Seasonal High Water Table
(feet)
|
Blue roof
|
0
|
Yes
|
No
|
N/A
|
Extended detention basin
|
40-60
|
Yes
|
No
|
1
|
Manufactured treatment device(h)
|
50 or 80
|
No
|
No
|
Dependent upon the device
|
Sand filter(c)
|
80
|
Yes
|
No
|
1
|
Subsurface gravel wetland
|
90
|
No
|
No
|
1
|
Wet pond
|
50-90
|
Yes
|
No
|
N/A
|
Notes to Tables 1, 2, and 3:
| |
(a)
|
Subject to the applicable contributory drainage area limitation specified at Subsection D(15)(b);
|
(b)
|
Designed to infiltrate into the subsoil;
|
(c)
|
Designed with underdrains;
|
(d)
|
Designed to maintain at least a ten-foot-wide area of native
vegetation along at least 50% of the shoreline and to include a stormwater
runoff retention component designed to capture stormwater runoff for
beneficial reuse, such as irrigation;
|
(e)
|
Designed with a slope of less than 2%;
|
(f)
|
Designed with a slope of equal to or greater than 2%;
|
(g)
|
Manufactured treatment devices that meet the definition of "green infrastructure" at Subsection B;
|
(h)
|
Manufactured treatment devices that do not meet the definition of "green infrastructure" at Subsection B.
|
Best Management Practice
|
Maximum Contributory Drainage Area
|
---|---|
Dry well
|
1 acre
|
Manufactured treatment device
|
2.5 acres
|
Pervious pavement systems
|
Area of additional inflow cannot exceed three times the area
occupied by the BMP
|
Small-scale bioretention systems
|
2.5 acres
|
Small-scale infiltration basin
|
2.5 acres
|
Small-scale sand filter
|
2.5 acres
|
Table 4
Water Quality Design Storm Distribution
| |||||
---|---|---|---|---|---|
Time
(minutes)
|
Cumulative Rainfall
(inches)
|
Time
(minutes)
|
Cumulative Rainfall
(inches)
|
Time
(minutes)
|
Cumulative Rainfall
(inches)
|
1
|
0.00166
|
41
|
0.1728
|
81
|
1.0906
|
2
|
0.00332
|
42
|
0.1796
|
82
|
1.0972
|
3
|
0.00498
|
43
|
0.1864
|
83
|
1.1038
|
4
|
0.00664
|
44
|
0.1932
|
84
|
1.1104
|
5
|
0.00830
|
45
|
0.2000
|
85
|
1.1170
|
6
|
0.00996
|
46
|
0.2117
|
86
|
1.1236
|
7
|
0.01162
|
47
|
0.2233
|
87
|
1.1302
|
8
|
0.01328
|
48
|
0.2350
|
88
|
1.1368
|
9
|
0.01494
|
49
|
0.2466
|
89
|
1.1434
|
10
|
0.01660
|
50
|
0.2583
|
90
|
1.1500
|
11
|
0.01828
|
51
|
0.2783
|
91
|
1.1550
|
12
|
0.01996
|
52
|
0.2983
|
92
|
1.1600
|
13
|
0.02164
|
53
|
0.3183
|
93
|
1.1650
|
14
|
0.02332
|
54
|
0.3383
|
94
|
1.1700
|
15
|
0.02500
|
55
|
0.3583
|
95
|
1.1750
|
16
|
0.03000
|
56
|
0.4116
|
96
|
1.1800
|
17
|
0.03500
|
57
|
0.4650
|
97
|
1.1850
|
18
|
0.04000
|
58
|
0.5183
|
98
|
1.1900
|
19
|
0.04500
|
59
|
0.5717
|
99
|
1.1950
|
20
|
0.05000
|
60
|
0.6250
|
100
|
1.2000
|
21
|
0.05500
|
61
|
0.6783
|
101
|
1.2050
|
22
|
0.06000
|
62
|
0.7317
|
102
|
1.2100
|
23
|
0.06500
|
63
|
0.7850
|
103
|
1.2150
|
24
|
0.07000
|
64
|
0.8384
|
104
|
1.2200
|
25
|
0.07500
|
65
|
0.8917
|
105
|
1.2250
|
26
|
0.08000
|
66
|
0.9117
|
106
|
1.2267
|
27
|
0.08500
|
67
|
0.9317
|
107
|
1.2284
|
28
|
0.09000
|
68
|
0.9517
|
108
|
1.2300
|
29
|
0.09500
|
69
|
0.9717
|
109
|
1.2317
|
30
|
0.10000
|
70
|
0.9917
|
110
|
1.2334
|
31
|
0.10660
|
71
|
1.0034
|
111
|
1.2351
|
32
|
0.11320
|
72
|
1.0150
|
112
|
1.2367
|
33
|
0.11980
|
73
|
1.0267
|
113
|
1.2384
|
34
|
0.12640
|
74
|
1.0383
|
114
|
1.2400
|
35
|
0.13300
|
75
|
1.0500
|
115
|
1.2417
|
36
|
0.13960
|
76
|
1.0568
|
116
|
1.2434
|
37
|
0.14620
|
77
|
1.0636
|
117
|
1.2450
|
38
|
0.15280
|
78
|
1.0704
|
118
|
1.2467
|
39
|
0.15940
|
79
|
1.0772
|
119
|
1.2483
|
40
|
0.16600
|
80
|
1.0840
|
120
|
1.2500
|
R = A + B - (A x B)/100
|
Where:
| ||
R
|
=
|
Total TSS percent load removal from application of both BMPs
|
A
|
=
|
The TSS percent removal rate applicable to the first BMP
|
B
|
=
|
The TSS percent removal rate applicable to the second BMP
|
Local Street
|
Minor Collector
|
Major Collector
|
Arterial
| ||
---|---|---|---|---|---|
Design speed (mph)
|
35
|
50
|
60
|
70
| |
Maximum degree of curve
|
16º
|
7.5º
|
5º
|
3.5º
| |
Minimum stopping sight distance (feet)
|
240
|
350
|
475
|
600
| |
Minimum center line grade
|
0.5%
|
0.5%
|
0.5%
|
0.5%
| |
Maximum center line grade
|
8.0%
|
8.0%
|
4.0%
|
4.0%
|
ROW Width1
(feet)
|
Traffic No.
|
Lanes Width
(feet)
|
Shoulder Width Within Gutters
(feet)
|
Width Outside Cartway on Each
Side2
(feet)
|
Width of Cartway1 (feet)
| |
---|---|---|---|---|---|---|
Arterial
|
66
|
2
|
13
|
103
|
10
|
464
|
Major collector
|
60
|
2
|
12
|
83
|
10
|
404
|
Minor collector
|
54
|
2
|
12
|
55
|
10
|
344
|
Local3
|
50
|
2
|
15
|
None
|
10
|
306
|
NOTES:
| ||||||
---|---|---|---|---|---|---|
1Right-of-way
width and/or width of cartway may be required to be more within and
approaching intersections.
| ||||||
2Shall
be grass stabilized topsoil, minimum four inches thick, unless otherwise
specifically approved by the Township Planning Board or Zoning Board
of Adjustment, as the case may be.
| ||||||
3Shoulder
area shall be paved.
| ||||||
4No on-street
parking permitted.
| ||||||
5Shoulder
areas shall not be paved except as required by the Planning Board
or Zoning Board of Adjustment, as the case may be, for proper surface
water drainage, intersection traffic movements and road geometry through
curves. When not required to be paved, the shoulder area, or portion(s)
thereof, shall be approved by the Township Planning Board or Zoning
Board of Adjustment, as the case may be, to remain in its natural
vegetative state, be cleared for sight distance safety purposes, be
improved for drainage purposes and/or be cleared, graded and appropriately
stabilized with an all-weather surface for traffic movements and the
parking of disabled vehicles.
| ||||||
6On-street
parking permitted.
|
Avis Mill Road
| |
Cedar Lane
| |
Cemetery Road
| |
County Home Road
| |
Davis Road
| |
East Lake Road (between East Millbrook Road and Woodstown-Alloway
Road)
| |
Featherbed Lane
| |
Fox Road
| |
Harrisonville Lake Road
| |
Layton Road
| |
Lincoln Road
| |
Old Salem Road
| |
Pierson Road
| |
Robbins Road
| |
Sharptown-Auburn Road
| |
Stewart Road
| |
Williams Road
| |
Mannington-Yorktown Road
|
Commissioners Pike (County Route No. 581)
| |
Auburn Road (County Route No. 602)
| |
Woodstown-Alloway Road (County Route No. 603)
| |
Woodstown-Swedesboro Road (County Route No. 605)
| |
Alloway-Daretown Road (County Route No. 614)
| |
Woodstown-Daretown Road (County Route No. 615)
| |
Bailey Street (County Route No. 616)
| |
Woodstown-Harrisonville Road (County Route No. 617)
| |
Woodstown-Whig Lane Road (County Route No. 619)
| |
King's Highway (County Route No. 620)
| |
Marlton Road (County Route No. 636)
| |
Pointers-Auburn Road (County Route No. 646)
| |
Point Airy Road (County Route No. 660)
| |
Eldridges Hill-Whig Lane Road (County Route No. 660)
| |
Woodstown-Yorktown Road (County Route No. 672)
| |
East Millbrook Road
| |
East Lake Road (between East Millbrook Road and Eldridges Hill-Whig
Lane Road)
|
Harding Highway (U.S. Route 40)
| |
Woodstown-Salem Road (State Route 45)
|