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 | 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 | — |
(Notes corresponding to annotations (a) through (g) are found on Table 3.) |
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 | 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% to 90% | Yes | No | N/A |
(Notes corresponding to annotations (b) through (d) are found on Table 3.) |
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 | Stormwater Runoff Quantity | Groundwater Recharge | Minimum Separation from Seasonal High-Water Table (feet) |
Blue roof | 0% | Yes | No | N/A |
Extended detention basin | 40% to 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% to 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 (acres) |
---|---|
Dry well | 1 |
Manufactured treatment device | 2.5 |
Pervious pavement systems | Area of additional inflow cannot exceed 3 times the area occupied by the BMP |
Small-scale bioretention systems | 2.5 |
Small-scale infiltration basin | 2.5 |
Small-scale sand filter | 2.5 |
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. |
Design Speed of the Uncontrolled Street | Minimum Required Sight Distance | |
---|---|---|
25 mph | 250 ft. | |
30 mph | 300 ft. | |
35 mph | 350 ft. | |
40 mph | 400 ft. | |
45 mph | 450 ft. | |
50 mph | 500 ft. |
Angle of Parking Space | One-Way Aisle/ Driveway | Two-Way Aisle/ Driveway | |
---|---|---|---|
90° | Not Permitted | 24 feet | |
60° | 18 feet | Not Permitted | |
45° | 15 feet | Not Permitted | |
30° | 12 feet | Not Permitted | |
Parallel | 12 feet | 20 feet |
Traffic Lanes | ||||||
---|---|---|---|---|---|---|
Roadway Category | R-O-W Width[1] | No. | Width | Shoulder Width in Cartway | Width Outside Cartway[2] | Width of Cartway |
Major Collector[3] | 60' | 2 | 12' each | 7', Not Always Paved[4][5] | 11' Each Side | 38' |
Minor Collector[3] | 54' | 2 | 11' each | 5', Not Always Paved[4][5] | 11' Each Side | 32' |
Rural Local[3] | 50' | 2 | 11' each | 3', Not Always Paved[4][5] | 11' Each Side | 28' |
Neighborhood Local[6] | 50' | 2 | 15' each | Not Applicable | 10' Each Side | 30' |
FOOTNOTES TO PROPOSED ROADWAY DESIGN SPECIFICATIONS | ||
---|---|---|
[1]The right-of-way width and/or cartway width may be required to be wider within and approaching intersections. | ||
[a] | The right-of-way width includes the paved traffic lanes, the shoulders and the land area outside the shoulders where sidewalks, street trees and other such public improvements may be located when required by ordinance. | |
[b] | The cartway width includes the paved traffic lanes and the shoulders, whether or not paved in accordance with Footnote [4] hereinbelow. | |
[2]The area outside the cartway on both sides of the road shall be grass stabilized topsoil at least four inches thick except and in accordance with the following: | ||
[a] | Sidewalks and bike lanes shall be located within this land area as may be required by the Land Use Board. | |
[b] | Street trees and other landscaping shall be planted in this land area also as required by the Land Use Board. | |
[3]No on-street parking is permitted. | ||
[4]Shoulder areas shall not be paved except as may be required by Land Use Board for proper surface water drainage, intersection traffic movements and/or road geometry through curves. | ||
[a] | Where not required to be paved, the shoulder area shall remain in its natural vegetative state; or | |
[b] | Where directed by the Township Engineer, the shoulder area shall 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/or the parking of disabled vehicles. | |
[5]Where required by the Land Use Board, bike lanes at least four feet in width shall be provided adjacent the traffic lanes, within the required shoulder width, and on both sides on the roadway. Such lanes shall be appropriately signed and marked, in accordance with the New Jersey Department of Transportation's "Bicycle Compatible Roadways and Bikeways Planning and Design Guidelines." | ||
[6]Streets within a planned development not otherwise specified on the Traffic Circulation Plan Map shall ordinarily be considered neighborhood local streets, except for the major streets within the development expected by the Land Use Board to carry relatively significant volumes of traffic; such major streets shall meet the standards herein for minor collector streets. | ||
[7]Except in specific instances where a pavement width of 28 feet may be appropriate and parking is permitted only on one side, as approved by the Land Use Board. |