Article VI Engineering Details

All plats shall contain an appropriate legend on each sheet identifying the specialized markings utilized on that sheet.

[Added 8-1-2006 by Ord. No. 13-28-2006]

On all plats, the designation of tax block and tax lot shall appear with the tax block designation shown first and the tax lot designation following.

[Added 8-1-2006 by Ord. No. 13-28-2006]

Plat requirements.

Minor subdivisions. The plat for a minor subdivision shall include the following:

Key map showing the subdivision site and its relation to the surrounding area, streets, and highways and zone district boundaries and identifying the area streets by name. The key map shall be presented at a graphic scale equal to the Kingwood Township Tax Map or Official Map and shall show the following information in a clear and legible form:

[Amended 8-1-2006 by Ord. No. 13-28-2006]

The relationship of the property to the primary and secondary highway system and main intersections;

Boundary lines, building zone districts, special districts and municipal areas;

Map match lines as needed when there are two or more drawings to show the complete subdivision;

The plat area being submitted for approval shall be shaded if it is only one section of the entire subdivision;

[5]

Subdivision boundary line (heavy solid line) and survey data;

[6]

Boundaries of adjacent properties and property owners' names; and

[7]

Subdivision streets and blocks to scale.

Boundary survey data or Tax Map data or some other similarly accurate base.

Topographic survey conditions of property and surrounding area within 200 feet, except that within a developed area only, structures on the adjoining lots need be shown.

Existing and proposed drainage features of property and surrounding area within 200 feet (e.g., culverts, marshes, water areas, streams and lands subject to occasional flooding).

Special site conditions (e.g., easements, power lines and structures).

The location of that portion which is to be subdivided in relation to the entire tract.

Tax sheet, block and lot number, if any.

(h)

The name of the owner and all adjoining property owners as disclosed by the most recent municipal tax records.

(i)

All existing and proposed streets or roads within or adjoining the proposed subdivision, with the right-of-way widths clearly indicated.

(j)

All proposed lot lines and lot lines to be eliminated by the proposed subdivision shall be clearly indicated.

(k)

All existing, proposed and required setback dimensions.

(l)

Scale of the plat and North arrow with reference meridian.

[Amended 8-1-2006 by Ord. No. 13-28-2006]

(m)

Acreage of the entire tract and the area being subdivided.

(n)

Name and address of owner, subdivider and person preparing plat.

(o)

Documentation of feasibility of an adequate method of sewage disposal.

(p)

A narrative explaining the application.

(q)

Except for mergers or boundary adjustments not creating any new lot, the location and results of soil profile pits and/or borings and permeability tests for each lot, including the remaining lands, conducted in accordance with N.J.A.C. 7:9A-1 et seq., Standards for Individual Subsurface Sewage Disposal Systems, as amended or such regulations as may subsequently be substituted for or intended to replace said regulations, and any requirements of the Kingwood Township Board of Health. The location and results of all such tests attempted shall be shown on the plat. All such tests shall be conducted under the supervision of a licensed professional engineer of the State of New Jersey and witnessed by a duly appointed official of the Township of Kingwood. The applicant's or owner's engineer shall certify on said plat that the tests in question conform to the requirements of N.J.S.A. 7:9A-1 et seq. for the construction of an individual subsurface disposal system.

[Added 12-15-1986 by Ord. No. 5-7-86; amended 10-19-1987 by Ord. No. 5-9-87; 9-17-1990 by Ord. No. 7-15-90; 9-5-2006 by Ord. No. 13-31-2006]

(r)

Steep slope analysis as set forth in § 114-3.

[Added 7-19-1999 by Ord. No. 10-10-99; amended 6-5-2007 by Ord. No. 14-12-2007]

Major subdivisions. The plat for a major subdivision shall include:

All the data required for a minor subdivision plat.

Contours at an interval of two feet based on United States Geological Survey datum for the property to be subdivided and the surrounding area within 200 feet unless otherwise approved by the Township Engineer.

Relationship to the comprehensive plan for the area.

Proposed street, block and lot layout with reference to surrounding properties and street pattern.

Plat for preliminary approval, improvement and utility plans and plat for final approval common requirements. In addition to the requirements hereafter set forth, the plats and improvement and utility plans shall conform to the following:

The drawing shall be prepared by a professional engineer licensed to practice in New Jersey, except as follows:

The boundary survey and the plat for final approval shall be prepared by a land surveyor licensed to practice in New Jersey.

Architectural drawings shall be prepared by an architect licensed to practice in New Jersey.

Landscape drawings, except street tree locations and types, shall be prepared by a practicing landscape architect or qualified landscape designer.

Title block shall include the following information:

Name of the subdivision.

Name, address, membership or license of the professional person who prepared the drawings.

The term "plat" or "improvement and utility plans," whichever is applicable.

Date of the drawing.

Drawing reference number.

Section number of the section being subdivided, if applicable.

Scale of the drawing.

Drawing shall also include the following:

North arrow and reference meridian.

Date of original drawing and date and nature of all subsequent revisions.

The title sheet or plat for final approval shall show the following additional data:

Total acreage of the entire tract.

Total acreage of the section being subdivided, if applicable.

Total acreage of each zone district boundary within the tract.

Total number of proposed lots for the entire tract and for the section being subdivided.

In addition to the key map, there shall be a location map showing the subdivision site and its relation to the surrounding area, streets, and highways and zone district boundaries and identifying the area streets by name. The location map shall be presented at a graphic scale equal to the Kingwood Township Tax Map or Official Map and shall show the following information in a clear and legible form:

[Amended 8-1-2006 by Ord. No. 13-28-2006]

Relationship to the primary and secondary highway system and main intersections.

Boundary lines, building zone districts, special districts and municipal areas.

Subdivision streets and blocks to scale.

Map match lines as needed when there are two or more drawings to show the complete subdivision.

The plat area being submitted for approval shall be shaded if it is only one section of entire subdivision.

Subdivision boundary line (heavy solid line) and survey data.

Boundaries of adjacent properties and property owners' names, provided that adjacent properties which are a part of a recorded subdivision plat may be identified by the subdivision name.

Plat data for preliminary approval. The plat shall contain the following additional data:

Survey data.

The plat shall be based on a boundary survey which shall be based on a field traverse having an error of closure of not less than one part in 10,000 parts.

Topographic contours at two-foot intervals referred to the United States Coast and Geodetic Survey datum of mean sea level, provided that smaller or larger intervals, when advisable due to the terrain, may be used after approval by the Township Engineer. The contours shall extend 200 feet beyond the subdivision boundary line.

Existing site conditions to be indicated.

Street rights-of-way on subdivision and within 500 feet of its boundaries.

Name.

Location and width.

Center-line elevations shown on a profile with elevation indicated at fifty-foot interval.

Typical cross section.

Other rights-of-way and easements on the subdivision and within 500 feet of its boundaries.

Identification and description.

Location and width.

Restrictions of use, if any.

Drainage structures on the subdivision and within 500 feet of its boundaries to be shown on plan and profile.

Type of structure.

Location, invert elevations, gradients and sizes of all pipe and all other structures where applicable.

Capacity of all storm drainage facilities.

Location, size and capacity of other utility structures, such as water and gas mains and power lines, on the subdivision and within 500 feet of its boundaries.

Marshes, ponds, streams and land subject to periodic or occasional flooding or similar conditions on the subdivision and within 500 feet of its boundaries.

Location and area covered, indicating apparent high-water level.

Water level on date of survey and survey date.

Maximum depth of water at critical points.

Capacity of all streams.

Test holes.

Test holes shall be dug at a rate of one test hole and two percolation tests per lot of land to be subdivided. Test holes shall be dug to a depth of 12 feet or bedrock, whichever is less, for the purpose of determining bedrock elevations, soil horizons and groundwater depth. The percolation test shall be dug and tested in accordance with Chapter 199.

The location of each test hole shall be shown on the plat with a graphical representation of the depth to bedrock, soil horizons and groundwater, including elevations of bedrock and groundwater.

Township or other public lands, including lands designated as parks, open spaces or for some other public use.

(h)

Buildings and other structures located on the subdivision and within 200 feet of its boundaries.

(i)

Trees over four inches in diameter measured at six feet above existing grade. Where trees are in mass, only the limits thereof need to be shown.

Proposed site conditions to be indicated.

Streets.

Name (to be checked with the Township Engineer prior to submission).

Right-of-way width.

Tentative center-line elevations at fifty-foot intervals shown on the profile sheet.

Tentative center-line gradient shown in percent of grade.

[5]

Tentative cross sections.

Lot layout.

Lot lines and dimensions to the nearest foot and lot area in square feet.

Building setback lines (dashed) and its dimensions from the lot line.

Easements and restricted areas with notation as to purpose or restriction.

Identification of lots or parcels for special uses, whether they are to be offered for dedication or not.

[5]

Future layout for all reserved parcels, in broken lines, in conformance with existing zoning regulations.

[6]

High points and low points shown on plan and profiles with elevation thereof shown on profiles.

[7]

An analysis of allowable site distance at all intersections and an indication thereof on the profile and plan.

[8]

Location of the site triangles as required by municipal and county requirements.

Preliminary stormwater drainage system in plan and profile.

All proposed drainage facilities with sizes and gradients in plan and profile.

Outline of watersheds tributary to drainage structures and their approximate area in acres, including those which extend beyond the boundaries of the subdivision.

Preliminary drainage design computations.

Existing trees to remain standing should be shown. If trees are part of a mass, the percentage of trees to be removed shall be shown.

Proposed sanitary sewer system in plan and profile.

All proposed sanitary sewers with sizes and gradients.

All proposed pumping stations, force mains and other special facilities.

An engineer's report in compliance with the requirements of the New Jersey Department of Environmental Protection.

The tentative location and size of all other proposed utilities.

The estimated average number of automobiles and number and size or type of trucks or buses that will enter and leave the site each day and during peak hours.

(h)

Proposed tentative grading plan, indicated by contours at four-foot intervals or other intervals as may be required by the slope and nature of the final grading.

(i)

The limits of the plat sections if the subdivision is to be developed in more than one section, and the anticipated date of development on each section.

(j)

Impact on community services.

An analysis of the impact of the proposed subdivision on community services, including but not necessarily limited to the following:

[a]

Sanitary sewer system. (If septic systems are to be used, their effect on groundwater shall be analyzed in a report by a geologist or other qualified professional in the field.

[b]

Storm drainage system.

[c]

Street and highway system.

[d]

Schools.

[e]

Police and fire services.

[f]

Recreation facilities.

[g]

Public utilities, such as water, telephone, electric and cable television.

[h]

Other such services as the Planning Board may deem appropriate.

The analysis shall assess the impact of the subdivision in its entirety and by section and shall compare them to the available capacity. It shall also include the basis for each projection.

For the purposes of Subsection D(3)(j)[1][g] above, a letter from the public utilities stating their ability to accept the additional required services may be considered compliance with this article.

(k)

Any other data the Planning Board may deem appropriate.

Improvement and utility plans. The improvement and utility plans shall contain the following additional data:

All existing site conditions as required in Subsection D(2) above.

Street rights-of-way and widenings of street rights-of-way.

Name.

Location.

Width.

Notation on widenings where an offer of dedication is being made.

Other rights-of-way and easements.

Identification and description.

Location and width, with dimensions necessary for description.

Restrictions of use, if any.

Proposed lot layouts.

Number identification by a lot and block system as assigned by the Township Tax Assessor.

Lot lines with accurate dimensions to the nearest hundredth of a foot.

Lot area to the nearest square foot.

Building setback lines with dimensions.

Special parcels.

Description of proposed action and use, including a note where an offer of dedication is being made.

Boundary lines with accurate dimensions to the nearest hundredth of a foot.

Street center-line gradients in percent indicated with arrows to establish the direction of water flow and high and low point locations.

Street center-line grade elevations at fifty-foot intervals determined to 1/100 of a foot.

Drainage system requirements.

Complete drainage system plan for the entire subdivision, with appropriate development stages for each of the plat sections, shall be shown graphically, with all existing drainage features which are to be incorporated properly identified as "existing."

Boundaries of stormwater runoff watersheds for each drainage structure and their area in acres.

All proposed surface drainage structures (e.g., ditches, channels, etc.).

All appropriate details and dimensions necessary to explain clearly the proposed construction, including type of construction, material, size, pitch and invert elevations among other things, in accordance with good engineering practice.

Profiles of all proposed drainage system components.

Final design computations.

(8)

Sanitary waste disposal system (if applicable).

A sanitary sewer system design shall be indicated in all cases where public sewer connections exist or are proposed.

A notation on the profile of the minimum water and air retention time for exfiltration tests for each line within the subdivision.

Typical lot layout, indicating location of system with reference to house and water supply, and detailed drawing of proposed sanitary waste disposal unit.

When percolation tests are taken, they shall be shown on the plat with rates.

(9)

Water supply and distribution.

Location of source, its pressure, quantity and size of the supply main.

Location and size of all distribution mains.

Location of fire hydrants.

Location of all control valves.

(10)

Electric and telephone and other utility systems.

Location of all service routes for both aerial and underground cables and of all poles.

Location of all special facilities.

Typical cross section of buried cable.

(11)

All off-tract improvements to be constructed as part of the subdivision shall be detailed as above.

(12)

A contour grading plan for all areas to be distributed, showing both existing and proposed grade at two-foot intervals and smaller intervals if necessary.

(13)

Locations of all trees and natural features to be removed or preserved.

(14)

Location of all improvements, including but not limited to the following:

Curbs and gutters.

Sidewalks.

Driveway aprons and drop curbs.

Street signs.

Streetlighting.

Street and shade trees.

(15)

Profile drawing requirements.

Drawings shall be made on standard profile paper at the following scales:

Horizontal scale, one inch equals 50 feet.

Vertical scale, one inch equals five feet.

All profiles shall show the existing natural grades, the typical cross section of existing or proposed roadways, the center lines of intersecting roadways and a system of survey stations.

The center-line profile of all proposed roadways with dimensioning on vertical curves, and notation as to gradient elevations at fifty-foot stations and at all high and low points.

The invert profile and location of all drainage structures in street rights-of-way and in drainage easements.

(16)

Detailed grading plans of each intersection, showing elevations at ten-foot intervals at the following points:

Center lines for 200 feet either side of center line at intersections.

Edge of traveled way of through street.

Gutters of both through street and intersecting street.

(17)

An estimate of quantities of each construction item broken down into the following categories:

Improvements dedicated to the municipality or, in the case of privately owned streets, improvements which would normally be dedicated to the municipality.

Improvements owned by public utilities.

Other site improvements, exclusive of dwellings, septic systems and private wells.

Improvements to be made off-tract.

(18)

Copies of all applications and supporting data for permits issued by other agencies and copies of the permits.

(19)

Construction details of all improvements other than public utilities.

(20)

Other data as may be required by the Planning Board.

Plat for final approval. Plat must be drawn up in conformance with the provisions of the Map Filing Law and contain all the requirements for drainage easements, encroachment line sight triangles at intersections and new or additional rights-of-way easements.

§ 115-10 Subdivision design standards.

Purpose. These design standards are a guide to development so that Kingwood Township will in the future be a coordinated, well-planned community of good quality, with provision for desirable services and circulation facilities.

Land use standards.

Proposed land uses shall conform to the Zoning Ordinance of the Township of Kingwood,[1] the Master Plan, the Official Map and the provisions of this chapter.

Editor's Note: See Ch. 132, Zoning.

Subdivision designs shall indicate consideration for suitable protection of different types of land uses and the segregation of vehicular and pedestrian traffic incompatible with particular uses.

Desirable sites shall be provided for public and semipublic land uses, such as schools, firehouses, recreation sites and other community uses as provided in N.J.S.A. 40:55D-44.

Street and highway standards.

The street and highway layout shall conform to the Master Plan and the Official Map and shall provide appropriately located street taps or stub streets to adjacent areas.

Where a higher level of government requires a wider street, that standard shall be met. Otherwise, the following shall be minimum widths:

Street Class	Right-of-way (feet)	Maximum Average Daily Traffic Volume
Collectors, major	80	Above 8,000
Collectors, minor	60	800 to 8,000
Locals	50	Less than 800
Alleys	Not permitted

The street pattern within a subdivision shall be orderly and harmonious with the surrounding area.

Local streets shall be laid out so that their use for through traffic will be discouraged. Particular attention should be given to eliminating possible bypasses around traffic signals and major intersections.

Block dimensions.

Maximum length shall be 2,000 feet.

Minimum width shall relate to the zoning district requirements for lot sizes and yards and generally shall provide for two tiers of lots.

Special attention shall be given to blocks in industrial and business districts to provide for access to the lots and for parking and truck delivery.

Culs-de-sac.

Maximum length shall be 1,500 feet or adequate to accommodate 25 lots, whichever is less.

Minimum radius for the right-of-way at the turnaround shall be 60 feet, and the outside curb radius shall be 50 feet.

Culs-de-sac shall be placed at the end of all stub or otherwise dead-end streets, whether or not street is to be extended as part of a future subdivision or section thereof.

Where a cul-de-sac is of a temporary nature, provision shall be made for future extensions of the street and reversion of the excess right-of-way to the adjoining properties.

Intersections.

No more than two streets shall intersect or meet at any one point.

No street shall intersect or meet at an angle of less than 75° nor more than 105° (90° is preferred).

The center lines of all streets entering an intersection shall pass through a single point.

Intersections on local and minor collector streets shall be spaced a minimum of 150 feet apart measured from the points of intersection of the center lines.

Intersections on other than local and minor collector streets shall be spaced a minimum of 800 feet apart measured from the points of intersection of the center lines.

Preservation of natural environment.

Subdivision design shall preserve, if possible, the natural terrain and natural drainage lines.

A conscious effort shall be made to preserve all worth-while trees and shrubs which exist on a site. Such features may well be suggested for park or playground areas. On individual lots or parcels, care shall be taken to preserve selected trees to enhance the landscape treatment of the development.

Natural fertility of the soil shall be preserved by disturbing it as little as possible.

Open watercourses shall be recognized as community assets. Subdivision design may well be enhanced by featuring streams and brooks.

No topsoil shall be removed from the site or used as spoil. Topsoil moved during the course of construction shall be redistributed so as to provide at least six inches of cover to all areas of the subdivision and shall be stabilized by seeding or planting.

Additional standards.

Where the property to be subdivided is next to or includes a railroad right-of-way, suitable provisions shall be made for such things as road crossings, screening and freight access in recognition of the relationship between the railroad and the subdivision.

Land subject to periodic or occasional flooding shall not be platted for residential occupancy nor for any other use which may endanger life or property or aggravate a flood hazard.

No subdivision showing reserved strips controlling access to streets shall be approved except where the control and disposal of land comprising such strips has been placed in the Township Committee.

Subdivisions that adjoin or include existing streets that do not conform to widths as shown on the Master Plan or Official Map or the street width requirements of this chapter shall dedicate additional width along either one or both sides of the street. If the subdivision is along one side only, 1/2 of the required extra width shall be required to be dedicated.

Utility services.

Standards and procedure.

All gas and water mains and all streetlights and lighting standards shall be installed in accordance with the specifications of the lighting agency, utility company or governmental authority or district which has jurisdiction in the area.

Electric light and telephone wires and all other utilities shall be underground.

A letter approving such a proposed installation, and a statement as to who will carry out the construction, signed by a responsible official of the utility agency, utility company or governmental authority or district which has jurisdiction in the area, shall be directed to the administrative office and shall be received prior to the improvement and utility plans.

Every proposed lot shall be served by public water and sewer or alternates capable of meeting all local, county and state standards. The securing of necessary permits, approvals and/or clearances shall be the responsibility of the applicant.

Street names.

General rules for street names; definition of streets.

PLACE — A street one block long, or a connecting link between two longer streets and not otherwise a segment of their alignment.

COURT, CRESCENT or TERRACE — A loop street which begins and ends on the same street and is not otherwise connected with other streets or a cul-de-sac.

LANE, PATH, STREET or WAY — Short minor residential streets which do not serve as secondary highways or major streets.

AVENUE, BOULEVARD, DRIVE or ROAD — A collector or arterial street.

Continuation of street names. All existing street names shall be extended where proposed streets follow along their alignment.

Historic or traditional street names. Such names shall be preserved even through the actual street alignment has been changed or the name does not agree with the provisions of this section.

Duplication of street names. There shall be no duplicate street names within the Township.

The developer shall consult with the Kingwood Township Historical Society in an effort to agree upon a name for the street(s) within the subdivision. If the developer and the Kingwood Township Historical Society are able to agree upon a name for the street, that name shall be recommended for adoption by the Kingwood Township Committee. In the event that the developer and the Kingwood Township Historical Society are unable to agree upon a name, both the developer and the Kingwood Township Historical Society shall submit a proposed name for the street to the Kingwood Township Committee. The Kingwood Township Committee may then select and approve one of the two names submitted as the name for the street. The Kingwood Township Committee shall retain the sole and exclusive right to name any street within the Township.

[Added 11-18-1996 by Ord. No. 9-13-96; amended 10-1-2015 by Ord. No. 18-11-2015]

§ 115-11 Improvement design standards.

The following improvements will be required except where this chapter specifically waives the requirement or when the Planning Board waives the requirement by specific resolution in conjunction with hardship, peculiar situations or special development provisions such as a cluster single-family development:

Paved streets.

Curbs and gutters.

Sidewalks (high density and planned development).

Water mains and fire hydrants (where served by public water supply).

Sanitary waste disposal.

Storm drainage.

Street signs.

Streetlighting.

Street and shade trees.

Street design standards. The following minimum standards shall be required for all streets other than county or state roads and highways constructed in Kingwood Township:

Horizontal alignment shall have:

	Collector, Major (feet)	Collector, Minor (feet)	Local (feet)
Minimum center-line radius	600	500	300
Minimum tangent between reverse curves	200	160	120
Intersection radius (curb returns)	40	30	25
Minimum intersection radius shall be determined by highest street class in intersection; right-of-way line shall be concentric thereto

Vertical alignment shall have:

Minimum grade of 0.5%.

Maximum grade of 6.0% (8.0% on local streets), or

Maximum grade for less than 200 feet of 10.0%, and

Maximum grade within 100 feet of a right-of-way intersection of 4.0%.

All changes in grade shall be connected by vertical curves.

The length (L) in feet of a vertical curve shall be related to the algebraic difference in the percent of grade (A) and a constant according to the following formula: L = KA. The minimum "K" values shall be as follows:

Street Class	Crest Curve (feet)	Sag Curve (feet)
Collector, major	145	100
Collector, minor	65	60
Local	28	35
Intersections (stop conditions)	3	3

Stopping sight distances shall be at least:

Collectors, major: 350 feet.

Collectors, minor: 275 feet.

Local: 200 feet.

Street pattern shall conform to the provisions of § 115-10C.

In regulating subdivisions, these provisions shall be considered the minimum requirements generally consistent with the public welfare, and the Planning Board in consultation with the Township Engineer shall modify or extend these provisions in appropriate cases as may be deemed necessary for the public good. Modifications to these standards shall be based on: A Policy on Design of Urban Highways and Arterial Streets, latest edition, published by the American Association of State Highway Officials, or other acceptable reference.

Standards for all other roads shall be determined by appropriate authorities.

Required curbing and construction types for street improvements. Curbing and construction types for street improvements shall be in accordance with the following requirements:

Pavement construction shall conform to Chapter 112, Streets and Sidewalks, Article I, Road Specifications.

Curb construction shall conform to the New Jersey Department of Transportation standards.

These provisions shall be considered minimum requirements generally consistent with the public welfare, and the Township Engineer shall modify or extend these provisions in appropriate cases as may be deemed necessary for the public good.

General street improvements.

Driveway aprons.

All driveways or other parking areas shall have driveway aprons extending from the curbline to the front property line.

Driveway aprons shall be of concrete, have a six-inch thickness and shall have widths as follows:

Residential	Minimum (feet)	Maximum (feet)
Single driveway	8	20
Double driveway	16	20
Other uses	25	40

Sidewalks.

All sidewalks shall be four inches thick and at least four feet wide, constructed of one course of portland concrete, except that a sidewalk forming part of a driveway apron shall be six inches thick, at grade with abutting sidewalks, and of the same construction material as abutting sidewalks.

All sidewalks shall be located one foot within the street right-of-way.

Street signs. Street signs shall be provided by the subdivider conforming to current Township standards.

Street trees.

Street trees shall be provided in all subdivisions.

Trees shall be of nursery stock of an approved species grown under the same climatic conditions as at the location of the development. They shall be of symmetrical growth, free of insect pests and disease, suitable for street use and durable.

The average trunk diameter measured at a height of six feet above the finished grade level shall be a minimum of two to three inches, depending on good practice with reference to the particular species to be planted.

Trees shall be planted at intervals of from 40 to 60 feet apart (depending upon the species) along both sides of the street and at least 15 feet from any sidewalk, curb, gutter or other right-of-way improvement as provided for in this regulation, whether such improvement is proposed to be built or not.

All planting shall be done in conformance with good nursery and landscape practice.

Planting strips. All planting strips within street rights-of-way shall be finish graded, properly prepared and seeded or sodded with lawn grass in conformance with good nursery and landscape practice.

Shade trees.

Shade trees shall be provided in all subdivisions.

The average trunk diameter measured at the height of six feet above the finished grade level shall be a minimum of one to two inches, depending on good practice with reference to the particular species to be planted.

Monuments shall be provided as described in the Map Filing Law.[1]

Editor's Note: See N.J.S.A. 46:26b-1 et seq.

Utility installations.

Sanitary sewers.

Sanitary sewers shall be designed in accordance with the current regulations of the New Jersey Department of Environmental Protection and the current construction standards of the Township of Kingwood.

All sanitary sewers shall meet the exfiltration standards of the Township.

Water mains and fire hydrants.

Water mains shall meet the requirements of the water operating utility except as provided below.

Subdivisions not served by public water shall provide installation of sleeves and whatever else is necessary to prevent opening of the street at such time as water lines are installed.

Subdivisions served by semipublic or private water companies shall have a minimum main size of eight inches in diameter, except dead-end lines, which may be six inches in diameter.

Fire hydrants shall be located as follows:

Within 600 feet of all structures.

At the end of all dead-end lines.

Streetlighting shall be guided by the following minimum requirements:

Street Class	Minimum Average Maintained Footcandles	Uniformity (average to minimum)
Collectors, major	0.5	6:1
Collectors, minor	0.3	—
Local	0.2	—

Other utilities shall be designed to meet the requirements of the operating utility, but shall be designed to be serviced for repair or additional installation without disruption to streets.

Drainage system design standards.

Grading and drainage system plan.

A preliminary grading and drainage system plan shall be a part of the preliminary plat. It shall indicate in general terms a proposal for an adequate system of drainage structures to carry off and store or discharge the stormwater runoff and natural drainage water which originates not only within the property boundaries but also beyond the property boundaries. It should perpetuate existing drainage patterns.

The public improvement and utilities plan and profiles shall show the final drainage plan, site grading and street profiles.

No stormwater runoff or natural water shall be so diverted as to overload existing drainage systems or create flooding or the need for additional drainage structures on other private properties or public lands without proper and approved provisions being made for taking care of these conditions. Watersheds with drainage areas over 1/2 square mile come under the jurisdiction of the New Jersey Department of Environmental Protection. Approval of this agency must be secured for any culvert or bridge crossing falling into this category. Copies of any correspondence with the Department of Environmental Protection shall be supplied to the Township Engineer.

The stormwater management plan required under § 115-6.2 shall be submitted under the seal of a licensed professional engineer and shall show, among other things, all existing and proposed natural and artificial drainage courses and other features for the control of drainage, erosion and water generally; the calculated volume of water runoff from the slopes and from the lot in question, as improved; the existence of all natural and artificial drainage courses and facilities within 500 feet of the lot which are or will be used to carry or contain the runoff from the slope and the lot; and the effect of any increased water runoff on all adjacent properties and any other property which will be materially affected by increased water runoff.

[Added 7-19-1999 by Ord. No. 10-10-99]

Collection system.

The quantities of water for which collection system shall be designed shall be in accordance with the rational method of design using the formula: Q = CIA.

Where "Q" is the required capacity in cubic feet per second for the collection system at the point of design.

"A" is the tributary drainage area in acres and shall include areas tributary from outside sources as well as from within the site itself.

"C" is the coefficient of runoff applicable to the drainage area and shall be based on consideration of soil conditions, average slope of the drainage area and degree of ultimate development of the area, but in no case be less than the following coefficients:

			Topography
Usage		Density (Units/Acre)	Flat 0%-10%	Rolling 10%-20%	Hilly Over 20%
Residential
	High density	4-6	0.50(0.40)	0.55(0.45)	0.60(0.55)
	Medium density	1-4	0.45(0.35)	0.50(0.40)	0.55(0.55)
	Low density	Less than 1	0.40(0.30)	0.45(0.35)	0.50(0.45)
Impervious surfaces
	Undeveloped woodland		0.30(0.20)	0.35(0.25)	0.50(0.45)
	Pasture and grassed areas	0.30(0.20)	0.36(0.20)	0.42(0.37)
	Cultivated fields	0.50(0.50)	0.60(0.50)	0.72(0.62)

The above runoff coefficients assume that clay soils (sand, gravel soils coefficients indicated in parenthesis) are present and that paved areas (parking) have been provided. Any deviation from these factors would result in an adjustment in "C" values. Determination of nonlisted uses shall be subject to special study and approved by the Township Engineer.

"I" is the rainfall intensity in inches per hour and shall be determined from the graph entitled "Rainfall Intensity Duration for Essex and Union Counties," copies of which are on file with the Township Clerk and Engineer and are made a part hereof.

The following intensities shall be used as a guide to determine "Q":

Systems carrying roadway drainage, 10 years.

Crosspipes or culverts carrying runoff from one side of the roadway to the other, 25 years; tributary areas over 20 acres, 50 years.

At low points and cuts from which water cannot escape without overflowing the roadway, 25 years.

Pipes or conduits shall be designed using Manning's equation for velocity:

V equals 1.486 x R 2/3 x S 1/2

"R" is the hydraulic radius of the conduit flowing full.

"n" is Manning's roughness coefficient, which shall be as follows:

Concrete pipe	0.012
Corrugated metal	2 2/3 x 1/2 corrugations
Plain or fully coated	0.024
Paved invert	0.020
Fully paved	0.012
3" x 1" corrugation	0.027
6" x 2" corrugation (field bolted)	0.032

"n" for other materials shall be recommended by the Township Engineer.

"S" is the slope of the energy gradient in feet per foot and shall generally be considered as being the same as the slope of the invert of the pipe (So). However, such slopes shall be checked against the available hydraulic gradient whenever the system flows full or where the system discharges into a body of water.

Velocity.

Wherever possible to ensure a self-cleaning velocity, pipes shall be placed on grades that will provide a minimum velocity of three feet per second when flowing 1/4 full. The following table indicates minimum grades to accomplish this:

Desirable Minimum Gradients for Concrete Pipe
Diameter (inches)	Slope N equals 0.012
15 (minimum permissible)	.008
18	.006
24	.005
30	.004
36	.003
42	.002
48	.0016
54	.0014
60	.0012
66	.0011

Where steep grades are encountered, full-flow velocities over 15 feet per second should be avoided by the use of drop manholes or inlets in the line.

Alignment.

Manholes or inlets shall be provided in drain lines not more than 350 feet apart and wherever branches are connected or sizes are changed and wherever there is a change in alignment or grade.

Alignment of pipes shall be in a straight line between manholes or inlets, except that radius pipe may be used in pipes over 60 inches in diameter, provided a manhole or inlet is incorporated at not more than 500-foot intervals.

Inlet spacing and headwalls.

Inlet spacing shall be such as to permit a spread of water to the edge of the traveled way, edge of shoulder for rural roads or edge of parking lane (eight feet maximum) for urban roads during a storm with an intensity of three inches per hour. Inlet spacing may vary up to 350 feet, depending on the contributory drainage area, the longitudinal and cross slopes of the roadway. Inlets at intersections shall be located to intercept water before it crosses the intersection or crosswalk area. Inlets shall not be placed in the crosswalk area. Pairs of inlets shall be placed at low points.

Inlets intercepting swales or in parking areas shall be designed such that not more than six inches (three inches in parking areas) shall pond over an inlet during a storm with an intensity of three inches per hour.

Pipelines starting or ending in ditches, streams or other bodies of water shall terminate with either a headwall or a flared end section. Riprap or other suitable material shall be provided to prevent erosion.

Open channel flow. Where brooks, ditches, swales or other channel flows are used, they shall be designed by the use of Manning's equation as indicated for collection systems above, with the following considerations:

The friction factor (n) shall be:

Unlined
	Earth uniform section	0.018-0.027
	Earth nonuniform section	0.025-0.040
	Earth not maintained	0.080-0.012
Lined-concrete
	Finished	0.015
	Rough	0.25
	Riprap	0.35

Design velocities should be limited to a nonerosive velocity and shall be determined based on an analysis of the soil conditions, but in any case shall not exceed the following:

Materials	Velocity
Fine sand to fine loam	2.5 to 3.5 fps
Stiff clay to hardpan	3.75 to 6.00 fps
Concrete-lined ditch	15 fps
Velocities shall be controlled by use of check dams or baffles where necessary

A ditch or brook right-of-way of sufficient minimum width, to include a ten-foot access strip in addition to the width of the ditch or brook from bank top to bank top, shall be offered for dedication to the Township for drainage purposes. Such right-of-way shall be shown on the drainage plan and on the final plat.

Swales shall be provided in residential areas so that an area not in excess of the minimum lot area in the subdivision shall drain without being intercepted. This requirement may be varied for wooded sites or pervious soils.

Swales shall be provided in other areas so that not less than one impervious acre shall drain without being intercepted.

Jute mesh slope protection shall be used in swales or grassed ditches on gradients exceeding 3%. Paved ditches shall be used where these gradients exceed 10% and significant discharge is expected.

Side slopes for drainageway shall be as follows:

Facility	Maximum Side Slope
Channel	2:1
Ditch	4:1
Swale	6:1

Minimum cover and structural considerations.

All pipe shall be concrete unless specific unique design considerations exist for the use of other types of materials and then only with the approval of the Township Engineer.

Minimum cover for reinforced concrete pipe shall be based upon a depth of cover of two feet from the top of pavement.

Minimum cover for corrugated metal pipe shall be based upon a depth of cover of one foot from top of pipe to top of pavement or upon manufacturer's recommendations, whichever is greater.

Maximum cover for pipe shall be based on rational analysis through use of Marston's formula. For reference, see the booklet entitled "Reinforced Concrete Pipe Culverts" issued by the United States Department of Commerce and manufacturer's recommendations for flexible pipe.

Standard-strength reinforced concrete pipe shall conform to Class 3, Wall B, and extra-strength reinforced concrete pipe shall conform to Class 4, Wall B, of ASTM Specifications C-76 of AASHO Designation M-170. Strengths for corrugated metal pipe shall be as required by the New Jersey State Highway Department Standard Specifications, current edition, and amendments.

Box culverts shall be designed in accordance with AASHO recommendations.

All inlets shall be in accordance with the New Jersey Department of Transportation Standards and Specifications.

Design criteria not covered herein.

Criteria not incorporated herein necessary for design shall be based on recommendations incorporated in Hydraulic Engineering Series circulars published by the Federal Highway Administration and ASCE publication, current edition, and as approved by the Township Engineer.