Township of Harrison, NJ Design Standards

Water mains shall be sized for adequate delivery of pressure and volume. In general, the following policies shall be followed in determining the size of water mains:

Lines whose primary function is and will be to serve adjacent property will be six inches.

Lines which serve as feeder lines to several other streets should be eight inches and should be laid out to provide loops with other lines which enclose areas of not more than 1/4 of a square mile.

Lines which provide the main feed from present or future sources of supply or storage shall be 12 inches or larger and shall be laid out so as to form loops with other lines which enclose not more than one square mile.

Lines whose only purpose is to serve abetting properties and to which there is no fire hydrant connected and which do not serve more than four residences may be four inches if specifically approved by the Township Engineer.

In any event the Township Engineer shall decide upon the size of lines to be used and the above general criteria are set forth only as a guide to the subdivider.

In general, criteria affecting valve and hydrant locations shall be that not more than one hydrant is affected by shutting off any one section; hydrants are located within 600 feet along street lines of any property in the subdivision; not more than three valves are necessary to shut off any one section; and, the number of homes affected by shutting off any one section shall be limited to approximately 25.

§ 192-26 Sanitary sewers.

All sanitary sewer systems, sewage and industrial waste treatment works shall comply with the rules and regulations established by the Department of Environmental Protection of the State of New Jersey and Township of Harrison as amended and revised.

Minimum grades at terminal runs of all sanitary sewer lines shall be 1%.

Manholes shall be placed at every point where the sanitary sewer line changes direction. In no instance shall the spacing exceed 400 feet.

Prior to final approval the Engineer for the Township shall approve all sanitary sewer designs which will become a part of the municipal sewer facilities.

The developer is required to install all necessary sewage facilities including mains, laterals, house connections, manholes, pumping stations, force mains, and any other appurtenances required to make a complete connection to the then existing sanitary sewage facilities. Sanitary sewer pipe shall be sized for full flow from the tract. The Sewer and Water Commission may require larger pipe sized to accommodate future extensions. In addition to this, the developer should be required to pay a connection charge for connection of individual residence and/or business establishments to the Township's system.

§ 192-27 Storm drainage.

Runoff computations.

Computations of the rate of flow at any given location shall be based on the rational formula:

Q = CIA

In which

Q = Volume in cubic feet per second

C = Runoff factor

I = Intensity of rainfall in inches per hour

A = Watershed area in acres

In setting the value of the runoff coefficient "C," consideration will be given to the physical features of the drainage basin and the best available data on the future density of development of the drainage basin. In no case shall it be less than 0.40.

The intensity of the storm shall be based on the following:

Minimums.

[Amended 12-28-1989 by Ord. No. 20-1989]

As a minimum, a one-hundred-year storm shall be used for excess flow and continue downhill in the street without flooding adjoining properties.

As a minimum a one-hundred-year storm shall be used at all points with a relief swale or carried in the pipe.

As a minimum all culvert designs shall be based upon a one-hundred-year storm.

In order to provide for the general welfare, health and safety of the community and for the purpose of avoiding serious adverse, environmental and hydrological impact in the future, with respect to parcels of land in the Township of Harrison, in the County of Gloucester, the following new stormwater standards shall be set forth as follows and the Rainfall-Intensity Duration-Frequency Curve from Philadelphia presented in Technical Paper No. 25, prepared by the United States Department of Commerce Weather Bureau, shall be used. A copy of this is included in the standard detailed portion of this chapter. Time of flow curves are also included in that section for use in design. However, in order to provide for the general welfare, health and safety of the community and for the purpose of avoiding serious, adverse, environmental, and hydrological impact in the future with respect to parcels of land in the Township of Harrison, in the County of Gloucester, the following new stormwater standards shall be set forth by all developers who seek to develop in a major subdivision any parcel of land within the Township of Harrison:

[Amended 12-28-1989 by Ord. No. 20-1989]

The standard design for all major subdivisions shall reflect a one-hundred-year twenty-four-hour rainfall utilizing Soil Conservation Manual TR 55.

A 7.4-inch rainfall shall be utilized heretofore for the one-hundred-year standard.

There shall be, in addition to the one-hundred-year storm requirement, a freeboard basin requirement applicable to detention basins and retention basins to be located within the Township, which must provide additional emergency protection other that the one-hundred-year storm for downstream property owners in the Township of Harrison, by providing in the design a freeboard requirement over and above the one-hundred-year calculation to be one foot. The freeboard measurements in addition to the one foot must be in accordance with Soil Conservation Service guidelines and is set forth by appropriate state and local agencies dealing with soil conservation.

Standard headwalls shall be installed on all pipes and additionally, trash bars shall be installed on all pipes equal to or greater than 24 inches diameter.

Pipeline design: Storm sewer pipelines shall be designed by either of the following two methods. Both shall be based on the Manning equation and shall utilize the following friction factors The minimum allowable pipe size is 15 inches.

n = 0.015 concrete pipe

n = 0.021 corrugated metal pipe

Pipeline submerged.

This method is based on the assumption that when the storm sewer system is under maximum load the hydraulic gradient will be at or above the crown of the pipe and that flow in the lines will be controlled by head differentials between structures or other locations where the system is open to the ground surface, such as inlets or outlets, manholes and stream inlets or outlets. The head of water above the crown of any pipe can range from zero feet to a point which will not cause surface flooding.

The slope of the hydraulic gradient in any section of storm sewer between opening to the surface shall be calculated on the assumption that the pipe is flowing full at a constant velocity and at the required capacity.

The elevation of the hydraulic gradient at any point in the pipe shall be no lower than the crown of the pipe and no higher than the surface of the ground.

The elevation of the hydraulic gradient at any point where the system opens to the surface, such as an inlet or manhole, shall be three feet below the surface of the ground.

At all structures such as manholes, inlets, etc., where the pipe size does not change, the elevation of the hydraulic gradient shall be dropped 0.2 feet to allow for losses therein. Where the inlet and outlet pipe sizes are not the same, the elevation of the hydraulic gradient shall be dropped an amount based on the following formula:

H = 0.2 feet (plus) 0.8 (D2 - D1) feet

D1 = Diameter of inlet pipe

D2 = Diameter of outlet pipe

If D1 is larger than D2, head loss = 0.2 feet

(f)

The minimum slope of any pipe shall be such that a minimum velocity of 2.5 feet per second shall be maintained when the pipe is flowing 1/4 full.

Pipeline flowing full.

This method is based on the assumption that the hydraulic gradient will match the inside top of the pipe when the system is under maximum hydraulic load.

For this method, head losses through manholes, inlets, etc., shall be ignored.

The minimum slope of any pipe shall be such that a minimum velocity of 2.5 feet per second shall be maintained when the pipe is flowing 1/4 full.

When the pipe sizes change, the inside tops of the pipes shall be matched.

Continuous profiles for each reach of pipe shall be plotted, along with the location of the hydraulic gradient and the hydraulic information pertinent to each reach within the system. This information shall include the pipe size and type, the "n" factor, the slope of the hydraulic gradient, slope of the pipe, the design capacity, and the velocity at the design capacity.

Inlet design:

Stormwater inlets shall be equal to New Jersey State Highway Department inlet Type B. The maximum collecting capacities of the inlets shall be considered to be:

When installed on streets where the grade is 1.00%: five cubic feet per second.

When installed on streets where the grade is 2.00%: 4.8 cubic feet per second.

When installed on streets where the grade is 3.00%: 4.6 cubic feet per second.

When installed on streets where the grade is 4.00%: 4.4 cubic feet. per second.

When installed on streets where the grade is 5.00%: 4.2 cubic feet per second.

(f)

When installed on streets where the grade is 6.00%: four cubic feet per second.

Sufficient inlets shall be located and constructed so that the length of surface runoff will not contribute a runoff to the inlet exceeding the preceding designated collecting capacities.

The gutter grate of all inlets shall be set not less than two inches, nor more than four inches, below the gutter grade. The surface of the paving adjacent to the inlets shall be constructed to blend into the lowered gutter grade at the inlet in such a manner that a sudden dropoff or dip at the inlet will not be created. At such locations where drainage is entirely dependent on inlets, the collecting capacities of the inlets shall be designed for 1/2 of the preceding considered capacities.

Where surface water is collected from two directions at one street corner, inlets shall be placed at, or near, the tangent points of both ends of the radius. The use of one inlet in the radius shall not be allowed.

Access manholes shall be spaced at intervals of 500 feet (maximum) through rights-of-way and at sewer junctions where there are no catch basins.

Open channel design:

Open channel design should be based on the following hydraulic considerations:

Manning's equation.

n = .015 - best concrete lined ditch

n = .025 - best unlined ditch

n = .03 to .15 - fair to poor natural streams and watercourses

Velocity.

	Excavation Material	Velocity (fps)
	Fine sand and firm loam	2.50 to 3.5
	Stiff clay and hardpan	3.75 to 6.0
	Concrete line ditch	15

Ample freeboard should be provided on all channels.

The channel should be designed to conform, wherever possible, to the adjacent ground conditions. This means that it should not be projecting excessively above the surrounding ground or placed excessively below the surrounding ground.

Continuous profiles for each reach of open channel shall be plotted, along with the adjacent average ground and the hydraulic information pertinent to each reach within the system. This information shall include the type of channel lining, the "n" factor, the width of the channel bottom, the side slopes, the water depth, the design capacity and the velocity at the design capacity.

Open channels shall have a maximum side slope of three to one and shall have adequate slope protection.

Culverts: All culverts shall be limited to a single opening; multiple pipes will not be permitted. The design of culverts shall be such as to minimize the probability of debris accumulation.

Retention basin design: Retention basins shall be required on all major subdivisions unless deemed unnecessary by the Township Engineer.

Determine project area runoff:

Using natural ground coefficient.

Using ultimate developed ground coefficient.

Require storage for 5.5 inches maximum rainfall (twenty-four-hour rainfall occurring in 1960).

Indicate flooded area if additional two inches of rainfall during 24 hours following design storm.

Allowance for percolation and evaporation out of basins during and after the storm will not be considered in the calculations.

Basin storage capacities shall be calculated as follows:

Storage volume in cubic feet

Project Area in sq. ft. x Coefficient x total rainfall

(6)

The outlet structure shall be capable of discharging water equal to or less than the contribution calculated for the drainage basin area in its natural state before development for a ten-year storm period.

(7)

If required, profiles and sections indicating downstream capacities and proposals and/or easements for reconstruction or cleaning of all streams shall be submitted prior to consideration of the first final section.

§ 192-28 Streetlighting and site lighting.

[Amended 5-20-2002 by Ord. No. 13-2002]

Purpose. The lighting ordinance is designed to provide for safe street, site and intersection lighting in the Township of Harrison, which shall be applied for and installed by any developer of land whose application is encompassed by the Land Use Rules and Regulations of the State of New Jersey.

Lighting application and approval procedure.

Application. In conjunction with the developer's application for site plan review and/or subdivision, the developer shall submit five copies of a lighting application to the Planning Board and an additional five copies of the lighting application to the Township Municipal Clerk, with copies to any other concerned municipal, county or state agencies. An approved lighting plan is a required element of a preliminary site plan review and approval. No application for lighting shall be considered complete until the following has been received:

A written statement outlining the nature and scope of the desired lighting and a request for the installation of the lighting;

A proposed lighting plan prepared pursuant to the provisions of this section;

Payment of escrows and review fees;

A copy of the developer's landscape plan for the site.

Contents of lighting plan. The lighting plan shall contain the following:

The location of all lights shall be clearly identified on the lighting plan;

A symbol key to distinguish all types of lighting which may be proposed and to distinguish streetlights from other types of lighting;

An indication of the wattage of each light;

Intersections, culs-de-sac, and any other special conditions which may require a light;

A detail of the type of lighting to be used (for example, cobra head or traditionaire), lamp type, wattage, and manufacturer;

(f)

Style, height, and material of poles;

(g)

Date the lighting plan was prepared;

(h)

Clear delineation of the phases (if any) of construction;

(i)

The seal, signature and attestation as to preparation of the plan by an engineer, landscape architect, or architect licensed in New Jersey;

(j)

Locations of all existing lights within 100 feet of the site in question, including location of all poles and luminaries;

(k)

Photometric data shall be shown on the plan with isolux lines illustrated up to 2.0, 1.0, 0.50 and 0.25 footcandles lines. The plan shall indicate that the lines are maintained;

(l)

Locations of all proposed and existing freestanding and wall-mounted lights;

(m)

The location of canopy trees. To illustrate same, the developer may refer the Board to its landscape plan.

Regulations as to lighting.

Streetlights in residential areas must be installed at either end of all curves with a radius of less than 350 feet, or an internal angle greater than 30° or at any location where there is a change in horizontal alignment.

Streetlights in residential areas must be installed with a minimum footcandle of 1.0 over the full area of each intersection.

The maximum footcandle level should not exceed 0.25 footcandle over the right-of-way line except for at street intersections.

[Amended 6-6-2005 by Ord. No. 19-2005]

Light poles should be installed on the same side of a straight roadway in order to reinforce the direction of circulation alignment. A staggered layout should be avoided.

If cobra-head type of luminaire is proposed, recessed cobra luminaries should be used.

(6)

The height of the luminaire should not exceed 25 feet.

(7)

Lighting should be installed in any other location deemed necessary for safety reasons.

(8)

Street illumination should provide a hierarchy of lighting that distinguishes between the level of use. The amount of actual illumination should be designed based upon the conditions, the rural nature of the area, security concerns, safety and other conditions specific to the developed site and the Township. The following guidelines should be utilized:

[Amended 6-6-2005 by Ord. No. 19-2005]

All intersections should be lit with a minimum of a one-hundred-watt to a maximum of one-hundred-fifty-watt high-pressure sodium fixture. The wattage will vary based on the size of the intersection or any possible safety issue.

Fixtures should be provided at the end of the cul-de-sacs or street ends in order to provide visual road termination.

The fixtures along streets should be spaced a minimum of 250 feet to a maximum of 350 feet apart, with fifty-watt high-pressure sodium fixtures. Also, fixtures should be provided at curves or where horizontal or vertical changes in alignment occur.

(9)

All lighting shall be installed only in locations that have been approved by the Planning Board Engineer based upon safety considerations.

(10)

No certificate of occupancy shall be issued to any improvement within the approved phase of the development until all of the lighting as proposed in the approved lighting plan has been installed and the lighting is operational.

(11)

Any proposed lighting shall be located in between property lines or in open spaces in order to reduce the impact of a fixture on one residential property.

[Added 6-6-2005 by Ord. No. 19-2005]

(12)

The Board will review and approve the style of lighting proposed. The Board will consider aesthetics of the lights as well as providing dark sky consideration via the use of a shielded light fixture.

[Added 6-6-2005 by Ord. No. 19-2005]

Installation of lighting which abuts a dedicated public street.

After approval of the lighting plan by the Harrison Township Planning Board, the developer shall immediately file a copy of the approved plan with the utility company and with the Municipal Clerk's office and shall make request for the installation of streetlighting.

All streetlighting shall be installed by the utility company which services the Township.

Upon receipt of a request for the installation of lighting made to the Municipal Clerk, the lighting plan will be reviewed by the Municipal Clerk of the Township of Harrison and such other professionals as the Municipal Clerk may require for such review and opinion, to determine the cost of the installation. The expense for the cost review by these professionals shall be charged against the applicant's escrow account. The Municipal Clerk shall notify the developer in writing of the estimated cost of installation. Within 15 days of the date of the written notification, the developer shall pay the required amount as requested to the Municipal Clerk of the Township of Harrison. Upon receipt of the fees, the Municipal Clerk shall order the lights to be installed, directly from the utility company serving Harrison Township.

Municipality to assume responsibility for streetlighting on a dedicated public street connected to a public utility. Section 40:55D-53.6 of the Municipal Land Use Law (N.J.S.A. 40:55D-53.1 et seq.) is adopted in its entirety. Upon notification in writing by the developer to the approving authority and governing body of the municipality that the streetlighting on a dedicated public street has been installed and accepted for service by the public utility and that certificates of occupancy have been issued for at least 50% of the dwelling units and 50% of the floor area of the nonresidential uses on the dedicated public street or portion thereof pursuant to § 29 of the Municipal Land Use Law (N.J.S.A. 40:55D-38), the municipality shall, within 30 days following receipt of the notification, make appropriate arrangements with the public utility for, and assume the payment of the costs of, the streetlighting on the dedicated public street on a continuing basis. Compliance by the municipality with the provisions of this section shall not be deemed to constitute acceptance of the street by the municipality.

Responsibility for maintenance and cost of site illumination. The obligation to maintain and provide area lighting located within a development, where the provisions of N.J.S.A. 40:55D-53.6 of the Municipal Land Use Law do not apply, shall be the responsibility of the developer and/or owner of the property or their designee.

§ 192-29 Blocks.

Block length and width or acreage within bounding roads shall be such as to accommodate the size of lot required in the area by Chapter 225, Zoning, and to provide for convenient access, circulation control, and safety of street traffic.

In blocks over 1,000 feet long, pedestrian crosswalks may be required in locations deemed necessary by the Planning Board.

For commercial, group housing, or industrial use, block size shall be sufficient to meet all area and yard requirements for such use.

§ 192-30 Lots.

Lot dimensions and area shall not be less than the requirements of Chapter 225, Zoning.

Insofar as is practical, side lot lines shall be at right angles to straight streets, and radial to curved streets.

Each lot must front upon a street at least 49 feet six inches in width. Where extra width has been dedicated for widening of existing streets, lots shall begin at such extra width line, and all setbacks shall be measured from such line.

Where there is a question as to the suitability of a lot or lots for their intended use due to factors such as soil conditions, rock formations, flood conditions, or similar circumstances, the Planning Board may, after adequate investigation, withhold approval of such lots or require remedial action before approval.

No single-family residential dwelling unit shall be permitted to front on a residential collector street, primary street, or controlled access highway.

[Amended 6-15-1992 by Ord. No. 9-1992]

If dwelling unit lots are designed with reverse frontage, the rear yard requirement shall be increased to 1 1/2 times the minimum rear yard specified for that zone district in Chapter 225, Zoning, exclusive of the buffer area.

§ 192-31 Recreation and open space.

[Amended 9-18-1989 by Ord. No. 10-1989; 6-5-1995 by Ord. No. 11-1995; 5-6-2002 by Ord. No. 12-2002; 6-6-2005 by Ord. No. 21-2005; 5-1-2006 by Ord. No. 12-2006; 2-16-2010 by Ord. No. 02-2010]

The developer shall design and install recreational facilities as part of the plan for a planned unit development, planned unit residential development or residential cluster. The land proposed to be set aside for recreational facilities and open space may be dedicated or available to public use. In the event that the recreational facilities are not dedicated for public use, then the developer shall provide for an organization for the ownership and maintenance of any recreational facilities for the benefit of owners or residents of the development.

Total area per development devoted to recreation. In order to provide for the general welfare of the public, all residential subdivisions which result in three or more lots for use as residential home sites shall set aside a percentage of the total area of the subdivision for off-street recreation and/or play areas. The percentage of the total lot area which must be utilized for recreational and/or play areas is calculated as follows:

Single-family homes on one-acre lots. In all residential developments in zones permitting one-acre lots, 10% of the gross area of the development shall be set aside for recreation and/or play areas.

Single-family homes on one-half-acre lots. In all residential developments in zones permitting one-half-acre lots, 10% of the gross area of the development shall be set aside for recreation and/or play areas.