§ 10-176. Streetlight specifications.

A lighting plan, drawn to scale, shall be provided for all city roads where streetlights are proposed. The lighting plan shall be consistent with the specifications of this section for streetlights.

(1)

Scope. These specifications shall apply to the design and installation of streetlights in subdivisions and multifamily, commercial, and industrial developments.

(2)

Fixtures. All fixtures and poles shall meet the requirements of the city and all maintenance shall be the responsibility of the power provider. Fixtures shall be mounted a minimum of 16 feet above the ground and each fixture shall have appropriate arm length to illuminate the street. The city, in addition to other requirements, may require a light to be located at street intersections within the development. In order to provide a uniform lighting standard, the following bulb and fixture types shall be used for providing streetlights and pedestrian lighting in the city:

a.

Two-lane residential roads: 150-watt high pressure sodium cobra head fixture.

b.

Two-lane collector roads and residential areas with safety and/or visibility issues: 250-watt high pressure sodium cobra head fixture.

c.

Over two-lane roads: 400-watt high pressure sodium flood way fixture.

d.

Pedestrian lighting: 175-watt high pressure sodium bulb, (standard overlay or PCID District pole).

Alternate bulb types may be approved by the community development director; LED lighting with equivalent luminosity may be used.

(3)

Monthly utility costs. The utility costs of street lighting shall be borne by the developer, property owner, or a homeowners' association. The dues of homeowners' association members shall be reasonably calculated to pay the monthly utility costs.

(4)

Design criteria. Street lighting design criteria for all residential streets shall conform to the design standards given in section 20 of "Illuminated Engineering Society Handbook," latest edition.

(5)

Downcast lighting. To minimize light pollution, all streetlights shall use shielded or downcast lighting fixtures.

(6)

Recommended illumination. The recommended illumination for all residential streets shall be 0.5 horizontal footcandles or 0.5 lumens per square foot of the roadway pavement when the illuminating source is at its lowest output.

(7)

Minimum illumination. The lowest footcandle value at any point on the road pavement shall not be less than one-sixth of the average value, i.e., maximum to minimum ratio of 6:1.

(8)

Luminary light distribution. The classification of luminary light distribution shall be IES distribution type MS III.

(9)

Mounting height. The following mounting heights with reference to output of lamp and type of lighting pattern is recommended:

a.

Vertical light distribution M = medium.

b.

Vertical light control S = semi cut off or cut off.

c.

Lateral light distribution Type III.

Streetlight Mounting Height

Lamp	Output	IES	Typ. Mounting height
150 Watt HPS	14,500 Lumens	Type III Long	29 feet (1)
150 Watt HPS	14,500 Lumens	Type III	16 feet
Notes: (1) 29-foot mounting height shall only be used in areas with existing overhead wiring.

 

(10)

Luminary spacing. The spacing of the luminary shall be governed by factors such as location of utility poles, block lengths, property lines and geometric configurations of the terrain features.

(11)

Mounting poles.

a.

The mounting poles shall be as per the latest regulations and standards of the National Electrical Code, the National Electrical Safety Code, the American National Standards Institute and NEMA. The basic design criteria required is resistance to 100 mph winds including 1.3 gust factor.

b.

The pole top shall have a top tenon of three inches o.d. so as to fit a slip fitter.

c.

The poles shall have a handhold four-inch by 12-inch opening with an aluminum cover fitted to two stainless steel pentahead screws. The center of handhold opening shall be approximately 24 inches from ground level.

(12)

Luminaries. Luminaries shall be fitted with built-in ballast and photoelectric control and shall conform to meet all the requirements of latest regulations and standards of EEI and NEMA depending upon the lamp load and type and circuit voltage.

(13)

Wiring and cabling. All wiring and cabling shall conform to the appropriate utility company's specifications.

(Ord. of 8-11-2016, § 3.22)