The City will need to start replacing the decorative street light poles and fixtures around the commons with new ones because repair parts are no longer available for the current ones. The Public Works Board needs to have a discussion on establishing a new Streetlight Design to be used for the replacement of the decorative streetlights. The Public Works Board will evaluate the lights for safety, aesthetics, light color, and light pollution. In this meeting, staff wants to solicit feedback from the Public Works Board regarding the following goals:
- Review established lighting styles in the City’s downtown, identify issues, and recommend improvements; and
- Recommend lighting styles, as deemed appropriate, to address the downtown character while considering fiscal impacts pertaining to maintenance and proposed improvements; and
- Draft Streetlight Guidelines for Council’s consideration.
This will facilitate the selection process by allowing staff to narrow down the styles for use. Staff will schedule a follow up Public Works Board meeting to present a draft design guidelines after collecting feedback from this meeting. The Public Works Board is requested to discuss and recommend appropriate streetlight styles for the Downtown area to the City Council for final approval.
Background
In 1996, the Economic Development Commission and the Parks Board started discussions regarding street lights suggested for use in the Commons and N. Main Street. The discussion included parameters that were considered desirable for consideration in the selection of street lights.
In 1998, the Public Works Board authorized the purchase of decorative streetlights for the Commons area. The presentation to the Public Works Board was primarily regarding street lights for decorative purpose lighting that could also be utilized within street right of ways. The proposed approach was to utilize a King Luminaire twelve foot tall cast ductile iron pole for street lights around the Commons. This approach provided a unified aesthetic theme throughout the Downtown. It allowed the community feature to gain desired streetlight aesthetics including the pole-type and light-fixture style.
A decorative type of fixture, that also provided a design to address traffic safety and pedestrian-level light, was approved by the Public Works Board for use in the Commons and for future expansion to N. Main Street. The selected street light fixture type was a King post top luminaire with a traditional style design.
In May of 2006, The Council adopted ordinance 981 which updated the city’s lighting requirements to standards that are perceived to reduce light pollution. The proliferation of outdoor light use, particularly that light projecting into the night skies, was determined to be an area of environmental degradation – light pollution. The purpose of the ordinance 981 was to regulate outdoor night lighting fixtures to preserve and enhance the areas dark sky while promoting safety, conserving energy and preserving the environment. One of the most significant features of the Ordinance is the requirement for down cast lighting. The current fixtures used in the Commons do not meet the down cast requirement.
Discussion
While street lighting systems were originally designed to address traffic safety, the environmental issues of lighting design are recognized as critically important to maintaining quality of life in neighborhoods. These issues go beyond the amount of light produced and include minimizing light pollution, enhancing the urban environment during the day by use of decorative poles and fixtures with underground wiring and at night by the provision of pedestrian-level light, deterring undesirable or illegal activities, increasing safety, restricting unwanted truant light onto private property and minimizing glare, power consumption, cost and visual impacts (day and night).
The City currently has 1431 street lights with basically three different styles/variations: cobra head or LED fixture with aluminum pole or on a utility power pole (wood), globe fixture type with aluminum pole, and lantern fixture with wood pole (either round or square). Exhibit ‘A’ is a map showing the locations of the different street lights. Exhibit ‘B’ includes pictures of the light styles/features.
Standard cobra head with wood power pole mounted – This is the typical light standard used in most areas of the City. The parts are easy to obtain for maintenance and replacement. The same style is also used by many other local agencies. There are 1028 cobra head lights in the City which is about 72% of the total.
These traditional streetlight fixtures are used to illuminate many roadways. They vary in design; some newer ones have their lamps recessed in the fixture, with flat, horizontal glass shields underneath, sending most of their light downward to the street and sidewalks. The majority, though, feature a hanging globe diffuser/shield, sending much of their light output sideways rather than downward.
LED Fixture – In 2012, LML&W installed 300 new LED light fixtures on existing wood poles utilizing Federal Energy Efficiency and Conservation Block Grant Program (EECBG). Compared with other high sodium pressure lights, LED lights are more energy efficient and cost effective. The new lights are mainly installed along Mulberry Street, E. Lake Street and Main Street. More LED lights are being installed with replacement needs. Staff is actively looking for grants when they are available.
Cobra fixtures/aluminum poles – This style light fixture used was used in the downtown area. The cobra head luminaire on an aluminum pole is typically only installed in conventional underground network areas. The pole is twenty feet tall. There are total 23 of this style light used in the City.
Cast Iron Pole with lantern style light – This is the type of street lighting used in the Commons and around the municipal building. City maintenance crews must remove failed lights and use the parts to maintain the remaining lights due to unavailability of the fixture parts. Chosen for their period appearance, these streetlights feature modern-day high-pressure sodium lamps.
Particular concerns when making the selections include the pole style and locations for installation:
Pole
A utility pole is a pole used to support overhead power lines and various other public utilities, such as cable, fiber optic cable, and related equipment such as transformers and street lights. LML&W uses wood utility poles for all their overhead electrical applications. The Utility has the equipment and resources to easily handle installation, maintenance and removal of wood poles. Decorative wood poles are not what the Utility normally handles. There are wood poles designed specifically for street lighting, but they have to be shorter which means more of them are needed to meet lighting illumination standards in an area. Wood utility poles tend to be the least aesthetically pleasing option. Wood pole treatments are generally not environmentally friendly.
Aluminum poles have a longer life than steel or fiberglass and are still light weight. They can also be painted to have the desired color. Fiber glass is light weight and has the lowest cost. Steel poles reduce may reduce installation and maintenance costs while placing dependable and appealing street light pole designs. Steel poles; however, are subject to rusting at the base limiting their life span. There are still a few steel poles in use, particularly in front of the high school, which will be replaced in this year.
Location
The existing decorative lights are typically located around the Commons in the downtown area and the Municipal Building. However, the selected decorative light fixture needs to be phased out because parts are no longer available. To make modifications, a different light fixture style may require installing new poles, new conduits and bases.
Public Contact
Posting of the agenda.
Recommendation
Staff recommends that the Public Works Board provide feedback regarding the following goals to:
- Review established lighting styles in the City, identify issues, and recommend improvements; and
- Recommend lighting styles, as deemed appropriate, to address Downtown character while considering fiscal impacts pertaining to maintenance and proposed improvements; and
- Draft Downtown Streetlight Guidelines for Council’s consideration.
Staff will present at a subsequent Public Works Board meeting to review a draft Design Guidelines after feedback from this meeting.
Attachments
I. Exhibit A – Street light location map
II. Exhibit B – Existing street light details
III. Exhibit D –Lights fixture for presentation at meeting