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Jefferson Parish Department of Public Works 18th Street Lighting Design
BKI was selected by the Jefferson Parish Council to provide electrical street lighting designs on an as needed basis. The first assignment under this contract was the design of replacement street lights to 18th Street between Division Street and North Arnoult Streets in Metairie, LA. The new street lights were required to improve visibility and safety of the residents in this area of Metairie.
BKI provided engineering design services to prepare preliminary plans and final plans, specifications, and construction cost estimates for the addition of Jefferson Parish owned roadway lighting to 18th Street, Division Street and North Arnoult Street in Metairie, LA. The existing roadway lighting was provided by the local utility company and installed on wood poles. Jefferson Parish Government elected to install decorative roadway luminaires between the edge of roadway and property line.
The new lighting design consisted of 14 foot high poles with 150 watt high pressure sodium luminaires rated to withstand the 100 mph three-second gust wind rating in this area. The project limits include approximately 1350 feet of roadway length which required the design of 24 poles and luminaires installed staggered on both sides of the roadway.
Due to the length of the project, multiple electric services were required from the local power utility company. The end result was a pole and luminaire spacing of approximately 105 feet.
LADOTD High Rise Bridge Lighting Improvements
BKI was selected to design improvements for lighting on the Lafitte Larose High Rise Bridge. The project scope of work limits included the bridge main span and elevated approach ramps on the north and south sides of Bayou Barataria. This encompassed approximately 4600 feet of bridge and approach ramps.
New work designed within the scope of this project included a new lighting system consisting of luminaires, luminaire support structures and lighting circuitry to the luminaires. Electrical service for the lighting was derived from the existing lighting control center located at Jean Lafitte Blvd. near the south end of the bridge. New distribution conduit, conductors and boxes were installed on the east side of the bridge. Existing lighting controls were reused.
The existing bridge was not designed or built with provisions for the addition of lighting poles, thus a support structure was retrofitted to the existing structure at each pole location. The heaviest load was used for analysis, that being a 30’ light pole with 8’ arm and allowance for up to 75 lbs for a light fixture on the arm, approximately 350 lbs total. Poles and support structures must withstand 130 MPH sustained wind.
The support structure consisted of a fabricated steel bracket assembly which is bolted to the Jersey barrier on the east side of the bridge. An analysis of the existing bridge structure was conducted with the additional loads of the proposed lighting systems. The existing structure handled the loads imposed by the pole and bracket assemblies proposed method of attachment.
Jefferson Parish Nicolle Boulevard Street Lighting
BKI provided engineering design services to prepare preliminary plans and final plans, specifications, and construction cost estimates for the addition of roadway lighting to Nicolle Blvd. from Lapalco Boulevard to the main canal. The existing roadway did not have any existing roadway lighting. Jefferson Parish Government elected to provide roadway lighting on Nicolle Blvd. by installing decorative roadway luminaires behind the shoulder of the West bound traveling lane. The new lighting design consisted of 30 foot high poles rated to withstand the 130 mph 3 second gust wind rating in this area. The poles were specified with single arms to providing illumination to both travel lanes.
The project limits include approximately 9000 feet of roadway length which required the design of over 60 pole and luminaires. Due to the length of the project, multiple electric services were required from the local power utility company. The lighting photometric calculations were performed based on IES RP8-2000 roadway lighting standards. The end result was a pole and luminaire spacing of approximately 150 feet.