03-28-2011 Council Minutes - Laserfiche WebLink

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MINUTES OF THE ORONO CITY COUNCIL MEETING Monday, March 28, 2011 7:00 o'clock p.m. (7. OLD CRYSTAL BAY ROAD RECONSTRUCTION, Continued) A cost analysis has been completed comparing 250 W High Pressure Sodium versus an equivalent LED lamp. The estimated total annual electrical cost for the 29 proposed light poles is $2,997 for the HPS and $1829 for the LED. The initial capital cost for the LED fixtures is slightly higher than the HPS fixture. Based on the capital cost and energy usage only, the estimated payback period is two years if the LED fixtures are utilized. Generally the useful life of a LED lamp is approximately four times the life of a HPS lamp. Considering the capital expenses, energy savings and reduced maintenance, there is an estimated 20 -year life cycle cost savings of approximately $74,000 if LED lamps are used. The LED lights will emit a bluer light whereas the high pressure sodium lights emit more of a yellow light. Bremer asked which lights are becoming more common. Kellogg indicated the LED lights are more popular since they last longer and require less maintenance. The advertised life span of an LED is three to four times longer 'than a high pressure sodium light. LED bulbs simply dim over time and never completely go black. The Public Works Department is in favor of the LED lights. McMillan asked whether any thought has been given to putting the lights on timers. • Kellogg stated he did discuss that with the Public Works Department and that there was some question on what hours the timer would be set for. Kellogg noted the cost savings would be fairly minimal and that there is a cost feature to add timers to the lamps. • McMillan asked whether some of the lights could be put on timers, such as the lights at the crosswalks: a Kellogg stated their electrical engineers have stated you should either light it to industry standards or not at all to avoid the drivers going from dark to light. Franchot asked if the best practice is to turn them on at night and turn them off at daytime. Kellogg noted they would be on photo cells. Franchot suggested the City Council follow best practices with the lights. Printup asked if the light poles are 28 -feet. Kellogg indicated they are. Printup asked what the purpose is for planting trees on the roundabouts. Kellogg stated the landscaping was designed to prevent people from looking at the oncoming traffic when going through the roundabouts and that the lights would be illuminating the roadway. Printup asked whether there will be light poles located on the roundabouts. Kellogg indicated they will not be located in the center island of the roundabout but around the perimeter. Printup stated the feasibility study on page three indicates that the poor condition of the road was the reason that the City elected to move this project up in addition to traffic congestion and safety concerns. Page 8 of 24