University City MO - Street Light Audit Report

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TABLE 22 ACQUISITION OF ALL LIGHTS: COST AND PAYBACK 6M RATE Annual Lighting Payback in Annual Payback in Annual and Annual Years at Rate Type maintenance Years at $467 Lighting Cost Maintenance Savings $1,100 per cost per light Cost light 6M UNMETERED Energy $97,931.05 $280,000.00 $377,931.05 $310,345.51 5.0 11.8 Only 6M UNMETERED Energy and $161,186.88 included $161,186.88 $527,089.68 3.0 7.0 Maintenance Annual 6M METERED Energy $109,079.98 $280,000.00 $389,079.98 $299,196.58 5.2 12.3 Acquisition of Post Top style lights Only Another option for consideration is the purchase of only Post ToThe Ameren costs for post top style lights are significantly higher than the costs for the explained by an Ameren representative as such: The cost of each post top light includes the cost of maintenance and replacement of the poles as well. The difference in costs for the same types of bulbs in post top lights versus cobra lights is as follows: TABLE 23 POST TOP VS. COBRA AMEREN COSTS 5M rate Post 5M rate Cobra: 5M rate Cobra: 6M rate 9500 Bulb Type Top Enclosed Open Bottom HPS $1.49 100 watt HPS $18.81 $10.15 $8.98 Not only are the costs important to note in this option, but cur maintains many of the exact same or very similar lights as the Ameren owned post tops. The staff is knowledgeable regarding maintenance of these lights. Below are calculations for the same options as above, except purchasing only (approximately) 860 post top lights and continuing to pay the 5M rates for the cobra lights. The same three scenarios are calculated as above. Purchasing and metering 860 post top lights at $467 per light would equal $401,620. Purchasing and m light would equal $946,000. It is important to note that all of the pole charges are removed as indicated in the beginning of this section, the yearly annual cobra light cos year making the acquirement of the post top lights only a much m 35 Page