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January 25, 2005 <br />Mr. Steve Doyle <br />Assistant Utilities Director <br />Indian River Co. Dept. of Utility Services <br />1840 25th St <br />Vero Beach, FL 32960 <br />Re: Rockridge Sewer Collection Rehabilitation Analysis <br />Dear Mr. Doyle; <br />In accordance with our scope of services, PBS&J is pleased to submit 12 copies <br />of the final technical memorandum for the Rockridge Sewer Collection <br />Rehabilitation Analysis. After submittal of the draft repo t and upon fu :her input <br />from County staff, PBS&J has concluded that the emergency power option will <br />serve the needs of the County most effectively. This conclusion results from <br />further review of each alternative in consideration of initial capital costs, <br />operations, maintenance and impact to the customer. The central sewer option <br />would be difficult to implement, would be extremely costly due to the soil <br />conditions, and would result in a large impact to the customers. The vacuum <br />sewer system was an attractive option, but would result in a large impact to <br />customers and appears to require substantial maintenance for proper operation. <br />The emergency power option would result in the least amount of impact in terms <br />of interruption of service to the customers, maintenance and operation of a <br />system. <br />In a further review of the emergency power option, PBS&J has provided a more <br />detailed cost estimate to include three generator sites with buildings that <br />attenuate sound and give proper security and appearance. Also, land acquisition <br />costs were included as well as additional ventilation requirements for the <br />enclosed buildings. Finally, since the area is prone to flooding, it is assumed that <br />each generator would be installed above the 100 -year flood elevation, requiring <br />each site to be raised. The currently proposed system was reconfigured to the <br />three sites selected by County staff. The cost estimate has risen considerably <br />from the draft report in consideration of the factors listed above. <br />Since the project is eligible for FEMA funding, PBS&J felt it would be in the best <br />interest of the County to understand the complete cost to design and implement <br />this option, which has resulted in a higher cost estimate. The current cost has <br />been included in the application for FEMA funding. The funding application has <br />been completed concurrently with this effort under a different work authorization <br />and is attached for your review. <br />335 East Van Fleet Drive • Bartow. Florida 33830 • Telephone- 863.333-7000 • Fax86'4 533-7888 • ipv. v pbsixw <br />