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Executive Summary Schulke, Bittle & Stoddard, LLC has been authorized by the Indian River County Department of Utility Services (IRCDUS) to prepare a report determining the feasibility to provide irrigation quality re-claimed water (Reuse Water) for the North Indian River County barrier island vicinity, including the feasibility to run new reuse water mains south on SR A -1-A, from CR 510 to Old Winter Beach Road, and the report will provide preliminary recommendations for the size and location of the reuse water transmission main and distribution mains in SR A -1-A, and size of storage tanks and pumping station(s) to be located at the Sea Oaks WWTP site. The Reuse system infrastructure is generally located along approximately 2.4 miles (12,720 If) of A -1-A, from CR 510 to Old Winter Beach Road. Feasibility to provide irrigation quality re-claimed water (Reuse Water) The reuse transmission and distribution mains contemplated with this preliminary engineering report and evaluation are proposed along SR A -1-A between CR 510 and Old Winter Beach Road. Right of way width is limited, and existing roadway and utility improvements limit the area available to install the reuse mains. Therefore, a detailed evaluation of the constructability of the reuse main was prepared, and it was determined that adequate area is available to install the proposed reuse mains along the east side of SR A -1-A using the directional bore method of pipe installatio Preliminary Recommendations: System specifications, size an•fl•w allocations This report provides an estimate of the potential maxim de . and fose water from all communities on the North barrier island, from Old Winter Beach Roa o to Windsor. This estimate approaches 4.2 MGD. However, the likely demand will be lower. Gosidering t at of the 4.2 MGD estimated demand, at least 2.25 MGD of this estimated demand comes from evelop► eats / communities within the COVB utility service area. Currently the COVB provides limite a oun of reuse water to several developments (including John's Island). Some existing de„ .elopme t specially those lying in the city's service area who may be able to refuse service, may notonnec�t to IRCDUS reuse water. This report also models and estimate D 'reuse i Fastructure capacity and has found that the reuse transmission system / pipe netw o TId •oten Tally deliver 4.34 MGD of reuse water (if available). However, actual capacity of th IRCflU re se system (the entire system) to deliver reuse water is likely lower. It will be many years efore the requisite quantity of reuse water is available from the county's three WWTP's. In addition, the capacit f theiobart reuse storage tank and pumping facility may be a limitation. The facility was designed to deli er GD with a 3.0 MG storage tank. Consider that if total barrier island demand reached 4.2 MGD, and a fisting mainland demand is 0.79 MGD (Redstick and JI West), the total demand from the Hobart facility could approach 5.0 MGD, or over 3 times its original design. Further, the transmission mains (double 12" parallel mains) that cross (and hang from) the Wabasso Bridge are older system components, and IRCDUS may not want these lines constantly running at peak capacity. It is SBS recommendation that IRCDUS plan to construct facilities that will provide for the future demand of at least 3.116 MGD of reuse water to the North Barrier Island. This flow allocation is depicted and listed in Scenario C in the Hydraulic modeling and is summarized as follows: -1.964 MGD - flow to north barrier island communities within IRCDUS service area -1.0MGD -toJI -0.153 MGD - to COVB service area - the Shores and River Club 3.116 MGD total Cost of Improvements: The engineer's opinion of probable cost to construct the recommended improvements are as follows: -16" Reuse Transmission Main: -12" Reuse distribution main/ services: -Sea Oaks Reuse water storage and pumping facilities: -Ext. of reuse main from OWBR to JI exist. pump station: -Surveying, engineering, permitting, administration, CAI: -Total Cost: $1,494,478.87 $2,134,399.40 $3,053,020.00 $ 218, 730.00 $ 485,875.00 $7,386,503.27 150