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BOOK 93 PnE 28 ON MOTION by Commissioner Macht, SECONDED by Commissioner Eggert, the Board unanimously approved the contract with F.I.T. in the amount of $36,847, as recommended by staff. CONTRACT IS— ON FILE IN THE OFFICE OF THE CLERK TO BOARD CONTRACT ADDENDUM WITH UNIVERSITY OF FLORIDA - PEP REEF PHYSICAL MODEL The Board reviewed the following memo dated 7/27/94: TO: James E. Chandler, County Administrator THROUGH: James W. Davis, P.E., - Public Works Director FROM: Don G. Donaldson, P.E., Coastal EngineelyiD. SUBJECT: Indian River County/Vero Beach Breakwater University of Florida Physical Model Contract DATE: July 27, 1994 FILE: U0nWD]M.A= DESCRIPTION AND CONDITIONS Staff has received a draft report of the physical model studies by the University of Florida (UF). The OF conducted a physical model test to evaluate four separate breakwater arrangements at four water depths, including a no breakwater case (see Attached). The results clearly demonstrate the breakwaters ability to reduce wave heights. They also indicate that a continuous alignment can increase the longshore current. The staggered case (Case C) was thought to provide the best chance of wave height reduction without the increase in,currents. However, the results suggest that the staggered units were too close and the segments were too short. Staff and the OF feel that the three -segment configuration (Case B) had the least impact to longshore currents. However, the gaps provide too much wave transmission. The best configuration is likely to be a long segment, staggered breakwater. The OF has agreed to test this configuration and include the result in the report. The cost for this additional testing is $2,500.00. RECOMMENDATIONS AND FUNDING Staff recommends that the board authorize a contract addendum to the University of Florida in the amount of $2,500.00 for the additional testing. Funding is from Tourist Tax Revenue account 119-144-572-067:63 28 August 2, 1994 r � i