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I TO: The Honoratlfle Members of DATE: October 15, 1984 the Board Af County Commissioners "F.----. ROUGH: Michael. Wright, 10 i•. • t3 . . �,_ r. 1' County Admi 1 j . Sa; 1FROM:•. w.,t•.:,..1._,� • JamesW. Davis, .Public W9rks Directo FILE: • SUBJECT: Bridging of 14th Street Canal East; of Rockridge, South of Fairlane'*`. ' Harbor " REFERENCES: G DESCRIPTION AND CONDITIONS Kimley Horn and Associates, Engineers for the Southerly Extension of Indian River Boulevard, and County staff met on October 8, 1984 with the property owners who own lots along the Rockridge canal. Many of these owners have small boats and Ilse the 14th Street canal for ingress/egress to the Indian;River. •The purpose of the meeting was to inform .. the boat owners that the bridge proposed for construction . at Indian River Boulevard would provide approximately 9.2 ft. of vertical clearance at Mean High Water and approximately 9.96 feet of vertical clearance at Mean Low water. Once this vertical clearance is established, the Engineers can apply -for a Coast Guard Permit. The owners of approximately 13 lots wee represented.. ALTERNATIVES AND ANALYSIS Two property owners expressed that•a 10' vertical clearance at High Water is required for their boats to use the waterway. This condition is required due to less than a'1 foot water . • depth in the channel at low water and the fact that 2 boats using thechannel have a vertical height of approximately: 10 •feet.. tl .:....4- i'. -,. -., ;..., • The consultants have indicated that for every 1 foot increase in height,' the cost:of the approach fill and bridge• cost would increase approximately $35,000 to $40,000. Also, as the height increases it may be necessary to require the - removal or.relocation of mobile homes encroaching in the County right- f- at Fairlane Harbor Mobile Home Park. It was'also mentioned that use of the waterway is restricted:by.the shallow depth of water and the residents request that the channel•be dredged. Drainage in the Rockridge area would improve if the channel is dredged. The City and County have designed and obtained permits to dredge the nnel and are planning the work. RECOMMENDATION It is recommended that the County instruct the•consulting Engineers. to include"4r4ging of the channel as a part of the Indian"River Boulevard 7'ro ect and that the Bridge be designed tp provide the 9.2 feet to 9.96 feet of vertical clearance as proposed. The dred ing of the ch nel would a lglcy. he boats to use the ri ge a ow tt a and t e • approximat 1y 10 feet vertira-r-cTearance would be available. Mr. Nelson informed the Board that Director Davis did get soundings of the canal, but then they were told the road monies could not be used for this. Mr. Nelson then gave a lengthy list of the agencies and officials the residents have contacted for help, noting that a letter from former Commissioner Lyons suggested they should tax the people on the canal. Mr. Nelson advised that after research, it was found that the taxes paid by the homes on the canal are 150 times higher than other homes in the area. He then submitted pictures of comparable homes which 22 APR 12 1988 BOOK .72 PAGE 22