5/14/1986 - Laserfiche WebLink

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ON MOTION by Commissioner Lyons, SECONDED by Commissioner Wodtke, the Board unanimously directed staff to work with the Forestry Division to establish a few fire breaks in the area rather than the complete.clearing requested by the residents of Vero Lakes Estates. WABASSO CAUSEWAY MALNTENANCE DREDGING AND EROSION The Board reviewed the following memo dated 4/14/86: TO: DATE: 'FILE: �-,,, -.'• April 14, 1986 ` �O Ecinmis loner Pat Lyons, V. Chairman ea"" -""UT msmissioner Dick Bird, Chairman of 1 Paris & Recreation Commission Fi ="Ce aL � .�••a•J SUBJECT:. Wabasso Causeway Maintenance THROUGH: Michae ght, County Admn. Dredging and Erosion Q FROM: James W. Davis, P.E. '� ' PEFERENgg§: SOS: 1) Commissioner Patrick Public Works Director Lyons o c el Wright dated 3/24/86 2) Commis- sioner Pat Lyons to Art Challacombe dated 3/24/86. In response to your 3/24/86 memo and to inquiry voiced at the 4/10/86 Recreation Committee meeting, I have researched the feasibility of maintenance dredging beneath the Wabasso low level- bridges spanning the Indian River. The following permit information and alternatives are offered: - • N• M1 On 4/11/86, I spoke with Mr. Marc Ady, Envirormlental Specialist of the Florida D. E. R: in Orlando (phone suncom. 393-1011) . I explained- the fact that the existing bridges were constructed from September, 1968, to June, 1970, and that the original design specified a 150' wide channel beneath the west bridge to a depth of -6.5' MSL. °- The channels have repeatedly silted in, and in 1978, the County received a D.E.R. Permit #31-11410-4E and a C.O.E. Permit #78J--1333 to excavate only 950 C. Y. of material below the MHW to restore minimal flow beneath the bridge. This work was done by clam shell and the spoil trucked to upland sites, all by County equipment. In response, Mr. Ady informed me that: 1) If the original bridge work and dredging was performed prior to April 3, 1970, the County could be exempt from a General Permit, which may involve an Environ - rental Impact Statement. This exemption depends on the original D.O.T. dredging specifications prior to April 1970, and if the proposed maintenance dredging does not go deeper than 5 feet below mean low water. Mr. Ady recommended that we prepare a permit application including the following: 1) Plan view, profile and cross-section drawings of the proposed project indicating 14LW elevations, MHW elevations, proposed and existing hydrography and other pertinent features. 2) The D.O.T. specs for the original. dredging. 3) Date the original dredging was complete. If we are not exempt, we may have to prepare an Environmental Impact Statement. MAY 14, 1986 37 BOOK 64 pm, 37