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M Chairman Eggert moved the discussion to CR -512 landscaping. Public Works Director James W. Davis explained that Phase 2 of CR -512 (the eastern 4,000 feet, just west of US -1) is currently under construction. County Engineer Roger Cain has been working with consultants to define the ultimateltypical section of CR -512 west of the Library. A document (preliminary alternative alignment) has just been transmitted which gets into what the actual road should look like. It is necessary now to determine the landscaping element, which involves the width of the median between the eastbound and westbound lanes. He asked that the Commissioners keep in mind that this is a 4 -lane improvement now that will be expandable to 6 lanes in the future. The intent is to install as much of the drainage infrastructure now, so that later the entire cross section of the right-of-way will not have to be re -worked The consultants are mandated by Florida Statutes to use the Florida DOT Uniform Minimum Design Requirements for Streets and Highways (DOT Green Book). He explained how clear zones are established and required under the Green Book. He detailed the differences in the types of roadway designs, a rural (non -curb and gutter) and urban (curb and gutter) and the choice will dictate the right-of-way needed. Director Davis pointed out that other considerations also need to be addressed, such as utility accommodations in the corridor. There is a 20 -inch water main down CR -512 which would end up being placed in the median. Anyone tapping into the water main would possibly have to trench across the median which might disturb the root structure of the trees in the future and also complicate utility maintenance and repair. Another consideration is that, if going with a rural section and expanding the median to 64 feet, there would be additional right-of-way acquisition needed. There are some areas where that will be very sensitive and also some constraints along some of the developed sections. The western part of CR -512 is basically undeveloped now. The design callsfor avoiding disturbing some of the oak canopy around the south prong of the Sebastian River. The roadway is being designed away from it. This particular corridor is much different from the SR -60 and CR -5 10 corridors because much of the property on the north side of the road will be preserved for government or recreational use. More development is likely to occur on the south side of the corridor where landscaping can be designed and be aesthetically pleasing. Curbing the median and introducing large oak trees there would probably inflate the cost of the job by $1-2 million. Director Davis explained that the next concern would be funding for the additional $1-2 million. Phase 1 of the CR -512 corridor was 100% funded with impact fee revenues. It is apparent that the cash flow in the impact fee account will accommodate Phase 2, but the initial estimates and impact fee formula did not include curbing and large tree landscaping in the median. An alternate means of funding would have to be a policy decision. Staffs recommendation is to enhance the corridor and right-of-way with softer vegetation, smaller 33 6o0K .�U'.O PAGEJ9L JO JULY 229 1997