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M i M varying sizes; some are 1.10, 1.2, 1.15, 1.6 acres, but,are called "an acre and a quarter." She said in order to build a retention pond 43 pine trees would have to be removed, which would lower the elevation. She described all the trees growing on the property and asked whether an exception could not be provided for these lots in Vero Lake Estates. Commissioner Eggert asked how long it will take to make the exemption change from one-half acre to one acre. Director Keating said this issue will be discussed at the special meetings on November 20 and December 4. Chairman Bird asked whether there is any flexibility in the FEMA guidelines. Director Davis responded that the Board has the ability, in the FEMA guidelines, to not make that a mandatory provision.' The recommendation from FEMA is that we either require these structures to be up on pilings and reduce the fill or if the Board, after consideration, finds it should not be mandatory, then the flexibility is within the code. Staff is concerned about the cumulative effects in an area as large as Vero Lake Estates, 2600 acres, if there is a house built on every lot. The Professional Advisory Council along with staff have wrestled with this point and have come up with the one -acre threshold. If the Board feels a larger than one -acre threshold would be better for the community, that is the Board's choice. Roger Cain explained the logic behind the decision of the 1 - acre threshold. It has to do with the insurance wherein property damage, even in small amounts per parcel, over 2600 acres, could be - a large total outlay for an insurance carrier. Commissioner Scurlock asked what the result might be if the threshold were placed at one and a half acres. Director Keating said staff did a study of all subdivisions over a half acre that were in the flood plain and there were not that many. He felt if you went over an acre there would be more lots but not a substantial number. Director Davis said you don't have problems where the elevation is 20.to 25 feet, but the problems come when you push that water into the areas where there is three to ten feet of elevation; those are the people who will be affected. Commissioner Wheeler felt that adding three feet of fill to a 25 -foot elevation could not affect the situation that much. Chairman Bird felt the discussion is good but wondered if this issue needed a decision, or is it something that will be coming before the Board at a future time. 47 BOCK 04 FAUU I � NOV 0 51991 J