4/27/1988 - Laserfiche WebLink

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Dr. Fischer believed that he has been creating excellent littoral zones in the lakes he has dug by having mounds in the middle of the lakes, etc. He was concerned that Mr. Kreitman's remark that there is no salt water intrusion in the southern portion of Florida was received with skepticism by the Commission. Jim Frazee, chief hydrologist with the St. Johns River Water Management District, wondered why we have a sand ridge if it is so totally useless. He felt the 25 -ft. requirement is a compromise position, and explained that the Water District uses it because it allows the county to have development, real estate lakes, and the borrow which is needed for many projects. He emphasized that the Water District is not a conservation agency, it is a management agency; it uses the 25 -ft. figure as a guideline. It is not a standard, and it is not set in stone. Lengthy discussion ensued about having all the larger mines permitted by the Water District and having the small mines with thresholds of 12 acres or less continue to have their permits reviewed by the County. Most everyone seemed to like that idea. Fred Mensing of Roseland questioned the 25 -ft. figure, and Mr. Frazee explained that you could dig a substantial pit especially in the Wabasso area with the cross sections there. Carol Fall, also with the St. Johns River Water Management District, explained that the Water District recommends a maximum of 12 feet for the overall depths of the lakes resulting from mining operations in order to prevent a condition at the bottom of the pond where there is no oxygen and which greatly reduces the stormwater treatment. Robert Keating, Director of Planning & Development, pointed out that these lakes are not for the purpose of stormwater basins since they have no outlet, but Ms. Fall explained that after a while some residential developers want to work these lakes into their stormwater run-off system. One of the things the Water 5 APR 27 198 BOO 7 �'$ lE 242