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IRC MAINTENANCE PROVISIONS <br />11 November 1986 <br />ii) Maintenance Provisions - Prior to any site plan <br />approval, the applicant shaTT provide Indian River County, <br />Treasure Coast Regional Planning Council and the Indian River <br />Mosquito Control District with an operation plan for future <br />maintenance of the estuarine waterway and rotary ditches. The <br />plan shall, at a minimum describe the methods for detritus <br />removal, responsibility for performing the work, marsh protection <br />practices during work activities in the marsh and channels and <br />the method for funding all maintenance activities. <br />OPERATION PLAN <br />Considerable attention has been given to the equipment and <br />methodologies to be employed in accomplishing the marsh <br />rehabilitation and creation work. The resulting system will be <br />predominantly high marsh interlaced with rather' broad waterways <br />resulting from pesticide laden silt and exotic removal. As <br />designed these water courses should be stable and not require any <br />significant maintenance work.. This is supported by the fact the <br />current, non -•tidally flushed ditches remain interconnected after <br />two decades without maintenance. Opening these water courses to <br />tidal flushing will, however, promote the establishment of <br />mangroves (reds, blacks and whites can be expected to volunteer <br />and thrive in some areas) that, in some cases, tend to reduce <br />circulation which could increase mosquito breeding potential if <br />not kept under control. Two techniques will be employed to <br />maintain circulation through the widened water courses. The <br />first will be the establishment of an ongoing program for hand <br />removal of mangrove seedlings from areas that are tending toward <br />undesirable proliferation. Removal can be accomplished year <br />round from john boats without the necessity of vehicle traffic <br />through the high marsh areas. These seedlings will be made <br />available for transplanting in other areas where their <br />establishment is desirable such as.the fringes of ,spoil islands <br />•in the Indian River Lagoon. <br />Detrital deposit and sedimentation is not expected to be a <br />problem in the circulation channels, especially if the mangroves <br />are prevented from taking over the shallow reaches possibly <br />preventing easy access to gambusia. Because of the stability of <br />the system design, no significant sedimentation of the <br />circulation channels is expected. Periodic export of detrital <br />material can be expected which will be beneficial to the lagoon <br />system. Due to unpredictable occurrences, however, some long <br />