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Chapter 910 Shoreland Overlay District <br /> <br /> <br /> Page 910-17 <br />(1) Membership must be mandatory for each dwelling unit or site purchaser <br />and any successive purchasers; <br />(2) Each member must pay a pro rata share of the association's expenses, and <br />unpaid assessments can become liens on units or sites; <br />(3) Assessments must be adjustable to accommodate changing conditions; <br />and <br />(4) The association must be responsible for insurance, taxes, and <br />maintenance of all commonly owned property and facilities. <br />2. Open Space Requirements. <br /> Planned unit developments must contain open space meeting all of the following criteria: <br />a. At least fifty (50) percent of the total project area within the Shoreland District <br />must be preserved as open space; <br />b. Dwelling units or sites, road rights-of-way, or land covered by road surfaces, <br />parking areas, or structures, except water-oriented accessory structures or <br />facilities, are developed areas and shall not be included in the computation of <br />minimum open space; <br />c. Open space must include areas with physical characteristics unsuitable for <br />development in their natural state, and areas containing significant historic sites <br />or unplatted cemeteries; <br />d. Open space may include outdoor recreational facilities for use by owners of <br />dwelling units or sites, by guests staying in commercial dwelling units or sites, <br />and by the general public; <br />e. Open space may include subsurface sewage treatment systems if the use of the <br />space is restricted to avoid adverse impacts on the systems; <br />f. Open space must not include commercial facilities or uses, but may contain <br />water-oriented accessory structures or facilities; <br />g. The appearance of open space areas, including topography, vegetation, and <br />allowable uses, must be preserved by use of restrictive deed covenants, <br />permanent easements, public dedication and acceptance, or other equally <br />effective and permanent means; and <br />h. The shore impact zone, based on normal structure setbacks, must be included as <br />open space. For residential PUDs, at least fifty (50) percent of the shore impact <br />zone area of existing developments or at least seventy (70) percent of the shore <br />impact zone area of new developments must be preserved in its natural existing <br />state. For commercial PUDs, at least fifty (50) percent of the shore impact zone <br />must be preserved in its natural state. <br />3. Erosion Control and Storm Water Management. <br /> Erosion control, storm water management plans, and Best Management Practices must be <br />developed and the PUD must: <br />a. Be designed, and the construction managed, to minimize the likelihood of serious <br />erosion occurring either during or after construction. This must be accomplished <br />by limiting the amount and length of time of bare ground exposure. Temporary <br />ground covers, sediment entrapment facilities, vegetated buffer strips, or other <br />appropriate techniques must be used to minimize erosion impacts on surface