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b. Nonstructural measures, such as placing the proposed use or development further <br />from the shoreline, planting vegetation, or installing on-site drainage improvements, <br />are not feasible or not sufficient; and <br />c. The need to protect primary structures from damage due to erosion is demonstrated <br />through a geotechnical report that states damage was caused by natural processes, <br />such as stream processes or waves. <br />8. New structural stabilization for water-dependent development is permitted only if it can be <br />demonstrated that: <br />a. The erosion is not being caused by upland conditions, such as the loss of vegetation <br />and drainage; <br />b. Nonstructural measures, planting vegetation, or installing on-site drainage <br />improvements, are not feasible or not sufficient; and <br />c. The need to protect primary structures from damage due to erosion is demonstrated <br />through a geotechnical report. <br />9. New structural stabilization to protect projects for the restoration of ecological functions or <br />hazardous substance remediation projects is permitted only if it can be demonstrated that <br />nonstructural measures, planting vegetation, or installing on-site drainage improvements, <br />are not feasible or not sufficient. <br />10. An existing shoreline stabilization structure may be replaced with a similar structure if there <br />is a demonstrated need to protect primary uses or structures or public facilities from <br />erosion caused by stream undercutting or wave action. <br />11. Soft shoreline stabilization measures that provide restoration of shoreline ecological <br />functions may be permitted waterward of the OHWM, provided a geotechnical analysis <br />documents that alternative solutions are not feasible or do not provide sufficient <br />protection. <br />12. Replacement walls or bulkheads shall not encroach waterward of the OHWM or existing <br />structure unless the residence was occupied prior to January 1, 1992, and there are <br />overriding safety or environmental concerns. In such cases, the replacement structure shall <br />abut the existing shoreline stabilization structure. <br />13. All new, expanded, or replacement shoreline stabilization shall be permitted only if it can <br />be demonstrated that the erosion rate exceeds that which would normally occur in a <br />natural condition, that the measure does not interfere with fluvial hydrological and geo- <br />morphological processes normally acting in natural conditions, and that the proposed <br />measures will not result in a net loss of shoreline ecological functions. <br />14. For purposes of this Section, "replacement" means the construction of a new structure to <br />perform a shoreline stabilization function of an existing structure which can no longer <br />adequately serve its purpose. Additions to or increases in size of existing shoreline <br />stabilization measures shall be considered new structures. <br />15. Geotechnical reports that address the need to prevent potential damage to a primary <br />structure shall address the necessity for shoreline stabilization by estimating time frames <br />and rates of erosion and report on the urgency associated with the specific situation. Hard <br />armoring solutions should not be authorized except when a geotechnical report confirms <br />that there is a significant possibility that the primary structure will be damaged within three <br />(3) years as a result of shoreline erosion in the absence of hard armoring measures, or <br />where waiting until the need is that immediate, would foreclose the opportunity to use <br />measures that avoid impacts on ecological functions. Where the geotechnical report