(1) New or substantially altered structural flood hazard reduction measures, such as dikes, levees, berms and similar flood control structures, shall be consistent with basin-wide flood control strategies in the Stillaguamish River Comprehensive Flood Hazard Management Plan.

(2) New flood hazard reduction projects may be authorized only if it is determined that no other alternative to reduce flood hazard to existing development is feasible. The need for, and analysis of feasible alternatives to, structural improvements shall be documented through a geotechnical analysis.

(3) Locate, design and construct flood protection measures so as to protect and restore the natural character of the streamway, avoid the disruption of channel integrity and provide the maximum opportunity for natural floodway functions to take place, including placement of all flood protection measures such as dikes and levees landward of the streamway, including levee setbacks to allow for more natural function of channel migration zones, off channel habitat and associated wetlands directly interrelated and interdependence with the stream proper.

(4) Dikes, levees, berms and similar flood control structures shall be shaped and planted with vegetation that is as close as feasible to native natural grasses, shrubs and/or trees characteristic of natural riparian vegetation, while maintaining the integrity of flood control facilities.

(5) All flood protection measures shall be designed and constructed so that downstream flooding will not be increased and the integrity of downstream ecological functions will not be adversely affected, including disruption of natural drainage flows and stormwater runoff.

(6) Removal of materials from the river channel for flood management purposes may be allowed only as part of an adopted integrated flood control management program that demonstrates that other flood hazard reduction strategies would not be effective in the absence of gravel removal.

(7) Public access shall be dedicated and improved in all publicly financed or subsidized flood hazard reduction programs unless the criteria of SMC 17.150.025 for modification of public access requirements are met.

(8) New or expanding development or uses in the shoreline, including subdivision of land, that would likely require new structural flood control works within an active stream, channel migration zone, or floodway are prohibited.

(9) All flood control and floodproofing measures shall conform with Chapter 17.120 SMC, Critical Areas – Frequently Flooded Areas – Specific Standards.

(10) All applications for shoreline stabilization and flood protection measures shall include the following (at a minimum):