BOCC Exhibits A-E ECY Approved SMP-Code Amendments

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Kittitas County Board of County Commissioners Shoreline Master Program Adopting Ordinance Kittitas County Shoreline Master Program Exhibit D | March 2016 | Page 276 of 339 7. Hazard present (channel migration zone): If County maps indicate that a potential channel migration zone hazard exists on or adjacent to a proposed use or development site, the applicant shall either: a. Locate the proposal landward of the channel migration hazard area as indicated on the map; or b. Submit a channel migration zone study, prepared by a geologist, engineering geologist, or professional engineer licensed in the state of Washington with at least five (5) years of experience in analyzing channel response in the fluvial systems of the Pacific Northwest, that demonstrates the following: i. The parcel on which the development or use is proposed is effectively protected (disconnected) from channel movement due to the existence of permanent levees maintained by public agencies or infrastructure such as roads and bridges constructed and maintained by public agencies (not all roads and levees will be considered disconnection points); or ii. The proposed use or development site has minimal risk of channel migration during the next one hundred (100) years as indicated by the existing channel type, land cover (and low likelihood of future alterations in land cover); surficial geology, low soil erosion potential; lack of evidence of likely avulsion pathways (including areas upstream of, but proximate to, the site); low inundation frequency(ies). The assessment shall include a review of available data regarding historical channel locations at the site; identification of the site within a broader geomorphic reach of the river system, and the general characteristics of that reach; description of existing channel type, existing channel alterations and likelihood of future alterations with changes in land cover; surficial geology, soils and erosion potential; and geotechnical setbacks relating to erosion at the toe of adjacent slope(s). The approach to assessing local migration shall be generally equivalent to the methods detailed in “A Framework for Delineating Channel Migration Zones” (Ecology Publication # 03-06-027), or similar method approved or sanctioned by Ecology. 8. Based upon the results of the channel migration zone assessment, the Administrator may prohibit or limit use or development within a channel migration zone and/or require a buffer of undisturbed natural vegetation from the edge of the channel migration zone. 9. The Administrator may impose conditions on any new shoreline use and developments in a geologically hazardous area as needed to: a. Protect slope stability and minimize erosion, seismic, and/or landslide hazard risks; b. Maintain natural sediment and erosion processes that are integral to the health and sustainability of freshwater ecosystems; c. Minimize the potential for property damage related to seismic events, erosion and/or landslides; d. Minimize the need for structural shoreline stabilization in the future; e. Protect human health and safety; and f. Reduce public liabilities for damages associated with seismic events, erosion and/or landslides. 17B.05.020Q Frequently flooded areas – designation and mapping. 1. Designation and mapping: All lands classified as floodway or special flood hazard areas in the Federal Emergency Management Agency report titled “Flood Insurance Rate Maps and Flood Boundary and Floodway Maps” dated November 5, 1980, as now or hereafter amended are designated as frequently flooded areas. The report and maps are on file at Kittitas County. When base flood elevation data has not been provided in the report, the Administrator shall obtain, review, and reasonably utilize any base flood elevation and floodway data available from the Federal Emergency Management Agency, Washington