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marshes, ponds, bogs and similar areas. Regulated wetlands do not include those artificial wetlands <br /> intentionally created from nonwetland sites, including, but not limited to, irrigation and drainage <br /> ditches,grass-lined swales,canals,detention facilities,wastewater treatment facilities,farm ponds, and <br /> landscape amenities,or those wetlands created after July 1, 1990,that were unintentionally created as a <br /> result of the construction of a road,street,or highway. Wetlands created as mitigation and wetlands <br /> modified for approved land use activities shall be considered as regulated wetlands. For identifying and <br /> delineating regulated wetlands,the city shall use the Washington State Wetland Identification and <br /> Delineation Manual. <br /> "Wetlands,"for the purpose of inventory mapping, means lands transitional between terrestrial and <br /> aquatic systems where the water table is usually at or near the surface or the land is covered by shallow <br /> water.Wetlands must have one or more of the following three attributes: <br /> 1. At least periodically,the soil supports predominantly hydrophytes; <br /> 2. The substrate is predominantly undrained hydric soil; <br /> 3. The substrate is non soil and saturated with water at some time during the growing season of <br /> each year. <br /> Wetlands include all areas waterward from the wetland edge. Where the vegetation has been removed, <br /> or substantially altered,a wetland shall be determined by the presence or evidence of hydric or organic <br /> soils. <br /> "Wetland boundary" means,for the purposes of the calculation of the area of the wetland,the total <br /> extent of the wetland, both on-site and off-site. <br /> "Wetland class" means a description of vegetation habitat based on the predominant life forms that <br /> occupy a particular layer of vegetation and possess an aerial coverage of thirty percent or greater of the <br /> entire wetland.The basis for these descriptive classes is derived from the Wetlands Taxonomic <br /> Classification System of the United States Fish and Wildlife Service (Cowardin et al., 1979). <br /> "Wetland, contiguous" means wetland systems connected by hydric soils or a significant surface water <br /> connection. For purposes of this title,wetlands will not be considered contiguous if the only hydrologic <br /> connection is a category I, II or III stream,or if the wetlands had historically been connected but are now <br /> separated by a legal fill or culvert which is one hundred feet or more in length. <br /> "Wetland edge" means the line delineating the outer edge of a wetland established by using the <br /> Washington State Wetlands Identification and Delineation Manual (Ecology Publication No. 96-94, <br /> 1997). <br /> "Wetlands, emergent" means a regulated wetland that does not qualify as a forested wetland or a <br /> scrub-shrub wetland with at least thirty percent of the surface area covered by erect, rooted, <br /> herbaceous vegetation as the uppermost vegetative strata. <br /> "Wetlands, Estuarine" means a tidal fringe wetland found along the mouth of a river and influenced by <br /> tidal activity.Water flows and depths are controlled by tidal cycles in the adjacent ocean. Estuarine <br /> wetlands have a salinity higher than 0.5 parts per thousand. <br /> EMC Title 19.37 (Critical Areas) Page 80 <br />