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Exhibit B <br />ORDINANCE Exhibit A - Page 41 of 55 <br />3. Type Np Stream. Those stream segments within the ordinary high water mark, including the <br />periodically inundated areas of their associated wetlands, that are perennial and are not Type S <br />or Type F streams. However, for the purpose of classification, Type Np streams include <br />intermittent dry portions of the channel below the uppermost point of perennial flow. If the <br />uppermost point of perennial flow cannot be identified with simple, nontechnical observations <br />(see Washington Forest Practices Board Manual, Section 23), then said point shall be <br />determined by a qualified professional selected or approved by the city. <br />4. Type Ns Stream. Those stream segments within the ordinary high water mark, including the <br />periodically inundated areas of their associated wetlands, that are not Type S, Type F, or Type <br />Np streams. These include seasonal streams in which surface flow is not present for at least <br />some portion of a year of normal rainfall that are not located downstream from any Type Np <br />stream segment. <br />B. Lakes. Silver Lake shall be protected as required by the shoreline master program. All other lakes <br />shall be subject to the regulations in this chapter. <br />19.37.170 STANDARD STREAM AND LAKE BUFFER REQUIREMENTS. <br />A. Standard Buffer Width. It is the goal of this chapter to preserve streams and their buffers in a natural <br />condition to the maximum extent possible. <br />1. Buffers shall be measured from the top of the upper bank or, if that cannot be determined, <br />from the ordinary high water mark as surveyed in the field. In braided channels and alluvial fans, <br />the top of the bank or ordinary high water mark shall be determined so as to include the entire <br />stream feature. <br />2. The standard buffer widths required by this chapter presume the existence of a relatively <br />intact native vegetated community including native tree cover, shrub understory and ground <br />cover. If the existing buffer is unvegetated, sparsely vegetated, or vegetated with invasive <br />species, the buffer width shall be increased as required by this section. <br />3. Except as otherwise provided by EMC 19.37.050, the following minimum buffers of native <br />vegetation shall apply to streams based upon stream classification: <br />Table 37.5: Stream Buffers <br />Stream Classification <br />(Type) <br /> <br />Standard Buffer: Intact Native <br />Vegetation <br />Standard Buffer: Unvegetated; Sparsely <br />Vegetated; or Vegetated with Invasive <br />Species <br />Type S 100 feet 150 feet <br />Type F 100 feet 150 feet