Ord 2627 - TMC Chapter 18.44 "Shoreline Overlay" - Shoreline Uses and Update Zoning Regulations

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Section 19. TMC 18.44.040 is hereby reenacted to read as follows: 18.44.040 Shoreline Buffers Buffer widths. The following shoreline buffer widths apply in shoreline jurisdiction. Environment Shoreline Residential Urban Areas without Conservancy levees High Intensity Aquatic Buffer width (1)(2) Modification 50 feet OR the area needed to (3) achieve a slope no steeper than 2.5:1, measured from the toe of the bank to the top of the bank, plus 20 linear feet measured from the top of the bank landward, whichever is greater 100 feet (4) Areas with levees 125 feet 100 feet Not Applicable (5) (4) (1) Unless otherwise noted, all buffers are measured landward from the OHWM. (2) In any shoreline environment where an existing improved street or road runs parallel to the river through the buffer, the buffer ends on the river side of the edge of the improved right- of-way. (3) Removal of invasive species and replanting with native species of high habitat value is voluntary unless triggered by requirement for a Shoreline Substantial Development permit. (4) The Director may reduce the standard buffer on a case -by -case basis by up to 50% upon construction of the following cross section: (a) Reslope bank from toe to be no steeper than 3:1 in the Urban Conservancy Environment or reslope bank from OHWM (not toe) to be no steeper than 3:1 in the High Intensity Environment, using bioengineering techniques; and (b) Minimum 20-foot buffer landward from top of bank; and (c) Bank and remaining buffer to be planted with native species with high habitat value. Maximum slope is reduced due to measurement from OHWM and to recognize location in the Transition Zone where pronounced tidal influence makes work below OHWM difficult. Any buffer reduction proposal must demonstrate to the satisfaction of the Director that it will not result in direct, indirect or long-term adverse impacts to the river. In all cases a buffer enhancement plan must also be approved and implemented as a condition of the reduction. The plan must include using a variety of native vegetation that improves the functional attributes of the buffer and provides additional protection for the shoreline ecological functions. W: Legislative Development\SMP-Zoning Code changes 2-25-20 MD:bjs Review and analysis by Barbara Saxton Page 15 of 64