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Draft Chapter 18.28 Tukwila Urban Center (TUC) District <br />street right -of -way should be designed to be functional stormwater treatment facilities where <br />appropriate. <br />18.28.130 PUBLIC FRONTAGE <br />A. Regulations <br />1. Public Frontage standards establish a specific configuration of improvements that match the <br />configuration and design of new and existing thoroughfares. <br />2. Installation of new Public Frontage improvements, if required by 18.28.030.13 or constructed <br />voluntarily, shall be as specified by the Corridor Type's Public Frontage Standards along all parcel <br />frontages, except where the public frontage area already contains the required features. <br />3. In instances where existing public frontage areas already contain features that are sufficiently <br />similar to those required in the Plan, all or part of the required Public Frontage requirements may <br />be waived by the DCD Director. <br />4. In instances where new streets are required or constructed voluntarily that is, in instances where <br />there are no existing public frontage conditions the public frontage shall be configured as <br />specified by the Corridor Type's Public Frontage Standards, see Figures 3 -10. <br />5. The exact location of the new back -of- sidewalk may or may not coincide with the front property <br />line. As a result, newly installed Public Frontage improvements may be partially located on private <br />property. <br />6. Along Tukwila Pond, all public frontage improvements are measured from the pond property line. <br />7. Each block shall have no more than 40% of the same species of large, open -habit deciduous trees. <br />To provide optimum canopy cover for the streetscape, each block shall be planted with deciduous <br />trees at a maximum spacing of 30 feet on center. Spacing shall be a function of mature crown <br />spread, and may vary widely between species or cultivars. The trees shall have a minimum <br />branching width of 8 feet within 5 years and when mature shall be large broad canopy species <br />selected from the City's recommended Street Tree List established for each corridor. <br />8. Pedestrian -scale decorative street lighting shall be installed with a maximum spacing consistent <br />with recommendations of the Illuminating Engineering Society of America (IES). The light source <br />shall be located 12 to 14 feet above finished grade. Where vehicular lights are needed, vehicular <br />lighting should be located 20 to 25 feet above finished grade. <br />9. Where appropriate, special paving patterns should be used to emphasize the pedestrian realm <br />within the public frontage. The sidewalk shall include a 1 foot wide paved auto passenger landing <br />located along the curb where on street parking is present. <br />10. Street furnishings such as benches and trash receptacles shall be provided where appropriate. <br />B. Exceptions <br />W: \Long Range Projects \Southcenter Plan \Plan 2011 \Book 2 \FINAL PC BOOK26.12.12with markups.dou Page 29 6/21/2012 <br />33 <br />