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Draft Chapter 18.28 Tukwila Urban Center (TUC) District <br />7. Utility and Service Areas Utility easements and other similar areas between property lines and <br />curbing shall be landscaped and /or treated with dust and erosion control planting or surfacing such <br />as evergreens, groundcover, shrubs, trees, sod, or a combination of similar materials. In areas of <br />overhead transmission lines, no shrubs or trees over 20 feet at maturity will be allowed. <br />8. Street Trees in the Public Frontage <br />a. Street trees in the public frontage shall be planted to the following standards: <br />(1) 3.5 feet back from the face of the curb and with an approved root barrier installed on the curb <br />side. <br />(2) 5 feet from underground utility lines <br />(3) 10 feet from power poles <br />(4) 7.5 feet from driveways <br />(5) 3 ft from pad mounted transformers (except 10 feet in front for access) <br />(6) 4 feet from fire hydrants and connections. <br />b. When used, tree grates and landscaped tree wells shall be a minimum 36 square feet in size <br />(6'x6'). Grates must have easily adjustable tree openings so that sections of grate can be <br />removed incrementally as the tree matures. Tree well size may be adjusted to comply with ADA <br />standards on narrower sidewalks. Root barriers must be installed at curb face. <br />c. Trees shall not be planted in locations where they would obstruct existing or planned street or <br />site lighting while maintaining appropriate spacing and allowing for their size and spread at <br />maturity. <br />9. Maintenance <br />a. Any landscaping required by this chapter shall be retained and maintained by the property <br />owner for the life of the project in conformance with the intent of the approved landscape plan <br />and this chapter. Maintenance shall include keeping all planting areas free of weeds and trash <br />and replacing any unhealthy or dead plant materials. <br />b. No tree planted by a property owner or the City to fulfill landscape requirements, or any <br />existing tree, may be topped or removed without prior approval from the City. If a tree is <br />topped or removed without approval it shall be replaced with a new tree or trees that meet or <br />exceed the functional value of the removed tree within 120 days or the property owner will be <br />subject to code enforcement action per TMC 8.45. The Director will require replacement trees <br />and /or other plant materials to meet the intent of this chapter. Options at the Director's <br />discretion are to require replacement of the tree with a new tree of like species and diameter, <br />replace the tree with multiple smaller diameter trees of an appropriate species and /or require <br />an in lieu fee for off -site tree replacement. <br />ZADCD n Clerk's \PC Laserfiche Packet \5 -24 -12 PC Packet \FINAL PC BOOK2_5.18.12_clean.docx Page 54 5/18/2012 <br />W <br />