18A.70.170 Street tree standards.
A. Applicability. This section applies to projects that require street trees in order to fulfill a landscaping standard, and to all projects that are installing street trees unrelated to other landscaping or street improvements.
B. Standards. All street trees shall meet the following standards:
1. A minimum of three (3) inches in diameter at the time of planting.
2. Street trees shall be located and placed within the street rights-of-way in accordance with the requirements of the City Engineer, unless otherwise permitted in subsection (B)(3) of this section.
3. Street trees may be planted within ten (10) feet of the right-of-way only if the right-of-way is insufficient to accommodate street trees, or if curbs, gutters and sidewalks already exist.
4. The adjoining property owner shall be responsible for all maintenance of street trees and landscaping in public rights-of-way.
5. Street trees shall be trimmed to maintain the street canopy and provide for public safety. Street trees cannot be removed without the prior approval of the City Engineer.
6. Trees planted within five (5) feet of public or private road pavement edge, curbing or sidewalk, or within parking areas shall be surrounded by a root control barrier. Root control barriers shall consist of galvanized metal or plastic sheets extending a minimum of two (2) feet below the finished grade of the surrounding surface.
7. All trees shall be double (2) staked for the first two (2) years.
8. All street trees shall be of a species approved by the Community and Economic Development Department. See Appendix 2, “Street Tree List”, of the December 2012 Puget Sound Partnership Low Impact Development Technical Guidance Manual for Puget Sound. [Ord. 726 § 2 (Exh. B), 2019.]