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2016 Draft Landscaping Code <br />vi.At least four feet from fire hydrants and connections. <br />d. Planting and lighting plans shall be coordinated so that trees are not planted in <br />locations where they will obstruct existing or planned street or site lighting, while <br />maintaining appropriate spacing and allowing for their size and spread at maturity. <br />e. Planting plans shall consider the location of existing or planned signage to avoid <br />future conflicts with mature trees and landscapingl. <br />Commented [CL33]: New text to ensure sign location is <br />considered when landscaping plan is developed. Key Bank <br />[on <br />2. Tree grates. <br />TIB example of where this did not happen. <br />. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . <br />a. Tree grates are not encouraged, but when used, shall be designed Aso that sections of <br />Commented [CL34]: Text from 18.28.240 B. 8. C., except <br />grate can be removed incrementally as the tree matures and shall be designed to <br />first sentence revised based on meeting with Public Works <br />avoid accumulation of trash. <br />staff <br />b. When used, tree grates and landscaped tree wells shall be a minimum 36 square feet <br />in size (6' x 6'). Tree well size may be adjusted to comply with ADA standards on <br />narrower sidewalks. See TMC Section 18.52.070 A. 1., "Soil Preparation and <br />Planting," for structural soil requirements. Root barriers may be installed at the curb <br />face if structural soils are not used. <br />3. Maintenance and Pruning. <br />a. Street trees are subject to the planting, maintenance, and removal standards and <br />Best Management Practices (BMPs), as adopted by the International Society of <br />Arboriculture, as it now reads and as hereafter amended. Street trees planted prior to <br />the adoption of the most current tree planting standards shall be exempt from these <br />planting standards but are still subject to current removal and maintenance standardsL <br />Commented [CL35]: New text - City of Tigard Urban <br />b. Landscaping in the right of way shall be maintained by the abutting property owner(s) <br />Forestry Manual, pg. 2 -2. H. <br />unless maintenance has been accepted by the City. See TMC Section 11.20J1501 <br />. . . . . . . . .... . . ...... . . . ...... . . ... . . ... . . . . . . ... . . ... . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ... . . . . . . . . . . ..... . . ... ......................................... <br />-- Commented [CL36]: First sentence is from rmc <br />c. The following standards apply to street tree maintenancO: <br />11.20.150. <br />i. Street trees shall be maintained consistent with International Society of <br />Commented [CL37]: Items cAii. -vii. -are from city of <br />Arboriculture BMPs. <br />Tigard Urban Forestry Manual, p . 2 -3. <br />ii. Street trees shall be maintained in a manner that does not impede public <br />street or sidewalk traffic, consistent with the specifications in the Public <br />Works Infrastructure Design Manual, including: <br />a) Eight feet of clearance above public sidewalks; <br />b) 13 feet of clearance above public local and neighborhood streets; <br />c) 15 feet of clearance above public collector streets; and <br />d) 18 feet of clearance above public arterial streets. <br />iii. Street trees shall be maintained so as not to become a defective tree as <br />defined In TMC Section 18.06.XXX. <br />Commented [CL38]: The City currently uses the term <br />"hazardous tree" — however, the professional arborist <br />4. Trees planted in a median shall be appropriate for the planting environment and meet the <br />industry uses the term "defective tree" instead. The <br />following <br />definition will be revised to be called "defective tree', a <br />requirementsl: <br />a. Trees shall be consistent with previously approved median tree plans given space <br />more accurate term. <br />constraints for roots and branches at maturity. <br />Commented [CL39]: 4. a. and b. from City of Tigard <br />b. Median plantings shall provide adequate species diversity citywide and reasonable <br />Urban Forestry Manual, (D. 1 -2, pg. 4 -1). Remaining text <br />developed by staff. Currently there is no guidance on <br />resistance to pests and diseases. <br />landscaping in medians in the city's code. <br />c. Columnar trees may be considered for median plantings to avoid conflicts with <br />vehicles and utilities. <br />Page 8 of 19 11/2/2016 6:15 PM <br />W:\ \Long Range Projects \2016 Landscaping Code Update \Draft TMC Chapter 18.52- Advisory Committee Revisions -2 <br />16 <br />