Trees shall be planted along both sides of all newly created, widened, or substantially improved public and private streets, and along public and private street frontages located within or adjacent to a commercial, industrial, institutional, public, quasi-public, or duplex or multifamily residential development, constructed after the effective date of this chapter, in accordance with the following standards:
(a) Spacing of street trees, on average, shall be 30 feet on center. For trees which have an exceptionally broad canopy form, the director may allow spacing greater than 30 feet on center. For trees which have a narrow canopy form, the director may require spacing of less than 30 feet on center. Generally, trees should be planted at least 10 feet from utility or light poles or fire hydrants, 20 feet from street corners, and 10 feet from driveways. The director may authorize irregular spacing to accommodate sight distance requirements for driveways or intersections or to avoid public infrastructure such as street lighting, utility poles or fire hydrants.
(b) Street trees shall be deciduous and have a caliper of at least one and three-quarters inches at the time of planting. The caliper of the street trees within a development may be averaged to meet the one and three-quarter-inch standard; provided, that no individual tree shall have a caliper of less than one and one-half inches.
(c) Street trees shall be high-branching with a canopy that starts at least six feet above finished grade, and have roots which will not break up sidewalks or roadbeds or invade utility lines. For areas without overhead power lines, tree types shall be planted which will achieve a minimum height of 30 feet at maturity.
(d) Street tree types shall be selected in accordance with the suggested plant list contained in Chapter
22.64 FMC. Tree types and locations shall take into consideration lighting requirements for streets, parking, and pedestrian circulation areas, and signage requirements. The tree type shall not bear fruit or release sticky substances.
(e) Where feasible, street trees shall be planted in the planter strip between the curb and sidewalk. If the sidewalk is located abutting the curb, street trees shall be planted within tree wells installed in the sidewalk and covered by grates; provided, that a minimum unobstructed sidewalk width of five feet is maintained and irrigation is provided to each tree. If insufficient space exists to maintain an unobstructed sidewalk width of five feet, or the planter strip is less than five feet in width, the street trees shall be planted behind the sidewalk at a distance not greater than 10 feet from the sidewalk. The director may require root deflectors or impose other planting specifications, if recommended by a professional landscape architect or arborist.
(f) Street trees shall be maintained by the adjacent property owner unless they are maintained by a homeowners' association, condominium owners' association, or similar association, or are part of a city maintenance program.
(g) Pruning of street trees shall be performed per the ANSI A300 standards so as to maintain the natural form of the tree, encourage vigorous growth to a mature spread and height, and avoid weakening the tree to create a hazard. Street trees shall not be topped, pollarded, or otherwise pruned in a manner contrary to these goals, unless there is no practicable alternative that would preserve essential utility services.
(Ord. 1246 § 17, 2000)