22.46.080 Street trees.
A. Trees listed in the recommended street tree list are required to be installed on all public streets. Exceptions from the recommended street tree list must be submitted by a landscape architect with a brief description of the tree type and proposed spacing and be approved by the zoning administrator.
B. Street trees shall be planted along street frontages at an average of twenty-five feet on center and a maximum distance between trees of forty feet on center.
C. Street trees shall be planted according to the guidelines outlined in this chapter.
D. Removal of street trees without approval of the zoning administrator is prohibited and may be subject to enforcement action. The zoning administrator may grant approval for removal of street trees when they are deemed hazardous, or other site constraints exist, such as a potential conflict with the location of utilities.
E. Street tree plantings on arterials shall be consistent in species and variety and of a type designated in the recommended street tree list.
F. The average spacing for street trees may be adjusted to allow for sight lines, utilities, traffic signs, light standards, driveways and other street appurtenances.
G. Trees adjacent to public streets that are not planted in a separated landscape strip shall be installed as follows:
1. Deciduous trees shall be planted at least four feet from the face of curb to center of tree in tree pits that measure four feet by four feet.
2. Coniferous trees shall be planted at least ten feet from curbs depending on species.
3. Trees shall have a clear trunk to a height of six feet above the ground.
H. Residential Street Trees in a Landscape Strip.
1. Residential street trees shall be planted in a minimum five-foot-wide landscape strip separated from the sidewalk. Where physical constraints exist (e.g., no landscape strip), street trees may be planted adjacent to the sidewalk or back of curb and at least five feet from edge of sidewalk or curb.
2. A minimum of one street tree is required for each lot and shall be placed on the lot or, if a landscape strip is required, in that landscape strip. If the lot is unable to accommodate required street trees, all street trees may be placed in a landscape strip.
3. The landscape strip shall be planted with grass, ground cover, or a variety of shrubs, ornamental grass, and ground cover.
4. Provided that it does not exceed a width of three feet, a stepping stone, walkway, or other means of traversing the planter strip from the street may be provided at each residence.
5. The zoning administrator may provide for departures where unique site features make it difficult to comply with the standard, such as when there is not enough room for required street trees. (Ord. 005/2019 § 10 (Exh. B))