a. Credit for preservation of existing trees.
It is the policy of the City to promote the preservation of its healthy, mature tree
canopy. Healthy, mature trees that are preserved on-site shall count for the purposes of the
landscaping requirements, as follows:
1. Credits awarded. In place of all or a portion of required
landscaping and buffering, an applicant shall receive credit towards such requirements for the preservation of existing trees, as outlined in Table 39.03.017-1,
Credit for Preservation of Trees. 2. Quality of existing trees. Existing trees that are protected according to this Section count towards the planting requirements of this Article, provided that they are either on the approved plant list or established for at least five years and not on the prohibited plant list.
Table 39.03.017-1 Credit for Preservation of Trees |
|---|
Preserved Healthy Tree Unit of Measurement (use whichever column produces more credit) | |
|---|
Diameter at Breast Height | Tree Height | Credit |
|---|
At least 3.5 inches, but less than 5 inches | At least 10 ft., but less than 15 ft. | 1 tree |
At least 5 inches, but less than 7 inches | At least 15 ft., but less than 24 ft. | 2 trees |
At least 7 inches, but less than 9 inches | At least 24 ft., but less than 32 ft. | 3 trees |
At least 9 inches, but less than 11 inches | At least 32 ft., but less than 40 ft. | 4 trees |
11 inches or more | 40 ft. or more | 5 trees |
b. Application of tree preservation credit.
The tree preservation credit shall be applied towards the requirements for the area in which the tree is planted. If there are no requirements for that area, the credit applies in the following order of descending priority:
3. Bufferyard requirements, provided that the tree is located between the bufferyard to which the credit applies and the
building or use that is being buffered.
c. Tree preservation standards.
The following conditions shall be met in order for these tree credits to apply:
1. Each existing tree shall be in a healthy and growing condition;
2. During site preparation and construction, each existing tree shall be protected by the placement of a barrier around the area below the
drip line;
3. A minimum of 75 percent of the
drip line zone of a tree to be preserved shall be maintained as a permanent, landscaped area at grades existing prior to site
development unless special provisions are made for the protection and survival of the tree. Such special provisions, including, but not limited to, the use of permeable paving materials, shall be subject to the approval of the Director of Planning;
4. No part of the
drip line zone of trees to be preserved may be paved with concrete, asphalt, or other impervious material; and
5. Soil or other materials shall not be temporarily or permanently stored in locations that would cause suffocation of root systems of trees to be preserved.
d. Replacement of credited trees.
Should any tree for which credit is received under the provisions of this Section die or be removed at any time, the
owner shall, within 180 days, replace the tree. The
owner shall replace the tree with the number of credited trees (for example, if a nine-inch caliper existing tree dies, then the
owner shall replace the tree with four new trees). The replacement trees shall be of an equivalent species or a species that will obtain the same height, spread, and growth characteristics.
(Ordinance 2023-O0054 adopted 5/9/2023; Ordinance 2024-O0137 adopted 10/28/2024)