An arborist report is a document that evaluates the potential impact of a proposed construction project on the health of an existing tree. An arborist report will be required when a proposed construction project is within proximity to a heritage tree, as defined by municipal code Chapter 13.24.
The report shall include the following:
- Coversheet
i. Date report was written.
ii. Name and address of property owner and/or representative when applicable.
iii. Site address
iv. Name of reporting arborist and ISA certification number and/or ASCA registration number.
v. Address, phone number and email address of reporting arborist
vi. State the purpose of the report.
- Site plan
i. Improvements (sewer, water, electrical, communications)
ii. Grading (excavation, cut and fill)
iii. Building footprint(s) accurately located
iv. Trees numbered, identified and accurately located
v. Driplines accurately plotted
vi. Indicate trees to be removed
vii. Indicate tree protection barriers or other tree protection measures
- Tree assessment and inventory chart
i. Trees identified by common and botanical name
ii. Trunk diameter measured at 4.5 feet above grade (multistem trunks measured directly below attachment)
iii. Canopy radius at its widest from base of tree.
iv. Tree height
v. Indicate whether a Heritage tree is to be preserved or removed
vi. Briefly evaluate the condition of each tree in terms of hazard, health and structure.
- Tree preservation plan
i. List trees to be preserved.
ii. Describe tree protection/preservation measures before, during and after construction
An on-site arborist is to be designated who will have the responsibility and authority to insure that the instructions for tree protection are properly executed. A copy of the agreement between the owner/contractor and the designated site arborist is to be included with the survey.
Anyone wanting to remove a heritage tree, or prune more than one-fourth of the canopy and/or roots, must apply for a city permit. The application includes a form to be completed by a certified arborist.