- Before any ground-disturbing activity starts, get a Tree Preservation Inspection done.
- Whether you choose the Prescriptive Path or Performance Path to protect your trees during construction, a Root Protection Zone must be set up.
Request a Tree Preservation Inspection
- Call the Request for Inspection and Inspection Results phone number (right side of this page under Contacts) to set up an inspection.
- Use the IRV code 507.
- An Urban Forestry Tree Inspector will come out to the site.
- They'll make sure root protection fencing is properly installed as marked on the site plans that are on-site.
- Inspections can be scheduled for either day or evening.
- Visit the related Request an Inspection webpage to learn how to set up an inspection.
Note: Request Field Issuance Remodel (FIR) permits by calling the Urban Forestry phone number at (503) 823 - 8733.
Post-Construction Tree Maintenance and Protection
- Remove the root protection zone barriers.
- Inspect the trees after you complete construction.
- Mulch, prune, irrigate, and fertilize as necessary.
- Mulch should not touch trunk.
- Keep a regular inspection schedule for three to five years after construction.
- This helps you to determine ongoing maintenance needs and possible changes in condition.
- Apply for a Removal Permit for trees that are in irreversible decline.
Protecting a Tree Throughout Its Lifetime
- Weed and mulch around trees to establish a grass-free area. Mulch should not touch the trunk.
- Keep mowers and weed trimmers away from tree trunks to avoid damage to the bark.
- Protect tree limbs and trunks from damage during home maintenance and repair projects.
- Avoid contaminating the soil with gasoline, paint, oil or paint thinner.
- Avoid soil compaction: do not drive, park, or pave over the root protection zone. Remember to expand the root protection zone as the tree grows.
A helpful guidebook Oregon State University put together on protecting trees during construction.