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Tree Protection During Construction

June 6 @ 9:00 am - 2:30 pm
Instructor: Morgan Holen CEUs: 5.0 ALMTU / 5.0 B-M

This workshop has reached capacity. Select REGISTER NOW to join our waitlist. We will be in touch if a spot becomes available.

Trees are commonly damaged during construction and successful preservation requires special consideration. This comprehensive workshop explores strategies for managing trees during construction through all phases of development. Learn about:

  • The value of preserving existing trees with development;
  • The importance of the arborist’s role throughout project planning, design and construction;
  • Identifying trees that are suitable for preservation;
  • The possible ways trees may be affected by construction;
  • Tree protection measures and monitoring;
  • The use of alternative construction techniques to provide for tree protection; and
  • Addressing tree damage, risk potential and remedial treatments.

This workshop is suitable for arborists and professionals of all levels but is targeted to arborists with limited experience in offering consulting services related to tree preservation or construction monitoring, landscape architects who coordinate with project arborists or design with existing trees in mind, and municipal and agency staff members that review and enforce tree protection plans.

Includes an indoor presentation and outdoor exercise.


Location: The Gardens at Horticulture Centre of the Pacific, 505 Quayle Rd, Victoria, BC, V9E 2J7, Canada

9:00 – 10:30 (1.50 hours) Introduction – Planning for Tree Preservation

  • Value of preserving trees during site development.
  • Arborist’s roles throughout various phases of development.
  • Identifying trees that are suitable for preservation (includes large group exercise).

10:30 – 12:00 (1.50 hours) Construction Impacts and Tree Protection Measures

  • Common ways that trees are damaged by construction impacts.
  • Methods for determining root protection zones.
  • Common tree protection measures.
  • Scenario based small group exercise to identify root protection zones.

12:00 – 12:30 (0.50 hours) LUNCH BREAK

12:30 – 1:15 (.75 hours) Construction Impacts and Tree Protection Measures Continued

  • Common reasons for root protection zone encroachment.
  • Methods of providing soil protection.
  • Alternative construction techniques to allow encroachment within root protection zones.
  • Methods of conducting exploratory excavation.
  • Revisit small group exercise to discuss root protection zone alternatives.

1:15 – 1:45 (0.50 hours) Field Component

  • View examples of trees adjacent to construction
  • Discuss appropriate tree protection measures for each example
  • Evaluate protection measures recommended

1.45 – 2:30 (0.75 hours) Tree Protection Monitoring

  • Tree protection site inspections and documentation
  • Communicating with contractors
  • Assessing damage and risk potential
  • Remedial Treatments
  • Resources
  • Q&A


Morgan Holen is a fourth-generation forester with two degrees in forestry, a Bachelor of Science in Forest Management from the University of Washington and a Master of Environmental Management in Forestry, Forest Science and the Management of Forests for Conservation and Development from Yale University. She is an ISA Board Certified Master Arborist (PN-6145B) and Qualified Tree Risk Assessor, a member of the Society of American Foresters and the American Society of Consulting Arborists and a Director for the non-profit Oregon Community Trees. Morgan is the owner of Morgan Holen & Associates, LLC, a consulting arborist and urban forest management company based in Wilsonville, Oregon and has protected thousands of trees on development projects throughout the Portland Metropolitan region and beyond over the last 13 years. Morgan will share her expertise and project experiences to provide you with a thorough understanding of the arborist’s role in providing tree protection during all phases of development on construction sites.

Refund Policy

  • Cancellations made at least 10 days prior to the event will be refunded at 100%.
  • Cancellations made within 5-9 days of the event will be refunded at 75%.
  • Cancellations made within 1-4 days of the event will be refunded at 50%.
  • Refunds will not be made available for no-shows.

Late Registration

  • Participants are expected to enroll prior to the registration deadline.
  • Participants can register at the door of the event only if space is available. Individuals will need to pack their own lunch.
  • Late registration is possible on a space available basis. You can contact our office at (800) 335-4391. There may, or may not be, room available for those who show up without registering ahead of time for the workshop. We encourage you to register for the workshop in advance.

Allied Professionals are members of allied organizations. See our list of qualifying organizations.


The Gardens at HCP
505 Quayle Rd
Victoria, British Columbia V9E 2J7 Canada