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Basic Tree Appraisal
Focusing on the CTLA Trunk Formula Method, this workshop gives an overview of the appraisal process and provides an opportunity to practice in the field. Participants will review common mistakes and refine their craft as appraising arborists.
The first portion of the course is a lecture that discusses the four primary components of the formula: trunk area, species rating, location rating, and condition rating. Next, the error associated with each component is identified, and recommendations are given for reducing error. A substantial portion of the lecture focuses on the proper placement of the measuring tape on trees with trunk abnormalities.
The second half of the course is a field application of the concepts discussed in the lecture. Participants will divide into groups and appraise several trees. The class will reconvene and discuss the results.
9am: INTRODUCTION TO APPRAISALS
Uses for Appraisals
Approaches for Appraisals
Field Equipment for Appraisals
Introduction to Appraisals for Insurance and Law
Ethics in Appraisals
10:00-10:15am 15-minute BREAK
10:15am-12pm: TRUNK FORMULA METHOD
When to use this formula
Components of the formula
12pm-12:30pm: LUNCH BREAK (Lunch will be provided)
12:30pm – 2:45pm: FIELD WORKSHOP
Practical application of classroom topics
Group work - Measure and rate trees
Independently appraise trees
Discuss results as a group
2:45-3:00pm: 15-minute BREAK
Combine final results from each group
Discuss lessons learned from field workshop
4pm: CEUs sign-in
Terry Flanagan is a Board Certified Master Arborist as well as a Municipal Specialist and Tree Worker Specialist in Tree Climbing and Aerial Lift. He is also Tree Risk Assessment Qualified. Terry was one of the first to be BCMA certified and chaired the panel of experts that helped create the Tree Risk Assessment Qualification. He has been an instructor of the program since the beginning and serves as a mentor instructor for new instructors coming into the program. He also taught the Arboriculture class at Clackamas Community College for many years up until he assisted in creating a full degree program for Arboriculture at the college.
He is the principal at Teragan & Associates, Inc. created in 2000 offering consulting for every aspect of arboriculture including risk assessment, plant appraisal, tree development plans, plant and landscape management plans as well as diagnosis for plant decline.
He has served in many leadership roles for the local chapters and the International Society of Arboriculture (ISA) serving as its president in 2013/2014. He currently serves as the chair of the Tree Climbing Competition Series Committee (TCC SC) working to improve the Tree Climbing Series worldwide at the different levels of the competition.
James Komen is a Board Certified Master Arborist and Registered Consulting Arborist. He has been published in two academic journals, presented at the ASCA and ISA Annual Conferences, and taught and co-taught multi-day training courses on tree risk assessment and tree appraisal. High energy and excitement define his teaching philosophy. While concepts, terms, and definitions are clearly demarcated in class, he emphasizes not only getting the "right" answer, but providing adequate justification.
Refund & Cancellation 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.
Allied Professionals are members of allied organizations. See our list of qualifying organizations.