Workshop Descriptions

Advanced Tree Appraisal: Anchoring Appraisals with Multiple Methods

Most appraisal training is focused on a very narrow slice of the world of tree appraisal: the Trunk Formula Technique. This course explores other methods that can be used by tree appraisers and why.

The course begins with an explanation of the concept of anchoring and how to evaluate the reliability, accuracy, and precision of data points. It then gives an overview of all three approaches to appraisal: cost, market, and income. It dives in and explores methods of appraising partial loss, diminution of market value, percentage contribution, and net present value. Next, participants have an opportunity to reconcile the many possible methods as they are applied to a given assignment.

The last third of the class is a series of case studies that give participants the opportunity to practice applying the methods discussed in class and to then choose and defend their own final appraisal conclusion.

Advanced Tree Climbing Workshop

The Pacific Northwest Chapter and the Women’s Tree Climbing Workshop are excited work together to offer this Advanced Tree Climbing Skills Workshop. The workshop is open to people of any gender identification. The instructors are experienced at teaching climbers from many backgrounds.

This workshop is for climbers who are beyond the basics. Individuals shall be confident conducting the following skills before considering attending this event:

  • Identify and communicate PPE and climbing components
  • Installing their own climbing system
  • Move freely around a tree’s canopy
  • Limb walk further than a body’s length from the trunk of the tree
  • Advance your own climbing line while aloft
  • Ascend beyond 50’ in the canopy comfortably

Advanced Tree Risk Assessment

Tree risk assessment is an area of urban forest management that has evolved rapidly in the past decade. We have moved from simple hazard tree assessment concepts into a more sophisticated understanding of risk in general. With the introduction of the ISA’s Best Management Practices document for Tree Risk Assessment, and the Tree Risk Assessment Qualification (TRAQ), several new approaches and guidelines have been introduced. Within the field of tree risk assessment there are many techniques and concepts to master; from basic principles through to sophisticated diagnostic techniques.

This course will focus on Level Three advanced tree risk assessment, but will also link this to Levels One and Two to show when Level Three may be required, and how to relate it to other work.

This course will be delivered by Dr. Julian Dunster, the designer of the original Certified Tree Risk Assessor credential (TRACE) and author of the new ISA Tree Risk Assessment manual for the TRAQ course. The course will be of interest to anyone practicing tree risk assessment, and especially arborists already holding the Tree Risk Assessment Qualification.

Basic Tree Appraisal

Focusing on the CTLA Trunk Formula Technique (TFT), 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 primary components of TFT and a short history of the changes made from the 9th Edition to the 10th Edition of the Guide for Plant Appraisal. 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.

Common Fungi Affecting PNW Trees and Implications for Tree Risk Assessment

This course will be of use to anyone interested in tree diseases, and particularly anyone conducting risk assessment of trees with disease.

Arborists and foresters conducting tree risk assessments need to:

  1. Know what to look for, and
  2. Know what they are looking at.

Fungi affecting trees show considerable variability in form and their ability to cause decay. Part of that variability is driven by the species of tree and fungus, the age and vigor of the tree, the extent of the fungal attack and associated decay, and the ability of the tree to compartmentalize the invading pathogens. Understanding the CODIT process is integral to understanding where decay may be within the tree. Minimizing bark scaring from park or forest management activities reduces the creation of fungal infection courts that threaten long-term tree health.

Introduction to Tree Climbing

Introduction to Tree Climbing is a 2-day hands-on workshop designed for tree care professionals who want to learn or refresh the basic fundamentals, practice and safety protocols of tree access and climbing for arboricultural work. This course will teach those new to climbing the basic skills to be safe, efficient and productive out in the field. If students have personal climbing equipment they are encouraged to bring their gear to learn how to properly inspect the life support components. Emphasis on ANSI Z133 safety standards compliance will be an ongoing theme throughout the 2 day workshop to drive home the importance of safety.

ISA Tree Risk Assessment Qualification

The ISA Tree Risk Assessment Qualification (TRAQ) program provides an opportunity for professionals in the arboriculture industry to expand their knowledge through education and training in the fundamentals of tree risk assessment. This qualification promotes the safety of people and property by providing a standardized and systematic process for assessing tree risk. The results of a tree risk assessment can provide tree owners and risk managers with the information to make informed decisions to enhance tree benefits, health, and longevity.

ISA Tree Risk Assessment Qualification Renewal

The ISA Tree Risk Assessment Qualification (TRAQ) program provides an opportunity for professionals in the arboriculture industry to expand their knowledge through education and training in the fundamentals of tree risk assessment. This qualification promotes the safety of people and property by providing a standardized and systematic process for assessing tree risk. The results of a tree risk assessment can provide tree owners and risk managers with the information to make informed decisions to enhance tree benefits, health, and longevity. The Tree Risk Assessment Renewal workshop is a one-day refresher, with five hours of instruction, and three hours of take the exam. Current TRAQ holders can complete the abbreviated course as early as four years into their qualification.

Structural Support Systems – Cabling and Bracing

What is structural support and how does it affect tree health and longevity? The Structural Support Systems Workshop will be a 2 day workshop that is lecture based and hands-on. This workshop will cover the ANSI A300 Part 3 Supplemental Support Systems standards that are applied to the installation and maintenance of tree support systems, including cabling, bracing and guying. Various cabling approaches with be discussed such as bracing for split trees, through rods, and outside the box support systems. Static versus dynamic cabling systems will be compared, looking at where, when and why to install each system. Looking at structure support of weakened unions, wind dampening, and supporting abnormal growth structure, we will take a comprehensive approach at the purpose of cabling a tree and which system would likely be most successful. Cabling system construction and installation practices will be discussed to focus on the approach to find the most effective system to fit the tree.

Tree Growth & Development: What Arborists Need to Know

This course, taught by Tom Hinckley, UW Emeritus Professor of Woody Plant Physiology, will cover the basics of tree biology and how trees grow in response to their environment. Topics to be covered include meristems and their functions, growth patterns, tree responses to stress, tree competition and mortality, and how trees get water from roots to their canopies. The class includes a lecture plus hands-on examples with whole trees and tree parts from a range of circumstances and species. We will put current concepts of tree growth and development into a form that arborists can use in their work.

Women’s Tree Climbing Workshop

PNW-ISA has teamed up with the Women’s Tree Climbing Workshop to offer a fun, safe space to learn. No worries about looking silly or not being safe. This workshop is open to all women (18+), skills and ability levels.  Bring your tree climbing equipment (if you have any) and we’ll help you determine what’s safe to use for tree climbing. Don’t have equipment? We’ve got you covered. Taught by International Tree Climbing Championship competitors Bear LeVangie, Melissa LeVangie, with over 40 years of collective climbing experience, you know you’re in good hands.

You will learn about a multitude of styles in climbing equipment and techniques. Come network with women and female arborists from all over the Chapter! You will leave from this climbing experience with new skills, wonderful memories, new friends, and a sense of personal accomplishment. This workshop is limited to 30 participants. We will take a paid waitlist.