The Hazard Tree Prevention Webpage was created by the Pacific Northwest Chapter of the International Society of Arboriculture and the Oregon Department of Forestry with a grant from Oregon Emergency Management and the Federal Emergency Management Agency.

The Hazard Tree Prevention Webpage was written by Greg Paulson, retired Professor, Linn Benton Community College and Paul D. Ries, Urban Forester with the Oregon Department of Forestry. Additional support was provided by the USDA Forest Service Urban and Community Forestry Program and the International Society of Arboriculture.

The Hazard Tree Prevention Webpage

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Your tree should look like this...

Welcome to the Hazard Tree Prevention Webpage.
These educational modules will help you learn what it takes to keep the trees in your yard healthy, safe, and beautiful, and prevent them from becoming hazardous.

What is a hazardous tree?
It is a tree with a significant potential to fail and a target that might sustain injury or damage. Hazard trees are created through a variety of circumstances including human influences, disease, and weather. The trees in your landscape are an asset to your home. They increase the property value of your land, they clean the air that you breathe, they mitigate the pollution caused by the car you drive, they provide shade that can decrease your energy bills, and they make your home, neighborhood, and town a more attractive place to live. However, with neglect, improper care, and damaging construction work, your trees can become a liability instead of an asset. Fortunately, most hazard trees can be prevented through proper tree care. By properly planting the right trees in the right places, giving them proper arboricultural care, and protecting them from damage, the trees in your yard can provide many benefits for decades to come.

How can you prevent a tree in your yard from becoming hazardous?
Well, that is precisely what this webpage is all about. The following modules will help you keep your trees healthy, because healthy trees are better than hazardous trees.

  • Module 1: How to Prevent Hazard Trees
  • Module 2: How Trees Grow, Survive, and Thrive
  • Module 3: How to Properly Select and Plant A Tree
  • Module 4: How to Properly Prune & Maintain Trees
  • Module 5: How to Protect Trees During Construction
  • Module 6: Where to Find Out More Information About Trees

You can review each of these modules individually, or work through each one sequentially. When you have completed all six, you will have a great working knowledge about what it takes to keep trees healthy and what makes them turn hazardous. Thanks for stopping by the Hazard Tree Prevention Webpage.