The Pacific Northwest Tree Failure Database was started in 2017 with the goal of creating a central location for the reporting of tree failures in the Pacific Northwest. The long term goal is to use these reports to build species profiles for the region. Ultimately it is our hope to encourage other regions of the country to create similar tools with compatible data fields so that national level comparisons can be made to determine how species fair across bio-regions. 

We worked with the California Tree Failure Report Program early on to select appropriate data fields which would reflect conditions which may have contributed to a failure. We hope that in the long term the International Tree Failure Database (which was taken off line in 2012) will be revived and that our work will contribute to a deeper and more precise understanding of how and why trees fail.

Please use the button on the right to report any significant tree failures which you observe. We hope that those reporting will take the time to submit reports to the best of their ability. Please only submit repots for trees you have observed and assessed in person. The quality of the data you enter directly effects the quality of the reports we are able to produce. If you have questions about species identification, decay organisms etc. please work with an arborist or forester in your area. If you have any questions or comments please contact us. 

The intent of the Pacific Northwest Tree Failure Database is to provide information on how trees have failed in the past. It is intended to serve as a repository for field collected data from trained tree work professionals. Tree Failure Profiles are intended to be used for background information only and should not be used as the sole source of information when conducting tree risk assessment. Every tree is unique in its site, condition, vitality, size, exposure, presence of defects, targets, and the occupancy rates of those targets. When assessing risk related to a tree, conduct an adequate tree risk assessment based on all current industry standards. 

Reports are posted on our Facebook page as well as in the Reports page of this web site. 

We would like to thank the California Tree Failure Report Program, The US Forest Service and the Pacific Northwest Chapter of the International Society of Arboriculture for their help in making the project a reality.