PNW Tree Failure Database

Dylan Saito Dylan Saito
More articles by Dylan Saito.

We are proud to announce the launch of the second largest tree failure reporting database in the world! It has been some time since the International Tree Failure Database was released, that a region as vast and diverse as the PNW, has compiled data about tree failures. This is a collaboration of Chris Rippey (City of Seattle), Dylan Saito (City of Portland), and Jonathan Pywell (City of Corvallis). Just like raising a child, it takes a village. There are a handful of other arborists involved as data and program consultants, and hopefully more as we evolve and progress.

We have reached out to the PNW Chapter of the ISA (Alaska, Idaho, Washington, Oregon, and British Columbia) to create a public library of tree failure. This information will be used to provide a better understanding of regional tree failure, effects of climate change, and safer working practices for field arborists. It is the second largest chapter in the world, and the only chapter with an international region.

We have worked to create a simple app with Survey 123 at It takes 30 seconds or less to complete the tree failure survey! The data will be downloaded every month and placed into a results profile page to show species, tree part, weather, location, and decay fungus (if any). We hope to make the data qualified to place it into the International database (species profiles). A website will soon follow, and currently we have created a social media presence to make it available to a larger audience (@PNWTreeFailureReportProgram on Facebook).

Please take a look when you have time, and if you pull it up on your mobile device, it will give you an opportunity to place the survey app on your device so you may report failures on the go! I have it on my own personal device currently. Thanks for reading, and here’s to the future of tree failure reporting!

PNW Tree Failure Reporting Database Link