Understanding how and why trees fail can help us improve how we design our urban forests and better manage the risks involved. In this webinar, Eric North will draw on storm research to describe the impact of sidewalk construction on street tree growth, stability, and recovery, and share design considerations for sidewalks and street trees. Larry Costello will present an overview of the Western Chapter Tree Failure Database (formerly California Tree Failure Report Program), which provides genus and species "failure profiles" based on quantitative reports of mechanical failures of urban trees. He will also share tips on how to establish similar programs in other regions.

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