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Arboriculture Expert Witness John Bornsworth

John Bornsworth
PO Box 3106
Port Angeles WA 98362
phone: 360-819-3081
John Bornsworth, Owner and Consulting Arborist has a decade of progressive experience in the practice and management of Arboriculture, Horticulture, Restoration Ecology, Vegetation Management, Plant Pathology, and Mycology.

  • Member, American Society of Consulting Arborists
  • International Society of Arboriculture Certified Arborist
  • ISA Certified Municipal Specialist
  • Qualified Tree Risk Assessor
  • WSDA Licensed Commercial Applicator with aquatic, horticultural and right-of-way endorsements
  • WA Dept. of Ecology, Western Washington Wetlands Rating System Certificate
  • Graduate of the rigorous Community Tree Management Institute (CTMI). Hosted by Urban and Community Forestry programs in Oregon and Washington
  • Member, Society of Consulting Arborists
  • Member of the International Society of Arborists
  • Member of the Pacific Northwest Chapter of the ISA
  • Member of the Society of Municipal Arborists
  • Member of the Society of Ecological Restoration
Litigation Support - Mr. Bornsworth provides defensible plant appraisal for legal cases, insurance claims, and asset management. His appraisals methodology is defined by the 9th edition of the Plant Appraisal Guide published by the Council of Tree and Landscape Appraisers. The value derived from this can be used to establish loss and replacement costs.

Mr. Bornsworth has appraised single trees, improperly pruned trees, and numerous tree losses. He has also worked in multiple Timber Trespass cases and Illegal Logging cases.

View John Bornsworth's Consulting Profile.