Previous Tree Clearance Drawings
The following Tree drawings have been superceded. They are provided as additional guidance for installation requirements that may no longer be used but encountered on location.
Gray Book: 5-109 Root Barrier
Customer Service: 503-823-7770
GENERAL INFORMATION: 503-823-7404
The following Tree drawings have been superceded. They are provided as additional guidance for installation requirements that may no longer be used but encountered on location.
Gray Book: 5-109 Root Barrier