RT Journal Article SR Electronic T1 Oak Tree Hazard Evaluation JF Arboriculture & Urban Forestry (AUF) JO JOA FD International Society of Arboriculture SP 177 OP 184 DO 10.48044/jauf.1989.039 VO 15 IS 8 A1 Gary W. Hickman A1 Janet Caprlle A1 Ed Perry YR 1989 UL http://auf.isa-arbor.com/content/15/8/177.abstract AB A practical system for evaluating hazardous landscape trees is an important element of any tree maintenance program. An evaluation system was developed in California for two species of native oaks, Quercus lobata and Quercus wislizenii. The system uses eleven separate components which can be grouped into the four larger categories of environment, structure, vigor and target. A Summary Rating (SR) is generated for each tree from component ratings using a database management computer program. The SR has been useful in prioritizing and scheduling corrective tree work. The evaluation system has now been implemented on 244 acres of oak parklands and has been adopted by other public agencies responsible for maintaining urban oaks.