Jerry Johnson Campground hazard tree evaluation, September 2003

Description

"Trees in and near camping sites, campground roads and other developed features of Jerry Johnson Campground were mapped and scored for damage, defect and hazard in September 2003. A total of 24 camping unit or other developed sites were assessed. 843 trees were examined, 25 of which were dead. Nearly all of the trees were mature and some were very large. Grand fir was the most abundant species constituting 88% of the trees examined. Douglas-fir, lodgepole pine and ponderosa pine were also present. Root disease was moderate to severe in 33% of the trees and stem decay was rated moderate to severe in 5% of trees. Wounding, mostly recent, was seen in 30% of trees. Monitoring or removal was recommended for trees according to the severity of their damage or defect, the likelihood that a damage or defect may lead to tree failure, and the probability that a failed tree or part of tree would strike a structure or an occupied site. Removal was recommended for 169 trees (145 live trees). They ranged from less than 8 inches d.b.h. to nearly 37 inches. Most were grand fir or Douglas-fir and most had severe root disease, often with bark beetle or ambrosia beetle infestation as well. A yearly walk-through exam is recommended for this campground with another full assessment in 5 years. The map and database we developed in this assessment should make re-assessment of these trees relatively easy. A vegetation management plan that includes regeneration of root disease resistant tree species is highly recommended. In should facilitate vegetation rehabilitation to compensate for continuing high rates of root disease-related tree removal."--Summary.

Subjects

Series Statement

• Forest health protection
• Report -- 04-02.
• Report (United States. Forest Service. Northern Region) -- no. 04-02.

Links

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