BMP - Utility Tree Risk Assessment - 87

Glossary
acceptable risk: the degree of risk that is within the tolerance or threshold of the owner, manager, or controlling authority.
Advanced assessment (Level 3): an assessment performed to provide
detailed information about specific tree parts, defects, targets, or site conditions. Specialized equipment, data collection and analysis, and expertise
are usually required.
aerial inspection: inspection of parts of a tree not visible from the
ground, including the trunk, stems, and branches; aerial inspections may
include evaluation of internal decay.
aerial patrol: overflights of a utility right-of-way (ROW), large areas, or
individual trees to record the location of trees that are likely to fail and
cause harm.
Basic assessment (Level 2): detailed visual inspection of a tree and
surrounding site that may include the use of simple tools. It requires that
a tree risk assessor walk completely around the tree trunk, looking at the
site, aboveground roots, trunk, and branches.
bending moment: a turning, bending, or twisting force exerted by a
lever, defined as the force (acting perpendicular to the lever) multiplied by
the length of the lever.
consequences: effects or outcome of an event. In tree risk assessment,
consequences include personal injury, property damage, or disruption of
activities due to the event. There are two levels of consequences considered
in UTRA: 1) those directly associated with damage to utility infrastructure,
and 2) those that may occur as a result of damage to the utility system.
cracks: separation in wood fibers; narrow breaks or fissures in stems or
branches. If severe, may result in tree or branch failure.
decay: process of degradation by micro-organisms.

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BMP - Utility Tree Risk Assessment

Table of Contents for the Digital Edition of BMP - Utility Tree Risk Assessment

Table of Contents
BMP - Utility Tree Risk Assessment - Cover1
BMP - Utility Tree Risk Assessment - Cover2
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