BMP - Utility Tree Risk Assessment - 20

horizontal distance between the tree and the overhead line(s)
when determining the limits of the zone of interest. Utility structure
heights may also be visually estimated based on standard, known
dimensions. Similarly, tree heights may be measured or visually
estimated using nearby utility structures or other structures of
known height or by an experienced assessor with a demonstrated
accuracy in height identification. In every case, minimum approach
distances (MAD), as specified by OSHA, shall be maintained when
taking measurements.
The primary limitation of a Basic assessment is that it includes only conditions that are detected from a visual and basic tactile, ground-based inspection on the day of the assessment. Internal defects that do not possess any
external cavity, belowground, or upper-crown conditions, as well as certain
types of decay, may be impossible to see or difficult to assess and may
remain undetected.

Level 3: Advanced Assessment

UTRA projects may make only limited use of Level 3-Advanced assessment
methods when defects or conditions are encountered, and when further
information is desired to validate the Basic risk rating. Advanced assessments
typically require approval by the utility vegetation manager for the additional
service. Specialized equipment, data collection and analysis, and/or expertise
are usually required for Advanced assessments. Therefore, these assessments
are generally more time intensive and expensive.

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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
BMP - Utility Tree Risk Assessment - i
BMP - Utility Tree Risk Assessment - ii
BMP - Utility Tree Risk Assessment - Table of Contents
BMP - Utility Tree Risk Assessment - iv
BMP - Utility Tree Risk Assessment - v
BMP - Utility Tree Risk Assessment - vi
BMP - Utility Tree Risk Assessment - vii
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BMP - Utility Tree Risk Assessment - ix
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BMP - Utility Tree Risk Assessment - Cover4
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