HomeMy WebLinkAboutArborist_Report_17.01.25Lane & Associates
Landscape Architecture
13802 26`ft Avenue NW
Tulalip, WA 9827
425 885-2319
Arborist Report
Lane and Associates was contacted by Jim Howton and was asked to compile an `Arborist Report' for a
site located at the North East corner of ME 12th Street and Harrington Avenue N.E. within the City of
Renton.
Date of Field Examination: January 25th, 2017
This report encompasses all of the criteria set forth under City of Renton code section 4-4-130. The tree
retention requirement is 30% of significant trees.
Description
6 significant trees were identified and assessed on the property. These are comprised of a mix of native
species and planted ornamental species. According to City of Renton code, a significant tree is a "tree
with a caliper of at least six inches (6"), or an alder or cottonwood tree with a caliper of at least eight
inches (8"). Trees qualified as dangerous shall not be considered significant. Trees planted within the
most recent ten (10) years shall qualify as significant trees, regardless of the actual caliper."
Each tree in this report was visited. Tree diameters were measured by tape. Each tree was visually
examined for defects and vigor. The tree assessment procedure involves the examination of many
factors:
• The crown of the tree is examined for current vigor. This is comprised of inspecting the crown
(foliage, buds and branches) for color, density, form, and annual shoot growth, limb dieback and
disease. The percentage of live crown is estimated for coniferous species only and scored
appropriately.
• The bole or main stem of the tree is inspected for decay, which includes cavities, wounds,
fruiting bodies of decay (conks or mushrooms), seams, insects, bleeding, callus development, broken or
dead tops, structural defects and unnatural leans. Structural defects include crooks, forks with V-shaped
crotches, multiple attachments, and excessive sweep.
• The root collar and roots are inspected for the presence of decay, insects and/or damage, as well
as if they have been injured, undermined or exposed, or original grade has been altered.
A `viable' tree is "A significant tree that a qualified professional has determined to be in good health,
with a low risk of failure due to structural defects, is wind firm if isolated or remains as part of a grove,
and is a species that is suitable for its location. " Trees considered `non-viable' are trees that are in
poor condition due to disease, age related decline, have significant decay issues and/or cumulative
structural defects, which exacerbate failure potential.
Tree Retention Calculation
A total of 6 significant trees were identified on the subject property. Two of the significant trees are in
poor condition. These two non-viable trees were not included in the tree calculation.
Landmark trees and tree groves were prioritized when selecting trees for retention, per the City of
Renton tree
code 4-4-130.
Note: See `Tree Map'
Tree Calculation based on 4, healthy, viable, Significant trees
Viable Trees proposed for removal —1 (25%)
Viable Trees proposed for retention — 3 (75%)
Tree Type
Removal
Retained
Total
Landmark #
0
0
0
Landmark %
100%
100%
100%
Significant #
1
3
4
Significant %
25%
75%
100%
Total #
1
3
4
Total %
25%
75%
100%
Tree Replacement
Replacements trees are not required as more than 30% are being retained.
Submitted by:
Bruce Cameron Lane Landscape Architect
There is no warranty suggested for any of the trees subject to this report.
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