HomeMy WebLinkAboutAttachment A_Arborist ReportAvaya Trails, Attn: Brittney Davis.
The owners are pursuing the removal of four trees on the windward side of the main office building at
10930 SE 172nd, Renton, WA. The site is an apartment complex that has tree-lined streets with trees in
the 15-20’ tall size, 3 clumps of significantly larger Conifers (3-4 trees a piece), and a 15-20’ tall mix of
species around the remaining buildings. The main body of trees is located to the east on approximately
one-third of the property. There is a walking trail in this area, and at the very farthest eastern edge of
the property, ranging from 5-10’ on the southern edge out to 20-25’ on the northern edge, is a
designated wetland that is heavily wooded.
The trees proposed for removal are a 15” DBH Bigleaf Maple with decay at the stump collar, two
Douglas Firs measuring 28” and a Douglas Fir that has undergone inosculation with trunks of 27” and
32”.
The Fir trees to be removed have broken tops, as they are fully exposed to the winds and are tall enough
to catch the higher-velocity winds full force. The resultant loss of apical dominance in those now gone
topmost buds has led to overextended limbs with excessive end weight, which have and are failing. For
the Firs, crowding has also created deformed crowns with longer limbs growing out away from the
center of the grouping. This is exposing the individual trees to twisting movement and strain on the
trunks. For the tree that has experienced inosculation, one must consider the seam between the two
stems, which leaves an inherent weakness compared to a single, individually growing tree.
Respectfully Submitted,
Neal Baker
ArboristsNW LLC
ISA Cert. PN1075A
TRAQ ISA (Tree Risk Assessment Qualified)
1/4/26