HomeMy WebLinkAboutFalcon Ridge Lift Station_Arborist CommentsFrom: Terrence J. Flatley
Sent: Monday, April 09, 2018 1:56 PM
To: Angelea Weihs
Cc: Michael A Benoit
Subject: Falcon Ridge Lift Station - Tree Review
Hi Angelea,
I have reviewed the Falcon Ridge Lift Station project (attachments) and there are several trees shown in
red indicated for removal. Those trees would not survive construction work and/or are in the way of
facilities to be built and should be removed.
There are two additional trees not shown in red that are almost on the silt fence line (red dot/dash line).
One is a 24-inch diameter Western redcedar tree (yellow highlight) and the other is an 18-inch diameter
Western redcedar tree (yellow highlight). The trees have metal tags on them: the 24” tree is #10196 and
the other is #10194.
These two trees should be included in the tree removal because they will be too close to the
construction (limits of construction shown to be even closer to these trees) and would suffer significant
damage to their root systems (Western redcedar has a medium tolerance to development impacts).
The 24 inch tree will be about 7 feet from the finished facility and the 18 inch tree will be 10 feet. Under
ideal tree protection, these trees would require 18 to 24 feet of tree protection over the root systems in
order to not significantly impact tree health.
There are other surrounding trees that could be impacted by this project and should be protected with a
combination of construction fencing kept in place for the life of the project until completed and signage
on the fencing. No equipment should go beyond the limits of construction shown on the plan.
Terry Flatley, Urban Forestry and Natural Resources Manager
Community Services Department – 6th Floor
1055 South Grady Way
Renton, WA 98057
425-430-6601
ISA Certified Arborist - Municipal Specialist