23-105061-SU-Tree Inventory and Retention Report report- 11.15.2023Shoffner Consulting
1015 10th St. Mukilteo, WA 98275 Mobile:(206)755-9407 tony@tonyshoffner.com
October 16, 2023
Dmitriy Staroverov
DIMA Construction LLC
PO box 23031
Federal Way, WA
98093
RE: Tree Inventory and Retention Report - Parcel # 1521049153 Federal Way, WA.
Dmitriy:
This report is provided to address the recent inventory I conducted of the trees on the
property parcel #1521049153 next to the property at the address of 32257 39th Ave. S,
in Federal Way, WA. Please see the accompanying Tree Inventory Map showing the
surveyed locations of the inventoried trees for reference to this report.
1.0 Professional Experience and Credentials
Following is a summarization of my experience and credentials as a consulting arborist:
• Master of Science in Urban Horticulture from Center for Urban Horticulture,
University of Washington, 1996. Focus of study and thesis was nursery
production of Pacific madrone (Arbutus menziesii) and establishment into a
natrual/urban ecosystem.
• ISA Certified Arborist since 1996.
• Tree Risk Assessment Qualified since 2012.
• Consulting arborist, 1996-present.
• Wetland Biologist, 1996-1998
• Other related experience: City of Everett Urban Forestry, summers 1989-1992;
Natural Resource Management staff and Bellevue Botanical Garden staff, City of
Bellevue, 1996-1997.
2.0 Site Conditions
The property is located in a single family residence neighborhood. It is currently
undeveloped and heavily forested with native trees and shrubs. The eastern half of the
property is relatively flat. The western half of the property slopes downward to the west
to a wetland that continues off-site to the west.
3.0 Tree Inventory - Methods and Results
I conducted visual evaluations of all the trees according to ISA standards and based
upon many years conducting such evaluations on trees in the Pacific Northwest. I
conducted level 2 basic assessment of the trees, oberserveing them up close to inspect
conditions of the trunk and from afar to inspect conditions in the crowns. All
assessments were conducted according to the methods specified in the ISA Tree Risk
Assessment Manual and on nearly 22 years experience conducting such evaluations.
The investigations involved the gathering of the following information:
• Tree species
• Trunk diameter
• Crown spread diameter
• Location factors
• Health and condition notes (general level of vigor, defects, disease or
pest problems)
Information on the trees including number, location, species, trunk diameter, crown
spread diameter, condition and health, tree unit credit, status to be retained or
removed and tree unit credits retained is provided in the Tree Evaluation Data
spreadsheet.
In general, the trees are in good to generally good condition and health. The following
species were identified:
• Bigleaf maple (Acer macrophyllum)
• Black cottonwood (Populus trichocarpa)
• Douglas fir (Pseudotsuga menziesii)
• Red alder (Alnus rubra)
• Western hemlock (Tsuga heterophylla)
• Western red cedar (Thuja plicata)
The surveyed trees range in size from 6” to 48” trunk diameter.
4.0 Tree Retention and Protecton Required
The City of Federal Way tree regulations for trees on private properties are specified in
19.120 of the Federal Way Revised Code. Per table 19.120.130-1, the minimum tree
density for SF residential zones, the minimum density of tree unit density of 25 per acre.
This property measures exactly 2 acres requiring 50 tree unit credits. The proposed
development plan provides 154 tree unit credits.
Most of the retained trees are located within the NGPA so protection fencing will not be
necessary as the silt fencing placed between the development area and the NGPA will
prevent any impacts to the trees.
For the trees to be retained within the development area, protection fencing is to be
installed at the drip lines and is to be left in place throughout clearing, grading,
development and construction.
5.0 Use of This Report and Limitations
This report is provided to DIMA Construction, LLC to address the tree inventory for the
property of proposed development in the City of Federal Way, WA. This report
addresses only trees on this property and just off-site. There is no gurarantee that
retained trees will survive through construction, and as trees are dynamic and their
conditions can change rapidly due to environmental changes, Shoffner Consulting
cannot be held liable for the failure of any retained trees.
Cordially,
Tony Shoffner
ISA Certified Arborist #PN-0909A
TRAQ