BLD2023-0623+Tree_Retention_or_Preservation_Plan+5.22.2023_2.04.36_PM+3560936SHOFFNER CONSULTING
1015 10th St. Mukilteo, WA 98275 Mobile: (206)755- 9407 tony@tonyshoffner.com
May 3, 2023
Duane Landsverk
Landsverk Quality Homes
24113 56th Ave W.
Mountlake Terrace. WA
98043
RE: Tree Inventory and Retention Report - 19515 94th PI. W. Edmonds, WA
Duane:
This report is provided to report on the inventory I conducted of the trees on the
property of the proposed re -development at the address of 19515 94th PI. W in the City
of Edmonds, WA. The accompanying tree inventory map shows the surveyed locations,
the tree numbers and the information on species and trunk dbh for the surveyed trees.
The inventory and this report are provided to address EMC 23.10.
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 and Proposed Development
The project site is currently developed with a single family residence. In total, there are
73 significant trees addressed in the inventory, 13 of which are off -site leaving 60 on the
property. Topography slopes downward to the west. Proposed development is to
redevelop the lot with a single family residence.
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
oberserved trees 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 (Dunster, Julian A., E. Thomas
Smiley, Nelda Matheny, and Sharon Lily. 2013. Tree Risk Assessment Manual.
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)
There are 60 significant trees on the property that are shown on the inventory map/
survey. All of the information specific to each tree is provided in the accompanying Tree
Evaluation Data spreadsheet.
In summary, the trees are in varying conditions. Most are in good condition and health,
others appear stressed with sparse crowns. As most exist as a stand, they provide
protection for each other and can be retained as proposed without creating a significant
risk to the house.
Following are photos of the trees showing their conditions and the site conditions:
0-44
The LODs are set based upon the following criteria:
• For trees with higher crowns where development can occur below the crown, the
LODs are set a location to protect the structural root plate for below ground
features. Above ground features can be within the LOD as no root disturbance
will result. For the larger trees, the recommended LODs are 16' from the trees.
• For small trees with low crowns, the LOD is set just beyond the edge of the drip
line in order to eliminate impacts to the crown. The recommended LOD distances
for trees with lower crowns is generally 2 feet beyond the drip line edge average.
This distance is also adequate to provide sufficient root protection and prevent
significant disturbance.
Because of the dense growing conditions, most of the trees have high crowns that will
allow for encroachment into the drip line without needing pruning. The specified LODs
are to provide distance between the ground disturbances and trees to limit root damage
and loss.
All of the retained trees are well out of range of any ground impacts, limiting root
damage and loss to minor, if at all.
5.0 Tree Retention, Replacement Required and Protection.
The City of Edmonds tree retention, protect and replacement requirements are specified
in chapter 23.10 Tree Related Regulations.
Tree Retention - The City of Edmonds requires retention of 30% of the significant
trees. At 60 significant trees, 18 trees are required to be retained.
The project proposes to retain 39 trees, exceeding 50% of the total
trees at 65% retention.
5.1 Tree Replacement
The proposed development plan proposes the removal of 21 trees. The project exceeds
50% retention at 65%, therefore, no tree replacement or fee in lieu payment is required.
5.2 Tree Protection Measures
The following tree protection measures are required by 23.10.070 of the ECDC:
Prior to development activity or initiating tree removal on the site, vegetated areas,
individual trees and soil to be preserved shall be protected from potentially damaging
activities pursuant to the following standards:
A. Preconstruction Meeting Required. Prior to the commencement of any permitted
clearing and grading activity, a preconstruction meeting shall be held on site with the
permittee and appropriate city staff. The project site shall be marked in the field as
follows:
1. The extent of clearing and grading to occur;
2. Delineation and protection of any critical areas and critical area buffers with clearing
limit fencing;
3. Flagging of trees to be removed and tags on trees to be retained; and
4. Property lines.
B. Placing Materials Near Trees. No person may conduct any activity within the
protected area of any tree designated to remain, including, but not limited to, operating
or parking equipment, placing solvents, storing building material or stockpiling any
materials, or dumping concrete washout or other chemicals. During construction, no
person shall attach any object to any tree designated for protection.
C. Protective Barrier. Before development, land clearing, grading, filling or any land
alteration, the applicant shall:
1. Erect and maintain readily visible temporary protective tree fencing along the limits of
disturbance which completely surrounds the protected area of all retained trees, groups
of trees, vegetation and native soil. Tree protective fencing shall be a minimum height of
three feet, visible and of durable construction; orange polyethylene laminar fencing is
acceptable.
2. Install highly visible signs spaced no further than 15 feet apart along the entirety of
the protective tree fencing. Said sign must be approved by the director and shall state,
at a minimum, "Tree and Soil Protection Area, Entrance Prohibited," and provide the city
phone number for code enforcement to report violations.
3. Prohibit excavation or compaction of soil or other potentially damaging activities
within the barriers; provided, that the director may allow such activities approved by a
qualified professional and under the supervision of a qualified professional retained and
paid for by the applicant.
4. Maintain the protective barriers in place for the duration of the project until the
director authorizes their removal.
5. Ensure that any approved landscaping done in the protected zone subsequent to the
removal of the barriers shall be accomplished with machinery from outside the protected
zone or by hand.
6. In addition to the above, the director may require the following:
a. If equipment is authorized to operate within the protected zone, the soil and critical
root zone of a tree must be covered with mulch to a depth of at least six inches or with
plywood, steel plates or similar material in order to protect roots and soil from damage
caused by heavy equipment.
b. Minimize root damage by hand -excavating a two -foot -deep trench, at edge of critical
root zone, to cleanly sever the roots of trees to be retained. Never rip or shred roots with
heavy equipment.
c. Corrective pruning performed on protected trees in order to avoid damage from
machinery or building activity.
d. Maintenance of trees throughout construction period by watering and fertilizing.
D. Grade.
1. The grade shall not be elevated or reduced within the critical root zone of trees to be
preserved without the director's authorization based on recommendations from a
qualified professional. The director may allow coverage of up to one-half of the area of
the tree's critical root zone with light soils (no clay) to the minimum depth necessary to
carry out grading or landscaping plans, if it will not imperil the survival of the tree.
Aeration devices may be required to ensure the tree's survival.
2. If the grade adjacent to a preserved tree is raised such that it could slough or erode
into the tree's critical root zone, it shall be permanently stabilized to prevent soil erosion
and suffocation of the roots.
3. The applicant shall not install an impervious surface within the critical root zone of
any tree to be retained without the authorization of the director. The director may require
specific construction methods and/or use of aeration devices to ensure the tree's
survival and to minimize the potential for root -induced damage to the impervious
surface.
4. To the greatest extent practical, utility trenches shall be located outside of the critical
root zone of trees to be retained. The director may require that utilities be tunneled
under the roots of trees to be retained if the director determines that trenching would
significantly reduce the chances of the tree's survival.
5. Trees and other vegetation to be retained shall be protected from erosion and
sedimentation. Clearing operations shall be conducted so as to expose the smallest
practical area of soil to erosion for the least possible time. To control erosion, it is
encouraged that shrubs, ground cover and stumps be maintained on the individual lots,
where feasible.
6. The director may approve the use of alternative tree protection techniques if those
techniques provide an equal or greater degree of protection than the techniques listed in
this subsection.
E. Directional Felling. Directional felling of trees shall be used to avoid damage to trees
designated for retention.
F. Additional Requirements. The director may require additional tree protection
measures that are consistent with accepted urban forestry industry practices. [Ord.
4218 § 1 (Att. A), 2021 ].
The tree inventory map shows the approximate locations of the protection fencing.
Given the existing conditions and features to be retained, such as the driveway, placing
the protection fencing at the specified LODs for some of the trees will not be possible,
nor is it necessary. The main reason for protection fencing is to prevent mechanical
damage from occurring to the trees.
4.0 Use of This Report
This report is provided as a means of addressing the trees on the property of the
proposed SFR project at the address of 19515 94th PI. W. in the City of Edmonds, WA.
This report addresses only trees on this property and those just off -site with drip lines
that extend onto the property. 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,
is aS4�
Tony Shoffner
ISA Certified Arborist #PN-0909A
TRAQ
TREE EVALUATION
DATA Landsverk Quality Homes - Edmonds, WA May 3, 2022
Tree N
Location
Species
Dbh
CSD
Rating
LOD N
LOD S
LOD E
LOD W
Condition Notes
Status
Replacement
1
On site
Douglas fir (Pseudotsuga menziesii)
40"
44'
3
14'
14'
14'
14'
Somewhat sparse crown. Appears stressed.
Retain
N/A
2
On site
Douglas fir (Pseudotsuga menziesii)
32"
40'
3
14'
14'
14'
14'
Somewhat sparse crown. Appears stressed.
Retain
N/A
3
On site
Douglas fir (Pseudotsuga menziesii)
34"
40'
3
14'
14'
14'
14'
Somewhat sparse crown. Appears stressed.
Retain
N/A
4
On site
Douglas fir (Pseudotsuga menziesii)
34"
42'
3
14'
14'
14'
14'
Somewhat sparse crown. Appears stressed.
Retain
N/A
5
On site
Douglas fir (Pseudotsuga menziesii)
24"
36'
3
14'
14'
14'
14'
Somewhat sparse crown. Appears stressed.
Retain
N/A
6
On site
I Douglas fir (Pseudotsuga menziesii)
26"
36'
1 3
14'
14'
14'
14'
Somewhat sparse crown. Appears stressed.
Retain
N/A
7
On site
Douglas fir (Pseudotsuga menziesii)
16"
32'
3
14'
14'
14'
14'
Somewhat sparse crown. Appears stressed.
Retain
N/A
8
On site
Douglas fir (Pseudotsuga menziesii)
34"
42'
3
14'
14'
14'
14'
Somewhat sparse crown. Appears stressed.
Retain
N/A
9
On site
Douglas fir (Pseudotsuga menziesii)
40"
44'
3
14'
14'
14'
14'
Somewhat sparse crown. Appears stressed.
Retain
N/A
10
On site
Douglas fir (Pseudotsuga menziesii)
24"
34'
3
N/A
N/A
N/A
N/A
Somewhat sparse crown. Appears stressed.
Remove
N/A
11
On site
Western hemlock (Tsuga heterophylla)
24"
32'
4
N/A
N/A
N/A
N/A
Dead tree
Remove
N/A
12
Off site
Pacific madrone (Arbutus menziesii)
24"
54'
3
16'
16'
16'
16'
Good condition and health. Very nice specimen.
Retain
N/A
13
On site
Douglas fir (Pseudotsuga menziesii)
26"
36'
3
14'
14'
14'
14'
Somewhat sparse crown. Appears stressed.
Retain
N/A
14
On site
Douglas fir (Pseudotsuga menziesii)
26"
36'
3
14'
14'
14'
14'
Somewhat sparse crown. Appears stressed.
Retain
N/A
15
On site
Douglas fir (Pseudotsuga menziesii)
26"
38'
3
14'
14'
14'
14'
Somewhat sparse crown. Appears stressed.
Retain
N/A
16
Off site
Douglas fir (Pseudotsuga menziesii)
22"
36'
2
14'
14'
14'
14'
Generally good condition.
N/A
N/A
17
Off site
Douglas fir (Pseudotsuga menziesii)
22"
34'
2
14'
14'
14'
14'
Generally good condition.
N/A
N/A
18
Off site
Douglas fir (Pseudotsuga menziesii)
18"
32'
1
14'
14'
14'
14'
Good condition and health.
N/A
N/A
19
On site
Douglas fir (Pseudotsuga menziesii)
26"
38'
2
14'
14'
14'
14'
Generally good condition.
N/A
N/A
20
Off site
Douglas fir (Pseudotsuga menziesii)
18"
34'
1
14'
14'
14'
14'
Good condition and health.
N/A
N/A
21
Off site
Douglas fir (Pseudotsuga menziesii)
26"
34'
2
14'
14'
14'
14'
Generally good condition.
N/A
N/A
22
Off site
Douglas fir (Pseudotsuga menziesii)
24"
34'
2
14'
14'
14'
14'
Generally good condition.
N/A
N/A
23
Off site
Douglas fir (Pseudotsuga menziesii)
24"
36'
2
14'
14'
14'
14'
Generally good condition.
N/A
N/A
24
On site
Douglas fir (Pseudotsuga menziesii)
24"
36'
2
14'
14'
14'
14'
Generally good condition.
Retain
N/A
25
On site
Douglas fir (Pseudotsuga menziesii)
24"
36'
2
14'
14'
14'
14'
Generally good condition.
Retain
N/A
26
On site
Douglas fir (Pseudotsuga menziesii)
30"
38'
3
N/A
N/A
N/A
N/A
Somewhat sparse crown. Appears stressed.
Remove
N/A
27
On site
Douglas fir (Pseudotsuga menziesii)
36"
42'
3
14'
14'
14'
14'
Somewhat sparse crown. Appears stressed.
Retain
N/A
28
On site
Bigleaf maple (Acer macrophyllum)
20"
56'
2
14'
14'
14'
14'
Generally good condition.
Retain
N/A
29
On site
Douglas fir (Pseudotsuga menziesii)
22"
36'
2
14'
14'
14'
14'
Generally good condition.
Retain
N/A
30
On site
Douglas fir (Pseudotsuga menziesii)
24"
36'
2
14'
14'
14'
14'
Generally good condition.
Retain
N/A
31
On site
Douglas fir (Pseudotsuga menziesii)
14"
26'
1
14'
14'
14'
14'
Good condition and health.
Retain
N/A
32
Off site
Douglas fir (Pseudotsuga menziesii)
16"
30'
1
14'
14'
14'
14'
Good condition and health.
N/A
N/A
33
Off site
Douglas fir (Pseudotsuga menziesii)
22"
34'
2
14'
14'
14'
14'
Generally good condition.
N/A
N/A
34
Off site
Douglas fir (Pseudotsuga menziesii)
30"
40'
3
14'
14'
14'
14'
Somewhat sparse crown. Appears stressed.
N/A
N/A
35
On site
Douglas fir (Pseudotsuga menziesii)
26"
36'
2
14'
14'
14'
14'
Generally good condition.
N/A
N/A
36
On site
Douglas fir (Pseudotsuga menziesii)
16"
32'
1
14'
14'
14'
14'
Good condition and health.
Retain
N/A
37
On site
Douglas fir (Pseudotsuga menziesii)
24"
38'
2
14'
14'
14'
14'
Generally good condition.
Retain
N/A
38
On site
Douglas fir (Pseudotsuga menziesii)
24"
36'
2
N/A
N/A
N/A
N/A
Generally good condition.
Remove
N/A
39
On site
Douglas fir (Pseudotsuga menziesii)
24"
36'
2
N/A
N/A
N/A
N/A
Generally good condition.
Remove
N/A
40
On site
Douglas fir (Pseudotsuga menziesii)
28"
38'
2
N/A
N/A
N/A
N/A
Generally good condition.
Remove
N/A
41
On site
Douglas fir (Pseudotsuga menziesii)
30"
42'
3
N/A
N/A
N/A
N/A
Somewhat sparse crown. Appears stressed.
Remove
N/A
42
On site
Douglas fir (Pseudotsuga menziesii)
26"
36'
2
N/A
N/A
N/A
N/A
Generally good condition.
Remove
N/A
43
On site
Douglas fir (Pseudotsuga menziesii)
20"
32'
2
N/A
N/A
N/A
N/A
Generally good condition.
Remove
N/A
44
On site
Douglas fir (Pseudotsuga menziesii)
18"
32'
1
N/A
N/A
N/A
N/A
Good condition and health.
Remove
N/A
45
On site
Douglas fir (Pseudotsuga menziesii)
26"
38'
2
N/A
N/A
N/A
N/A
Generally good condition.
Remove
N/A
46
On site
Douglas fir (Pseudotsuga menziesii)
30"
44'
2
N/A
N/A
N/A
N/A
Generally good condition.
Remove
N/A
47
On site
Douglas fir (Pseudotsuga menziesii)
26"
36'
2
N/A
N/A
N/A
N/A
Generally good condition.
Remove
N/A
48
On site
Douglas fir (Pseudotsuga menziesii)
20"
36'
2
N/A
N/A
N/A
N/A
Generally good condition.
Remove
N/A
49
On site
Douglas fir (Pseudotsuga menziesii)
20"
34'
2
N/A
N/A
N/A
N/A
Generally good condition.
Remove
N/A
50
On site
Douglas fir (Pseudotsuga menziesii)
32"
38'
2
N/A
N/A
N/A
N/A
Generally good condition.
Remove
N/A
51
On site
Douglas fir (Pseudotsuga menziesii)
18"
36'
1
N/A
N/A
N/A
N/A
Good condition and health.
Remove
N/A
52
On site
Douglas fir (Pseudotsuga menziesii)
30"
34'
2
N/A
N/A
N/A
N/A
Generally good condition.
Remove
N/A
53
On site
Douglas fir (Pseudotsuga menziesii)
20"
36'
2
N/A
N/A
N/A
N/A
Generally good condition.
Remove
N/A
54
On site
Douglas fir (Pseudotsuga menziesii)
30"
38'
2
N/A
N/A
N/A
N/A
Generally good condition.
Remove
N/A
55
On site
Douglas fir (Pseudotsuga menziesii)
16"
36'
1
N/A
N/A
N/A
N/A
Good condition and health.
Remove
N/A
56
On site
Douglas fir (Pseudotsuga menziesii)
18"
32'
1
14'
14'
14'
14'
Good condition and health.
Retain
N/A
57
On site
Douglas fir (Pseudotsuga menziesii)
14"
28'
1
14'
14'
14'
14'
Good condition and health.
Retain
N/A
58
On site
Douglas fir (Pseudotsuga menziesii)
16"
34'
1
14'
14'
14'
14'
Good condition and health.
Retain
N/A
59
Off site
Douglas fir (Pseudotsuga menziesii)
22"
36'
2
14'
14'
14'
14'
Generally good condition.
N/A
N/A
60
On site
Douglas fir (Pseudotsuga menziesii)
26"
36'
2
14'
14'
14'
14'
Generally good condition.
Retain
N/A
61
On site
Douglas fir (Pseudotsuga menziesii)
24"
36'
2
14'
14'
14'
14'
Generally good condition.
Retain
N/A
62
On site
Douglas fir (Pseudotsuga menziesii)
26"
36'
2
14'
14'
14'
14'
Generally good condition.
Retain
N/A
63
On site
Western hemlock (Tsuga heterophylla)
12"
26'
1
14'
14'
14'
14'
Generally good condition.
Retain
N/A
64
On site
Douglas fir (Pseudotsuga menziesii)
26"
36'
2
14'
14'
14'
14'
Generally good condition.
Retain
N/A
65
On site
Douglas fir (Pseudotsuga menziesii)
24"
36'
2
14'
14'
14'
14'
1 Generally good condition.
Retain
N/A
66
On site
Douglas fir (Pseudotsuga menziesii)
24"
36'
2
14'
14'
14'
14'
Generally good condition.
Retain
N/A
67
On site
Douglas fir (Pseudotsuga menziesii)
36"
42'
3
14'
14'
14'
14'
Somewhat sparse crown. Appears stressed.
Retain
N/A
68
On site
Douglas fir (Pseudotsuga menziesii)
18"
34'
1
14'
14'
14'
14'
Good condition and health.
Retain
N/A
69
On site
Douglas fir (Pseudotsuga menziesii)
28"
36'
2
14'
14'
14'
14'
Generally good condition.
Retain
N/A
70
On site
Douglas fir (Pseudotsuga menziesii)
30"
40'
2
14'
14'
14'
14'
Generally good condition.
Retain
N/A
71
On site
Douglas fir (Pseudotsuga menziesii)
26"
1 36'
1 2
14'
14'
14'
14'
Generally good condition.
Retain
N/A
72
Off site
Douglas fir (Pseudotsuga menziesii)
18"
32'
1
14'
14'
14'
14'
Good condition and health.
N/A
N/A
73
Off site
Douglas fir (Pseudotsuga menziesii)
36"
44'
3
14'
14'
14'
14'
Somewhat sparse crown. Appears stressed.
N/A
N/A
Tree #f Tree number as assigned on tag
Species Species of tree
Dbh Trunk diameter inches at 54" height
CSD Crown spread diameter in feet
Rating Condition Rating: 1=Very good condition and health. No defects. Young and vigorous.
2=Generally good condition and health. May be minor defects. Older and less vigorous.
3=Fair condition and health. Defects and/or health concerns. Symptoms of stress / decline.
4=Poor condition and health. Major defects and significant health issues.
LOD - Specified limits of disturbance based upon tree size, height and crown spread
Condition Notes Notes on conditions specific to each tree if specific concerns over health or defects
Status Significant status
Replacement Number of trees required for replacement if removed.
No replacement required. Project retains >50% of the existing trees (64%).