RESUB 1-BLD2024-1018+Tree Inventory Iron Vista+9.6.2024_1.40.07_PM+4485340SHOFFNER CONSULTING
1015 10th St. Mukilteo, WA 98275 Mobile: (206)755- 9407 tony@tonyshoffner.com
September 7, 2022
Hannah Landsverk
Landsverk Quality Homes
24113 56th Ave W.
Mountlake Terrace. WA
98043
RE: Tree Inventory Report - Linton Short Plat, Edmonds, WA
Hannah:
BLD2024-1018
RESUB
Sep 06 2024
CITY OF EDMONDS
DEVELOPMENT SERVICES
DEPARTMENT
This report is provided to report on the inventory I conducted of the trees on the
property of the proposed Linton Short Plat in the City of Edmonds, WA. The
accompanying tree inventory map shows the 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 undeveloped but does have a small shed. In total, there are
50 significant trees on the property. Topography slopes downward to the west. Proposed
development is to divide the property into four lots and construct single family
residences on the lots.
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 50 significant trees on the property that are shown on the inventory map. All
of the information specific to each tree is provided in the accompanying Tree Evaluation
Data spreadsheet.
In summary, all of the trees are in very good to good condition and health and no
significant defects were noted.
4.0 Limits of Disturbance Discussion and Encroachment
The City of Edmonds requires Limits of Disturbance (LOD) be established as minimum
distance of protection for all retained trees on site and for those just off -site with
driplines that extend onto the property. Limits of development for each tree are provided
on the accompanying Tree Evaluation Data spreadsheet.
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 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. This distance is also adequate to
provide sufficient root protection and prevent significant disturbance.
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 50 significant trees, 15 trees are required to be retained.
The project proposes to retain 27 significant trees and removes 23
trees for 54% retention.
5.1 Tree Replacement
The proposed development plan proposes the removal of 23 trees. Replacement of
significant trees will be required as follows as required by ECDC 23.10.080
6"-10" One new tree
10.1 "-14" Two new trees
>14" Three new trees
Replacement for the removal of the 23 significant trees on the property requires 32
replacement trees, or its equivalent in fee in lieu.
Replacement trees shall primarily be native species and sized as follows:
Deciduous trees - 1 1/2" caliper
Evergreen trees - 6 feet tall
The site plans show the locations of the proposed replacement trees.
Replacement Tree Fee in Lieu:
A fee in lieu of tree replacement may be allowed, subject to approval by the director
after consideration of all other options. A tree replacement fee shall be required for each
replacement tree required but not planted on the application site or an off -site location.
1. The amount of the fee shall be $1,000 multiplied by the number of trees necessary to
satisfy the tree replacement requirements of this section and shall be deposited into the
city's tree fund.
2. The fee shall be paid to the city prior to the issuance of a tree removal permit or
associated development permit.
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 ].
4.0 Use of This Report
This report is provided as a means of addressing the trees on the property of the Linton
Short Plat project in the City of Edmonds, WA. This report addresses only trees on this
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,
Tony Shoffner
ISA Certified Arborist #PN-0909A
TRAQ
BLD2022-0926
TREE EVALUATION
DATA Landsverk Quality Homes, Linton - Edmonds,
WA March 2, 2022
Tree #
Location
Species
Dbh
CSD
Rating
LOD N
LOD S
LOD E
LOD W
Condition Notes
Status
Replacement
1
Lot D
Douglas fir (Pseudotsuga menziesii)
28
40
2
16
16
16
16
Generally good condition and health. Large and older. No defects.
Retain
N/A
2
Lot D
Douglas fir (Pseudotsuga menziesii)
22
34
2
16
16
16
16
Generally good condition and health. Large and older. No defects.
Retain
N/A
3
Lot D
Douglas fir (Pseudotsuga menziesii)
22
36
2
16
16
16
16
Generally good condition and health. Large and older. No defects.
Retain
N/A
4
Lot D
Douglas fir (Pseudotsuga menziesii)
24
36
2
16
16
16
16
Generally good condition and health. Large and older. No defects.
Retain
N/A
5
Lot D
Western red cedar (Thuja plicata)
22
32
2
16
16
16
16
Generally good condition and health. Large and older. No defects.
Retain
N/A
6
Lot D
Douglas fir (Pseudotsuga menziesii)
31
40
2
16
16
16
16
Generally good condition and health. Large and older. No defects.
Retain
N/A
7
Lot D
Douglas fir (Pseudotsuga menziesii)
17
32
1
16
16
16
16
Good condition and health. Young and vigorous.
Retain
N/A
8
Lot D
Douglas fir (Pseudotsuga menziesii)
31
42
2
16
16
16
16
Generally good condition and health. Large and older. No defects.
Retain
N/A
9
Lot D
Douglas fir (Pseudotsuga menziesii)
27
40
2
16
16
16
16
Generally good condition and health. Large and older. No defects.
Retain
N/A
10
Lot D
Western red cedar (Thuja plicata)
21
34
2
16
16
16
16
Generally good condition and health. Large and older. No defects.
Retain
N/A
11
Lot D
Western red cedar (Thuja plicata)
19
32
1
16
16
16
16
Good condition and health. Young and vigorous.
Retain
N/A
12
Lot D
Western red cedar (Thuja plicata)
19
34
1
16
16
16
16
Good condition and health. Young and vigorous.
Remove for grading
3
13
Lot D
Western red cedar (Thuja plicata)
23
34
2
16
16
16
16
Generally good condition and health. Large and older. No defects.
Remove for grading
3
14
Road
Western hemlock (Tsuga heterophylla)
9
14
1
10
10
10
10
Good condition and health. Young and vigorous.
Remove for grading
1
15
Road
Western hemlock (Tsuga heterophylla)
8
14
1
10
10
10
10
Good condition and health. Young and vigorous.
Remove for grading
1
16
Road
Western hemlock (Tsuga heterophylla)
8
14
1
10
10
10
10
Good condition and health. Young and vigorous.
Remove for grading
1
17
Lot C
Western hemlock (Tsuga heterophylla)
7
12
1
10
10
10
10
Good condition and health. Young and vigorous.
Remove for grading
1
18
Lot B
Western hemlock (Tsuga heterophylla)
8
12
1
10
10
10
10
Good condition and health. Young and vigorous.
Remove lot B plan
1
19
Lot C
Western hemlock (Tsuga heterophylla)
8
14
1
10
10
10
10
Good condition and health. Young and vigorous.
Remove for grading
1
20
Lot C
Douglas fir (Pseudotsuga menziesii)
8
14
1
10
10
10
10
Good condition and health. Young and vigorous.
Remove for grading
1
21
Lot C
Douglas fir (Pseudotsuga menziesii)
8
14
1
10
10
10
10
Good condition and health. Young and vigorous.
Remove Lot C plan
1
22
Lot C
Douglas fir (Pseudotsuga menziesii)
8
16
1
10
10
10
10
Good condition and health. Young and vigorous.
Remove Lot C plan
1
23
Lot C
Pacific madrone (Arbutus menziesii)
16
36
1
16
16
16
16
Good condition and health. Young and vigorous.
Remove Lot C plan
3
24
Lot C
Western red cedar (Thuja plicata)
45
44
2
16
16
16
16
Generally good condition and health. Large and older. No defects.
Remove Lot C plan
3
25
Lot C
Western red cedar (Thuja plicata)
16
28
1
16
16
16
16
Good condition and health. Young and vigorous.
Remove Lot C plan
3
26
Lot C
Western red cedar (Thuja plicata)
12
26
1
14
14
14
14
Good condition and health. Young and vigorous.
Remove Lot C plan
3
27
Lot C
Douglas fir (Pseudotsuga menziesii)
32
46
2
16
16
16
16
Generally good condition and health. Large and older. No defects.
Remove Lot C plan
3
28
Lot C
Bittercherry (Prunus emarginata)
8
24
1
14
14
14
14
Good condition and health. Young and vigorous.
Remove Lot C plan
1
29
Lot C
Bittercherry (Prunus emarginata)
8
22
1
14
14
14
14
Good condition and health. Young and vigorous.
Remove Lot C plan
1
30
Lot C
Western red cedar (Thuja plicata)
25
36
2
16
16
16
16
Generally good condition and health. Large and older. No defects.
Remove Lot C plan
3
31
Lot C
Western red cedar (Thuja plicata)
18
32
1
16
16
16
16
Good condition and health. Young and vigorous.
Remove Lot C plan
3
32
Lot C
Western red cedar (Thuja plicata)
10
24
1
14
14
14
14
Good condition and health. Young and vigorous.
Remove Lot C plan
1
33
Lot C
Western red cedar (Thuja plicata)
7
16
1
10
10
10
10
Good condition and health. Young and vigorous.
Remove Lot C plan
1
34
Lot B
Bigleaf maple (Acer macrophyllum)
8
18
1
10
10
10
10
Good condition and health. Young and vigorous.
Remove lot B plan
1
35
Off site
Western red cedar (Thuja plicata)
7
10
1
N/A
8
N/A
N/A
Good condition and health. Young and vigorous.
Retain
N/A
36
Lot B
Plum (Prunus domestica)
6
10
1
6
6
6
N/A
Good condition and health. Young and vigorous.
Retain
N/A
37
Lot B
Plum (Prunus domestica)
6
12
1
6
6
6
N/A
Good condition and health. Young and vigorous.
Retain
N/A
38
Lot B
Plum (Prunus domestica)
6
10
1
6
6
6
N/A
Good condition and health. Young and vigorous.
Retain
N/A
39
Lot B
Plum (Prunus domestica)
6
12
1
6
6
6
N/A
Good condition and health. Young and vigorous.
Retain
N/A
40
Lot B
Plum (Prunus domestica)
6
10
1
6
6
6
N/A
Good condition and health. Young and vigorous.
Retain
N/A
41
Lot B
Plum (Prunus domestica)
6
12
1
6
6
6
N/A
Good condition and health. Young and vigorous.
Retain
N/A
42
Lot B
Plum (Prunus domestica)
6
10
1
6
6
6
N/A
Good condition and health. Young and vigorous.
Retain
N/A
43
Lot B
Plum (Prunus domestica)
6
10
1
6
6
6
N/A
Good condition and health. Young and vigorous.
Retain
N/A
44
Lot B
Plum (Prunus domestica)
6
12
1
6
6
6
N/A
Good condition and health. Young and vigorous.
Retain
N/A
45
Lot B
Plum (Prunus domestica)
6
12
1
6
6
6
N/A
Good condition and health. Young and vigorous.
Retain
N/A
46
Lot B
Plum (Prunus domestica)
6
12
1
6
6
6
N/A
Good condition and health. Young and vigorous.
Retain
N/A
47
Lot B
Plum (Prunus domestica)
6
12
1
6
6
6
N/A
Good condition and health. Young and vigorous.
Retain
N/A
48
Lot C
Plum (Prunus domestica)
6
12
1
6
6
6
N/A
Good condition and health. Young and vigorous.
Retain
N/A
49
Lot C
Plum (Prunus domestica)
6
12
1
6
6
6
N/A
Good condition and health. Young and vigorous.
Retain
N/A
50
Lot C
Plum (Prunus domestica)
6
12
1
6
6
6
N/A
Good condition and health. Young and vigorous.
Retain
N/A
51
Lot C
Plum (Prunus domestica)
6
12
1
6
6
6
N/A
Good condition and health. Young and vigorous.
Retain
N/A
52
Off -site
Black cottonwood (Populus trichocarpa)
30
44
2
16
N/A
N/A
N/A
Generally good condition and health. Large and older. No defects.
Retain
N/A
Tree #
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.
RESUB
Mar 07 2023
CITY OF EDMONDS
DEVELOPMENTS-GES
DEPARTMENT
2=Generally good condition and health. Maybe 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.
SHOFFNER CONSULTING
1015 10th St. Mukilteo, WA 98275 Mobile: (206)755- 9407 tony@tonyshoffner.com
February 22, 2023
Joseph Rowett
Landsverk Quality Homes
24113 56th Ave W.
Mountlake Terrace. WA
98043
RE: Tree Protection Report - Iron Vista, Edmonds, WA
Joseph:
This report is provided to provide protection measures for retained trees on the property
of the Iron Vista plat, as well as a 30" dbh black cottonwood (52) just off -site to the south
and a 7" dbh western red cedar (35) just off -site to the north. This report is provided to
address the requirements of 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 Tree Impact Assessmet - Methods and Results
To conduct this impact assessment, I reviewed a marked up site plan showing the
locations of proposed utilities and associated ground disturbances. The plan does not
show grading for the lots, such as cuts and fills.
3.0 Limits of Disturbance Discussion and Encroachment
The City of Edmonds requires Limits of Disturbance (LOD) be established as minimum
distance of protection for all retained trees on site and for those just off -site with
driplines that extend onto the property. Limits of development for each tree are provided
on the accompanying Tree Evaluation Data spreadsheet.
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 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. This distance is also adequate to
provide sufficient root protection and prevent significant disturbance.
4.0 Tree Retention, Impact Assessment 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 50 significant trees, 15 trees are required to be retained.
The project proposes to retain 27 significant trees and removes 23
trees for 54% retention.
Following are the impacts proposed near the retained trees and assessments of these
impacts by tree numbers:
On - Site Trees
1 - 11 A utility ditch is proposed within the right-of-way just to the east of trees #1-4,
within their drip lines and specified LODs of 16 feet. There are no impacts within
the LODs of trees 5-11. This ditch also passes through the drip lines of two
trees just off -site to the north.
Depending upon the distance from the trees to the edge of the utility trench, the
degree of root damage could be minor or significant. These are all large trees
so root damage, even on just one side, could be a significant impact. I
recommend either maintaining a distance of 10 feet minimum between the trees
and the western edge of the trench, or if the trench needs to be closer, then I
recommend that air excavation is done within the drip lines of these trees in
order to eliminate or minimize root damage and loss. If air excavation is the
option, it will be important to have a pre construction meeting with the project
consulting arborist and the air excavation operator to discuss the approach so
as to not cause unnecessary damage to roots.
36 - 51 A storm pipe is proposed just to the east of these trees. These trees are all
young and small, therefore, are less susceptible to being significantly impacted
by root damage and loss. I recommend a minimum distance of 6 feet between
the trees and the western edge of the utility trench.
Off - Site Trees
35 This tree is located just off -site to the north, approximately 3 feet off -site.
Currently there are no impacts proposed within its drip line. The only potential
impacts would be grading. This is a yound and small and less likely to be
impacted by any impacts, however, western red cedars are sensitive to root
damage and loss at any age.
52 This tree is located just off -site to the south. It is a 30" dbh black cottonwood. A
utility line is proposed to run along the southern property line within the setback,
within this tree's drip line and LOD. Depending upon the distance from the tree
to the edge of the utility trench, the degree of root damage could be minor or
significant. This tree is large so root damage, even on just one side, could be a
significant impact. I recommend either maintaining a distance of 10 feet
minimum between the treesand the southern edge of the trench, or if the trench
needs to be closer, then I recommend that air excavation is done within the drip
lines of these trees in order to eliminate or minimize root damage and loss. If air
excavation is the option, it will be important to have a pre construction meeting
with the project consulting arborist and the air excavation operator to discuss
the approach so as to not cause unnecessary damage to roots.
5.0 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 ].
6.0 Use of This Report
This report is provided as a means of addressing the impacts to and protection
measures for retained trees on site and just off -site of the Iron Vista project in the City of
Edmonds, WA. This report addresses only trees on this 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,
Tony Shoffner
ISA Certified Arborist #PN-0909A
TRAQ