HomeMy WebLinkAboutEX05_Arborist_report LAYTON TREE CONSULTING, LLC
It’s all about trees……
PO BOX 572, SNOHOMISH, WA 98291-0572 * 425-220-5711 * bob@laytontreeconsulting.com
ARBORIST REPORT
2732 Aberdeen Avenue NE
Renton, WA
Report Prepared by:
Bob Layton
Registered Consulting Arborist #670
Certified Arborist #PN-2714A
October 1, 2021
EXHIBIT 5
RECEIVED
10/25/2021 BGillia
PLANNING DIVISION
DocuSign Envelope ID: 161A4F20-D494-466C-B2E0-C93C3D6DC51E
Arborist Report – 2732 Aberdeen AVE NE
Page 2 Layton Tree Consulting LLC October 1, 2021
Table of Contents
Assignment.................................................................................................................................................... 3
Description .................................................................................................................................................... 3
Methodology ................................................................................................................................................. 3
Judging Condition...................................................................................................................................... 3
Observations ................................................................................................................................................. 4
Discussion/Recommendations ...................................................................................................................... 4
Tree Density-Tree Replacement ................................................................................................................... 5
Arborist Disclosure Statement ...................................................................................................................... 6
Attachments
Photos, pages 7 - 9
Tree Plan Map
City of Renton – Approved Tree List
EXHIBIT 5
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Arborist Report – 2732 Aberdeen AVE NE
Page 3 Layton Tree Consulting LLC October 1, 2021
Assignment
Layton Tree Consulting, LLC was asked to compile an Arborist Report for one parcel in Renton. The
subject property is located at 2732 Aberdeen AVE NE. The purpose of the report is to satisfy City
requirements regarding tree retention regulations associated with the proposed redevelopment of the
property.
My assignment is to prepare a written report on present tree conditions, and to provide appropriate
recommendations for the protection of retained or protected trees during development.
This report covers all of the criteria set forth under the City of Renton’s tree regulations, Municipal Code
Section 4-4-130 - Tree Retention and Land Clearing Regulations.
Date of Field Examination: September 29, 2021
Description
There is only one existing significant tree on the subject property. A significant tree is any tree with a caliper
of at least 6-inches or alder or cottonwood tree at least 8-inches. This is a half-dead fruit tree that will be
removed.
There is a planted row of approximately 14 young to semi-mature Douglas fir trees adjacent to the south
property line. There are also three semi-mature Douglas fir trees and one birch tree in the street right-of-
way of Aberdeen Avenue NE. These trees are the subject of this report.
Methodology
Each tree in this report was visited. Tree diameters were measured by tape. The tree heights were
measured using a Spiegel Relaskop. Each tree was visually examined for defects and vigor. The tree
assessment procedure involves the examination of many factors:
• The crown or canopy of the tree is examined for current vigor/health by examining the foliage for
appropriate color and density, the vegetative buds for color and size, and the branches for structural
form and annual shoot growth; and the overall presence of limb dieback and/or any disease issues.
• The trunk or main stem of the tree is inspected for decay, which includes cavities, wounds, fruiting
bodies of decay (conks or mushrooms), seams, insect pests, bleeding or exudation of sap, callus
development, broken or dead tops, structural defects and unnatural leans. Structural defects can
include but are not limited to excessive or unnatural leans, crooks, forks with V-shaped crotches,
multiple attachments.
• The root collar and exposed surface roots are inspected for the presence of decay, insect damage, as
well as if they have been injured or wounded, undermined or exposed, or the original grade has
been altered.
Judging Condition
The three condition categories are described as follows:
EXHIBIT 5
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Page 4 Layton Tree Consulting LLC October 1, 2021
Good – free of significant structural defects, no disease concerns, minor pest issues, no significant root
issues, good structure/form with uniform crown or canopy, foliage of normal color and density, average or
normal vigor, will be wind firm if isolated or left as part of a grouping or grove of trees, suitable for its
location
Fair – minor to moderate structural defects not expected to contribute to a failure in near future, no disease
concerns, moderate pest issues, no significant root issues, asymmetric or unbalanced crown or canopy,
average or normal vigor, foliage of normal color, moderate foliage density, will be wind firm if left as part of
a grouping or grove of trees, cannot be isolated, suitable for its location
Poor – major structural defects expected to cause fail in near future, disease or significant pest concerns,
decline due to old age, significant root issues, asymmetric or unbalanced crown or canopy, sparse or
abnormally small foliage, poor vigor, not suitable for its location
Observations
Neighboring Trees
There is a planted row of approximately 14 young to semi-mature Douglas fir trees adjacent to the south
property line. These are located roughly two to four-feet off of the existing property line fence. Tree
diameters range between 8 and 24 inches with heights up to approximately 100-feet. Some have been
topped in the past. All are of good vigor with foliage of normal color and density. No concerning
defects were observed from the subject property side. These are all in fairly good condition.
Right-of-way Trees
There is a semi-mature Douglas fir off of the southwest property corner. It is located 9 ½-feet from the
edge of the existing concrete driveway. It has a forked top with codominant stems or tops. There is a
moderate buildup of included or embedded bark between the forked stems. It is protected from winds
by adjacent trees. Condition is rated as ‘fair’.
There are two semi-mature Douglas fir trees and two European white birch trees in the street right-of-
way. The Douglas fir trees are sound and in good condition. One of the birch trees is a dead snag. The
other birch tree is leaning onto the power lines.
Discussion/Recommendations
There is an existing concrete driveway in basically the same location as the proposed new driveway. The
new driveway shall be constructed at the same elevation or above to avoid damaging tree roots that are
likely to exist below it. There are also existing outbuildings close to the south property line on proposed
Lot B. These are on a concrete slab at grade. Again, the new driveway shall be constructed at the same
elevation or above as these slabs to avoid having to excavate and the potential for root damage. At the
far east end of new driveway where there are no existing improvements, only remove top sod layer to
establish gravel sub-base for the new driveway. Maintain the existing grades between the new
driveway and property line.
The storm drain utility needs to be moved to north side of access easement, outside of dripline areas.
Trenching at its current location would have substantial impacts on the neighboring trees.
EXHIBIT 5
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Arborist Report – 2732 Aberdeen AVE NE
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Tree locations are shown on the attached map. The driplines of trees have been delineated on the map,
as well as the recommended location of a tree protection barrier. Keep all equipment, materials, spoils,
etc. outside of tree protection areas.
Any roots encountered during work outside of the tree protection areas shall be pruned clean at sound
tissue prior to backfilling or finishing areas. Sound tissue is where the root is undamaged and the bark is
completely intact with the root. Any authorized work within dripline of retained and/or protected trees
shall be supervised by the project arborist in an effort to ensure impacts are kept as minimal as possible
or to acceptable levels.
There is a new sidewalk proposed within the driplines of the right-of-way trees. The existing grades at
the roadside are favorable for constructing the walk without having significant impacts on trees.
Redesign the walk to hug the street curb until outside of the dripline of the most northern tree.
Simply finish the landscape within the driplines of protected trees by cutting/hand-pulling any unwanted
vegetation, and applying a more attractive +/- 4-inch covering of organic mulch. Keep large plantings,
irrigation trenches and construction of hardscapes outside of the dripline areas.
Tree Density-Tree Replacement
Consult with your City planner on supplemental tree planting/landscape requirements.
Replacement trees shall be at least 2-inch caliper for deciduous species and 6-feet in height for
evergreen species. The City’s approved tree list is attached. Replacement tree species shall be chosen
from this list. Plant new trees in areas where they can fully mature without conflicting with new
improvements.
EXHIBIT 5
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Arborist Report – 2732 Aberdeen AVE NE
Page 6 Layton Tree Consulting LLC October 1, 2021
Arborist Disclosure Statement
Arborists are tree specialists who use their education, knowledge, training and experience to examine
and assess trees, recommend measures to enhance the beauty and health of trees, and attempt to
reduce the risks associated with living near trees. Clients may choose to accept or disregard the
recommendations of the arborist, or to seek additional advice.
Arborists cannot detect every condition that could possibly lead to the structural failure of a tree. Trees
are living organisms that grow, respond to their environment, mature, decline and sometimes fail in
ways we do not fully understand. Conditions are often hidden within trees and below ground.
Arborists cannot guarantee that a tree will be healthy and/or safe under all circumstances, or for a
specified period of time. Likewise, remedial treatments, like any medicine, cannot be guaranteed.
Treatment, pruning and removal of trees may involve considerations beyond the scope of the arborist’s
services such as property boundaries, property ownership, site lines, disputes between neighbors, and
other issues. Arborists cannot take such considerations into account unless complete and accurate
information is disclosed to the arborist. An arborist should then be expected to reasonably rely upon
the completeness and accuracy of the information provided.
Trees can be managed, but they cannot be controlled. To live near trees is to accept some degree of
risk. The only way to eliminate all risk associated with trees is to eliminate all trees.
EXHIBIT 5
DocuSign Envelope ID: 161A4F20-D494-466C-B2E0-C93C3D6DC51E
Arborist Report – 2732 Aberdeen AVE NE
Page 7 Layton Tree Consulting LLC October 1, 2021
Photo Documentation
Neighboring Douglas fir trees at west side of south property line
Neighboring Douglas fir trees at east side of south property line
EXHIBIT 5
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Arborist Report – 2732 Aberdeen AVE NE
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Looking west down south property line from southeast corner
Subject neighboring trees
EXHIBIT 5
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Arborist Report – 2732 Aberdeen AVE NE
Page 9 Layton Tree Consulting LLC October 1, 2021
Douglas fir in right-of-way off of southwest property corner
Trees in Aberdeen right-of-way
EXHIBIT 5
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EXHIBIT 5
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APPROVED TREE LIST – Small, Medium, and Large
H:\CED\Data\Forms-Templates\Self-Help Handouts\Planning\treeslist_march2010.doc P. 1
In the City of Renton there is an overabundance of maple and cherry species. According to the most recent street tree inventory, maples
currently comprise 35% and cherry 24% of all species. To reduce a catastrophic loss of species, experts agree that 10% o r less of any species
or cultivar exist within a street tree population. Because of this, planting maple or cherry trees within the right -of-way is discouraged.
SMALL TREES:
30 feet in height or less
Botanical name / Common Name
Mature
Height
in Feet
Mature
Spread
in Feet Fall Color Comments
Acer buergeranum / Trident Maple 20 20
yellow
orange
and red
Adaptable to urban environments. Decidiuous: prefers moist, well-drained soils:
tolerates infertile sites. Drought tolerant.
Acer campestre / Hedge Maple 30 30 yellow
Deciduous; prefers moist, rich soils; slow growing tree tolerant of air pollution
and soil compaction; yellow fall color; cultivars available including Queen
Elizabeth maple (‘Evelyn’) with dark green, glossy foliage.
Acer circinatum / Vine Maple 20-25 10
orange
and red
Deciduous; prefers moist, well-drained soils; tolerates seasonal saturation and
varying soil types; drought tolerant once established; bushy shrub or small tree;
most often multi-trunked and does well in small groups; white flowers April-
June.
Acer ginnala 'Flame' / Amur Maple 20 20 red
Deciduous; prefers moist, well-drained soils, but is tolerant of drought; is often
multi-trunked, but can be pruned to a single stem; rounded form; fragrant,
yellowish-white flowers in spring; cultivars are available such as ‘Flame’ and
‘Embers’ with differing fall colors. Select or prune for single stem; can be multi-
trunked.
Acer grandidentatum 'Schmidt' / Rocky Mt.
Glow Maple 25+ 15 intense
Acer griseum / Paperback Maple 25 20 scarlet
Deciduous; prefers moist, well-drained soils, but is moderately drought tolerant;
bronze peeling bark provides year-round visual interest; often multitrunked, but
can be trained to a single stem; slow growing; disease and pest resistant.
Smooth, peeling, cinnamon colored bark.
EXHIBIT 5
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APPROVED TREE LIST – Small, Medium, and Large
H:\CED\Data\Forms-Templates\Self-Help Handouts\Planning\treeslist_march2010.doc P. 2
Botanical name / Common Name
Mature
Height
in Feet
Mature
Spread
in Feet Fall Color Comments
Acer palmatum / Japanese Maple 20 24
yellow,
orange,
red
Prefers moist, well-drained soils; deciduous; slow to moderate growth rate;
multi-trunked with spreading branches; intolerant of inundation but moderately
drought resistant; vibrant fall colors; many cultivars available including ‘Emperor
I’, ‘Katsura’, and ‘Osakazuki’. Hundreds of varied cultivars. Can be slow growing.
Acer saccharum 'Apollo' 25 10
yellow,
orange Prefers well drained soils, but grows in varying soils; hearty.
Acer platanoides 'Globosum' / Globe
Norway Maple 20 18 yellow
Moist soils preferred, but tolerates drought and seasonal inundation; tolerant of
urban pollution; dense, compact, round form; slow-growing deciduous tree with
brilliant fall color; shallow root system may make mowing under the tree slightly
difficult; good selection for locations under power lines; another cultivar well
suited for such a location is A. platanoides ‘Almira,’ reaching only 20-25 ft.
Rounded top, and compact growth.
Acer truncatum / Purpleblow maple 20-25 20-25
Prefers moist, well-drained soil, but drought tolerant; very cold hardy deciduous
tree; moderate growth rate; yellow flowers in spring; an additional maple
cultivar of interest is 'Pacific sunset'.
Acer truncatum x A. platanoides 'Warren's
Red' / Pacific Sunset 30 25
yellow-
orange/
red
Acer Triflorum - Roughbark maple 25-30 20-25
apricot,
gold
Deciduous; prefers moist soils, but somewhat drought tolerant once established;
rough, knobby trunk provides interest in winter; disease and pest resistant; non-
aggressive roots do not damage sidewalks or driveways.
Amelanchier grandiflora 'Princess Diana' 20 15 bright red Good for limited space.
Amelanchier x grandiflora 'Autumn
Brilliance' Serviceberry 20 15
red or
yellow
Moist to dry, well-drained soils; small tree; drought tolerant; white clustered
flowers in spring; also try 'Princess Diana' for bright red fall color and the slightly
taller 'Robin Hill' (20-30 feet). Reliable bloom.
Amelanchier laevis ' lustre' / Luster
Serviceberry 25 25
red or
yellow
Moist to dry, well-drained soils; small tree; drought tolerant; white clustered
flowers in spring.
EXHIBIT 5
DocuSign Envelope ID: 161A4F20-D494-466C-B2E0-C93C3D6DC51E
APPROVED TREE LIST – Small, Medium, and Large
H:\CED\Data\Forms-Templates\Self-Help Handouts\Planning\treeslist_march2010.doc P. 3
Botanical name / Common Name
Mature
Height
in Feet
Mature
Spread
in Feet Fall Color Comments
Arbutus 'Marina' 25 15 evergreen
Good substitute for Pacific Madrone. May exceed 25' height under some site
conditions.
Carpinus caroliniana / American hornbeam 20-30 20-20
Deciduous; prefers moist, rich soils; grows near saturated areas but is only
weakly tolerant of saturation; blooms March-May; slow growing; deep coarse
laterally spreading roots; medium life span; also consider Carpinus japonica
(Japanese hornbeam).
Cercis canadensis / Eastern Redbud 25 30 yellow
Deciduous; prefers moist, rich soils; tolerant of shade; somewhat drought
resistant, but not in full sun; purple-lavender flowers; medium longevity; often
multi-trunked; shallow, fibrous roots become deeper on drier sites; fairly short-
lived; blooms March-May. Blooms before leaves are out.
Cornus kousa 'Chinensis' / Chinese Kousa
Dogwood 20 20
reddish to
scarlet
Prefers moist soils; tolerant of varying soil types; moderate growth rate;
deciduous; white flowers in June and large red fruits that resemble a raspberry
in September; red to maroon fall color; more disease resistant than other
dogwoods; many additional cultivars available. Most resistant to disease of the
dogwoods.
Crataegus crus-galli 'Inermis' / Thornless
Cockspur Hawthorn 25 30
orange to
scarlet Red persistent fruit.
Crataegus x lavalii / Lavalle Hawthorne 28 20
bronze,
coppery
red
Deciduous; prefers moist, well-drained soil, but tolerant of varying soil types;
white flowers in spring; fruit can be a bit messy. Thorns on younger trees.
Crataegus phaenopyrum / Washington
Hawthorn 25 20 scarlet Thorny.
Fraxinus pennsylvanica 'Johnson' /
Leprechaun Ash 18 16 yellow
Prefers moist, well-drained soils; deciduous: slow to moderate growth rate;
tolerant of inundation but moderately drought resistant. A miniature in every
way.
Magnolia x loebneri 20 20 yellow Several cultivars.
Magnolia grandiflora 'Little Gem' 15 10 evergreen Useful where larger varieties are inappropriate.
Magnolia grandiflora 'Victoria' 25 20 evergreen
EXHIBIT 5
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APPROVED TREE LIST – Small, Medium, and Large
H:\CED\Data\Forms-Templates\Self-Help Handouts\Planning\treeslist_march2010.doc P. 4
Botanical name / Common Name
Mature
Height
in Feet
Mature
Spread
in Feet Fall Color Comments
Malus spp. / Flowering crabapple 15-25 6-15
Selection should be based on disease resistance to apple scab and fireblight.
Tolerant of prolonged soil saturation; short lived; tolerant of drought and
seasonally saturated soils; deciduous; white or faintly pink flowers in spring;
numerous Malus species and cultivars provide a variety of foliage and flower
colors, forms and fruit.
Malus 'Adirondack' 18 8 yellow Red fruit. Excellent scab resistance.
Malus 'Red Barron' 18 8 yellow Good for narrow spaces. Red berries.
Malus 'Golden Raindrops' 18 13 yellow Abundant yellow fruit.
Malus 'Tschonoskii' 28 14 scarlet Sparse green fruit, pyramidal.
Parrotia persica / Persian Parrotia 30 20
yellow-
orange
red
Moist to dry soils; drought tolerant when established, deciduous tree with
moderate growth rate; brilliant fall color; often multi-trunked, but can be
trained to have just one; tolerates urban pollution and soil compaction; surface
roots do not generally cause problems; virtually disease and pest-free.
Pranus 'Frankthrees' / Mt. St. Helens Plum 20 20 Purple foliage.
Prunus 'Newport' / Newport Plum 20 20
reddish to
scarlet Purple red foliage.
Prunus cerasifera 'Krauter Vesuvius' /
Flowering Plum 30 15 Upright growth, darkest foliage of the plums.
Prunus cerasifera 'Thundercloud' / Plum 20 20 Dark purple foliage.
Prunus x hillieri 'Spire' 30 10
orange
red
Prunus 'Snowgoose' / Snow Goose Cherry 20 20 Upright when young, spreading when older.
Prunus serrulata 'Amanogawa' / Flowering
Cherry 20 6 bronze Particularly useful for very narrow planting strips.
Prunus serrulata 'Shirofugen' / Japanese
flowering cherry 25 25
Deciduous flowering tree; moist, well-drained soils; double pink to white blooms
in spring; vigorous grower; additional desirable choices include P. serrulata
‘Snowgoose’, ‘Kwanzan’, and ‘Shirotae’.
Prunus x yedoensis 'Akebono' / Flowering
Cherry 25 25 yellow
EXHIBIT 5
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APPROVED TREE LIST – Small, Medium, and Large
H:\CED\Data\Forms-Templates\Self-Help Handouts\Planning\treeslist_march2010.doc P. 5
Botanical name / Common Name
Mature
Height
in Feet
Mature
Spread
in Feet Fall Color Comments
Quercus Ilex / Holly Oak 20 20
Prefers moist soils, but grows in varying soils; hearty, slow-growing evergreen
tree; light pink flowers May-June; pruning will keep tree small for a hedge,
without pruning may grow considerably larger – not appropriate under utility
lines; tolerates salt water spray. Prune to keep small, leave it alone to grow
large.
Styrax japonica / Japanese Snowbell 25 25 yellow Plentiful, green 1/2 inch seeds.
Styrax obassia / Fragrant Snowbell 30 25
Prefers moist, well-drained soil but tolerates wide variations; fragrant with
flowers; twisting bark. Try other Styrax species.
EXHIBIT 5
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APPROVED TREE LIST – Small, Medium, and Large
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MEDIUM TREES:
30 to 50 feet in height
Botanical name / Common Name
Mature
Height
in Feet
Mature
Spread
in Feet Fall Color Comments
Acer campestre 'Evelyn' / Queen Elizabeth
Maple 35 30 yellow More upright branching than the species.
Acer platanoides 'Columnar' / Columnar
Norway maple 40 15 yellow
Deciduous; adapts to varying soils; upright or columnar in form making this
cultivar a better choice for narrow locations; tolerant of drought and seasonal
inundation; tolerates urban pollution and displays brilliant fall color; shallow
rooting necessitates locating at least 4-6 feet from sidewalks and driveways to
prevent heaving of pavement. Good close to buildings.
Acer truncatum x A. platanoides
'Klethsform' / Norwegian Sunset 35 25
yellow-
orange/
red
Acer rubrum 'Bowhall' / Bowhall Maple 40 15
yellow
orange
Acer rubrum 'Karpick' / Karpick Maple 35-40 20
yellow to
orange May work under very high powerlines with arborist's approval.
Acer rubrum 'Scarsen' / Scarlet Sentinel
Maple 40 20
yellow
orange
Acer rubrum / Red Maple 35-50 15-40
Deciduous tree known for fall color; prefer wet or moist soils; fast growing with
roots that may heave sidewalks or interfere with mowing; many cultivars of
varying heights available including: A. rubrum, 'Armstrong', 'Bowhall', 'Karpick',
'Scarsen', and 'Red Sunset'.
Betula jacquemontii / Jacquemontii Birch 40 30 yellow White bark makes for good winter interest.
Carpinus betulus 'Fastigiati' / Pyramidal
European Hornbeam 35 25 yellow
Fagus sylvatica 'Dawyck Purple' / Dawyck
Purple Beech 40 12
Purple foliage.
EXHIBIT 5
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APPROVED TREE LIST – Small, Medium, and Large
H:\CED\Data\Forms-Templates\Self-Help Handouts\Planning\treeslist_march2010.doc P. 7
Botanical name / Common Name
Mature
Height
in Feet
Mature
Spread
in Feet Fall Color Comments
Fraxinus americana 'Autumn Applause' /
Ash 40 25 purple
Deciduous; prefers moist, well-drained soils; dense, wide spreading canopy;
long-lived; purple fall color; moderate growth rate; also try F. Americana
'Junginger'.
Fraxinus oxycarpa 'Raywood' / Raywood
Ash 35 25
reddish
purple
Pyrus calleryana 'Aristocrat' / Pear 40 45 red
Pyrus calleryana 'Chanticleer' / Flowring
Pear 40 15
Deciduous tree that grows well in a variety of soil types; orange to reddish fall
color; white flowers in spring; additional cultivars of interest include P.
calleryana 'Redspire' and 'Aristocrat'.
Pyrus calleryana 'Redspire' / Pear 40 45 red
Pyrus calleryana 'Autumn Blaze' / Pear 30 25 scarlet Vigorous.
Ginko biloba 'Autumn Gold' / Maidenhair
tree 45 35 yellow
Moist soils; deciduous ornamental tree; fast growing and long-lived; tolerant of
urban pollution, summer drought and winter inundation; showy fall color; grows
in soils of varying quality; provides dense canopy; additional cultivars available.
Ginko biloba 'Princeton Sentry' 40 15 yellow Very narrow growth.
Gleditsia triacanthos inermis 'Shademaster'
/ Shademaster Thornless Honeylocust 45 35 yellow
Deciduous; prefers moist, rich soils, but will grow in varying soil types; a
thornless cultivar tolerant of drought and seasonal inundation; adapts to urban
pollution and displays vigorous growth; deciduous tree with showy yellow fall
color; additional cultivars available such as ‘Imperial,’ which grows 30-35 feet,
‘Moraine,’ and ‘Rubylace’. Do not confuse with 'Sunburst'.
Koelreuteria paniculata / Goldenrain Tree 20-35 10-30 yellow
Deciduous; prefers moist well-drained soils, but is tolerant of poor soils; medium
rate of growth and longevity; tolerant of periods of drought and seasonal
inundation; tolerates urban pollution; provides a dense, wide-spreading canopy.
Midsummer blooming.
Oxydendron arboreum / Sourwood 35 12
reddish
purple Consistent and brilliant fall color.
Prunus sargentii 'Columnarus' 35 15
orange to
orange
red The cherry with the best fall color.
EXHIBIT 5
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APPROVED TREE LIST – Small, Medium, and Large
H:\CED\Data\Forms-Templates\Self-Help Handouts\Planning\treeslist_march2010.doc P. 8
Botanical name / Common Name
Mature
Height
in Feet
Mature
Spread
in Feet Fall Color Comments
Quercus 'Crimschmidt' / Crimson Spire Oak 45 15 Hard to find.
Robinia x ambigua 'Idahoensis' / Pink Idaho
Locust 35 25 yellow Fragrant flowers.
Tilia americana 'Redmond' 35 20 yellow Pyramidal, needs water.
Tilia cordata 'Chancole' / Chancelor Linden 35 20 yellow Pyramidal.
Tilia cordata 'De Groot' / Linden 30-50 20 yellow Compact, suckers less than other Lindens.
Tilia cordata 'Greenspire' / Greenspire
Linden 40 30 yellowish Symmetrical pyramidal form.
Tilia cordata 'Littleleaf' / Littleleaf Linden 30-50 30
Deciduous; prefers moist, well-drained soils, but tolerant of a variety of soil
types; tolerant of wind and urban pollution; fast growing and long-lived;
tolerates summer drought and seasonal inundation; provides a dense canopy; C.
cordata is the hardiest Linden; many forms available including, T. cordata
‘Chancellor’, ‘Corzam’, and ’Greenspire’.
EXHIBIT 5
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APPROVED TREE LIST – Small, Medium, and Large
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LARGE TREES:
50 feet in height or taller
Botanical name / Common Name
Mature
Height
in Feet
Mature
Spread
in Feet Fall Color Comments
Acer freemanli / Autumn Blaze Maple 50 40 orange
Abies grandis / Grand Fir 100 40
Evergreen; tolerant of fluctuating water tables and floods; medium rate of
growth; root structure depends on site conditions – shallow in moist areas, deep
taproot in drier conditions.
Acer nigrum 'Green Colunm' / Green
Column Maple 50 20
yellow to
orange Good close to buildings.
Acer platanoides 'Emerald Queen' 50 40 yellow
Deciduous; fast growing with an erect, spreading form; prefers moist soils, but is
tolerant of summer drought and seasonal inundation; tolerates urban pollution;
avoid locating near structures due to shallow, vigorous rooting; additional
cultivars available including A. platanoids ‘Parkway’.
Acer pseudoplatanus / Sycamore maple 40-60 25-40
Deciduous; prefers moist, well-drained soils but is adaptable to may soil types;
tolerates summer drought and seasonal inundation; tolerant of urban pollution
with a moderate growth rate; sturdy, resistant to wind and salt spray; a number
of cultivars are available including: A. pseudoplatanus ‘Atropurpureum,’ ‘
Brilliantissimum,’ ‘Cox’ (Lustre), and ‘Puget Pink’.
Acer saccharum 'Bonfire' 50 40
bright
orange
red Fastest growing sugar maple.
Acer saccharum 'Commemoration' 50 35
orange to
orange-
red Resistant to leaf tatter.
Acer saccharum 'Green Mountain' 45 35
red to
orange
Acer saccharum / Sugar maple 60-75 35
yellow,
orange
Deciduous; prefers moderately moist, well-drained soils; long-lived and tolerant
of urban pollutants; slow to medium growth rate; needs large planting area; a
variety of cultivars available including Acer saccharum ‘Legacy’.
EXHIBIT 5
DocuSign Envelope ID: 161A4F20-D494-466C-B2E0-C93C3D6DC51E
APPROVED TREE LIST – Small, Medium, and Large
H:\CED\Data\Forms-Templates\Self-Help Handouts\Planning\treeslist_march2010.doc P. 10
Botanical name / Common Name
Mature
Height
in Feet
Mature
Spread
in Feet Fall Color Comments
Calocedrus decurrens / Incense cedar 75-90 10-20
Evergreen; tolerant of poor soils; drought tolerant after established; tolerant of
wind and urban conditions; narrow growth habit makes this a good choice for
smaller spaces and ideal for screening, fragrant tree; slow growing and long-
lived.
Carpinus betulus / European Hornbeam 40-60 30-40
Deciduous tree: tolerant of urban pollution and poor soils; cultivars available
and suggested include 'Fasigiata' (30-40 ft height) and 'Franz Fontaine' (30-35 ft
height).
Cedrus deodara / Deodar cedar 40-60 20-40
Evergreen; prefers moist, well-drained soils, but drought tolerant when
established; fairly fast growing and long lived; dense, wide spreading canopy;
attractive cultivars available.
Cercidiphyllum japonicum / Katsura Tree 40-60 20-40
apricot,
orange
Deciduous; requires moist soil and does not do well on hot dry sites. Leaves are
heart-shaped.
Cercidiphyllum japonicum / Katsura Tree 40 40
yellow to
orange
Fagus sylvatica / Green Beech 50 40 bronze Silvery-grey bark.
Fraxinus american 'Autumn Purple' /
Autumn Purple White Ash 60-80 50-70
to a dark
purple
Deciduous; prefers moist well-drained soils but tolerates a range of soil types;
Also try 'Rosehill'.
Fraxinus latifolia / Oregon Ash 40-80 30
Deciduous; saturated, ponded or moist soils; flood tolerant; small green-white
flowers; tolerant of poor soils.
Fraxinus pennsylvanica / Green Ash 50 40
Deciduous; prefers moist soils; fast growth rate; salt, seasonal drought and
urban pollution; numerous cultivars including'Patmore' (50-60 ft. height),
'Summit' (to 45 ft. height), and 'Urbanite' (to 50 ft. height).
Fraxinus pennsylvanica 'Patmore' /
Patmore Ash 45 35 yellow Extremely hardy, may be seedless.
Fraxinus pennsylvanica 'Urbanite' / Ash 50 40
deep
bronze
Gleditsia triacanthos inermis 'Skyline' /
Skyline Thornless Honeylocust 60-70 40 yellow
Deciduous; prefers moist soils, but will grow in poor soils; tolerant of drought,
seasonal inundation, and urban pollution; occasionally fruit pods can create
litter during winter months; thornless. Do not confuse with 'Sunburst'.
EXHIBIT 5
DocuSign Envelope ID: 161A4F20-D494-466C-B2E0-C93C3D6DC51E
APPROVED TREE LIST – Small, Medium, and Large
H:\CED\Data\Forms-Templates\Self-Help Handouts\Planning\treeslist_march2010.doc P. 11
Botanical name / Common Name
Mature
Height
in Feet
Mature
Spread
in Feet Fall Color Comments
Gymnocladus dioicus espresso / Espresso
Kentucky Coffeetree 50 35 yellow Deciduous; drought and variable soil tolerant; seedless.
Liquidamber styraci fleia / American
sweetgum 60-75 40
Deciduous; prefers moist well-drained soils but tolerant of poor soils; drought
tolerant after established; avoid major roadways and restricted sites. Many
cultivars available.
Liriodendron tulipifera / Tulip Tree 60-80 30-60 yellow
Deciduous; prefers moist, deep, well-drained soils, but tolerates poor soils; fast
growing; needs large growing area, lower growing cultivars available such as
'Columnar'. Fast-growing tree.
Metasequoia glyptostoboides / Dawn
redwood 70-100 25
Deciduous; prefers moist, deep, well-drained soils, but tolerates compacted and
poor soils; long-lived, fast growing conifer; tolerant of seasonal inundation and
drought; can grow in standing water; needles turn russet in the fall; needs large
growing area; lower growing cultivars available such as M. glyptostroboides
‘Gold Rush’ and ‘Sheridan Spire’.
Nothofagus antartica / Southern Beech 50 35 none Rugged twisted branching and petite foliage.
Nyssa sylvatica / Tupelo 70+ 20
apricot to
bright red Handsomely chunky bark.
Picca omorika / Serbian spruce 50-60 20-25
Slow growing; tolerant of varying soils and urban pollution; moderately drought
tolerant once established; elegant evergreen spruce, good for narrow locations;
lower growing cultivars available.
Pseudotsuga menziesii / Douglas fir 75-120 40
Evergreen conifer; moist to dry soils; long-lived with a medium to fast rate of
growth; tolerant of summer drought, winter inundation, and poor soils;
withstands wind and urban pollution; provides a nice canopy, but potential
height will restrict placement.
Quercus coccinea / Scarlet oak 50-60 45
brilliant
scarlet to
red
Deciduous; grows in a variety of soil types; long-lived with a moderate growth
rate; tolerant of summer drought and urban pollution; does not tolerate
saturated soils or shade.
EXHIBIT 5
DocuSign Envelope ID: 161A4F20-D494-466C-B2E0-C93C3D6DC51E
APPROVED TREE LIST – Small, Medium, and Large
H:\CED\Data\Forms-Templates\Self-Help Handouts\Planning\treeslist_march2010.doc P. 12
Botanical name / Common Name
Mature
Height
in Feet
Mature
Spread
in Feet Fall Color Comments
Quercus macrocarpa / Burr oak 70-80 30-40
Prefers moist soils, but is adaptable to varying soils; slow growing and long-lived;
rugged looking deciduous tree; tolerant of seasonal drought and inundation;
tolerates urban pollution and city conditions; provides a wide-spreading, dense
canopy.
Quercus phellos / Willow oak 60-70 50
Deciduous; prefers moist, well-drained soils, but grows in a wide range of soils
types; long-lived tree with moderate growth rate and fibrous root system;
tolerant of seasonal drought and inundation, as well as urban pollution; provides
a wide-spreading, dense canopy; small delicate leaves.
Quercus palustris 'Crownright' 80 40 More upright form of Pin Oak.
Quercus robar / English oak 40-60+ 40
Prefers well-drained soil; slow to moderate growth rate; long-lived deciduous
tree; tolerant of seasonal drought and inundation; tolerates urban pollution,
poor soils and constrained root space; susceptible to powdery mildew; many
varieties and cultivars available including: ‘Concordia,’ ‘Fastigiata,’ ‘Foliis
Variegatis, and ’Westminster Globe.’
Quercus rubra / Northern red oak 60-75 50
Prefers moist, well-drained soils, but drought tolerant when established;
tolerates seasonal inundation, urban pollution and salt spray; moderate rate of
growth and longevity; provides a dense, wide-spreading canopy; susceptible to
oak wilt fungus.
Quercus shumardii / Shumard's oak to 70 50
Prefers moist, well-drained soils; deciduous, long-lived tree; tolerant of seasonal
drought and inundation, urban pollution and poor soils.
Taxodium distichum / Bald cypress to 75 40
Deciduous conifer; wet, mucky soils; tolerant of summer drought and seasonal
flooding; will grow in poor soils; slow growing; long-lived with a wide-spreading
canopy; roots do not appear to lift sidewalks as readily as other species; prune
lower branches for sight-lines; cultivars include T. distichum ‘Shawnee Brave’.
Thuja plicata / Western red cedar 200+ 60
Moist to swampy soils; evergreen tree tolerant of seasonal flooding and
saturated soils; a good tree for screening; long-lived; cultivars ‘Pumilio’ and
‘Cuprea’ are shorter versions, ‘Aurea’ and ‘Atrovirens’ have distinctive foliage.
Tilia americana x euchlora 'Redmond' /
Redmond Linden 50 35 yellow
Prefers moist, rich soils, but tolerant of a variety of soils; tolerant of seasonal
drought and inundation, urban pollution and poor soils; deciduous tree
resistant; also try 'Sentry' and 'Boulevard'.
EXHIBIT 5
DocuSign Envelope ID: 161A4F20-D494-466C-B2E0-C93C3D6DC51E
APPROVED TREE LIST – Small, Medium, and Large
H:\CED\Data\Forms-Templates\Self-Help Handouts\Planning\treeslist_march2010.doc P. 13
Botanical name / Common Name
Mature
Height
in Feet
Mature
Spread
in Feet Fall Color Comments
Tilia plalyphyllos / Bigleaf linden 60-80 60
Prefers moist, well-drained soils, but grows in a variety of soil types; deciduous
tree with medium growth rate; long-lived; tolerant of seasonal drought and
inundation; tolerates urban pollutants; provides a wide-spreading, dense
canopy; yellowish-white flowers attract bees.
Tilia tomentosa / Silver Linden 40-75 25-45
Deciduous; prefers moist, well-drained soils, but drought tolerant when
established; urban tolerant. Cultivars include 'sterlay' and 'Green Mountain'.
Ulmus ssp. / Elm hybrids 50-60 35-50 yellow
Deciduous; prefers moist, well-drained soils, but drought tolerant; rapid grower;
a hybrid elm resistant to Dutch elm disease; suggested hybrids include
‘Accolade’, ‘Homestead’ and ‘Pioneer’.
Ulmus 'Homestead' / Homestead Elm 60 35 yellow
Ulmus parvifolia / Lace Bark Elm 50 40
Deciduous; prefers moist, well drained soils but tolerant of soil types and hot dry
conditions. Flaking bark of orange, gray, green and brown color. Several cultivars
including 'Allee' and 'Bosque'.
Ulmus 'Pioneer' / Pioneer Elm 60 50 yellow Resistant to Dutch elm disease.
Umbellularia californica / Oregon myrtle 40-75+ to 50
Prefers moist, well-drained soils; slow growing evergreen tree with aromatic
leaves; tolerates seasonal drought and inundation; tolerant of urban pollution;
provides a wide spreading, dense canopy; resistant to pests and disease; good
for tall hedges or, when trunks are thinned, as a street tree; requires summer
watering until established.
EXHIBIT 5
EXHIBIT 5
DocuSign Envelope ID: 161A4F20-D494-466C-B2E0-C93C3D6DC51E