HomeMy WebLinkAboutTree Standards I
STREET TREE STANDARDS
• Community&Economic Development
City of Arlington• 18204 59th Avenue NE •Arlington,WA 98223 • Phone (360) 403 3551
The following City of Arlington standards shall be used to regulate trees in the public right-of-ways, parks and on
other public lands.
A. Small Street Trees F. Prohibited Street Trees
B. Small Narrow Street Trees G. Open Space Trees
C. Medium Narrow Street Trees H. Native Trees
D. Medium Street Trees I. Drought Resistant Trees
E. Large Street Trees J. Median Plantings
F. Boulevard Trees K. Parking Lot Plantings
Tree Standards
Street trees shall be planted according to the following minimum standards as illustrated in`Tree Planting Detail'.
1. Spacing Between Trees:
a. Small (columnar) 30 feet
b. Small (spreading) 30 feet
c. Medium (columnar) 30 feet
d. Medium (spreading) 40 feet
e. Large 45 feet
f. Boulevard 50 feet
g. Median 40 feet(per median standards)
h. Specialty determined by director
2. Distance to curb 3 feet at planting time
3. Distance to parking lot pavement edges 4 feet at planting time
4. Distance to power pole 10 feet
5. Distance to fire hydrant 5 feet
6. Distance to water meter box 5 feet
7. Distance to residential driveway 10 feet
8. Distance to street light 15 feet
9. Distance to commercial or industrial driveway 15 feet
10. Distance to alley right-of-way 10 feet
11. Distance to street intersection 30 feet
12. Distance to stop sign 15 feet
13. Clearance over public sidewalk 8 feet
14. Clearance over public street 14 feet
Revised 012019
Acceptable Street Trees
Only those trees which are listed as appropriate for planting as street trees below shall be planted. Where
overhead power lines and other cables are present, the size of tree may be otherwise restricted. All street trees
shall be single stemmed.
A.) Small Street Trees typically have a crown not exceeding 30 feet tall and a spreading habit. The following
trees are considered small and require a planter area at least 5 feet in width,and require a root barrier of at
least 18 inches in depth.These are the only trees allowed where there are overhead utility lines.
1. Autumn Brilliance Serviceberry,amelanchier grandiflora'Autumn Brilliance'
2. Eastern Redbud, cercis canadensis
3. Globe Norway Maple,acer platanoides 'Globosum'
4. Japanese Maple,acer palmatum
5. Japanese Snowbell Tree,styrax japonica
6. Kousa Dogwood, cornus kousa
7. Japanese Hornbeam, carpinus japonica
8. Persian Parrotia,parrotia persica
9. Globe Ash,fraxinus excelsior'Globosa'
10. Krauter Vesuvius Flowering Plum,prunus cerasifera'Krauter Vesuvius'
11. Thundercloud Flowering Plum,prunus cerisifera'Thundercloud'
12. Newport Flowering Plum,prunus cerisifera'Newport'
13. Okame Flowering Plum,prunus 'Okame"
14. Globe Locust, robinia pseudoacacis 'Inermis'
15. Golden Desert Ash,fraxinus excelsior'Aureafolia'
16. American Hornbeam,carpinus caroliniana
17. Canada Red Chokecherry,prunus virginiana'Canada Red'
18. Kwanzan Oriental Cherry,prunus serrulata'Sekiyama'
19. Bessoniana Black Locust,robinia pseudo acacia'Bess oniana'
20. Paperbark Maple,acer griseum
21. Cherry Dogwood; cornus mas
22. Pink Pagoda Hupeh Mountain Ash,sorleus hupehensis 'Pink Pagoda'
B.) Small Narrow Street Trees typically have a crown not exceeding 30 feet tall and have a narrow growing
habit. The following trees are considered small street trees and require a planter area at least 5 feet in
width,and require a root barrier of at least 18 inches in depth.
1. Crimson Sentry Maple,acer platanoides 'Crimson Sentry'
2. Red Cascade Mountain Ash,sorbus tianshanica
C.) Medium Narrow Street Trees typically have a crown not exceeding 45 feet tall and have a narrow
growing habit.The following trees require a planter area of at least 5 feet in width,and require root barrier
at least 24 inches in depth.
1. Amanogawa Oriental Cherry,prunus serrulata'Amanogawa'
2. Bowhall Red Maple, acer rubrum'Bowhall'
3. Capital Callery Pear,pyrus calleryana'Capital'
4. Autumn Blaze Callery Pear,pyrus calleryana'Autumn Blaze'
S. Columnar Norway Maple,acer platanoi des 'Columnare'
6. Columnar Sargent Cherry,prunus sargenti columnaris
Revised 012019
7. Pyramidal Dawychii Beech,fagus sylvatica'Dawychii'
8. Pyramidal Hornbeam,carpinus betulus pyramidalis
9. Skyrocket English Oak, quercus robur'Skyrocket'
10. Fastigiate European Hornbeam,carpinus betulus 'Fastigiata'
11. Karpick Maple,acer rubrum 'Karpick'
D.) Medium Street Trees typically have a crown not exceeding 45 feet in height and a spreading habit. The
following trees require a planter area of at least 5 feet in width, and require root barrier at least 24 inches
in depth.
1. Aristocrat Callery Pear,pyrus calleryana'Aristocrat'
2. Autumn Blaze Callery Pear,pyrus calleryana'Autumn Blaze'
3. Chanticleer Callery Pear,pyrus calleryana'Chanticleer'
4. Cleveland Select Callery Pear,pyrus calleryana'Cleveland Select'
S. Hedge Maple,acer compestre
6. Little Leaf Linden,tilia cordata'Green Spire'
7. Worplesdon Sweetgum,liquidambar styraciflua'Worplesdon'
8. American Hiphornbeam,ostrya virginiana
9. Autumn Flame Red Maple,acer rubrum 'Autumn Flame'
10. Crimson King Norway Maple,acer platanoides 'Crimson King'
11. Ginko Tree,ginko biloba (any variety)
12. European Hornbeam, carpinus betulus
13. Green Vase Japanese Zelkova, zelkova serrata'Green Vase'
14. Katsura Tree, cercidiphyllium japonicum
15. Sawtooth Oak, quercus acuissima
16. Ruby Red Horsechestnut,aesculus x carnea'Briotii'
17. European Bird Cherry,prunus padus
18. Whitebeam, sorbus aria'Magnifica'and'Maj estica'
19. Jacquemont Birch,betula jacquemontii
20. Raywood Ash,fraxinus oxycarpa'Raywood'
21. Sour Gum,nyssa sylvatica
22. Coliseum Maple,acer cappadocicum 'Rubrum'
23. Chinese Tulip,liriodendron chinense
24. Yulan Magnolia,magnolia denudata
25. American Yellowood, cladrastis lutea
26. Kobus Magnolia,magnolia kobus
27. Willow Oak,quercus phellos
28. Flowering Cherry,prunus serrulata
29. Flowering Ash,franxinus ornus
E.) Large Street Trees typically have a crown exceeding 50 feet and a spreading habit.These trees require a
planter area at least 8 feet in width,and require a root barrier of at least 24 inches in depth.
1. Pin Oak,quercus palustris
2. Red Oak, quercus rubra
3. Birchbark Cherry,prunus serrula
4. European Beech, fagus sylvatica
S. Red Maple,acer rubrum ('October Glory', 'Red Sunset')
Revised 012019
6. Autumn Purple Ash,fraxinus Americana
7. Flowering Cherry,prunus yedonensis 'Akebono'
8. River Birch,betula nigra
9. Green Ash,fraxinus pennsylvanica lanceolata
F.) Boulevard Trees typically have a crown exceeding 60 feet and a spreading habit. The following trees
require a planter area at least 10 feet wide,and require a root barrier of at least 24 inches in depth.
1. Tulip tree,liriodendron tulipifera
2. Bur Oak,quercus macrocarpa
3. Dawn Redwood metasequoia glyptostroboides
4. English Oak,quercus robur
5. Flowering Cherry,prunus yedoensis 'Yoshino'
G.) Prohibited Street Trees
The use of the following trees within the street right-of way is prohibited:
1. Bigleaf Maple,acer macrophyllum
2. Box Elder,acer negundo
3. Silver Maple,acer saccharinum
4. Weeping Willow,salix
5. Fir,pseudostuga
6. Cedar,cedrus or thuja (except as allowed)
7. Hemlock,tsuga
8. Spruce,picea
9. Pine,pinus
10. Poplar,populus deltoids,populus trichocarpa,populus nigra italicas
11. Any nut or fruit bearing tree,except ornamentals
12. London Plane Sycamore,platanus
H.) Open Space Trees used in areas that are not in planting strips,not under
powerlines, and where street trees are not required. However, any of the street trees are acceptable as
open space trees. The following trees are acceptable open space trees.
1. Bigleaf Maple,acer macrophyllum
2. Sugar Maple,acer saccharum
3. Weeping Willow,salix
4. Fir,pseudostuga (varieties)
S. Cedar, cedrus of thuja(varieties)
6. Spruce,picea (varieties)
7. Pine,pinus (varieties)
8. Flowering Crabapple (varieties),malus
9. Hackberry,celtis ocidentalis
10. European Mt.Ash,sorbus aucuparia
I.) Native Trees are used in open areas and naturalized areas. The following is a list of trees native to western
Washington. These trees are not acceptable as street trees.
1. Grand Fir,abies grandis
2. Vine Maple,acer circinatum
3. Bigleaf Maple,acer macrophyllum
Revised 012019
4. Red Alder, alnus rubra
5. Western Serviceberry,amelanchier alnifolia
6. Pacific Madrone,arbutus menziesii
7. Pacific Dogwood, cornus nuttallii
8. Black Hawthorn, crataegus suksdorfii
9. Oregon Ash,fraxinus latifolia
10. Pacific Crabapple,malus fusca
11. Sitka Spruce,picea sitchensis
12. Shore Pine,pinus contorta
13. Western White Pine,pinus monticola
14. Black Cottonwood,populus balsamifera
15. Bitter Cherry,prunus emarginata
16. Douglas Fir,pseudotsuga menziesii
17. Oregon White Oak, quercus garryana
18. Pacific Willow,salix lucida
19. Scouler Willow, salix scouleriana
20. Sitka Willow, salix sitchensis
21. Western Yew,taxus brevifolia
22. Western Red Cedar,thuja plicata
23. Western Hemlock,tsuga heterophylla
J.) Drought Resistant Trees are trees have a moderate to very good tolerance to drought conditions. All
young, newly planted trees require irrigation for a minimum of two years. These trees are known to be
drought resistant at maturity.
1. Green Ash,large street tree
2. Raywood Ash,medium street tree
3. European Mt.Ash, open space tree
4. River Birch,large street tree
S. Columnar Sargent Cherry,medium narrow street tree
6. Yoshino Cherry,boulevard tree
7. Canada Red Chokecherry,small street tree
8. Flowering Crabapple, open space tree
9. Green Vase Zelkova,medium street tree
10. Douglas Fir,native tree
11. Ginko Tree,medium street tree
12. Hackberry, open space tree
13. European Hornbeam, medium street tree
14. American Yellow Wood,medium street tree
15. Little Leaf Linden,medium street tree
16. Black Bessoniana Locust,small street tree
17. Pacific Madrone,native tree
18. Autumn Flame Red Maple, open space tree
19. Globe Norway Maple,small street tree
20. Hedge Maple,medium street tree
21. Bur Oak,boulevard tree
22. English Oak,boulevard tree
Revised 012019
23. Red Oak,large street tree
24. Sawtooth Oak,medium street tree
25. Willow Oak,medium street tree
26. Callery Pear cultivars,medium street tree
27. Eastern Redbud,small street tree
28. Worplesdon Sweetgum,medium street tree
K.) Median Plantings shall be ground cover or low shrubs with a maturity of not more then18"height, 20 feet
from each end. Only trees from the small and medium street tree list may be used with root barriers in
medians. The remaining areas shall be shrubs of no more than 36 inches (3 feet) high at maturity and shall
be planted as identified in the Public Works Construction Standards and specifications.
L.) Parking Lot Plantings shall include trees and shrubs with a minimum distance of 48 inches (4 feet) from
parking area pavement edge to allow for vehicle overhang except where wheel stops are provided,in which
case the minimum distance from the pavement edge is 24" (2 feet). Parking lot shade trees, shrub and
ground covers are to be chosen from the street tree and shrub list and planted according to the Public
Works Construction Standards and Specifications.
Revised 012019