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Home My WebLink AboutRenton Arborist Report - Varma Subdivision Updated 2-23-2021 LAYTON TREE CONSULTING, LLC It’s all about trees…… PO BOX 572, SNOHOMISH, WA 98291-0572 * 425-220-5711 * bob@laytontreeconsulting.com ARBORIST REPORT/TREE PLAN 13016 156th Avenue SE King County Parcels 366450-0185 and 366450-0205 Renton, WA Report Prepared by: Bob Layton Registered Consulting Arborist #670 Certified Arborist #PN-2714A July 13, 2020 Updated 2/23/2021 Arborist Report – Varma Renton Subdivision Page 2 Layton Tree Consulting LLC July 13, 2020; Updated 2/23/2021 Table of Contents Assignment.................................................................................................................................................... 3 Description .................................................................................................................................................... 3 Methodology ................................................................................................................................................. 3 Judging Condition...................................................................................................................................... 4 Judging Retention Suitability .................................................................................................................... 4 Observations ................................................................................................................................................. 4 Discussion/Recommendations ...................................................................................................................... 6 Tree Density-Tree Replacement ................................................................................................................... 6 Arborist Disclosure Statement ...................................................................................................................... 8 Attachments Photos, pages 9 - 13 Tree Summary Tables Tree Plan Maps Tree Retention Worksheet City of Renton – Approved Tree List Arborist Report – Varma Renton Subdivision Page 3 Layton Tree Consulting LLC July 13, 2020; Updated 2/23/2021 Assignment Layton Tree Consulting, LLC was contacted by Kushal Varma, and was asked to compile an Arborist Report for two parcels in Renton. The subject property is located at 13016 156th Avenue SE and includes Parcel 366450-0185 and 366450-0205. The purpose of the report is to satisfy City requirements associated with tree retention regulations and the proposed development of the property. My assignment is to prepare a written report on present tree conditions, which is to be submitted to the City with the development application materials. 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. Dates of Field Examination: July 6th and 7th, 2020 Description 198 trees were identified and assessed on the subject parcels. The majority of the property is heavily treed. Trees were identified in the field with a numbered piece of orange flagging tape or a numbered aluminum tag, attached to the lower trunk. These tag numbers correspond with the numbers on the attached Tree Summary Tables and attached Tree Plan Maps. There are also several significant neighboring trees whose crowns or canopies encroach upon the subject property. These trees were assessed and are included in this report. A ‘significant’ tree as defined by the City is ‘A tree with a caliper of at least six inches (6"), or an alder or cottonwood tree with a caliper of at least eight inches (8"). Trees qualified as dangerous shall not be considered significant. Trees planted within the most recent ten (10) years shall qualify as significant trees, regardless of the actual caliper’. 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. Arborist Report – Varma Renton Subdivision Page 4 Layton Tree Consulting LLC July 13, 2020; Updated 2/23/2021 Judging Condition The three condition categories are described as follows: 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, obvious irreversible decline due to old age, disease or pests, not suitable for its location The attached tree plan maps indicate the ‘condition rating’ of the subject trees found at the site. The attached Tree Summary Table provides specific information on tree sizes and condition; and drip-line measurements for trees with a potential for retention. Judging Retention Suitability Not all trees necessarily warrant retention. The three retention suitability categories as described in ANSI A300 Part 5 (Standard Practices for the Management of Trees During Site Planning, Site Development and Construction) are as follows: Good – trees are in good health condition and structural stability and have the potential for longevity at the site Fair – trees are in fair health condition and/or have structural defects that can be mitigated with treatment. These trees may require more intense management and monitoring, and may have shorter life-spans than those in the “good” category. Poor – trees are in poor health condition and have significant defects in structure that cannot be mitigated with treatment. These trees can be expected to decline regardless of management. The species or individual tree may possess characteristics that are incompatible or undesirable in landscape settings or be unsuited for the intended use of the site. Observations The subject property is heavily treed and contains a variety of native species and some planted ornamental varieties. Many trees were planted approximately 20 to 25 years ago. No trees have been planted within the last 10 years. Douglas fir is the most dominant species on the property. The vast majority are in good condition with foliage of normal color and density. No root disease concerns were identified on the property. There are two age classes of Douglas fir, approximately 60 to 70 years and 20 to 25 years. The younger Arborist Report – Varma Renton Subdivision Page 5 Layton Tree Consulting LLC July 13, 2020; Updated 2/23/2021 planted fir trees are found mostly on the south half of the study area. Some of these have major structural defects (forked tops with codominant (equal diameter) stems that have begun to fail or will fail in the near future. Western red cedar is also commonly found on the property. Trees are of good vigor for the most part, with foliage of normal color and density. Some have major structural defects (forked tops with codominant (equal diameter) stems that have begun to fail or will fail in the near future. There is a grouping of four mature Scouler’s willow clusters in the middle of the property. All are in obvious decline due to old age with dead tops and the development of significant trunk decay; which is common for the species. These are in ‘poor’ condition and have poor retention suitability. Several other coniferous trees were planted on the property many years ago which include white and Norway spruce; ponderosa, Scots, Western white and shore pine; a grand fir and noble fir, and a giant sequoia. These are primarily young to semi-mature specimens. Most are in fair to good condition. One of the two Western white pine has a bole infection of blister rust and is in ‘poor’ condition. A few deciduous varieties were also planted on the property several years ago, which include red maple, silver maple, an English walnut, paperbark maple and Siberian elm. Most are in fair to good condition and have developed typical form or architecture for the species. Several trees were identified that have major structural defects. These are mostly forked trunks with codominant (equal diameter) stems that are weakly attached to the main trunk. This is evident by a significant buildup of included or embedded bark at the fork and a longitudinal seam. Some have already partially failed or are beginning to split apart. These trees cannot be safely retained and are rated as ‘poor’ condition. Neighboring Trees Adjacent to the north parcel exists a closely spaced planted row of semi-mature Western red cedar near the east property line. Trees are located 2 to 5-feet from the existing fence. Tree diameters range between 6 and 20-inches with heights of 50 to 60-feet. Vigor is good. Trees have foliage of normal color and density. No signs of decline were observed. There is a small planted row of four Western red cedar trees north of proposed Lot 7 as well. These are approximately 6-feet off of the property line/fence. All are in fair to good condition. Trees #501 and #502 are located off of the north property line of the south parcel. Both are located roughly 3-feet off of the fence/property line. These are a semi-mature Douglas fir and Western red cedar. #501 is in good condition. #502 has a forked top and is rated as ‘fair’ condition. Tree #503 is a semi-mature to mature Douglas fir located off of the southeast property corner. It has an old broken top and English ivy covering the root crown. Vigor appears to be fairly good. No outward indicators any significant internal decay was observed on the lower trunk. Condition is ‘fair’. Arborist Report – Varma Renton Subdivision Page 6 Layton Tree Consulting LLC July 13, 2020; Updated 2/23/2021 There are three semi-mature to mature ponderosa pine trees off of the south property line at proposed Lots 8 and 9. All of these are in fair to good condition. These will be protected by the protection of trees on the south perimeter of the site. Trees #504 > #508 are also located off of the south property line. These have all developed typical form for the species. Conditions range from fair to good. Trees #509 > #516 are located within the right-of-way of 156th AVE SE. These include a mix of semi- mature to mature native and ornamental planted species. Conditions range from fair to good. Discussion/Recommendations Trees rated as ‘poor’ condition are considered dangerous by the following definition (Tree, Dangerous: Any tree that has been certified, in a written report, as dead, terminally diseased, damaged, or otherwise dangerous to persons or property by a licensed landscape architect, or certified arborist) and therefore are not considered ‘significant’. Trees rated as ‘poor’ condition have poor retention suitability and will not positively contribute to the landscape. Of the 198 trees assessed, 23 are in ‘poor’ condition and considered non-significant and/or non-viable. The proposal is to retain trees along the southern perimeter of the property. These are mostly young to semi-mature specimens. See the attached tree plan maps. The driplines of proposed save trees have been delineated on the maps, along with the recommended location of tree protection fencing. The protection of trees on the south perimeter will afford protection for off-site trees #503 > #508 and the large neighboring pine trees adjacent to proposed Lot 8. The off-site planted row of Western red cedar on the neighboring property to the east of the north parcel warrants protection. Position the tree protection barrier at a minimum of 12 ½ -feet from the property line as shown on Tree Plan Map 1. Maintain the existing grade within this 12 ½ -foot setback. Neighboring trees #501 and #502 will be impacted by the new proposed roadway. In order to keep impacts to acceptable levels, the roadway will need to be constructed at or above the existing grade. Utilities shall be kept outside of dripline areas. The project arborist shall be on-site to monitor all and any work within the driplines of protected trees to ensure impacts are maintained at acceptable levels. It is assumed all trees within the right-of-way of 156th AVE SE (Trees #509 > #516) will be removed for street frontage improvements. Tree Density-Tree Replacement RMC 4-4-130 H. 1. Protected Trees – Retention Required: Significant trees required to be retained pursuant to subsection H1a of this Section, Percentage of Tree Retention Based on Zones, are considered “protected trees.” Protected trees may contribute to each residential lot’s required minimum tree density, but any trees that are in excess of an individual lot’s minimum tree density shall not Arborist Report – Varma Renton Subdivision Page 7 Layton Tree Consulting LLC July 13, 2020; Updated 2/23/2021 contribute to the total number of trees that are required to be retained for the Land Development Permit. Protected trees that do not contribute to a lot’s required minimum tree density shall be held in perpetuity within a tree protection tract pursuant to subsection H2 of this Section, Tree Protection Tract; protected trees on an individual lot are the responsibility of the lot owner and may only be removed if in compliance with subsection C of this Section, Allowed Tree Removal Activities. Significant trees shall be retained as follows: a. Percentage of Tree Retention Based on Zones: Properties subject to an active Land Development Permit or building permit shall retain the following percentages of significant trees based on the property’s zone. Trees within critical areas and proposed public rights-of-way shall not contribute to the number of significant trees required to be retained. i. RC, R-1, R-4, R-6 and R-8 Zones: At least thirty percent (30%) of the significant trees shall be retained in a residential or institutional development. c. Calculating Tree Retention: Tree retention standards shall be applied to the developable area of a property (i.e., land within critical areas and their buffers, public rights-of-way, private PUD streets, shared driveways, and public trails shall be excluded). If the number to be retained includes a fraction of a tree, any amount equal to or greater than one-half (1/2) tree shall be rounded up. The subject site requires the retention of 30% of significant trees. 198 significant trees were identified on the property. 23 of these are in poor condition or non-viable. Trees within proposed public rights-of- way shall not contribute to the number of significant trees required to be retained per the code section above. There is a total of 66 significant trees within the proposed new street rights of way. Tree retention is based on 109 significant trees requiring the retention of 33 trees. See the attached ‘Tree Retention Worksheet’. A total of 33 trees are proposed for retention, satisfying the requirement. Replacement trees will be required to meet minimum density requirements for each proposed Lot. Some of the proposed lots will not meet density requirements and will require supplemental trees. The following number of replacement trees is anticipated: Lot 1 – 13,095 sq. ft. = 5.2 No Trees Retained - (5) replacement trees required Lot 2 – 13,088 sq. ft. = 5.2 No Trees Retained - (5) replacement trees required Lot 3 – 14,558sq. ft. = 5.8 No Trees Retained - (6) replacement trees required Lot 4 – 9,708. ft. = 3.9 - 8 trees retained (0) replacement trees required Lot 5 - 9,703. ft. = 3.9 - 4 trees retained (0) replacement trees required Lot 6 - 9,698. ft. = 3.9 - 3 trees retained (1) replacement trees required Lot 7 - 9,694. ft. = 3.9 - 4 trees retained (0) replacement trees required Lot 8 - 9,689. ft. = 3.9 - 8 trees retained (0) replacement trees required Lot 9 - 9,684. ft. = 3.9 - 4 trees retained (0) replacement trees required Arborist Report – Varma Renton Subdivision Page 8 Layton Tree Consulting LLC July 13, 2020; Updated 2/23/2021 Total Replacement Trees required = 17 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. 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. Arborist Report – Varma Renton Subdivision Page 9 Layton Tree Consulting LLC July 13, 2020; Updated 2/23/2021 Photo Documentation North parcel Planted row of Western red cedar abutting east property line of north parcel Arborist Report – Varma Renton Subdivision Page 10 Layton Tree Consulting LLC July 13, 2020; Updated 2/23/2021 Scouler’s willow cluster with extensive trunk decay Planted row of 4 cedar abutting north property line of south parcel Arborist Report – Varma Renton Subdivision Page 11 Layton Tree Consulting LLC July 13, 2020; Updated 2/23/2021 Neighboring Tree #502 Northeast section of south parcel Arborist Report – Varma Renton Subdivision Page 12 Layton Tree Consulting LLC July 13, 2020; Updated 2/23/2021 Trees on south perimeter at proposed Lot 4 Southwest section of south parcel Arborist Report – Varma Renton Subdivision Page 13 Layton Tree Consulting LLC July 13, 2020; Updated 2/23/2021 Trees on south perimeter at proposed Lot 5 Trees in right-of-way of 156th AVE SE Layton Tree Consulting LLC For:Kushal Varma Site:13016 156th AVE SE - Renton Tree Summary Table Date: Condition - Tree/DBH Height Retention Tag #Species (inches)(feet)Suitability Comments Proposal N S E W 1 Douglas fir 10 33 Fair over topped by maple Remove 2 Douglas fir 8 30 Fair over topped by maple Remove 3 Douglas fir 6 28 Poor suppressed Remove 4 Douglas fir 6 20 Poor suppressed, 90% dead Remove 5 Western red cedar 8 30 Good over topped by maple Remove 6 Douglas fir 8 42 Fair over topped by maple Remove 7 Douglas fir 24 80 Good no concerns Remove 8 Douglas fir 13 68 Fair no concerns Remove 9 Douglas fir 13 75 Fair no concerns Remove 10 Douglas fir 13 74 Fair no concerns Remove 11 Western red cedar 11 42 Good no concerns Remove 12 Douglas fir 8 47 Fair suppressed, lean Remove 13 Scoulers willow 9 32 Poor dead top, major decline Remove 14 Scoulers willow 24 45 Poor over mature, extensive trunk decay Remove 15 Scoulers willow 16,10,9 (21)58 Poor over mature, extensive trunk decay Remove 16 Scoulers willow 15,10,9,9,7,7 (24)46 Poor large cluster, significant trunk decay, dead tops Remove 17 Western red cedar 32,30 (44)66 Fair good vigor, decent form Remove 18 Western red cedar 39 64 Fair good vigor, decent form Remove 19 Western red cedar 44 52 Fair old broken top, good vigor Remove 20 bigleaf maple 40 92 Fair trunk forks at 6 feet into multiple stems Remove 21 red maple 12 57 Poor dead top, suppressed, poor form Remove 22 flowering cherry 8 26 Fair suppressed, lean Remove 23 Scots pine 26 87 Fair trunk forks at 8 feet, significant included bark Remove 24 Douglas fir 34 105 Good no concerns Remove 25 Norway spruce 31 97 Fair decent vigor, sound trunk Remove 26 bigleaf maple 26 74 Fair forked trunk Remove 27 noble fir 10 52 Poor suppressed, forked top, trunk covered in ivy Remove 28 white spruce 27 82 Fair good form, trunk covered in ivy Remove 29 white spruce 14 63 Fair forked top Remove 30 Western red cedar 12 35 Good no concerns Remove 31 cascara 8,7 (11)40 Poor trunks split apart Remove 32 Western red cedar 37 79 Fair forked top Remove 33 silver maple 18 77 Poor forked trunk, weak attachment Remove Drip-Line (feet) 7/7/2020 Layton Tree Consulting LLC For:Kushal Varma Site:13016 156th AVE SE - Renton Tree Summary Table Date: Condition - Tree/DBH Height Retention Tag #Species (inches)(feet)Suitability Comments Proposal N S E W Drip-Line (feet) 7/7/2020 34 Douglas fir 22 95 Good natural lean north Remove 35 Western red cedar 31 85 Poor forked trunk,splitting apart Remove 36 cherry plum 14 25 Poor poor form, broken tops Remove 37 Western red cedar 14 46 Fair somewhat suppressed Remove 38 silver maple 10,5 33 Fair young, poor form Remove 39 Western red cedar 31 78 Good no concerns Remove 40 European Mtn ash 10,8,6,6,6 (17)55 Fair large cluster, decent vigor Remove 41 Western red cedar 33,31 (45)80 Fair natural leans Remove 42 Douglas fir 9 48 Fair somewhat suppressed Remove 43 Douglas fir 9 44 Fair forked top Remove 44 red alder 14 47 Fair decent vigor, some trunk decay Remove 45 red alder 13 46 Poor poor form Remove 46 Douglas fir 10 43 Fair trunk covered in ivy Remove 47 Douglas fir 25 77 Good no concerns Remove 48 Douglas fir 7 36 Fair somewhat suppressed Remove 49 Douglas fir 8 45 Fair somewhat suppressed Remove 50 cherry plum 6 29 Fair poor form Remove 51 Douglas fir 12 48 Good young, no concerns Remove 52 Douglas fir 15 50 Good young, no concerns Remove 53 Western red cedar 15 42 Good young, no concerns Remove 54 Douglas fir 17 57 Good young, no concerns Remove 55 Douglas fir 14 51 Fair forked top Remove 56 Douglas fir 26 77 Good no concerns Remove 57 Douglas fir 8 38 Good young, no concerns Remove 58 Douglas fir 14 52 Fair forked top Remove 59 Douglas fir 9 41 Good young, no concerns Remove 60 Douglas fir 7 34 Good young, no concerns Remove 61 Western red cedar 11 29 Good young, no concerns Remove 62 ponderosa pine 19 60 Fair forked top Remove 63 Douglas fir 20 62 Good young, no concerns Remove 64 ponderosa pine 20 66 Fair forked top Remove 65 Western red cedar 13 40 Good young, no concerns Remove 66 Western red cedar 12 36 Good young, no concerns Remove Layton Tree Consulting LLC For:Kushal Varma Site:13016 156th AVE SE - Renton Tree Summary Table Date: Condition - Tree/DBH Height Retention Tag #Species (inches)(feet)Suitability Comments Proposal N S E W Drip-Line (feet) 7/7/2020 67 Western red cedar 11 39 Good young, no concerns Remove 68 ponderosa pine 16 51 Good good form, good vigor Remove 69 Western white pine 17 55 Poor blister rust infection on lower trunk Remove 70 Douglas fir 13 54 Good young, no concerns Remove 71 Douglas fir 12 49 Fair forked top Remove 72 grand fir 20 52 Good full crown, minor fork Remove 73 Western white pine 17 53 Good young, no concerns Remove 74 Douglas fir 13 56 Good young, no concerns Remove 75 Douglas fir 16 60 Good young, no concerns Remove 76 Douglas fir 9 44 Good young, no concerns Remove 77 Douglas fir 20 60 Good young, no concerns Remove 78 Douglas fir 13 47 Good young, no concerns Remove 79 Western red cedar 15 42 Good young, no concerns Remove 80 Douglas fir 18 58 Good young, no concerns Remove 81 Douglas fir 12 49 Good young, no concerns Remove 82 Douglas fir 10 45 Good young, no concerns Remove 83 Western red cedar 10,9,7 (15)31 Fair young cluster, poor basal attachments Remove 84 Douglas fir 13 47 Good young, no concerns Remove 85 Douglas fir 17 56 Good young, no concerns Remove 86 Western red cedar 18 40 Good young, no concerns Remove 87 Western red cedar 18 34 Good young, no concerns Remove 88 Western red cedar 10 27 Good young, no concerns Remove 89 Douglas fir 25 90 Good trunk covered in ivy Remove 90 Douglas fir 21 82 Fair forked top, trunk covered in ivy Remove 91 Douglas fir 21 75 Good no concerns Remove 92 Douglas fir 16 70 Fair somewhat suppressed Remove 93 Douglas fir 17 73 Good no concerns Remove 94 Douglas fir 15 68 Good no concerns Remove 95 Douglas fir 16 70 Good no concerns Remove 96 Douglas fir 22 80 Good trunk covered in ivy Remove 97 Douglas fir 23 78 Fair forked top, trunk covered in ivy Remove 98 Douglas fir 12 64 Fair poor trunk taper Remove 99 Douglas fir 10 59 Fair poor trunk taper Remove Layton Tree Consulting LLC For:Kushal Varma Site:13016 156th AVE SE - Renton Tree Summary Table Date: Condition - Tree/DBH Height Retention Tag #Species (inches)(feet)Suitability Comments Proposal N S E W Drip-Line (feet) 7/7/2020 100 Douglas fir 24 88 Good no concerns Remove 101 Douglas fir 19 78 Good no concerns Remove 102 Douglas fir 16 70 Good no concerns Remove 103 Douglas fir 7 28 Fair young, somewhat suppressed Remove 104 Douglas fir 12 45 Good young, no concerns Remove 105 Douglas fir 10 44 Good young, no concerns Remove 106 Douglas fir 7 37 Fair somewhat suppressed Remove 107 Douglas fir 6 23 Fair suppressed Remove 108 Douglas fir 25 90 Good no concerns Remove 109 Douglas fir 30 96 Good no concerns Remove 110 bigleaf maple 20 67 Poor trunk forks at 5 feet, weak attachment Remove 111 Douglas fir 22 84 Fair natural lean east Remove 112 Douglas fir 11 72 Fair poor taper, lean Remove 113 Douglas fir 11,8 (13)77 Fair forked trunk, subdominant Remove 114 Douglas fir 20 84 Fair natural lean southeast Remove 115 Douglas fir 18 84 10 12 8 8 Fair minor trunk wound Remove 116 Douglas fir 24 81 10 16 14 16 Fair minor broken top Remove 117 Douglas fir 7 43 Poor suppressed, in natural decline Remove 118 Douglas fir 23 85 Good minor crook Remove 119 shore pine 11 32 Fair multiple forks Remove 120 Western red cedar 14 35 Good young, no concerns Remove 121 Western red cedar 15 36 Good young, no concerns Remove 122 Douglas fir 11 40 Good young, no concerns Remove 123 Douglas fir 9 43 Good young, no concerns Remove 124 Western red cedar 16 37 Good young, no concerns Remove 125 Western red cedar 16 44 Good young, no concerns Remove 126 Western red cedar 16 42 Good young, no concerns Remove 127 Western red cedar 11 35 Good young, no concerns Remove 128 bigleaf maple 16 54 Fair trunk forks at 10 feet into multiple tops Remove 129 Western red cedar 29 20 Fair forked top Remove 130 Douglas fir 13 45 Good young, no concerns Remove 131 bigleaf maple 28 82 12 NA 10 14 Fair trunk covered in ivy Remove 132 Western red cedar 16 44 Good young, no concerns Remove Layton Tree Consulting LLC For:Kushal Varma Site:13016 156th AVE SE - Renton Tree Summary Table Date: Condition - Tree/DBH Height Retention Tag #Species (inches)(feet)Suitability Comments Proposal N S E W Drip-Line (feet) 7/7/2020 133 Western red cedar 13 40 8 NA 10 6 Good young, no concerns Save 134 Douglas fir 12,6 (13)59 8 NA 6 8 Fair forked trunk Save 135 Douglas fir 12 64 Poor forked top, splitting apart Remove 136 Douglas fir 11 64 7 8 8 8 Fair minor trunk bends Save 137 Western red cedar 11 36 8 7 7 7 Fair top foliage a little sparse Remove 138 Douglas fir 17 70 10 8 10 12 Fair forked top Remove 139 Douglas fir 8 52 6 6 5 8 Fair forked top Save 140 Douglas fir 13 65 8 10 8 8 Fair minor trunk bends Save 141 Douglas fir 16 72 13 12 8 12 Good young, no concerns Save 142 Douglas fir 12 57 12 9 10 7 Good young, no concerns Save 143 Douglas fir 11 59 12 8 8 8 Good young, no concerns Save 144 Douglas fir 7 38 7 5 5 8 Good young, no concerns Save 145 Douglas fir 10 57 10 8 10 10 Good young, no concerns Remove 146 Western red cedar 11 34 9 8 9 9 Good young, no concerns Save 147 Douglas fir 8 55 8 6 6 7 Fair poor trunk taper Save 148 Douglas fir 15 63 12 14 14 12 Good young, no concerns Save 149 Douglas fir 19 71 14 12 14 10 Good young, no concerns Save 150 Douglas fir 14 67 14 10 8 12 Good young, no concerns Save 151 Douglas fir 16 70 12 14 14 14 Good young, no concerns Save 152 Douglas fir 22 73 16 14 14 16 Fair forked top Save 153 Western hemlock 9,8 51 Poor 90% dead Remove 154 Western red cedar 23 56 11 9 14 12 Fair forked tops, moderate risk Save 155 bigleaf maple 9,8,8 (14)56 10 16 16 14 Fair small cluster, good vigor Save 156 Western red cedar 33 77 18 NA 16 16 Fair forked top, codominant stems Remove 157 Douglas fir 13 68 Good young, no concerns Remove 158 cherry plum 14,12,8 (20)52 Fair cluster, poor basal attachments Remove 159 silver maple 21 78 Fair trunk forks at 10 feet into 3 tops, moderate risk Remove 160 silver maple 9 55 Fair trunk forks at 4 feet, subdominant fork Remove 161 Douglas fir 29 90 18 NA 18 16 Fair good vigor, wind sail pruned in past Save 162 Western red cedar 34 80 17 NA 18 16 Fair forked top, good vigor Save 163 bigleaf maple 30 89 12 NA 20 22 Fair trunk forks at 4 feet, codominant stems Save 164 Douglas fir 19 91 10 NA 8 12 Good sound, good vigor Save 165 bigleaf maple 22 86 14 NA 20 20 Fair trunk forks at 9 feet, codominant stems Save Layton Tree Consulting LLC For:Kushal Varma Site:13016 156th AVE SE - Renton Tree Summary Table Date: Condition - Tree/DBH Height Retention Tag #Species (inches)(feet)Suitability Comments Proposal N S E W Drip-Line (feet) 7/7/2020 166 paperbark maple 8,7,5 (12)38 8 6 18 18 Fair somewhat suppressed, moderate deadwood Remove 167 giant sequoia 45 82 Good no concerns Remove 168 Siberian elm 28,17 (33)73 Fair decent form, leaf minor infestation Remove 169 Western red cedar 14 44 12 NA 10 12 Good young, no concerns,somewhat suppressed Save 170 English walnut 15 50 26 15 16 12 Fair asymmetric crown to north Remove 171 Douglas fir 29 98 12 NA 14 12 Fair cambial rupture on lower trunk, good vigor Save 172 flowering cherry 14 38 13 NA 16 16 Fair south stem with extensive decay, low risk Save 173 white fir 19 86 10 NA 10 10 Good decent vigor Save 174 Douglas fir 23 90 Fair significant crook, fork Remove 175 Douglas fir 22 88 Good natural lean north Remove 176 bigleaf maple 22 82 Fair forked top, codominant stems,weak attachment Remove 177 black locust 11,7 (13)48 4 20 10 10 Fair leans south over neighbor house Save 178 European white birch 12 40 Poor dead, broken top, in decline Remove 179 European white birch 13 40 Poor dead, broken top, in decline Remove 180 Douglas fir 26 92 12 NA 12 10 Good good form, good vigor Remove 181 Douglas fir 9 48 9 NA 6 5 Fair suppressed, bent top Remove 182 Western red cedar 8 68 9 NA 9 8 Fair sparse top foliage Save 183 Douglas fir 23 97 8 NA 8 10 Good no concerns Save 184 Western red cedar 11 42 7 NA 8 8 Good somewhat suppressed Save 185 Douglas fir 18 91 10 NA 8 8 Good no concerns Remove 186 Douglas fir 12 85 8 NA 6 7 Fair poor taper, decent vigor Save 187 Douglas fir 28 94 10 NA 10 14 Good good vigor, slight natural lean south Save 188 Douglas fir 25 90 Good no concerns Remove 189 Western red cedar 22 73 Fair sparse top foliage Remove 190 Western red cedar 23,20 (30)76 Fair double trunk, good vigor Remove 191 bigleaf maple 24 92 Fair typical form Remove 192 Pacific madrone 7 14 Poor leans entirely over neighbor property Remove 193 Western red cedar 16 45 Poor dead top, 70% dead Remove 194 Pacific madrone 14 40 Fair leans entirely over neighbor property Remove 195 bigleaf maple 31 78 Fair typical form Remove 196 Douglas fir 10 51 Fair suppressed Remove 197 Siberian spruce 13 44 Poor topped in past, multiple tops Remove 198 Douglas fir 18 68 Fair suppressed by maple Remove Layton Tree Consulting LLC For:Kushal Varma Site:13016 156th AVE SE - Renton Tree Summary Table Date: Condition - Tree/DBH Height Retention Tag #Species (inches)(feet)Suitability Comments Proposal N S E W Drip-Line (feet) 7/7/2020 501 Douglas fir 28 80 NA 14 14 12 Good approx 3 feet off fence Protect 502 Western red cedar 31 73 NA 10 16 12 Fair forked top,approx 3 feet off fence Protect 503 Douglas fir 38 92 16 NA 20 16 Fair old broken top, ivy covered root crown Protect 504 Douglas fir 18 70 7 NA 8 10 Good close to fence, natural lean south Protect 505 Western red cedar 11,8,7 35 6 NA 10 8 Good approx 4 feet off fence Protect 506 English holly 7 25 4 NA 6 8 Fair approx 3 feet off fence Protect 507 English hawthorn 10 30 0 NA 5 5 Fair approx 3 feet off fence, crown all leans south Protect 508 Western red cedar 7,4,4 30 4 NA 10 4 Fair sparse top foliage Protect 509 Western red cedar 10 40 Fair sparse top foliage Remove 510 bigleaf maple 38 75 Fair moderate trunk decay Remove 511 Scots pine 28 70 Fair natural lean north, crook Remove 512 bigleaf maple 16,14,14,7 70 Fair small cluster, moderate decay Remove 513 Scots pine 23 58 Fair unusual form, decent vigor Remove 514 white spruce 19 72 Good sound, good vigor Remove 515 Douglas fir 28 80 Good no concerns Remove 516 Douglas fir 25 75 Fair forked top Remove Drip-Line measurements from face of trunk Measurements for neighboring trees from property line Calculated DBH: the DBH is parenthesis is the square root of the sum of the dbh for each individual stem squared (example with 3 stems: dbh = square root [(stem1)2 +(stem2)2 +(stem3)2 ]). NEIGHBORING TREES DEPARTMENT OF COMMUNITY AND ECONOMIC DEVELOPMENT TREE RETENTION WORKSHEET Planning Division 1055 South Grady Way-Renton, WA 98057 Phone: 425-430-7200 | www.rentonwa.gov 1.Total number of trees over 6” diameter1, or alder or cottonwood trees at least 8” in diameter on project site trees 2.Deductions: Certain trees are excluded from the retention calculation: Trees that are dangerous2 trees Trees in proposed public streets trees Trees in proposed private access easements/tracts trees Trees in critical areas3 and buffers trees Total number of excluded trees: trees 3.Subtract line 2 from line 1:trees 4.Next, to determine the number of trees that must be retained4, multiply line 3 by: 0.3 in zones RC, R-1, R-4, R-6 or R-8 0.2 in all other residential zones 0.1 in all commercial and industrial zones trees 5.List the number of 6” in diameter, or alder or cottonwood trees over 8” in diameter that you are proposing5 to retain4:trees 6.Subtract line 5 from line 4 for trees to be replaced: (if line 6 is zero or less, stop here. No replacement trees are required) trees 7.Multiply line 6 by 12” for number of required replacement inches:inches 8.Proposed size of trees to meet additional planting requirement: (Minimum 2” caliper trees required for replacement, otherwise enter 0)inches per tree 9.Divide line 7 by line 8 for number of replacement trees6: (If remainder is .5 or greater, round up to the next whole number) trees 1 Measured at 4.5’ above grade. 2 A tree certified, in a written report, as dead, terminally diseased, damaged, or otherwise dangerous to persons or property by a licensed landscape architect, or certified arborist, and approved by the City. 3 Critical areas, such as wetlands, streams, floodplains and protected slopes, are defined in RMC 4-3-050. 4 Count only those trees to be retained outside of critical areas and buffers. 5 The City may require modification of the tree retention plan to ensure retention of the maximum number of trees per RMC 4-4-130H7a. 6 When the required number of protected trees cannot be retained, replacement trees, with at least a two-inch (2") caliper or an evergreen at least six feet (6') tall, shall be planted. See RMC 4-4-130.H.1.e.(ii) for prohibited types of replacement trees. 1 H:\CED\Data\Forms-Templates\Self-Help Handouts\Planning\Tree Retention Worksheet.docx 08/2015 Minimum Tree Density A minimum tree density shall be maintained on each residentially zoned lot (exempting single-family dwellings in R-10 and R-14). The tree density may consist of existing trees, replacement trees, or a combination. Detached single-family development7: Two (2) significant trees8 for every five thousand (5,000) sq. ft. of lot area. For example, a lot with 9,600 square feet and a detached single-family house is required to have four (4) significant trees or their equivalent in caliper inches (one or more trees with a combined diameter of 24”). This is determined with the following formula: Multi-family development (attached dwellings): Four (4) significant trees8 for every five thousand (5,000) sq. ft. of lot area. Example Tree Density Table: Lot Lot size Min significant trees required New Trees Retained Trees Compliant 1 5,000 2 2 @ 2” caliper 0 Yes 2 10,000 4 0 1 tree (24 caliper inches) Yes 3 15,000 6 2 @ 2” caliper 1 Maple – 15 caliper inches 1 Fir – 9 caliper inches. Yes 7 Lots developed with detached dwellings in the R-10 and R-14 zoned are exempt from maintaining a minimum number of significant trees onsite, however they are not exempt from the annual tree removal limits. 8 Or the gross equivalent of caliper inches provided by one (1) or more trees. 2 H:\CED\Data\Forms-Templates\Self-Help Handouts\Planning\Tree Retention Worksheet.docx 08/2015 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% or 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. 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. 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 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 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. APPROVED TREE LIST – Small, Medium, and Large H:\CED\Data\Forms-Templates\Self-Help Handouts\Planning\treeslist_march2010.doc P. 6 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. 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. 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’. APPROVED TREE LIST – Small, Medium, and Large H:\CED\Data\Forms-Templates\Self-Help Handouts\Planning\treeslist_march2010.doc P. 9 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’. 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'. 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. 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'. 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.