The URL can be used to link to this page

Home My WebLink AboutEX_26_TR_Arborist_Report_250507_v1 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 RETENTION / PROTECTION PLAN 19505 & 19415 108th Avenue SE Renton, WA Report Prepared by: Bob Layton Registered Consulting Arborist #670 Certified Arborist #PN-2714A July 24, 2024 Updated February 7, 2025 Arborist Report – 19505 & 19415 108th Ave SE Page 2 Layton Tree Consulting LLC July 24, 2024 Updated February 7, 2025 Table of Contents Assignment.................................................................................................................................................... 3 Description .................................................................................................................................................... 3 Methodology ................................................................................................................................................. 3 Judging Condition...................................................................................................................................... 4 Observations ................................................................................................................................................. 4 Discussion/Recommendations ...................................................................................................................... 5 General Tree Protection Measures ............................................................................................................... 6 Tree Density-Tree Replacement ................................................................................................................... 6 Arborist Disclosure Statement ...................................................................................................................... 7 Attachments Photos, pages 8 - 21 Tree Summary Tables Tree Locator/Conditions Map Tree Plan Map Tree Retention/Credit Worksheet City of Renton – Approved Tree List Arborist Report – 19505 & 19415 108th Ave SE Page 3 Layton Tree Consulting LLC July 24, 2024 Updated February 7, 2025 Assignment Layton Tree Consulting, LLC was asked to compile an Arborist Report for two contiguous properties in Renton, located at 19505 and 19415 108th Avenue SE. The purpose of the report is to satisfy City requirements regarding tree retention regulations associated with the proposed re-development 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. Properties subject to an active land development permit shall retain a minimum of thirty percent (30%) of all significant trees on site. Date of Field Examination: October 11, 2023 Description Most of the property is open and covered in grasses. Trees exist mostly in groupings, scattered around the properties. 64 trees that meet the size requirements for a significant tree were identified on the property. A significant tree is any tree with a caliper of at least 6-inches or alder or cottonwood tree at least 8-inches. Trees certified as high-risk shall not be considered significant. Trees have been marked with a numbered aluminum tag, attached to the lower trunk. Tree tag numbers correspond with the numbers on the attached Tree Summary Tables and maps. There are few off-site or neighboring tree issues associated with this property. Only three off-site trees were assessed, Trees #21, #25 and #102. These are located within a proximity of the north, west and south property lines. There does not appear to be any trees within the right-of-way of 108th Avenue SE. 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 – 19505 & 19415 108th Ave SE Page 4 Layton Tree Consulting LLC July 24, 2024 Updated February 7, 2025 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, 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 The attached Tree Summary Table provides specific information on tree sizes and dripline measurements. Observations Much of the property is open and covered in grasses. Trees mainly exist in groupings, scattered around the property. Most are on the south or 19505 property. The majority of trees are evergreen or coniferous. Species include several native Douglas fir, several native Western red cedar, several ponderosa pine, a shore pine, Austrian pine, Norway spruce, Colorado spruce, Sitka spruce, Lawson cypress and Western hemlock. Seven of the 64 subject trees are in a poor condition and considered non-viable. Noteworthy observations are discussed as follows. Trees #6 and #22 are young, native bigleaf maples. Both are in decline, evident by dead cambium and significant crown dieback. The bacterial disease Xylella fastidosa is suspected. Continued decline is expected. Tree #23 is another young bigleaf maple. It has developed very poor structural form. It is not sustainable long-term. Tree #34 is a young plum variety. It has developed very poor structural form. It is not sustainable long- term. Trees #36 and #40 are semi-mature native Western red cedar. Both have been significantly impacted by past drought stress or unusually hot and dry summer conditions. This is evident by dead tops and very sparse foliage. #40 is 90% dead. These are not sustainable long-term. Tree #57 is a mature plum variety. It has an advanced Ganoderma infection at the root crown, evident by large fruiting bodies or conks of the fungus at the base of the tree. It is not sustainable long-term. Arborist Report – 19505 & 19415 108th Ave SE Page 5 Layton Tree Consulting LLC July 24, 2024 Updated February 7, 2025 Off-site/Neighboring Trees Tree #21 is a semi-mature to mature cluster of native bigleaf maple, located a few feet off of the north property line. It has large exposed surface roots that extend onto the subject property. It has an incipient Ganoderma infection, see picture below. Overall condition is rated as ‘fair’. Tree #25 is a young to semi-mature bigleaf maple, located on the west property line. This is a boundary line tree. It has a forked trunk with codominant (equal diameter) stems or tops. The forked attachment appears sound. Overall condition is rated as ‘fair’. Tree #202 is a semi-mature to mature native Western white pine. It has developed good structural form and is of good vigor. Discussion/Recommendations 64 trees that meet the size requirements for a significant tree were identified on the property. A significant tree is any tree with a caliper of at least 6-inches or alder or cottonwood tree at least 8-inches. Trees certified as high-risk or non-viable shall not be considered significant. Seven of the subject trees are in a poor condition and in a state of ultimate decline, and therefore considered non-significant. There are a total of 57 significant trees on the property. The vast majority of trees are located within the site interior and will be compromised by new construction and required utilities. Only three trees are suitably-positioned for successful preservation. This is the small grove in the southeast corner of the property, Trees #60, #61 and #62. Position tree protection at the dripline as shown on the attached map, prior to the start of work. No grading shall be allowed within the dripline areas. Position tree protection fencing around boundary line Tree #25 as shown on the attached map. No grading shall be allowed within the dripline area. Neighboring Tree 3102 will be protected by the retention of on-site trees. Neighboring Tree #21 is close to the proposed new access road. It will be majorly impacted by retaining wall construction. Root removal on the south side will likely jeopardize the trees’ structural stability and long-term health. There are multiple large surface roots that extend well beyond the property line. The removal and replacement of this tree is recommended to abate future issues. General Tree Protection Guidelines Tree protection fencing shall be positioned around any retained and/or protected trees prior to site demolition or bringing any heavy equipment onto the site. This will help to define clearing limits and protect soils and surface roots. Any roots damaged during site work outside of the tree protection fenced area 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. This will help roots to seal off potential decay and allow them to sprout new growth. Any disturbed areas near protected trees shall be watered weekly during the dry Arborist Report – 19505 & 19415 108th Ave SE Page 6 Layton Tree Consulting LLC July 24, 2024 Updated February 7, 2025 season of June through September. This will help to create a favorable environment for new root growth and reduce the overall stress associated with root loss and disturbance. Simply finish the landscape within the driplines by maintaining the existing lawn or covering the ground with a 3 to 4-layer of organic mulch. Maintain the existing grades inside tree protection areas. Keep large plantings, irrigation trenching and construction of hardscapes outside of tree protection areas. All landscape work within the tree protection zone shall be completed by hand-labor only. General Tree Protection Measures The following guidelines are recommended to ensure that the designated space set aside for the retained trees is protected and construction impacts are kept to a minimum. Tree Protection Standards have been set forth under RMC 4-4-130 H. Performance Standards for Land Development/Building Permits; 9. Protection Measures During Construction. Review this code section prior to the start of work. • Tree protection fencing shall be erected per prior to moving any heavy equipment on site. Doing this will set clearing limits and avoid compaction of soils within root zones of retained trees. • Excavation limits shall be laid out in paint on the ground to avoid over excavating. • To establish sub grade for foundations, curbs and pavement sections near the trees, soil should be removed parallel to the roots and not at 90-degree angles to avoid breaking and tearing roots that lead back to the trunk within the drip-line. Any roots damaged during these excavations should be exposed to sound tissue and cut cleanly with a saw. • Areas excavated within the drip-line of retained trees should be thoroughly irrigated weekly during dry periods. • Preparations for final landscaping shall be accomplished by hand within the drip-lines of retained trees. Large equipment shall be kept outside of the tree protection zones at all times. Tree Density-Tree Replacement H. PERFORMANCE STANDARDS FOR LAND DEVELOPMENT PERMITS: 1. Protected Trees: Trees required to be retained or planted pursuant to this subsection H1 are considered protected trees, as defined in RMC 4-11-200, Definitions T. Protected trees shall be retained or planted as follows: a. Minimum Tree Retention Requirements: Properties subject to an active land development permit shall retain a minimum of thirty percent (30%) of all significant trees on site. There are a total of 57 healthy significant trees on the property, requiring the retention of 17 trees. The proposal is to retain 3 of the 57 existing significant trees on the property, which equates to 5%. Arborist Report – 19505 & 19415 108th Ave SE Page 7 Layton Tree Consulting LLC July 24, 2024 Updated February 7, 2025 b. Tree Credit Requirements: With the exception of interior remodels not involving any building addition, removal of trees, or alteration of impervious areas, properties subject to an active land development permit shall comply with all of the following minimum tree credit requirements, and apply the tree credit value table in subsection H1bv of this Section: i. Tree credit requirements shall apply at a minimum rate of thirty (30) credits per net acre. ii. Either tree retention or a combination of tree retention and supplemental tree planting (with new small, medium, or large tree species) shall be provided to meet or exceed the minimum tree credits required for the site. See the attached ‘Tree Retention and Credit Worksheet’ Tree Credits to be retained = 26 Replacement Tree Credits required in lieu of 30% retention = 157 Because the proposal falls short of 30% retention of significant trees, 157 replacement tree credits will be required. This will involve the planting of 28 new small species, 70 new medium species and 40 new large species, per the attached worksheet. Consult with a landscape architect to develop an appropriate tree replacement plan for the project. 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 – 19505 & 19415 108th Ave SE Page 8 Layton Tree Consulting LLC July 24, 2024 Updated February 7, 2025 Photo Documentation Trees #1 > #12 between driveway and the 108th Ave sidewalk Trees #1 > #12 between driveway and the 108th Ave sidewalk Arborist Report – 19505 & 19415 108th Ave SE Page 9 Layton Tree Consulting LLC July 24, 2024 Updated February 7, 2025 Trees #1 > #5 Trees #10, #11 and #12 Arborist Report – 19505 & 19415 108th Ave SE Page 10 Layton Tree Consulting LLC July 24, 2024 Updated February 7, 2025 Trees #13 and #14 Tree #15 Arborist Report – 19505 & 19415 108th Ave SE Page 11 Layton Tree Consulting LLC July 24, 2024 Updated February 7, 2025 Trees #16 > #19 on north perimeter, Tree #20 in background left Looking east down north property line, Tree #19 in foreground Arborist Report – 19505 & 19415 108th Ave SE Page 12 Layton Tree Consulting LLC July 24, 2024 Updated February 7, 2025 Tree #21 on neighboring property to north Base of #21, incipient Ganoderma infection (arrow) Arborist Report – 19505 & 19415 108th Ave SE Page 13 Layton Tree Consulting LLC July 24, 2024 Updated February 7, 2025 Tree #22 Trees #23 (right), #24 (center) and #25 on left Arborist Report – 19505 & 19415 108th Ave SE Page 14 Layton Tree Consulting LLC July 24, 2024 Updated February 7, 2025 Lower stems of #23 Tree #26 Arborist Report – 19505 & 19415 108th Ave SE Page 15 Layton Tree Consulting LLC July 24, 2024 Updated February 7, 2025 Trees #28 and #29 Upper crowns of Trees #35 > #37; #36 with dead tops Arborist Report – 19505 & 19415 108th Ave SE Page 16 Layton Tree Consulting LLC July 24, 2024 Updated February 7, 2025 Trees #37 > #42 Tree #40 on right, 90% dead Arborist Report – 19505 & 19415 108th Ave SE Page 17 Layton Tree Consulting LLC July 24, 2024 Updated February 7, 2025 Base of Tree #43, Schweinitizii infection (arrow) Base of Tree #54, Schweinitizii infection (arrow) Arborist Report – 19505 & 19415 108th Ave SE Page 18 Layton Tree Consulting LLC July 24, 2024 Updated February 7, 2025 Trees #47, #48 and #49 Trees #55 and #56 Arborist Report – 19505 & 19415 108th Ave SE Page 19 Layton Tree Consulting LLC July 24, 2024 Updated February 7, 2025 Base of Tree #57, advanced Ganoderma infection (arrow) Trees #58 and #59 Arborist Report – 19505 & 19415 108th Ave SE Page 20 Layton Tree Consulting LLC July 24, 2024 Updated February 7, 2025 Looking west down south property line, #62 in foreground Trees #60, #61, #62 and #102 in southeast corner Arborist Report – 19505 & 19415 108th Ave SE Page 21 Layton Tree Consulting LLC July 24, 2024 Updated February 7, 2025 Looking north down east perimeter, Tree #63 in foreground Looking north across front of property to Trees #1 > #14 Layton Tree Consulting LLC For:Windsor Court Site:19505 and 19415 108th AVE SE - Renton Tree Summary Table Date: Average Tree/DBH Height Dripline Tag #Species (inches)(feet)Radius Condition Comments Proposal 1 Douglas fir 20 75 12 Good at edge of rockery Remove 2 Douglas fir 14 65 8 Good interior tree Remove 3 Douglas fir 19 70 12 Good natural lean SW Remove 4 Douglas fir 13 65 6 Fair subdominant fork,interior tree Remove 5 ponderosa pine 13 60 8 Good no concerns Remove 6 bigleaf maple 8,6 (10)40 x Poor diseased, heavy lean east to street Remove 7 ponderosa pine 11 55 4 Fair suppressed, sparse foliage Remove 8 Douglas fir 21 75 14 Good at edge of driveway ,minor crook Remove 9 Douglas fir 13 70 8 Good minor crook Remove 10 ponderosa pine 10 40 6 Fair suppressed, asymmetric crown west Remove 11 ponderosa pine 12 60 8 Good interior tree,somewhat suppressed Remove 12 Douglas fir 17 73 12 Fair forked top,codominant stems Remove 13 Douglas fir 29 92 18 Good good form vigor Remove 14 Douglas fir 30 89 18 Good good form vigor Remove 15 ponderosa pine 19 65 16 Good subdominant forks Remove 16 ponderosa pine 21 68 14 Fair forked trunk, codominant stems,included bark Remove 17 ponderosa pine 13 50 12 Fair multiple forks Remove 18 ponderosa pine 20 56 14 Good good form vigor Remove 19 Douglas fir 29 85 16 Fair forked trunk, appears sound Remove 20 flowering cherry 17 30 10 Good routinely pruned Remove 22 bigleaf maple 13,9,9,8,6 (21)55 x Poor diseased, in decline Remove 23 bigleaf maple 6,6,6 (10)40 x Poor poor structural form,not sustainable Remove 24 Douglas fir 32 85 20 Good good form vigor Remove 26 bigleaf maple 13,13,12,10 (24)60 16 Fair entangled with wire fence Remove 27 flowering dogwood 8 22 10 Good no concerns Remove 28 Western red cedar 25,24,19,8 (40)75 16 Fair forked at base, natural lean east Remove 10/11/2023 Layton Tree Consulting LLC For:Windsor Court Site:19505 and 19415 108th AVE SE - Renton Tree Summary Table Date: Average Tree/DBH Height Dripline Tag #Species (inches)(feet)Radius Condition Comments Proposal 10/11/2023 29 Colorado spruce 23 70 12 Fair forked top,codominant stems Remove 30 ponderosa pine 19 38 10 Good good form vigor Remove 31 ponderosa pine 23 70 12 Good good form vigor Remove 32 ponderosa pine 15 58 10 Fair natural lean south, trunk sweep ,forked top Remove 33 plum 7 18 8 Fair typical Remove 34 plum 6,5 (8)14 x Poor poor structural form,not sustainable Remove 35 Douglas fir 23 78 12 Good old broken top,natural lean west Remove 36 Western red cedar 22,17,14 (31)68 x Poor dead tops, drought damage Remove 37 ponderosa pine 35,9 (36)101 16 Good natural lean Remove 38 ponderosa pine 15 66 10 Fair somewhat suppressed, good vigor Remove 39 Douglas fir 30 102 18 Good good form vigor Remove 40 Western red cedar 22 45 x Poor 90% dead, drought damage Remove 41 Douglas fir 11 26 8 Fair poor form,suppressed Remove 42 Lawson cypress 11,10,9 (17)45 10 Fair poor form, forked tops Remove 43 Douglas fir 36 105 18 Fair schweinitizii infection Remove 44 Douglas fir 15 60 10 Fair poor form, asymmetric crown west Remove 45 Western red cedar 21,17 (27)80 16 Fair double trunk ,good vigor Remove 46 black locust 11 68 12 Fair natural lean east,poor stem taper Remove 47 Western red cedar 28,20,11,8 (37)88 18 Fair large cluster, weak basal attachment, sparse top foliage Remove 48 Western red cedar 28,15,11,8 (35)88 16 Good decent form,good vigor Remove 49 Western hemlock 25,17 (30)85 18 Fair double trunk, included bark,decent vigor Remove 50 Sitka spruce 15 88 14 Good no concerns Remove 51 Western red cedar 15,12 (19)70 12 Fair forked top,codominant stems Remove 52 Western red cedar 15,10 (18)80 12 Fair forked trunk,weak attachment Remove 53 Western red cedar 17,16 (23)83 14 Fair forked trunk, codominant stems,included bark Remove 54 Douglas fir 30,17 (34)105 20 Fair schweinitizii infection Remove Layton Tree Consulting LLC For:Windsor Court Site:19505 and 19415 108th AVE SE - Renton Tree Summary Table Date: Average Tree/DBH Height Dripline Tag #Species (inches)(feet)Radius Condition Comments Proposal 10/11/2023 55 Douglas fir 30 100 18 Good sound, good form and vigor Remove 56 Douglas fir 30 95 18 Good minor old trunk wound Remove 57 plum 17,12 (21)36 x Poor advanced Ganoderma infection Remove 58 black locust 26,24 (35)61 18 Fair forked trunk,typical Remove 59 black locust 22,15 (27)64 16 Fair natural lean south Remove 60 Norway spruce 26 78 14 Good good form vigor Retain 61 Lawson cypress 11,8 (13)42 8 Good somewhat suppressed, good vigor Retain 62 Austrian pine 9,16,12,13,10 (27)66 14 Good large cluster, sound, good vigor, 10-inch stem leans to street Retain 63 shore pine 14 45 12 Good good form vigor Remove 64 Colorado spruce 22 55 12 Fair forked top,one broke,decent form Remove 65 cherry plum 9,5,5 (11)34 10 Good decent form and vigor Remove 101 black locust 8,5 (9)48 10 Fair poor stem taper Remove Neighboring/Off-site Trees 21 bigleaf maple 22,22,20,8 (38)75 24 Fair incipient Ganoderma infection, large exposed surface roots TBD 25 bigleaf maple 14 45 14 Fair forked trunk, codominant stems, sound, boundary tree Protect 102 Western white pine 36 83 16 Good good form and vigor Protect Dripline measurements from face of trunk 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 rentonwa.gov/permitcenter | planningcustomerservice@rentonwa.gov | 425-430-7294 10/6/2022 Page 1 of 3 CITY OF RENTON Ι PERMIT CENTER TREE RETENTION AND CREDIT WORKSHEET TREE RETENTION REQUIREMENTS A minimum retention of thirty percent (30%) of all significant trees (as defined in RMC 4-11-200) is required on site. Please complete the form below to verify compliance with minimum tree retention requirements. • Identify total number of trees 6-inch caliper or greater (or alder or cottonwood trees 8-inch caliper or greater) on site: Trees Trees Trees Trees Trees Trees Required Trees Proposed •Deductions – Certain trees are excluded from the retention calculation: o Trees that are high-risk, as defined in RMC 4-11-200: o Trees within existing and proposed public right-of-way: o Trees within wetlands, streams, very high landslide hazards, protected slopes, and associated buffers: •Total remaining trees after deductions: •Required tree retention (30%): •Identify number of trees proposed for retention: •Identify number of trees requested for replacement in lieu of retention (skip page 3 if no tree replacement is requested):Trees TREE CREDIT REQUIREMENTS Tree credit requirements apply at a minimum rate of thirty (30) credits per net acre. Complete the form below to determine minimum tree credit requirements. •Gross area of property in square feet: Square Feet •Deductions: Certain areas are excluded from tree credit calculation: o Existing and proposed public right-of-way: Square Feet o Wetlands, streams, very high landslide hazards, protected slopes, and associated buffers: Square Feet •Total excluded area:Square Feet •Net land area (after deductions) in square feet:Square Feet •Net land area (after deductions) in acres:Acres •Required tree credits:Tree Credits Required rentonwa.gov/permitcenter | planningcustomerservice@rentonwa.gov | 425-430-7294 10/6/2022 Page 2 of 3 TREE RETENTION AND CREDIT WORKSHEET PROPOSED TREE CREDITS Please complete the table below to calculate the total tree credits proposed for your project. Identify the quantity of trees for each tree category, after deducting trees within excluded areas, as shown in the previous section. TREE SIZE TREE CREDITS TREE QUANTITY TOTAL TREE CREDITS RETAINED TREES Preserved tree 6 – 9” caliper 4 Preserved tree 10 – 12” caliper 5 Preserved tree 12 – 15” caliper 6 Preserved tree 16 – 18” caliper 7 Preserved tree 19 – 21” caliper 8 Preserved tree 22 – 24” caliper 9 Preserved tree 25 – 28” caliper 10 Preserved tree 29 – 32” caliper 11 Preserved tree 33 – 36” caliper 12 Preserved tree 37” caliper and greater 13 NEW TREES New small species tree (30' or less at maturity) 0.25 New medium species tree (30' to 50' at maturity) 1 New large species tree (50' or more at maturity) 2 TREE CREDITS PROPOSED: rentonwa.gov/permitcenter | planningcustomerservice@rentonwa.gov | 425-430-7294 10/6/2022 Page 3 of 3 TREE RETENTION AND CREDIT WORKSHEET TREE REPLACEMENT JUSTIFICATION Replacement may be authorized as an alternative to 30% retention provided the removal is the minimum necessary to accomplish the desired purpose and provided the proposal meets one of the following options: a. There are special circumstances related to the size, shape, topography, location, or surroundings of the subject property; or b. The strict application of the code would prevent reasonable use of property; or c. The strict application of the code would prevent compliance with minimum density requirements of the zone; or d. The project is a short plat with four (4) or fewer lots. Please attach a written justification demonstrating compliance with the requirements and criteria as descripted above. TREE REPLACEMENT QUANTITY Tree replacement quantity is determined based on the credit value of the trees proposed for removal. Larger, higher priority trees shall be used for calculation of tree replacement. Identify the quantity of each tree requested to be removed in lieu of 30% retention, based on tree size. List the identification number of each tree, as indicated in the arborist report. TREE SIZE TREE CREDITS TREE QUANTITY TREE INDENTIFICATION # TOTAL TREE CREDITS Tree 37” caliper + 13 Tree 33 – 36” caliper 12 Tree 29 – 32” caliper 11 Tree 25 – 28” caliper 10 Tree 22 – 24” caliper 9 Tree 19 – 21” caliper 8 Tree 16 – 18” caliper 7 Tree 12 – 15” caliper 6 Tree 10 – 12” caliper 5 Tree 6 – 9” caliper 4 REPLACEMENT CREDITS REQUIRED: TREE REPLACEMENT PLANTING Identify the quantity of proposed new replacement trees (minimum size of 2-inch caliper). The total replacement credits proposed should be equal to or greater than the replacement credits required, as shown in the previous section. TREE SIZE TREE CREDITS TREE QUANTITY TOTAL TREE CREDITS New small species tree (30' or less at maturity) 0.25 New medium species tree (30' to 50' at maturity) 1 New large species tree (50' or more at maturity) 2 REPLACEMENT CREDITS PROPOSED: