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Home My WebLink AboutTR_SCT_TreeInventory_250114 Formerly DCG/Watershed SEATTLE | KIRKLAND | MOUNT VERNON | WHIDBEY ISLAND | FEDERAL WAY | SPOKANE facetnw.com February 26, 2025 Don Helling Huitt-Zollars 1700 7th Avenue, Suite 2075 Seattle, WA 98101 Soos Creek Trail Phase 5a Extension - Tree Inventory Report Facet Number: 2204.0231.00 Dear Don: We are pleased to present you with the findings of our tree inventory and assessment of the multiple properties located along the proposed Soos Creek Trail extension in the City of Renton (parcels #030550-0310, 133273-0840, 332305-9057, -9073, -9010, and 619960-0180). The enclosed report has been prepared to describe our inventory methods, summarize the tree inventory and assessment results, and outline local requirements for tree retention and/or replacement, based on the Scope of Work approved on November 25, 2024. Please reach out if you have any questions. Sincerely, Roen Hohlfeld Ecologist, ISA Certified Arborist® PN-8562A Tree Risk Assessment Qualified Email Enclosure Soos Creek Trail Phase 5a Extension - Tree Inventory Report Soos Creek Trail Phase 5a Extension Tree Inventory Report Don Helling; Huitt-Zollars Facet Number: 2204.0231.00 February 6, 2025 Introduction This report outlines the methods, findings, and regulatory implications of a tree inventory study completed along the proposed Soos Creek Trail extension in the City of Renton, WA (parcels #030550- 0310, 133273-0840, 332305-9057, - 9073, -9010, and 619960-0180). Sam Payne and Roen Hohlfeld, ISA Certified Arborists® with Facet, visited the study area on January 10, 15, and 31, 2025 to inventory and assess trees in the project area. The intent of the study was to screen for, identify, and assess any regulated trees that may be impacted by the proposed project. The following documents are provided at the end of the report:  Tree Inventory Table  Tree Inventory Map BACKGROUND Soos Creek Trail is a paved multi-use, non-motorized recreational trail, approximately 5.9 miles in length that follows Big Soos Creek along the Soos Creek Park and Trail corridor. The trail currently extends from a trailhead located at the intersection of 124th Ave NE and SE 192nd St, immediately south of the City of Renton, to the southern terminus located at the intersection of 148th Ave SE and SE 266th St in the City of Kent, near Lake Meridian Park. The Soos Creek Trail Phase 5a Extension project proposes extending the Soos Creek Trail north from its existing terminus at SE 192nd Street to SE 186th Street in the City of Renton. STUDY AREA The study area is located within Section 33 of Township 23 North, Range 05 East. It includes portions of six parcels in the City of Renton (parcels #030550-0310, 133273-0840, 332305-9057, -9073, -9010, and 619960-0180) that are located in proximity to the proposed Soos Creek Trail extension corridor (see Figure 1). These parcels are under ownership of King County Parks, City of Renton, Canyon Terrace HOA, and a private holder. The study area totals approximately 7.5 acres in size per King County Assessor. Parcel #3323059057 is zoned RC (Resource Conservation) by the City of Renton, with the five remaining parcels zoned R-4 (Residential 4 DU/Acre). Trees located on private property were assessed with access permission or from the nearest publicly accessible area; no private property was accessed without permission. TREE INVENTORY REPORT FEBRUARY 2025 FACET NUMBER: 2204.0231.00 SOOS CREEK TRAIL PHASE 5a EXTENSION / 2 Figure 1. Project area map, with study area outlined in yellow. EXISTING CONDITIONS The majority of the study area is used by Bonneville Power Administration (BPA) as a transmission line corridor. This portion of the study area is generally devoid of trees and is characterized by a large wetland area with low-growing vegetation such as Douglas spiraea (Spiraea douglasii), red osier dogwood (Cornus sericea), salal (Gaultheria shallon), and reed canarygrass (Phalaris arundinacea). Adjacent to the transmission line corridor forested conditions are dominant, with typical understory vegetation including Himalayan blackberry (Rubus armeniacus), beaked hazelnut (Corylus cornuta), and sword fern (Polystichum munitum). Trees in the study area are discussed in detail below (see Findings). Big Soos Creek is mapped just east of the study area, with upstream and downstream reaches extending into King County’s Soos Creek Park and Trail which consists of a large network of natural 0305500310 6199600180 3323059073 3323059010 1332730840 3323059057 SE 192nd St Boulevard Lane Park Meeker Middle School Existing trail terminus TREE INVENTORY REPORT FEBRUARY 2025 FACET NUMBER: 2204.0231.00 SOOS CREEK TRAIL PHASE 5a EXTENSION / 3 areas, forests, and wetlands. A residential neighborhood owned by Canyon Terrace HOA borders the western boundary of the study area. Meeker Middle School and associated playfield are located to the east of the study area. Methods and Definitions Regulated trees in the study area were identified and assessed in the field using a Basic Assessment according to International Society of Arboriculture (ISA) standards. Regulated off-site trees within approximately 15 feet of the study area or within the public right-of-way were also assessed. According to the Renton Municipal Code (RMC), regulated trees are defined as follows: RMC 4-11-200 - Significant Trees: Tree, Significant: A tree with a caliper of at least six inches (6"), except alder or cottonwood trees, which qualify as significant trees with a caliper of eight inches (8") or greater. Trees certified as high-risk shall not be considered significant. RMC 4-11-200 – Landmark Trees: A tree with a caliper of twenty four inches (24") or greater, except for big leaf maples, black cottonwoods, and red alder trees, which qualify as landmark trees with a caliper of thirty inches (30") or greater. RMC 4-11-030 – Caliper: The diameter of any tree trunk as measured at a height of four and one-half feet (4-1/2') above the ground on the upslope side of the tree. RMC 9-13-2.K – Street Tree: Any tree which is located within the improved or unimproved right-of-way in the City of Renton. All inventoried trees were assigned a unique identification (ID) number. Each assessed on-site tree (trees located on the subject property) was tagged with a 1.25-inch diameter aluminum tag labeled with the unique ID number that was affixed to the to the trunk at eye level. Off-site trees were assigned a digital ID number, but not tagged. In addition to the ID number, the following attributes were recorded for all inventoried trees:  Species Name (scientific and common).  Number of Stems.  Diameter. The diameter-at-breast-height (DBH) of all identified significant trees in the study area, was measured at 4.5 feet above the average surface of the ground. Because the City of Renton defines caliper as a measurement of a tree’s diameter at 4.5 feet above ground, DBH is used interchangably with caliper in this study. Methodology for measuring and calculating the diameter of trees with multiple trunks, major leans, or on steep slopes followed those outlined in the Guide for Plant Appraisal, 10th Edition, written by the Council of Tree and Landscape Appraisers (CTLA) and published by ISA (CTLA 2020). To measure trees with multiple trunks, the TREE INVENTORY REPORT FEBRUARY 2025 FACET NUMBER: 2204.0231.00 SOOS CREEK TRAIL PHASE 5a EXTENSION / 4 total diameter of multi-stemmed trees was calculated by taking the square root of the sum of each diameter squared; this allows for comparison to other single-stemmed trees and for more accurate permitting and tree retention calculations.  Estimated Height. Baseline measurements for tree heights were established using a Forestry Pro Laser Rangefinder from Nikon. The height of adjacent trees was visually estimated based on these measurements.  Estimated Canopy Radius. Canopy radius, also known as crown radius or dripline, was visually estimated horizontally from the center of the trunk to the outermost branch tips. For trees with uneven crowns, the average of two perpendicular radii was estimated.  Condition. A basic visual assessment was used to evaluate the health and condition of trees within the study area in accordance with ISA and CTLA standards. The condition determination was based on current health, structural integrity, and form of the tree, in addition to the characteristics of each species. Each tree was given an overall condition rating from Excellent to Very Poor as summarized in Table 1. Tree data and geospatial locations were collected in the field using an iPad with the ArcGIS Field Maps application. A tree inventory map showing the approximate locations and ID numbers of trees included in the inventory was provided to Huitt-Zollars to incorporate into the land survey. Table 1. Tree Condition Ratings (adapted from CTLA 2020). Rating Category Condition Components Percent Rating Health Structure Form Excellent - 1 High vigor and nearly perfect health with little or no twig dieback, discoloration, or defoliation. Nearly ideal and free of defects. Nearly ideal for the species. Generally symmetric. Consistent with the intended use. 81% to 100% Good - 2 Vigor is normal for species. No significant damage due to diseases or pests. Any twig dieback, defoliation, or discoloration is minor. Well-developed structure. Defects are minor and can be corrected. Minor asymmetries/ deviations from species norm. Mostly consistent with the intended use. Function and aesthetics are not compromised. 61% to 80% TREE INVENTORY REPORT FEBRUARY 2025 FACET NUMBER: 2204.0231.00 SOOS CREEK TRAIL PHASE 5a EXTENSION / 5 Rating Category Condition Components Percent Rating Health Structure Form Fair - 3 Reduced vigor. Damage due to insects or diseases may be significant and associated with defoliation but is not likely to be fatal. Twig dieback, defoliation, discoloration, and/or dead branches may compromise up to 50% of the crown. A single defect of a significant nature or multiple moderate defects. Defects are not practical to correct or would require multiple treatments over several years. Major asymmetries/deviations from species norm and/or intended use. Function and/or aesthetics are compromised. 41% to 60% Poor - 4 Unhealthy and declining in appearance. Poor vigor. Low foliage density and poor foliage color are present. Potentially fatal pest infestation. Extensive twig and/or branch dieback. A single serious defect or multiple significant defects. Recent change in tree orientation. Observed structural problems cannot be corrected. Failure may occur at any time. Largely asymmetric/abnormal. Detracts from intended use and/or aesthetics to a significant degree. 21% to 40% Very Poor - 5 Poor vigor. Appears dying and in the last stages of life. Little live foliage. Single or multiple severe defects. Failure is probable or imminent. Visually unappealing. Provides little or no function in the landscape. 6% to 20% Dead - 6 0% to 5% Findings A total of 152 trees were assessed within the study area. Of those trees, 136 trees meet the City of Renton’s criteria for a significant tree. Sixteen additional trees located along 124th Ave SE do not meet minimum size criteria for significant trees. Significant trees include 13 species, 11 of which are native to the Puget Sound region. Ten significant trees inventoried were evergreen, including Douglas-fir (Pseudotsuga menziesii), Western red cedar (Thuja plicata), and western hemlock (Tsuga heterophylla), representing approximately 7% of inventoried significant trees. Red alder (Alnus rubra) is the most common species, comprising approximately one third of the significant trees with 45 individuals inventoried. Scouler’s willow (Salix scouleriana), black cottonwood (Populus balsamifera), and bitter cherry (Prunus emarginata) are the next most common species, with 25, 15 and 13 individuals inventoried, respectively. Overall, the average DBH of significant trees is 11.9-inches. The largest tree included in the inventory is a bigleaf maple (Acer macrophyllum) with a DBH of 45.3-inches, although assessed to be in poor condition. This tree and seven others including two black cottonwood, three Douglas-fir, and two Scouler’s willow are considered Landmark trees in the City of Renton. TREE INVENTORY REPORT FEBRUARY 2025 FACET NUMBER: 2204.0231.00 SOOS CREEK TRAIL PHASE 5a EXTENSION / 6 The majority of significant trees, representing approximately 65% of those inventoried, were determined to be in good condition. Twenty-one significant trees, including 16 red alder and bitter cherry, were assessed to be in poor or very poor condition due to the presence of significant defects such as extensive branch dieback, decay, or dead leaders. Seven of the 16 non-significant street trees inventoried were assessed to be in fair or poor condition, generally resulting from the presence of large trunk wounds. A summary of tree attributes is provided in Table 2, below. See the Tree Inventory Table for a complete list of inventoried trees and associated attributes. Table 2. Tree Attribute Summary. Species Quantity Significant Quantity Landmark Average DBH (inches) Largest DBH (inches) Notes Acer circinatum (vine maple) 10 0 8.4 12.3 Multi-stem trees with 13 stems on average. Acer macrophyllum (bigleaf maple) 9 1 15.2 45.3 Acer palmatum (Japanese maple) 2 0 18.4 23.5 Acer rubrum (red maple) 3 0 10.9 12.6 Alnus rubra (red alder) 45 0 11.5 26.0 Ten trees in poor or very poor condition. Carpinus caroliniana (American hornbeam) 0 0 3.7 5.0* Nine non-significant street trees inventoried. Crataegus douglasii (black hawthorn) 1 0 n/a 10.4 Populus balsamifera (black cottonwood) 15 2 15.7 39.6 Prunus emarginata (bitter cherry) 13 0 8.3 10.0 Six trees in poor or very poor condition. Pseudotsuga menziesii (Douglas-fir) 8 3 17.5 36.0 Pyrus calleryana (Callery pear) 0 0 2.0 2.0 Two non-significant street trees inventoried. Rhamnus purshiana (cascara) 3 0 7.0 7.2 Salix scouleriana (Scouler’s willow) 25 2 10.6 25.8 Multi-stem trees with 8 stems on average. Thuja plicata (Western red cedar) 1 0 n/a 11.8 Tilia americana (American basswood) 0 0 4.0 4.0 Five non-significant street trees inventoried. Tsuga heterophylla (Western hemlock) 1 0 n/a 20.2 TREE INVENTORY REPORT FEBRUARY 2025 FACET NUMBER: 2204.0231.00 SOOS CREEK TRAIL PHASE 5a EXTENSION / 7 Species Quantity Significant Quantity Landmark Average DBH (inches) Largest DBH (inches) Notes Overall / Total 136 8 11.9* 45.3 *Overall average DBH does not include non-significant trees assessed in the inventory. Regulations Generally, trees in the City of Renton are regulated under Renton Municipal Code (RMC) Section 4-4- 130 Tree Retention and Land Clearing Regulations. Additionally, street trees are regulated under RMC Chapter 13 Street Trees. Trees and other vegetation located in critical areas or associated buffers are regulated under RMC Section 4-3-050 Critical Area Regulations. TREE RETENTION Per RMC 4-11-200, tree removal is defined as “the removal of a tree, through either direct or indirect actions, including but not limited to: (1) clearing, damaging or poisoning resulting in a high-risk tree; (2) removal of more than forty percent (40%) of the live crown; or (3) damage to roots or trunk that is likely to destroy the tree’s structural integrity.” Tree removals proposed to occur with land development generally require authorization by a land development permit. Per RMC 4-4-130.H.1.a., land development permits require that a minimum of 30% of all significant trees on a site be retained; a site is defined as “a single lot, or two (2) or more contiguous lots that, under common ownership or documented legal control, were developed or are part of a development proposal” (RMC 4-11-190). Additionally, a minimum of 30 tree credits, as established with the tree credits table replicated in Table 3 below, must be retained per net acre (RMC 4-4-130.H.1.b.i). TREE INVENTORY REPORT FEBRUARY 2025 FACET NUMBER: 2204.0231.00 SOOS CREEK TRAIL PHASE 5a EXTENSION / 8 Table 3. RMC 4-4-130.H.1.b.v. Tree Credits. Table 4. RMC 4-4-130.H.1.c. Retention Priorities. Additionally, the City of Renton requires that the retention of trees is prioritized based upon specific criteria as detailed on the tree retention priorities table replicated in Table 4, above (RMC 4-4- 130.H.1.c). Per RMC 4-4-130.H.1.c, when Priority One trees are not proposed for retention the following must be demonstrated: (i) all reasonable efforts have been taken to preserve trees utilizing the highest priority possible, (ii) that retention of higher priority trees is not feasible or practical for the project site, and (iii) that the project proposal meets or exceeds the purposes and intent of this Section. TREE INVENTORY REPORT FEBRUARY 2025 FACET NUMBER: 2204.0231.00 SOOS CREEK TRAIL PHASE 5a EXTENSION / 9 These tree retention requirements apply only to the developable area, which excludes critical areas, buffer, and the public right-of-way. Tree retention calculations also exclude public trails, assuming trail design retains Priority One trees. Per RMC 4-4-130.D.3 and .4, proposed removal of trees and other vegetation located within critical areas and buffers or in Native Growth Protection Areas are subject to RMC 4-3-050. Pursuant RMC 4-3-050.B, the construction of new trails is an exempt activity in wetlands and buffers (RMC 4-3-050.C.3). However, exempt activities that require the removal of trees or other vegetation would require mitigation. See Soos Creek Trail Phase 5a Extension Wetland and Stream Delineation Report - City of Renton for additional information regarding vegetation retention and mitigation requirements in critical areas and associated buffers. Trees located within the right-of-way, regardless of size, are regulated as street trees. Per RMC 9-13-5 and -6, the removal or injury of street trees, or disturbance within the dripline is generally prohibited. However, the construction of walkways and bikeways in improved public right-of-ways or easements are allowed tree removal activities that can be permitted with restoration of disturbed areas (RMC 4-4- 130.C.12). TREE REPLACEMENT Tree replacement, or supplemental planting, is required when it can be demonstrated that the tree retention requirements described above cannot be met, that proposed tree removals and replacements are minimum, and when the following criteria are met (RMC 4-4-130.H.1.b.ii and RMC 4-4-130.H.1.e.i): (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. The quantity of replacement trees required is based upon total tree credits of removed trees; however, replacement trees alone cannot be used to meet tree credits requirements (RMC 4-4-130.H.1.e.ii.). Per RMC 4-4-130.H.1.b.iii, supplemental deciduous trees shall be 2-inch caliper or larger and supplemental evergreen trees shall be six feet tall or greater (RMC 4-4-130.H.1.b.iii and RMC 4-4-130.H.1.e.ii). Street trees that are removal with permit approval require replacement at a 1:1 ratio, with tree selection and planting conforming to requirements in RMC 4-4-070 Landscaping (RMC 9-13-8). SIGNIFICANT TREE PROTECTION Protected trees include those identified for retention, as well as required supplemental trees (RMC 4-11- 200). Adjacent off-site trees shall be retained and protected unless written permission is obtained from the owner and the tree removal is allowable per RMC 4-4-130.C (RMC 4-4-130.H.10). Per RMC 4-4- 130.H.10, all of the following tree protection measures during construction are required for trees proposed for retention: a. Temporary Tree Protection Fencing: Prior to development activities, the applicant shall erect and maintain a six-foot (6') high, post-driven, chain-link temporary construction fence around TREE INVENTORY REPORT FEBRUARY 2025 FACET NUMBER: 2204.0231.00 SOOS CREEK TRAIL PHASE 5a EXTENSION / 10 the drip lines of all retained trees, or if a tree protection tract or easement is provided, along the perimeter of the tree protection tract or easement. The temporary tree protection fencing shall be installed with steel posts driven at a depth that will adequately ensure the fence remains in an upright position for the duration of the development. The temporary tree protection fencing shall not be disturbed, removed, or relocated until the conclusion of construction activities. Protected trees may be fenced individually or in groups of trees. Individual trees shall be fenced on four (4) sides. If some tree or vegetation removal is necessary in order to gain access to retained trees for the purposes of installing temporary tree protection fencing, the applicant shall submit a phased tree removal plan for review and approval by the Administrator, prior to all development activities. b. Tree Protection Signage: Signage shall be placed on the tree protection fencing at intervals of no more than twenty feet (20') along the entirety of the protective tree fence. The sign(s) shall be designed, constructed, and installed in accordance with official specifications provided by the Administrator and shall convey the information deemed necessary by the Administrator. c. Construction Storage Prohibited: The applicant may not fill, excavate, stack, or store any equipment, dispose of any materials, supplies or fluids, operate any equipment, or compact the earth in any way within the area defined by the drip line of any tree to be retained. d. Protection From Grade Changes: If the grade level adjoining to a tree to be retained is to be raised, the applicant shall construct a dry rock wall or rock well around the tree. The diameter of this wall or well must be equal to the tree drip line. e. Impervious Surfaces Prohibited Within the Drip Line: The applicant may not install impervious surface material within the area defined by the drip line of any tree to be retained, unless otherwise approved by the City. (Ord. 5958, 12-9-2019) f. Utilities Prohibited Within the Drip Line: The applicant may not install utilities within the area defined by the drip line of any tree to be retained, unless otherwise approved by the City. g. Restrictions on Grading Within the Drip Lines of Retained Trees: The grade level around any tree to be retained may not be lowered within the greater of the following areas: (i) the area defined by the drip line of the tree, or (ii) an area around the tree equal to one and one-half feet (1-1/2') in diameter for each one inch (1") of tree caliper. A larger tree protection zone based on tree size, species, soil, or other conditions may be required. (Ord. 5676, 12-3-2012) h. Vegetation and Undergrowth Protection: With the exception of invasive species removal which has received prior written approval from the City, removal of the existing vegetation within the drip line of protected trees is prohibited during development activities. Native understory trees, shrubs, and other vegetation shall be protected within the designated tree protection area for the duration of the development activities. All areas within the required fencing shall be covered evenly with a minimum of three inches (3") of bark mulch prior to installation of the protective fencing, except in areas where mulch will adversely affect protected ground cover plants. (Ord. 5676, 12-3-2012) TREE INVENTORY REPORT FEBRUARY 2025 FACET NUMBER: 2204.0231.00 SOOS CREEK TRAIL PHASE 5a EXTENSION / 11 i. Monitoring Required During Construction: For all protected trees required to be retained in compliance with a land use decision, the applicant shall retain an ISA certified arborist or ASCA certified consultant to ensure trees are protected from development activities and/or to prune branches and roots, fertilize, and water as appropriate for any trees and ground cover that are to be retained. The ISA certified arborist or ASCA certified consultant shall supervise the installation of any required tree protection fencing, permanent or temporary. j. Alternative Protection: Alternative safeguards may be used if determined by the Administrator that such safeguards would provide equal or greater tree protection. STREET TREE PROTECTION The City of Renton provides additional tree protection measures for street trees as follows per RMC 9- 13-6.D: Construction Near Street Trees: Damage to street trees, including their root systems is prohibited. Construction activity within critical root zone of street trees shall be conducted using only hand equipment whenever such work will affect the tree, unless authorized in writing by the City arborist. 1. Roots: Roots greater than two inches (2”) in diameter shall not be severed without prior approval of the City arborist; other roots must be cleanly cut so that the bark and wood of the root are smooth and not jagged, splintered or fractured. Use of machinery that grabs and pulls roots is prohibited. 2. Mulch: A wood chip mulch six (6) inches thick shall be placed by hand around tree root systems prior to beginning work within the drip line in accordance with the standards promulgated by the City arborist. 3. Protection Within Drip Line: Tree roots, branches and trunks shall be protected from damage using the appropriate techniques promulgated by the City arborist. 4. Trenching, Excavations and Directional Boring: Trenching, excavation and directional boring methods and standards shall be determined by the City arborist. Recommendations Once the land survey is completed showing significant tree locations and driplines, Facet can assist with identifying trees prioritized for retention and required tree protection areas. Tree driplines and additional survey features such as topography and delineated critical area boundaries can be utilized to identify trees that are Priority One trees as described above (see Table 4). The survey will also be important to determine which trees are located within critical areas or associated buffers and would therefore be regulated under RMC Section 4-3-050 Critical Area Regulations as well as any trees located in right-of-way areas that would be regulated as street trees. Additionally, based upon the field location of trees it is assumed that significant trees within the study area are located within the TREE INVENTORY REPORT FEBRUARY 2025 FACET NUMBER: 2204.0231.00 SOOS CREEK TRAIL PHASE 5a EXTENSION / 12 jurisdiction of the City of Renton, however a topographic survey will be required to confirm that this is the case. As the site plan is developed, trees indicated as Priority One trees on the enclosed Tree Inventory Table should be prioritized for retention. However, many trees that meet criteria for Priority One trees are not viable candidates for retention due to factors such as structural defects or poor health. Significant trees inventoried, aside from red alder and black cottonwood species, are Priority One trees due to adjacency to critical areas and associated buffers identified in the project area. As noted above, many of these trees may be located within critical areas or buffers and would therefore be regulated under RMC Section 4-3-050 Critical Area Regulations and would be required to be retained if feasible regardless of their condition. When the site plan for the Soos Creek Trail Phase 5a Extension is finalized, we can assist with assessing tree impacts and determining which trees require removal with the project. This will inform whether tree retention criteria are met with the project, or if replacement trees or other mitigation measures are required. Disclaimer The findings of this report are based on the best available science and are limited to the scope, budget, and site conditions at the time of the assessment. Although the information in this report is based on sound methodology, internal physical flaws (such as cracking or root rot) or other conditions that are not visible cannot be detected with this limited basic visual screening. Trees are inherently unpredictable. Even vigorous and healthy trees can fail due to high winds, heavy snow, ice storms, rain, age, or other causes. This report is based on the current observable conditions and may not represent future conditions of the trees. Changes in site conditions, including clearing and grading, will alter the condition of remaining trees in a way that is not predictable. TREE INVENTORY REPORT FEBRUARY 2025 FACET NUMBER: 2204.0231.00 SOOS CREEK TRAIL PHASE 5a EXTENSION / 13 References American National Standard (ANSI) A300 (Part 5). 2019. Tree, Shrub, and Other Woody Plant Management Standard Practices (Management of Trees and Shrubs During Site Planning, Site Development, and Construction). Londonderry, NH: Tree Care Industry Association. Council of Tree & Landscape Appraisers (CTLA). 2020. Guide for Plant Appraisal: 10th Edition, Revised. Atlanta, GA: International Society of Arboriculture. Dunster, J. 2017. Tree Risk Assessment Manual, Second Edition. Champaign, IL: International Society of Arboriculture. Matheny, Nelda, and James R Clark. Trees and Development: A Technical Guide to Preservation of Trees During Land Development. International Society of Arboriculture, 1998. Renton Municipal Code. Section 4-4-130 Tree Retention and Land Clearing Regulations. Chapter 13 Street Trees. | Renton Zoning Code (municipal.codes). Accessed 9 January 2025. TREE INVENTORY REPORT / SOOS CREEK TRAIL PHASE 5A EXTENSION / 2204.0231.00 Site Photos (January 2025 ) Photo 1. Typical conditions in the southern portion of the study area. Photo 2. Typical conditions in the central portion of the study area. ARBORIST REPORT / SOOS CREEK TRAIL PHASE 5A EXTENSION / 2204.0231.00 Photo 3. Typical conditions in the central portion of the study area. Photos 4 and 5. Many trees inventoried are in poor or very poor condition. TREE INVENTORY REPORT / SOOS CREEK TRAIL PHASE 5A EXTENSION / 2204.0231.00 Tree Inventory Table Soos Creek Trail Extension Parcels: 030550-0310, 133273-0840, 332305-9057, - 9073, -9010, and 619960-0180 Renton, WA / King County Tree Inventory Table Table Issued: 2/7/2025 Site Visit: 1/10/2025 and 1/15/2025 T A G # TREE NAME # S T E M S CO M B I N E D DB H ( I N ) H E I G H T ( F T ) R A D I U S ( F T ) C O N D I T I O N SI G N I F I C A N T L A N D M A R K RE T E N T I O N PR I O R I T Y 6501 Salix scouleriana (Scouler's willow)5 10.5 25 10 Fair Yes No One6502Acer palmatum (Japanese maple)2 23.5 30 15 Good Yes No One6503Acer palmatum (Japanese maple)2 13.4 35 15 Fair Yes No One6504Populus balsamifera (Cottonwood)1 15.1 60 12 Good Yes No Three6505Populus balsamifera (Cottonwood)3 20.2 55 10 Good Yes No Three6506Populus balsamifera (Cottonwood)1 10.4 50 10 Good Yes No Three6507Populus balsamifera (Cottonwood)1 8.7 50 10 Good Yes No Three6508Populus balsamifera (Cottonwood)1 10.0 50 10 Good Yes No Three6509Populus balsamifera (Cottonwood)3 14.6 50 15 Good Yes No Three6510Salix scouleriana (Scouler's willow)30 16.1*30 12 Fair Yes No One6511Alnus rubra (Red alder)1 9.8 45 10 Good Yes No Three6512Alnus rubra (Red alder)1 14.5 50 12 Good Yes No Three6513Alnus rubra (Red alder)1 20.4 50 16 Fair Yes No Three6514Alnus rubra (Red alder)1 13.4 50 12 Good Yes No Three6515Alnus rubra (Red alder)1 26.0 45 15 Poor Yes No Three6516Populus balsamifera (Cottonwood)6 37.9 60 18 Good Yes Yes Three6517Salix scouleriana (Scouler's willow)1 15.2 30 10 Good Yes No One6518Salix scouleriana (Scouler's willow)1 6.7 25 8 Good Yes No One6519Salix scouleriana (Scouler's willow)1 7.1 40 8 Good Yes No One6520Salix scouleriana (Scouler's willow)3 13.9 45 8 Good Yes No One6521Alnus rubra (Red alder)1 17.3 45 14 Poor Yes No Three6522Acer macrophyllum (Bigleaf maple)1 25.1 55 16 Fair Yes No One6523Salix scouleriana (Scouler's willow)1 7.0 25 6 Fair Yes No One6524Salix scouleriana (Scouler's willow)1 10.3 30 6 Fair Yes No One6525Salix scouleriana (Scouler's willow)1 6.0 30 6 Fair Yes No One6526Salix scouleriana (Scouler's willow)4 9.6 30 8 Fair Yes No One6608Acer circinatum (Vine maple)2 6.0 30 8 Good Yes No One6528Alnus rubra (Red alder)1 21.6 40 16 Good Yes No Three6528Alnus rubra (Red alder)1 24.4 40 18 Poor Yes No Three6529Acer macrophyllum (Bigleaf maple)1 45.3 50 18 Poor Yes Yes One6530Salix scouleriana (Scouler's willow)6 25.8 40 12 Fair Yes Yes One6531Populus balsamifera (Cottonwood)1 8.1 40 10 Good Yes No Three6532Populus balsamifera (Cottonwood)1 39.6 70 16 Fair Yes Yes Three6533Populus balsamifera (Cottonwood)1 28.2 65 12 Fair Yes No Three6534Salix scouleriana (Scouler's willow)8 11.3*20 8 Fair Yes No One6535Salix scouleriana (Scouler's willow)6 12.2*20 8 Fair Yes No One6536Rhamnus purshiana (cascara)1 7.1 20 6 Poor Yes No One6537Acer macrophyllum (Bigleaf maple)1 11.6 70 14 Good Yes No One6538Tsuga heterophylla (Western hemlock)1 20.2 50 16 Poor Yes No One6540Salix scouleriana (Scouler's willow)13 24.8*30 10 Good Yes Yes One6541Alnus rubra (Red alder)1 8.4 40 8 Very Poor Yes No Three6542Alnus rubra (Red alder)2 8.5 40 6 Poor Yes No Three6543Alnus rubra (Red alder)1 8.7 40 10 Good Yes No Three6546Prunus emarginata (Bitter cherry)1 7.9 25 8 Very Poor Yes No One6544Prunus emarginata (Bitter cherry)1 8.6 35 8 Poor Yes No One6545Prunus emarginata (Bitter cherry)1 7.3 25 8 Poor Yes No One6547Prunus emarginata (Bitter cherry)1 7.2 20 8 Poor Yes No One6548Prunus emarginata (Bitter cherry)1 8.3 20 6 Poor Yes No One6549Salix scouleriana (Scouler's willow)2 6.6 30 8 Poor Yes No One6550Salix scouleriana (Scouler's willow)2 6.5 30 8 Good Yes No One6551Salix scouleriana (Scouler's willow)3 7.6 30 8 Good Yes No One PAGE 1 OF 3 SEATTLE | KIRKLAND | MOUNT VERNON | WHIDBEY ISLAND | FEDERAL WAY | SPOKANE facetnw.com Soos Creek Trail Extension Parcels: 030550-0310, 133273-0840, 332305-9057, - 9073, -9010, and 619960-0180 Renton, WA / King County Tree Inventory Table Table Issued: 2/7/2025 Site Visit: 1/10/2025 and 1/15/2025 T A G # TREE NAME # S T E M S CO M B I N E D DB H ( I N ) H E I G H T ( F T ) R A D I U S ( F T ) C O N D I T I O N SI G N I F I C A N T L A N D M A R K RE T E N T I O N PR I O R I T Y 6553 Pseudotsuga menziesii (Douglas-fir)1 7.6 35 12 Good Yes No One6552Alnus rubra (Red alder)1 11.4 35 12 Good Yes No Three6554Salix scouleriana (Scouler's willow)4 11.9 35 12 Good Yes No One6555Alnus rubra (Red alder)2 11.8 40 12 Good Yes No Three6556Alnus rubra (Red alder)1 10.1 40 12 Good Yes No Three6557Pseudotsuga menziesii (Douglas-fir)1 9.6 35 12 Good Yes No One6558Populus balsamifera (Cottonwood)1 11.0 45 14 Good Yes No Three6559Populus balsamifera (Cottonwood)4 10.8 40 8 Good Yes No Three6560Populus balsamifera (Cottonwood)4 7.2 40 8 Good Yes No Three6561Populus balsamifera (Cottonwood)5 7.9 25 8 Good Yes No Three6562Alnus rubra (Red alder)4 9.4 25 8 Good Yes No Three6563Alnus rubra (Red alder)1 9.1 35 10 Fair Yes No Three6564Alnus rubra (Red alder)1 9.5 45 10 Good Yes No Three6565Alnus rubra (Red alder)1 10.6 45 12 Good Yes No Three6566Alnus rubra (Red alder)1 10.5 45 12 Good Yes No Three6567Alnus rubra (Red alder)1 8.6 40 8 Good Yes No Three6568Alnus rubra (Red alder)1 8.5 40 10 Good Yes No Three6569Alnus rubra (Red alder)2 9.6 40 10 Good Yes No Three6570Alnus rubra (Red alder)3 10.0 40 14 Good Yes No Three6571Alnus rubra (Red alder)4 10.9 45 14 Good Yes No Three6572Prunus emarginata (Bitter cherry)2 8.1 45 14 Fair Yes No One6573Alnus rubra (Red alder)4 9.5 45 10 Fair Yes No Three6574Alnus rubra (Red alder)1 8.2 45 10 Good Yes No Three6575Alnus rubra (Red alder)2 12.1 50 14 Good Yes No Three6576Alnus rubra (Red alder)1 8.2 25 6 Poor Yes No Three6577Alnus rubra (Red alder)1 8.2 45 10 Good Yes No Three6578Alnus rubra (Red alder)3 10.1 40 10 Good Yes No Three6579Alnus rubra (Red alder)1 8.0 50 10 Good Yes No Three6580Alnus rubra (Red alder)1 10.8 45 12 Good Yes No Three6581Alnus rubra (Red alder)1 10.7 45 12 Very Poor Yes No Three6582Alnus rubra (Red alder)1 9.6 45 12 Poor Yes No Three6583Pseudotsuga menziesii (Douglas-fir)1 7.7 40 10 Good Yes No One6584Pseudotsuga menziesii (Douglas-fir)2 8.9 40 10 Good Yes No One6585Alnus rubra (Red alder)1 8.7 50 14 Good Yes No Three6586Alnus rubra (Red alder)1 8.9 25 6 Very Poor Yes No Three6587Alnus rubra (Red alder)1 10.7 50 14 Good Yes No Three6588Alnus rubra (Red alder)1 13.8 50 16 Good Yes No Three6589Alnus rubra (Red alder)1 11.4 50 12 Good Yes No Three6590Populus balsamifera (Cottonwood)1 6.1 50 12 Good Yes No Three6591Alnus rubra (Red alder)1 12.2 55 14 Good Yes No Three6592Alnus rubra (Red alder)1 10.3 50 12 Fair Yes No Three6593Alnus rubra (Red alder)1 9.8 50 12 Fair Yes No Three6594Alnus rubra (Red alder)1 8.5 50 12 Fair Yes No Three6595Alnus rubra (Red alder)1 12.4 50 12 Fair Yes No Three6596Pseudotsuga menziesii (Douglas-fir)1 12.4 50 14 Good Yes No One6597Thuja plicata (Western red cedar)2 11.8 30 8 Good Yes No One6598Prunus emarginata (Bitter cherry)1 9.4 45 10 Good Yes No One6599Prunus emarginata (Bitter cherry)1 8.6 40 10 Fair Yes No One6600Prunus emarginata (Bitter cherry)2 9.2 40 10 Fair Yes No One6601Prunus emarginata (Bitter cherry)1 6.6 40 10 Poor Yes No One6602Prunus emarginata (Bitter cherry)1 7.9 40 10 Good Yes No One PAGE 2 OF 3 SEATTLE | KIRKLAND | MOUNT VERNON | WHIDBEY ISLAND | FEDERAL WAY | SPOKANE facetnw.com Soos Creek Trail Extension Parcels: 030550-0310, 133273-0840, 332305-9057, - 9073, -9010, and 619960-0180 Renton, WA / King County Tree Inventory Table Table Issued: 2/7/2025 Site Visit: 1/10/2025 and 1/15/2025 T A G # TREE NAME # S T E M S CO M B I N E D DB H ( I N ) H E I G H T ( F T ) R A D I U S ( F T ) C O N D I T I O N SI G N I F I C A N T L A N D M A R K RE T E N T I O N PR I O R I T Y 6603 Rhamnus purshiana (cascara)1 6.6 25 10 Good Yes No One6604Rhamnus purshiana (cascara)1 7.2 35 10 Good Yes No One6605Salix scouleriana (Scouler's willow)1 6.2 20 4 Very Poor Yes No One6606Salix scouleriana (Scouler's willow)24 9.8*30 8 Good Yes No One6607Salix scouleriana (Scouler's willow)23 9.6*30 8 Good Yes No One6608Acer circinatum (Vine maple)2 6.2 30 8 Good Yes No One6609Acer circinatum (Vine maple)24 12.2*25 8 Good Yes No One6610Acer circinatum (Vine maple)11 6.6*30 8 Good Yes No One6611Acer circinatum (Vine maple)12 10.4*30 10 Fair Yes No One6612Salix scouleriana (Scouler's willow)17 6.2*25 6 Good Yes No One6613Salix scouleriana (Scouler's willow)10 9.0*25 6 Good Yes No One6614Salix scouleriana (Scouler's willow)13 7.2*25 6 Good Yes No One6615Salix scouleriana (Scouler's willow)14 7.5*25 6 Good Yes No One6616Prunus emarginata (Bitter cherry)12 8.3*25 6 Good Yes No One6617Crataegus douglasii (Black hawthorn)22 10.3*25 8 Good Yes No One6618Acer circinatum (Vine maple)29 10.8*25 8 Fair Yes No One6619Acer circinatum (Vine maple)7 6.6*25 8 Fair Yes No One6620Acer circinatum (Vine maple)10 6.3*25 6 Good Yes No One6621Acer circinatum (Vine maple)27 10.4*20 8 Fair Yes No One6622Acer circinatum (Vine maple)8 8.5*20 8 Good Yes No One6623Acer rubrum (Red maple)1 9.5 35 6 Good Yes No One6624Acer rubrum (Red maple)1 10.7 35 8 Good Yes No One1**Acer rubrum (Red maple)1 12.6 45 8 Good Yes No One2**Prunus emarginata (Bitter cherry)1 10.0 40 6 Good Yes No One3**Acer macrophyllum (Bigleaf maple)1 12.0*45 18 Good Yes No One4**Pseudotsuga menziesii (Douglas-fir)1 36.0*80 24 Good Yes Yes One5**Alnus rubra (Red alder)2 14.0*45 10 Poor Yes No Three6**Acer macrophyllum (Bigleaf maple)1 14.0*50 18 Good Yes No One7**Acer macrophyllum (Bigleaf maple)1 8.0*50 14 Good Yes No One8**Acer macrophyllum (Bigleaf maple)1 6.0*45 12 Good Yes No One9**Pseudotsuga menziesii (Douglas-fir)1 30.0*85 16 Good Yes Yes One10**Acer macrophyllum (Bigleaf maple)1 7.0*35 8 Good Yes No One11**Pseudotsuga menziesii (Douglas-fir)1 28.0*90 18 Good Yes Yes One12**Acer macrophyllum (Bigleaf maple)1 8.0*35 10 Good Yes No One13**Carpinus caroliniana (American hornbeam)1 1.0*10 1 Good No No n/a14**Carpinus caroliniana (American hornbeam)1 4.0*25 3 Poor No No n/a15**Carpinus caroliniana (American hornbeam)1 4.0*25 3 Poor No No n/a16**Carpinus caroliniana (American hornbeam)1 4.0*25 3 Fair No No n/a17**Carpinus caroliniana (American hornbeam)1 5.0 25 5 Fair No No n/a18**Carpinus caroliniana (American hornbeam)1 1.0 8 1 Good No No n/a19**Carpinus caroliniana (American hornbeam)1 5.0*25 5 Good No No n/a20**Carpinus caroliniana (American hornbeam)1 5.0*25 5 Fair No No n/a21**Carpinus caroliniana (American hornbeam)1 4.0*20 4 Fair No No n/a22**Tilia americana (American basswood)1 4.0*15 6 Good No No n/a23**Tilia americana (American basswood)1 4.0*15 6 Good No No n/a24**Tilia americana (American basswood)1 4.0*15 6 Fair No No n/a25**Tilia americana (American basswood)1 4.0*15 6 Good No No n/a26**Tilia americana (American basswood)1 4.0*15 6 Good No No n/a27**Pyrus calleryana (Callery pear)1 2.0*12 3 Good No No n/a28**Pyrus calleryana (Callery pear)1 2.0*12 3 Good No No n/a * Estimated DBH.** Offsite trees and street trees were assessed from the public right-of-way and not tagged. No private properties were entered without premission. PAGE 3 OF 3 SEATTLE | KIRKLAND | MOUNT VERNON | WHIDBEY ISLAND | FEDERAL WAY | SPOKANE facetnw.com TREE INVENTORY REPORT / SOOS CREEK TRAIL PHASE 5A EXTENSION / 2204.0231.00 Tree Inventory Map