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Home My WebLink AboutA_Arborist_Report_231220ARBORIST REPORT 4114 NORTHEAST 6 PLACE, RENTON, WASHINGTON 98059 In Association With Alan Haywood Certiﬁed Arborist/ TRAQ DECEMBER 16, 2023 Prepared by Terrence J. Flatley Forester/Certiﬁed Arborist UNION 670 CONDOMINIUMS HOA Union 670 Condominium Homeowners Association 4114 NE 6 Place, Renton, Washington 98059 Introduction The Union 670 Condominium Homeowners Association (HOA) reference address is 4114 Northeast 6 Place, Renton, WA 98059. The development contains three buildings with 2 units per building and an undeveloped wooded area along Northeast 6 Place. County records indicate this is parcel number 8809600000 and comprises 31,112 square feet of land. The parcel is further identified as being located in the Southwest Quarter of Section 10, Township 23 North, Range 5 East of King County but within Renton city limits. While other trees exist on the developed portion of the property, this report focused on the wooded area at the east end of the parcel. Two trees failed in this area during the week of December 4, 2023 causing extensive damage to one of the buildings and other property damage. The residents that live there were home but uninjured and are now fearful being in the building because of other trees nearby they are concerned about. Data Collection Methods All trees in wooded areas were visually inspected by viewing surface roots, the root collar, trunk flare, trunk and branches. Trees were tapped or sounded with a mallet to ascertain defects such as hollows or decay not visible from outside the trees. Targets were located and included fences, yards, buildings, driveways, utilities, vehicles, sidewalks, streets and other areas where damage to property or people might occur if a tree failed in whole or in part. One cottonwood tree has buckled the asphalt roadway. Equipment used to inspect trees included a steel D-tape for measuring tree diameters at 54 inches from the ground, commonly referred to as DBH (diameter at breast height). A mallet for tapping tree trunks up to 8 feet as well as visible roots in order to sound for hollows or wood decay and rot interior of the bark. Binoculars were used for observing the upper crowns and a camera. Following recording of tree data, each suspect tree was numbered using yellow forestry tape and black marker. ARBORIST REPORT Alan Haywood, an International Society of Arboriculture Certified Arborist with a Tree Risk Assessment Qualification (TRAQ) completed seven TRAQ forms for trees to consider for removal. Tree Location Maps Page of 2 9 Union 670 Condominium HOA Figure 1. Neighborhood Area Map with Parcel Highlighted in Yellow Figure 2. Tree Location Map ARBORIST REPORT Tree Inventory Table 1 contains the entire tree inventory on the east end of the parcel. There are at least 7 other trees within the footprint of each building but not represented in the table. The tree numbers in the table correspond with their locations in Figure 2. Trees shown with red background in the table are those of greatest concern to the HOA. Table 1. Tree Inventory Tree No.Species DBH (Inches)Height (Feet)Condition (%)Risk Rating 1 Cottonwood 32 128 100 Low 2 Cottonwood 29 125 80 Low 3 Cottonwood 23 131 90 Low 4 Oregon ash 8 32 100 Low 5 Cottonwood 13 95 60 Low 6 Cottonwood 7 60 0 Moderate 7 Cottonwood 20 130 90 Low 8 Oregon ash 9 45 60 Low 9 Oregon ash 4 12 30 Low 10 Cottonwood 12 56 40 Low 11 Red alder 6 25 60 Low 12 Bigleaf maple 10 25 50 Low 13 Oregon ash 8 32 50 Low Trunk 14 Cottonwood 19 128 30 Moderate Trunk 15 Cottonwood 24 128 60 Moderate Trunk 16 Cottonwood 16 90 0 High 17 Bigleaf maple 10 32 70 Low Trunk 18 Cottonwood 23 128 50 High Trunk 19 Cottonwood 22 120 20 Moderate Trunk 20 Cottonwood 20 125 0 High Tree No. Page of 3 9 Union 670 Condominium HOA ARBORIST REPORT For clarification on trees 14, 15 16, and trees 18,19 and 20, though they are listed as separate trees they can also be interpreted as one tree with three stems therefore, instead of six trees they can also be considered as only two trees by some. For the purposes of this report, consider each stem a separate tree trunk. Tree Risk Assessment - TRAQ Forms Alan Haywood provided the completed TRAQ forms usually requested by the City of Renton prior to permitting. The forms can be found at the end of this report. Timeframe This report is valid for a twelve month period under normal weather conditions. More frequent inspections might be warranted following severe weather conditions. Tree Photographs Photographs were taken of the trees highlighted red from Table 1. They are shown below. 21 Cottonwood 27 128 80 22 Austrian pine 13 50 100 Low 23 Austrian pine 12 40 60 Low 24 Giant sequoia 17 40 70 Low 25 Giant sequoia 33 144 100 Low 26 Redwood 31 130 80 Low 27 Redwood 30 130 80 Low Species DBH (Inches)Height (Feet)Condition (%)Risk RatingTree No. There are an additional 7 trees, 6 inches or greater in dbh at 3 units. Page of 4 9 Union 670 Condominium HOA Moderate ARBORIST REPORT Page of 5 9 Union 670 Condominium HOA Figure 3. Two recent trunk failures to black cottonwood trees. ARBORIST REPORT I Page of 6 9 Union 670 Condominium HOA Figure 4. Trees of greatest concern ARBORIST REPORT Page of 7 9 Union 670 Condominium HOA Figure 5. Stump sprout origin ARBORIST REPORT Page of 8 9 Union 670 Condominium HOA Figure 6. Severe lean toward house ARBORIST REPORT Conclusions The main concern of the HOA are trees that are severely leaning towards HOA property and adjacent properties. Because all but Tree 6 are of sprout origin, the size of trees, their severe lean, top-heaviness, lopsided root systems, potential root decay associated with a decaying parent-stump and waterlogged soils 3 to 4 months out of the year, they are considered high risk trees. An alternative to complete tree removal would be reducing the heights of trees to a height less than the distance to property. Creating wildlife trees in this manner may reduce tree removal costs in some instances and provides additional wildlife habitat. Some of the information in this report can be duplicated when completing City of Renton permit applications. The information in this report is based upon ground level observations and considers tree conditions under normal weather conditions. Periodic inspections of the forested areas should be considered as site conditions change over time. For further information please contact Terry Flatley, 425-891-2625, tjflyfishing@me.com . Page of 9 9 Union 670 Condominium HOA