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Home My WebLink AboutEx08_Arborist_Report September 6, 2021 Anita Woo Development C/o email: Mark Pavoni, Knit Studios SUBJECT: PROPERTIES AT 1518 & 1526 JEFFERSON AVENUE NE & 1513 KIRKLAND AVENUE NE- RENTON, WA ARBORIST REPORT Dear Anita, I conducted a site visit at the above-referenced site on September 5 to evaluate the overall health of each tree per the City of Renton's Municipal Code Section 4-4-130. Following are the existing significant trees found on the site along with their species, dbh, drip line (radius), overall health. See also Landscape Plan Sheet L-1. 22 significant trees were identified and their general health evaluated. All existing significant trees are located on the site. The species list is below. According to City of Renton code, a significant tree 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 planted within the most recent ten (10) years shall qualify as significant trees, regardless of the actual caliper.” Each tree in this report was visited. Tree diameters were measured by the myself and are shown in the table below and on the tree retention plan. Each tree was visually examined for defects and vigor. The tree assessment procedure involves the examination of many factors: - The crown of the tree is examined for current vigor. This is comprised of inspecting the crown (foliage, buds and branches) for color, density, form, and Exhibit 8 RECEIVED Clark Close 10/27/2021 PLANNING DIVISION DocuSign Envelope ID: E4190986-0960-4AF4-9156-D3C7AC5C2491 annual shoot growth, limb dieback and disease. The percentage of live crown is estimated for coniferous species only and scored appropriately. - The bole or main stem of the tree is inspected for decay, which includes cavities, wounds, fruiting bodies of decay (conks or mushrooms), seams, insects, bleeding, callus development, broken or dead tops, structural defects and unnatural leans. Structural defects include crooks, forks with V-shaped crotches, multiple attachments, and excessive sweep. - The root collar and roots are inspected for the presence of decay, insects, and/or damage, as well as if they have been injured, undermined or exposed, or original grade has been altered. A ‘viable’ tree is “a significant tree that a qualified professional has determined to be in good health, with a low risk of failure due to structural defects, is wind firm if isolated or remains as part of a grove, and is a species suitable for its location.” Tree considered ‘non-viable’ are trees that are in poor condition due to disease, age-related decline, have significant decay issues and/or cumulative structural defects, which exacerbate failure potential. TREE RETENTION CALCULATION The project is comprised of three separate parcels. All parcels within the development are zoned R-14. 10% of existing onsite viable significant trees are required to be retained. No existing significant trees are proposed to be retained. SIGNIFICANT TREES ON SITE TREE # SPECIES DBH DRIP LINE HEALTH REMOVED / RETAIN 1 West Red Cedar 6" 10' dia. Good Remove 2 West Red Cedar 6" 10' dia. Ok Remove 3 West Red Cedar 6" 10' dia. Ok Remove 4 Fruit Cherry 6,6,8,10" 20’ dia. Ok Remove 5 Fruit Apple 6,8,8,8" 20' dia. Poor Remove 6 Leyland Cypress 8" 10' dia. Ok Remove 7 Crabapple 6,10" 20' dia. Ok Remove 8 Sugar Maple 34" 50’ dia. Poor Remove 9 Fruit Cherry 16" 15' dia. Poor Remove 10 Fruit Cherry 14" 10' dia. Ok Remove DocuSign Envelope ID: E4190986-0960-4AF4-9156-D3C7AC5C2491 11 Fruit Cherry 6,8,8,10" 25' dia. Poor Remove 12 West Red Cedar 40" 35’ dia. Ok Remove 13 West Red Cedar 6" 10' dia. Ok Remove 14 Mt. Ash 6" 10' dia. Ok Remove 15 West Red Cedar 24" 30' dia. Good Remove 16 Deciduous Tree 8" 8’ dia. Poor Remove 17 Hackberry 8,8" 20' dia. Good Remove 18 West Red Cedar 14/24" 30' dia. Good Remove 19 West Red Cedar 12" 20' dia. Good Remove 20 Douglas Fir 36" 40’ dia. Good Remove 21 West Red Cedar 24" 30' dia. Good Remove 22 Blue Spruce 24" 20’ dia. Poor Remove ADDITIONAL NOTES: No additional notes for ‘ok’ and ‘good’ condition trees. Tree #5: Fruit Apple. Historic fruit tree pruning left to grow out. Rotting observed at base. Tree #8: Sugar Maple. Significant historic pruning left to grow out. Previous topping and pruning left to grow out. Numerous water sprouts. Rotting in old prune cuts. Cuts and damage to surface roots. Visible surface roots as a result of erosion or soil compaction. All areas under tree canopy now utilized as parking; would lead to compacted feeder roots. Tree #9: Fruit Cherry. Significant canopy dieback as a result of no irrigation and Summer 2021 excessive heat. Over-pruned. Tree #11: Fruit Cherry. Thin canopy. Over-pruned. Tree #16: Deciduous tree. Over-pruned to the point of little spreading canopy that is all concentrated into one area off-center. Tree #22: Blue Spruce. Top 1/3 of tree dead. Thin canopy. Generally, a tree that does not do well in the Puget Sound area due to moderate Winter temperatures. Adjacent to tree #21 is a 18-20” caliper Cottonwood tree with a severe lean onto the subject property. Location of the tree is on the property to the east. I recommend that arrangements be made with that landowner to remove the leaning tree. This tree will create a hazard situation that may result in property damage or injury. DocuSign Envelope ID: E4190986-0960-4AF4-9156-D3C7AC5C2491 There is no warranty suggested for any of the trees subject to this report. Respectfully, Jeff Varley Landscape Architect Varley Varley Varley 19819 30th Drive SE Bothell, WA 98012 DocuSign Envelope ID: E4190986-0960-4AF4-9156-D3C7AC5C2491