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Kurt Fickeisen 13024 37th Ave. NE Seattle, WA 98125 (206) 841-3158 [EMAIL REDACTED] Hans Fagerlund GGLO Design 1301 1st Avenue, Suite 301 Seattle, WA 98101 April 9, 2018 Dear Mr. Fagerlund, Plans call for developing 15801 and 15945 NE 85th Street in Redmond Washington (KC Parcels [PHONE REDACTED], [PHONE REDACTED]). The parcels contain office buildings along with parking spaces and mature trees. Since mature trees are present, collection of information was required prior to development. In addition an evaluation of development impact on trees was requested. On March 6th and 7th of 2018 Kurt Fickeisen from Symbiosis Tree Care visited these parcels and collected information on trees with diameters greater than 6-inches on or adjacent to parcels. This letter contains a report that provides information on tree species, size, and condition along with status within the City of Redmond. With this information and development plans, the report provides guidelines for tree preservation and required planting mitigation. Please see Assumptions and Limitations for this report (Assumptions and Limitations). Summary 30 Significant Trees were identified on 15801 and 15945 NE 85th Street Redmond Washington properties. No trees have diameters greater than 30-inches required to meet Landmark Tree designation. Most trees are located near property boarders; however a group primarily consisting of pines grows between the 15801 and 15945 properties. All inspected trees show signs of fair vigor; however structural ratings for trees range from fair to poor. Based on property design plans, 28 trees must be removed. To compensate for canopy loss, 64 trees must be planted. Alternatively other forms of landscape restoration may be permitted. New trees may be planted on existing parcels if sufficient space is available. If space for new onsite planting is not available, trees may be planted offsite or the City of Redmond may request other forms of landscape restoration. ---PAGE BREAK--- 2 Symbiosis Tree Care 4-9-2018 15801 and 15945 Property Trees Observations A review of 2015 King County aerial images and a site survey indicates trees are present near property boarders and in central portions of the property. Three significant trees are visible in aerial images but were not found onsite, neither was evidence of recent removal (Figure-1). Tree inventory starts on NE 85th Street adjacent to the 15801 property then moves counter clockwise and onto 15945 property. Trees are numbered based on order of inspection (Figure- Information on individual tree size, canopy spread and comments are provided as well (Figure-3A, Figurew-3B). Trees under 6-inch diameter are not numbered. 15801 Property Adjacent to NE 85th Street Three trees are sweetgums (Liquidambar styraciflua) (Photo-2). The canopies of all three overhang sidewalks and the existing building. Tree trunks are codominant. In addition a large root of Tree-2 girdles the trunk (Photo-2). 15801 Property Adjacent to 158th Avenue NE From north to south trees include three Raywood ash (Fraxinus oxycarpa) and one black cottonwood (Populus trichocarpa) near or on the southwest corner of the property (Photo-3). The ash trees are single trunk trees that become codominant. Structural roots of two trees (Tree-4, Tree-5) compete with a parking lot entrance and exit for space (Photo-4). The black cottonwood (Tree-7) consists of four codominant trunks that divide near grade level. In addition structural roots compete with adjacent infrastructure for growth space. Sidewalk buckling may be the result of root growth (Photo-5). 15801 Property Southern Property Line Trees in this group grow adjacent to the southern property border which features a 3-foot tall retaining wall. While arborvitaes grow on the southern 15867 property, the retaining wall restricts arborvitae root growth (Photo-6, Photo-7). Trees in this group and on the 15801 property consist of six red pines (Pinus resinosa) and one silver maple (Acer saccharinum). While small trees including photinia (Photinia x fraseri) are present near pine trees, trunk diameters are less than 6-inches. All trees in this group grow between the property liner and paved parking. Most but not all trunks are codominant. In addition the silver maple (#13) and red pine to the east (#14) grow in an enlarged area of grass near the eastern property line (15945 Property). The silver maple has a canopy spread wider than most trees inspected. ---PAGE BREAK--- 3 Symbiosis Tree Care 4-9-2018 15801 and 15945 Property Trees 15801 & 15945 Property Border Five of trees in this group are red pines, and one is a sweetgum. In addition a flowering cherry (Prunus Sp.) grows on the 15801 property and two Japanese maples (Acer palmatum) grow on the 15945 property (Photo-8 - Photo-10). The red pines grow on a short east facing slope. All contain codominant trunks either at grade level or higher in the canopy. In addition pines are in close proximity to paved parking. The flowering cherry canopy leans over parking on the 15801 property. A flowering cherry to the north has a diameter less than 6-inchs. The two Japanese maples are part of a grove including rhododendron shrubs. Maple trunks and canopies compete with paved parking on the 15945 property or hang low over the sidewalk on NE 85th Street. 15945 Property & West of Building Two pine trees are in this group. One is a shore pine (Pinus contorta), and the second is a Scotch pine (Pinus sylvestris) (Photo-11). A large diameter limb was removed low on the trunk of the shore pine. Pruning to the Scotch pine primarily consists of cuts to maintain building clearance. While there are Japanese maples north of the pine, these trees have diameters less than 6- inches. 15945 Property Eastern Property Line Five trees grow on or adjacent to the eastern property line. Three are flowering cherry trees (Photo-12). The remaining two consist of a sweetgum and a western hemlock near NE 85th Street (Photo-13). The flowering cherries grow in close proximity to paved parking and a building on the adjacent 15955 property. All have been sheared or topped to maintain low heights. In addition trunk decay and epicormic growth or stump sprouts were observed. The western hemlock trunk is in close proximity to parking on the 15955 property. In addition most structural roots travel westward and onto the 15945 property (Photo-14). The sweetgum has a codominant growth pattern and the upper canopy appears to have been reduced on one or several occasions when pruning took place. In addition a significant section of trunk bark is missing at 10-feet elevation on the southern trunk. ---PAGE BREAK--- 4 Symbiosis Tree Care 4-9-2018 15801 and 15945 Property Trees Discussion Current Canopy Cover 30 trees were inspected on the adjacent parcels. Tree diameters range between 6.5-inches and 28-inches. Based on these diameter ranges no trees qualify as Landmark Trees (City of Redmond Washington 2015). All thirty inspected trees show signs of fair vigor based on current or potential growth capability. While tree structure ratings of 23 trees range from Fair to Fair-Poor, seven trees show signs of poor structure due to observed defects • At this time no inspected trees represent high risk given current property use Since trees on the property do not represent a high risk, there are 30 significant trees on the property (City of Redmond Washington 2015). Based on City of Redmond Tree Protection Standards, 35-percent of significant trees shall be retained. In this case retention of 11 trees is required to meet the 35-percent threshold. While 19 trees may be removed, replanting on a 1:1 Scale is required. If properties design plans require removal of 20 trees or more, additional trees must be replanted at a higher scale rate (3:1 Scale). Canopy Cover after Site Development Site development plans calls for replacing existing structures on parcels with a property known as, “Modera River Trail.” Based on GGLO Designs inform (Figure-4) • 28 existing trees will be removed and two trees will be retained Figure-4 provides a tree replacement calculation below the site plan. The calculation correctly states that 64 new trees must be planted based on construction design plans. Conclusion Based on design plans two existing trees (#29, #30) will be retained and 64 new trees must be planted to compensate for canopy loss resulting from tree removal. Newly planted trees will require sufficient room for planting. In addition space should be allowed for future growth both above and below grade. ---PAGE BREAK--- 5 Symbiosis Tree Care 4-9-2018 15801 and 15945 Property Trees Recommendations Tree Protection The two trees recommended for protection require placement of fencing 5-feet beyond their radial canopy spreads listed in Figure-3B (Figure-3B). Tree 29 grows adjacent to the eastern property line. Protection fencing should be located in the following distances from the trunk • East: 19-feet or at the edge of pavement not subject to development • North: 16-feet or at the sidewalk edge • South: 21-feet or at the edge of pavement not subject to development Tree-30 is a street tree adjacent to NE 85th Street. Protection fencing should be located at the sidewalk boarder south of the trunk and at the curb edge north of the tree. In addition protection fencing should be located • East: 21-feet, or the edge of the driveway entrance off NE 85th Street • West: 21-feet, or the driveway entrance off NE 85th Street Tree Replacement 64 trees must be planted to compensate for canopy loss (City of Redmond Washington 2015). Replacement trees are to be a minimum of • Two-and-one-half-inch caliper at breast height for deciduous trees. • Six feet in height for evergreen trees • The Administrator may consider smaller-sized replacement trees if the applicant can demonstrate that smaller trees are more suited to the species, the site conditions, and the purposes of this section, and that such trees will be planted in sufficient quantities to meet the intent of this section • Replacement trees shall be primarily native species in order to restore and enhance the site as nearly as practicable to its pre-development character • The condition of replacement trees shall meet or exceed current American Nursery and Landscape Association or equivalent organization’s standards for nursery stock • Installation of required replacement trees shall be in accordance with best management practices for landscaping which ensure the tree’s long-term health and survival • All required tree replacement and other required mitigation shall be bonded or completed prior to issuance of a building permit ---PAGE BREAK--- 6 Symbiosis Tree Care 4-9-2018 15801 and 15945 Property Trees If on-site replacement cannot be achieved, the City of Redmond may consider the following alternatives: 1. Off-Site Tree Replacement. a. The number of replacement trees shall be the same as described in subsection RZC 21.72.080.B of this section, Replacement Required. Replacement costs (material plus labor) shall be at the applicant’s expense. b. Allowable sites for receiving off-site replacement plantings. i. City- or county-owned parks, open space areas, Native Growth Protection Areas (NGPA), or river and stream corridors within Redmond city limits, or lands controlled by the City. ii. Private open space which is permanently protected and maintained, such as a Native Growth Protection Area (NGPA). c. All trees to be replaced off-site shall meet the replacement standards of this section. 2. Tree Replacement Fee. A fee-in-lieu of tree replacement may be allowed, subject to approval by the Administrator after careful consideration of all other options. A tree replacement fee shall be required for each replacement tree required but not planted on the application site or an off-site location. a. The amount of the fee shall be the tree base fee times the number of trees necessary to satisfy the tree replacement requirements of this section. The tree base fee shall cover the cost of a tree, installation (labor and equipment), maintenance for two years, and fund administration. b. The fee shall be paid to the City prior to the issuance of a tree removal permit. c. Fees collected under this subsection shall be expended only for the planting of new trees in City- owned parks, open spaces, or rights-of-way. 3. Landscape Restoration. Where appropriate, the Administrator may consider other measures designed to mitigate the loss of trees by restoring all or parts of the forest landscape and its associated benefits. Measures may include, but are not limited to: a. Creation of wildlife snags from trees which would otherwise be removed; b. Replacement of certain ornamental trees with native shrubs and groundcover; c. Replacement of hazardous or short-lived trees with healthy new trees more likely to survive; d. Daylighting and restoration of stream corridors with native vegetation; and e. Protection of nonsignificant trees to provide for the successional stages of forest development. If you have questions about the contents of this report contact Symbiosis Tree Care. Sincerely Kurt Fickeisen International Society of Arboriculture™ (ISA) Certified Arborist # RM-451A ISA Tree Risk Assessment Qualified American Society of Consulting Arborists Registered Consulting Arborists© # 472 ---PAGE BREAK--- 7 Symbiosis Tree Care 4-9-2018 15801 and 15945 Property Trees Works Cited City of Redmond Washington. Redmond Zoning Code. October 17, 2015. http://online.encodeplus.com/regs/redmond-wa/doc- viewer.aspx?secid=1884&keywords=trees#secid-1997 (accessed March 12, 2018). Figure-1 King County iMAP 2015 Aerial Image • Trees Not Present were removed between aerial image capture and inspection on March 6 2018 ---PAGE BREAK--- 8 Symbiosis Tree Care 4-9-2018 15801 and 15945 Property Trees Figure-2 ---PAGE BREAK--- 9 Symbiosis Tree Care 4-9-2018 15801 and 15945 Property Trees Figure-3A ---PAGE BREAK--- 10 Symbiosis Tree Care 4-9-2018 15801 and 15945 Property Trees Figure-3B ---PAGE BREAK--- 11 Symbiosis Tree Care 4-9-2018 15801 and 15945 Property Trees Figure-4 ---PAGE BREAK--- 12 Symbiosis Tree Care 4-9-2018 15801 and 15945 Property Trees Photo-1 Photo-2 Photo-3 Photo-4 Photo-5 ---PAGE BREAK--- 13 Symbiosis Tree Care 4-9-2018 15801 and 15945 Property Trees Photo-6 Photo-7 Photo-8 Photo-9 ---PAGE BREAK--- 14 Symbiosis Tree Care 4-9-2018 15801 and 15945 Property Trees Photo-10 Photo-11 Photo-12 Photo-13 Photo-14 ---PAGE BREAK--- 15 Symbiosis Tree Care 4-9-2018 15801 and 15945 Property Trees Assumptions and Limitations