Loading...
REVIEWED BLD2022-0287+Arborist Report+4.29.2022_2.04.46_PM+2837361Shoffner Consulting 1015 10TH ST. MUKILTEO, WA 98275MOBILE: (206)755-9407 EMAIL: TONY@TONYSHOFFNER.COM BLD2022-0287 April 19, 2022 ,- - - - - - - - - - - - - - I Todd Echelbarger Reviewed by Echelbarger Homes and Land City of Edmonds Planning Division 4001 198th St. SW. #2 Lynnwood, WA 98036 Re: Tree Inventory - 92nd Ave. Edmonds, WA. Ir.T['5 RECEIVED May 03 2022 CITY OF EDMONDS DEVELOPMENT SERVICES DEPARTMENT This report is provided to address the recent tree inventory I conducted on the property at the address of 21322 92nd Ave. W in Edmonds, WA. I visited the site recently to gather information on the trees. The report provides my findings. Information on the trees is provided in the body of this report. Please see the accompany survey for reference to this report. 1.0 Site Conditions The property is located in a single family residence neighborhood in Edmonds, WA. It borders properties developed with single family residences in all directions. The property is currently undeveloped but cleared. 2.0 Tree Condition Assessment and Inventory Results I conducted a visual level 2 basic assessments of the trees according to ISA standards and based upon many years conducting such evaluations on trees in the Pacific Northwest, oberserving them up close to inspect the condition of the trunks and from afar to inspect conditions in the crowns. The assessment was conducted according to the methods specified in the ISA Tree Risk Assessment Manual and on nearly 20 years experience conducting such evaluations. The investigation involved the gathering of the following information: • Tree species • Trunk diameter • Crown spread diameter • Location factors • Health and condition notes (general level of vigor, defects, disease or pest problems) • Impacts There are 2 trees on the site, all are located along the western property line. There is a large, double-trunked western red cedar (Thuja plicata) in the right-of-way frontage. Following is information on the trees. The LOD distances are radial feet from the trunk # species 1 Western red cedar (Thuja plicata) 2 Flowering cherry (Prunus serrulata) 3 Willow (Salix babylonica) Dbh CSD Condition Notes 103" 44' Double trunks. Generally good condition and health. Located withiin the right-of-way. Specified LOD is 24' for above ground features to protect the crown and for below ground impacts the LOD is 15' to protect the root plate. 10" 22' Good condition and health. Young and vigorous. To be retained. Specified LOD is 12' to protect the crown and roots. 10" 16' Good condition and health. Young and vigorous. To be retained. Specified LOD is 10' to protect the crown and roots. 3.0 Limits of Distubance Discussion This section provides methods of the specification of the limits of disturbance (LOD) and special instructions for work within the LOD. The LODs for all trees are set outside the driplines for above ground features to provide protection for the crowns. For tree #1, because the drip line is so broad, there is a second LOD for below ground features set a location to protect the root plate. Any work within the LOD is to be done by hand. Any roots damaged within the LOD as large as 1/2" are to be hand cut. No crown reduction pruning. Any pruning to raise the crown is to be done by hand. 4.0 Proposed Development and Tree Retention and Replacement The proposed development is to divide the lot in two and build a single family residence on the new lot. The City of Edmonds tree retention, protect and replacement requirements are specified in chapter 23.10 Tree Related Regulations. Both trees (100%) on the lot are being retained, satisfying the required retention. Three trees are required to be in the lot, therefore, and additional tree is required to be planted. I recommend a 6' tall incense cedar (Calocedrus decurrens). Prior to development activity or initiating tree removal on the site, vegetated areas, individual trees and soil to be preserved in accordance with ECDC 23.10.060(B) shall be protected from potentially damaging activities pursuant to the following standards: A. Preconstruction Meeting Required. Prior to the commencement of any permitted clearing and grading activity, a preconstruction meeting shall be held on site with the permittee and appropriate city staff. The project site shall be marked in the field as follows: 1. The extent of clearing and grading to occur; 2. Delineation and protection of any critical areas and critical area buffers with clearing limit fencing; 3. Flagging of trees to be removed and tags on trees to be retained; and 4. Property lines. B. Placing Materials Near Trees. No person may conduct any activity within the protected area of any tree designated to remain, including, but not limited to, operating or parking equipment, placing solvents, storing building material or stockpiling any materials, or dumping concrete washout or other chemicals. During construction, no person shall attach any object to any tree designated for protection. C. Protective Barrier. Before development, land clearing, grading, filling or any land alteration, the applicant shall: 1. Erect and maintain readily visible temporary protective tree fencing along the limits of disturbance which completely surrounds the protected area of all retained trees, groups of trees, vegetation and native soil. Tree protective fencing shall be a minimum height of three feet, visible and of durable construction; orange polyethylene laminar fencing is acceptable. 2. Install highly visible signs spaced no further than 15 feet apart along the entirety of the protective tree fencing. Said sign must be approved by the director and shall state, at a minimum, "Tree and Soil Protection Area, Entrance Prohibited," and provide the city phone number for code enforcement to report violations. 3. Prohibit excavation or compaction of soil or other potentially damaging activities within the barriers; provided, that the director may allow such activities approved by a qualified professional and under the supervision of a qualified professional retained and paid for by the applicant. 4. Maintain the protective barriers in place for the duration of the project until the director authorizes their removal. 5. Ensure that any approved landscaping done in the protected zone subsequent to the removal of the barriers shall be accomplished with machinery from outside the protected zone or by hand. 6. Limit the time period that the critical root zone is covered by mulch, plywood, steel plates or similar materials, or by light soils, to protect the tree's critical root zone. 7. In addition to the above, the director may require the following: a. If equipment is authorized to operate within the protected zone, the soil and critical root zone of a tree must be covered with mulch to a depth of at least six inches or with plywood, steel plates or similar material in order to protect roots and soil from damage caused by heavy equipment. b. Minimize root damage by hand -excavating a two -foot -deep trench, at edge of critical root zone, to cleanly sever the roots of trees to be retained. Never rip or shred roots with heavy equipment. c. Corrective pruning performed on protected trees in order to avoid damage from machinery or building activity. d. Maintenance of trees throughout construction period by watering and fertilizing. D. Grade. 1. The grade shall not be elevated or reduced within the critical root zone of trees to be preserved without the director's authorization based on recommendations from a qualified professional. The director may allow coverage of up to one-half of the area of the tree's critical root zone with light soils (no clay) to the minimum depth necessary to carry out grading or landscaping plans, if it will not imperil the survival of the tree. Aeration devices may be required to ensure the tree's survival. 2. If the grade adjacent to a preserved tree is raised such that it could slough or erode into the tree's critical root zone, it shall be permanently stabilized to prevent soil erosion and suffocation of the roots. 3. The applicant shall not install an impervious surface within the critical root zone of any tree to be retained without the authorization of the director. The director may require specific construction methods and/or use of aeration devices to ensure the tree's survival and to minimize the potential for root -induced damage to the impervious surface. 4. To the greatest extent practical, utility trenches shall be located outside of the critical root zone of trees to be retained. The director may require that utilities be tunneled under the roots of trees to be retained if the director determines that trenching would significantly reduce the chances of the tree's survival. 5. Trees and other vegetation to be retained shall be protected from erosion and sedimentation. Clearing operations shall be conducted so as to expose the smallest practical area of soil to erosion for the least possible time. To control erosion, it is encouraged that shrubs, ground cover and stumps be maintained on the individual lots, where feasible. 5.0 Use of This Report This report is provided to report on the inventory of the trees on the subject project site and the requirements of the City of Edmonds for tree replacement on development properties. Trees are dynamic and their conditions are constantly changing particularly when their surrounding environment is altered. Shoffner Consulting and this report cannot guarantee that retained trees will not fail due to weather events or construction - related damage. Given that site changes can affect tree health and stability, this report, Shoffner Consulting and Tony Shoffner cannot be held liable for damage resulting from tree failure. Please call if you have any additional questions. Cordially, Tony Shoffner ISA Certified Arborist #PN-0909A TRAQ