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22-102123-UP-Tree Inventory Report-05-09-2022Tree Inventory Memorial Field 1300 S 308th Street Federal Way WA 98003 PO BOX 25413 Federal Way WA 98093 253.350.4722 info@treeresource.com Saturday, February 26, 2022 Table of Contents Assignment 3 Limits of Assignment 3 Purpose and Use of the Report 3 Observations 4 Tree Measurement 8 Visual Tree Assessment 8 Discussions 9 Condition and Structure Rating 9 Suitability for Preservation 9 Critical Root Zone 10 Conclusions and Recommendations 11 Appendix A - Marked Up Topo-Survey 12 Appendix B - Bibliography 19 Appendix C - Assumptions & Limiting Conditions 20 Appendix D - Certiﬁcation of Performance 21 February 26, 2022 Memorial Field Tree Inventory of 3 21 Assignment I was hired to provide an inventory of the trees at Memorial Field. The trees are to be categorized by their species, size, and location in accordance with City of Federal Way Zoning Standards. (FWRC Chapter 19.120 CLEARING, GRADING, AND TREE AND VEGETATION RETENTION) Each tree’s species, size, tree unit calculation, condition, suitability for retention, critical root zone, and location will be provided in this report. Limits of Assignment Unless stated otherwise, the information contained in this report covers only the trees I examined, and reﬂects the condition of these trees at the time of inspection. My inspection is limited to visual examination of the subject trees within the property boundaries as prescribed for a level 1 Tree Risk Assessment in the ISA Best Management Practices: Tree Risk Assessment Second Edition: International Society of Arboriculture: 2017. Purpose and Use of the Report This report will be used to identify which trees are best suited for retention and which trees should be replaced in compliance with development standards for the City of Federal Way. The purpose is to help determine during subsequent planning stages where best to place structures and perform development operations, while retaining sufﬁcient trees or replanting new trees to meet the governing codes and standards. Zeb Haney | Tree Resource | 253.350.4722 | info@treeresource.com Image 1 - (Imagery from Google Maps looking north) Memorial Field encompasses about 8.7 acres. The white, dashed circle represents the area where the trees I inventoried are located. February 26, 2022 Memorial Field Tree Inventory of 4 21 Observations Memorial Field is within a Community Business Zone (BC). It is part of the greater Federal Way High School property, the Memorial Field portion being approximately 380,000 square feet (8.7 acres). I tagged and measured ten trees as shown in the table below. Additionally, there are approximately 145 other young trees under six inches DBH. These small trees appear to be trees that were planted in and around two created pond/wetlands within the last three years. For the locations of the trees presently onsite please refer to the topo-survey in Appendix A. Zeb Haney | Tree Resource | 253.350.4722 | info@treeresource.com February 26, 2022 Memorial Field Tree Inventory of 5 21 Zeb Haney | Tree Resource | 253.350.4722 | info@treeresource.com Image 2 - (Imagery from Bing Maps Bird’s Eye view) This image is included to clarify the presence of a large number of newly planted trees around the two ponds to the west of Memorial Stadium. February 26, 2022 Memorial Field Tree Inventory of 6 21 Zeb Haney | Tree Resource | 253.350.4722 | info@treeresource.com Image 3 - Looking south. The larger tagged trees are along the west border of the property (right side of the photo). The smaller untagged trees are similar in size to the oak tree in the foreground. February 26, 2022 Memorial Field Tree Inventory of 7 21 Zeb Haney | Tree Resource | 253.350.4722 | info@treeresource.com Image 4 (left) and 5 (below) - The tree in this photo was tagged as representative of the newly planted trees on the site. This maple is #3006 and measures 3 inches DBH. Also seen in Image 5 are two young Douglas-ﬁr trees that will have a large canopy at maturity. February 26, 2022 Memorial Field Tree Inventory of 8 21 Tree Measurement I measure a tree at the smallest circumference at or below four and a half feet from grade. The girth of a tree is typically expressed in terms of the DBH (diameter at breast height). When measuring a tree with more than one trunk or stem, I follow the industry standard of measuring each stem, calculating for the cross sectional area, and adding these together for a total representative diameter. Municipalities differ in regard to standards for girth measurement. If my assignment is governed by a municipal code I use whatever criteria is determined by the governing authority. The Federal Way Revised Code calls for a measurement at four and one-half feet above the ground surface. Visual Tree Assessment I use a Visual Tree Assessment (VTA) method to evaluate tree health and structure. The VTA is an ordered analysis of a tree that observes current growing conditions and tree structure. I am able to compare a tree with other trees I have observed to note typical patterns and abnormalities that may be present. The observations are based on my knowledge of tree structure and conditions, as well as my past experiences as an arborist. (Lilly, 2001) Zeb Haney | Tree Resource | 253.350.4722 | info@treeresource.com February 26, 2022 Memorial Field Tree Inventory of 9 21 Discussions Condition and Structure Rating Tree condition is typically described as a factor of overall health and the structure of the tree. These are based on an evaluation of the foliage and buds, small twigs, scaffold branches, the trunk, the trunk ﬂare, any roots that may be visible, and the general site condition around the tree. Poor - These are trees that have poor health, major structural defects that inﬂuence potential stability. This trees will not likely survive on site long-term without extensive mitigation efforts. This category includes dead trees. (However, there are cases where a dead tree will have sufﬁcient structure to warrant consideration as a standing dead snag for ecological purposes.) Fair - Trees with fair health and structure will have some issues with vigor and may have some major structural defects. With extensive mitigation they can be retained but will likely need long-term management. Good - Trees in good health and structure have only minor negative characteristics or even no visible defects. They are good candidates for retention and will need little if any follow-up care. Excellent - Any tree in excellent health and structure is likely to be signiﬁcant in terms of location, quality, or size. These may be young trees and will have a full crown with very good site characteristics. Suitability for Preservation The species characteristics, potential longevity, health, structure, and age class of a tree are factors that determine how suitable a tree is for preservation. I rate these using a scale of poor, fair, good, or excellent. These are described below: Poor - Trees in poor health and/or with signiﬁcant structural defects that cannot be mitigated. These will likely decline regardless of attempts to preserve them. Often these are species of trees with undesirable landscape characteristics or are incompatible with the future site development. Moderate - Trees with a fair suitability rating will have some less than optimal conditions that can be mitigated with intense management. They will requires greater areas of site protection and monitoring throughout the development process. It is probable that without this mitigation the tree will decline and/or have a shorter life span than a tree in good or excellent condition. Good - Trees with good suitability for preservation will have good condition structural characteristics and will have a high likelihood of long-term survivability. They will still need to have tree protection, but these will need less extensive, if any, mitigation, besides root zone restrictions. Zeb Haney | Tree Resource | 253.350.4722 | info@treeresource.com February 26, 2022 Memorial Field Tree Inventory of 10 21 Critical Root Zone A Critical Root Zone (CRZ) is established based on a trees condition and its size. The standard in the arboricultural industry is based on a calculation of between 6 to 18 times the diameter of the tree. The Federal Way Municipal Code deﬁnes a CRZ as 12 inches radius for every one inch of tree diameter measured at four and one-half feet above ground, which equates to 12 times the diameter. This is then factored up or down based on a tree’s age, species tolerance, and current condition. It’s generally accepted that if this formula is used and adhered to, trees will survive a development process. When considering which trees are best preserved in a development area, the CRZ can be implemented into site plans. Often it is recommended to preserve trees with overlapping CRZ to ensure the maximum numbers of trees are preserved. It is also important to note that smaller trees will have a much smaller CRZ needed and can be much easier to retain. Other tree protection requirements in the Federal Way Revised Code that should be considered when reviewing the tree inventory are: 19.120.160 (4) No soil disturbance, parking, storage, dumping, burning of materials, impervious surfaces, ﬁll, excavation, or storage of construction materials shall be permitted within the no disturbance area. 19.120.160 (5) If the grade level around the tree is to be raised by more than one foot, a rock well shall be constructed. The inside diameter of the rock well shall be equal to the diameter of the tree trunk plus 10 feet. Proper drainage, and irrigation if necessary, shall be provided in all rock wells. 19.120.160 (6) The grade level shall not be lowered within the larger of the drip line of the tree(s) or the critical root zone of the tree(s). 19.120.160 (7) No trenching is allowed in any critical tree root zone areas. 19.120.160 (8) No installation of any impervious surfaces is allowed in critical root zones. Where road or sidewalk surfaces are needed within critical root zones, unmortared porous pavers or ﬂagstone (rather than concrete or asphalt) may be used. Boardwalks or bridging may span root zones without harming the tree roots. 19.120.160 (9) Tree protection areas (i.e., critical root zone) must be prepared to better withstand the stresses of the construction phase by, if necessary, fertilizing, pruning, and mulching around them well in advance of beginning any construction activities. Zeb Haney | Tree Resource | 253.350.4722 | info@treeresource.com February 26, 2022 Memorial Field Tree Inventory of 11 21 Conclusions and Recommendations According to the Federal Way Revised Code 19.120.130 the minimum tree density in a BC zone requires 20 tree units per acre. Memorial Field at 8.7 acres has a minimum tree density requirement of 174 tree credits. The site currently has a density of 167 tree units. When deciding which trees to keep during the subsequent planning stages of the project consider some of the following factors: •Smaller trees with their smaller CRZ will be easier to work around. •Trees in poor condition should not be selected for retention unless they are in areas that will be free from disturbance. •Even though larger trees have greater tree units, their CRZ will often overlap areas needed for construction access. Zeb Haney | Tree Resource | 253.350.4722 | info@treeresource.com Tree Density Requirements Lot size = 8.7 acres 8.7 acres X 20 tree units = 174 tree units Image 6 - Tree Unit Calculation from Federal Way Revised Code. February 26, 2022 Memorial Field Tree Inventory of 12 21 Appendix A - Marked Up Topo-Survey The following pages (30 - 35) contain the client provided topographical survey marked up with the aluminum tag numbers. In some cases trees marked on the original topo-survey are shown as multi-stemmed, whereas I have them listed as two or more individual trees and vice versa. Zeb Haney | Tree Resource | 253.350.4722 | info@treeresource.com NO PARKING NO PARKING NO PARKING NO P A R K I N G NO PARKING NO PARKINGNO PARKINGNO PARKINGNO PARKINGNO PARKINGNO PARKINGNO P A R K I N G LINE TABLE 2215 North 30th Street, Suite 200 Tacoma, WA 98403 253.383.2422TEL 253.383.2572FAX www.ahbl.comWEB TACOMA SEATTLE SPOKANE TRI-CITIES 61 DFGD MARCH 17, 2021 2210075.50 DELIN HUANG 33330 8TH AVENUE SOUTH FEDERAL WAY, WA 98003 FEDERAL WAY PUBLIC SCHOOLS FEDERAL WAY HIGH SCHOOL MEMORIAL STADIUM A PORTION OF THE NE 1/4 OF THE NE 1/4 OF SEC. 08, TWN. 21 N., RGE. 04 E. W.M. CITY OF FEDERAL WAY, KING COUNTY, WASHINGTON. FEDERAL WAY HIGH SCHOOL MEMORIAL STADIUM 1 TOPOGRAPHIC SURVEY VERTICAL DATUM BASIS OF BEARING UTILITY NOTES EQUIPMENT USED SURVEYOR'S CERTIFICATE N GRAPHIC SCALE 0 20 40 FEET 1" = 20 FEET 10 LEGEND SHEET 4 SHEET 2 LINE TABLE 2215 North 30th Street, Suite 200 Tacoma, WA 98403 253.383.2422TEL 253.383.2572FAX www.ahbl.comWEB TACOMA SEATTLE SPOKANE TRI-CITIES 63 DFGD MARCH 17, 2021 2210075.50 DELIN HUIANG 33330 8TH AVENUE SOUTH FEDERAL WAY, WA 98003 FEDERAL WAY PUBLIC SCHOOLS FEDERAL WAY HIGH SCHOOL MEMORIAL STADIUM A PORTION OF THE NE 1/4 OF THE NE 1/4 OF SEC. 08, TWN. 21 N., RGE. 04 E. W.M. CITY OF FEDERAL WAY, KING COUNTY, WASHINGTON. FEDERAL WAY HIGH SCHOOL MEMORIAL STADIUM 3 TOPOGRAPHIC SURVEY N GRAPHIC SCALE 0 20 40 FEET 1" = 20 FEET 10 LEGEND SHEET 6 SHEET 4SHEET 4SHEET 2 LINE TABLE 2215 North 30th Street, Suite 200 Tacoma, WA 98403 253.383.2422TEL 253.383.2572FAX www.ahbl.comWEB TACOMA SEATTLE SPOKANE TRI-CITIES 64 DFGD MARCH 17, 2021 2210075.50 DELIN HUIANG 33330 8TH AVENUE SOUTH FEDERAL WAY, WA 98003 FEDERAL WAY PUBLIC SCHOOLS FEDERAL WAY HIGH SCHOOL MEMORIAL STADIUM A PORTION OF THE NE 1/4 OF THE NE 1/4 OF SEC. 08, TWN. 21 N., RGE. 04 E. W.M. CITY OF FEDERAL WAY, KING COUNTY, WASHINGTON. FEDERAL WAY HIGH SCHOOL MEMORIAL STADIUM 4 TOPOGRAPHIC SURVEY N GRAPHIC SCALE 0 20 40 FEET 1" = 20 FEET 10 LEGEND SHEET 5 SHEET 3SHEET 3SHEET 1 LINE TABLE 2215 North 30th Street, Suite 200 Tacoma, WA 98403 253.383.2422TEL 253.383.2572FAX www.ahbl.comWEB TACOMA SEATTLE SPOKANE TRI-CITIES 65 DFGD MARCH 17, 2021 2210075.50 DELIN HUIANG 33330 8TH AVENUE SOUTH FEDERAL WAY, WA 98003 FEDERAL WAY PUBLIC SCHOOLS FEDERAL WAY HIGH SCHOOL MEMORIAL STADIUM A PORTION OF THE NE 1/4 OF THE NE 1/4 OF SEC. 08, TWN. 21 N., RGE. 04 E. W.M. CITY OF FEDERAL WAY, KING COUNTY, WASHINGTON. FEDERAL WAY HIGH SCHOOL MEMORIAL STADIUM 5 TOPOGRAPHIC SURVEY N GRAPHIC SCALE 0 20 40 FEET 1" = 20 FEET 10 LEGENDSHEET 6SHEET 4 LINE TABLE 2215 North 30th Street, Suite 200 Tacoma, WA 98403 253.383.2422TEL 253.383.2572FAX www.ahbl.comWEB TACOMA SEATTLE SPOKANE TRI-CITIES 66 DFGD MARCH 17, 2021 2210075.50 DELIN HUIANG 33330 8TH AVENUE SOUTH FEDERAL WAY, WA 98003 FEDERAL WAY PUBLIC SCHOOLS FEDERAL WAY HIGH SCHOOL MEMORIAL STADIUM A PORTION OF THE NE 1/4 OF THE NE 1/4 OF SEC. 08, TWN. 21 N., RGE. 04 E. W.M. CITY OF FEDERAL WAY, KING COUNTY, WASHINGTON. FEDERAL WAY HIGH SCHOOL MEMORIAL STADIUM 6 TOPOGRAPHIC SURVEY N GRAPHIC SCALE 0 20 40 FEET 1" = 20 FEET 10 LEGENDSHEET 5SHEET 3 NO PARKINGLINE TABLE 2215 North 30th Street, Suite 200 Tacoma, WA 98403 253.383.2422TEL 253.383.2572FAX www.ahbl.comWEB TACOMA SEATTLE SPOKANE TRI-CITIES 62 DFGD MARCH 17, 2021 2210075.50 DELIN HUIANG 33330 8TH AVENUE SOUTH FEDERAL WAY, WA 98003 FEDERAL WAY PUBLIC SCHOOLS FEDERAL WAY HIGH SCHOOL MEMORIAL STADIUM A PORTION OF THE NE 1/4 OF THE NE 1/4 OF SEC. 08, TWN. 21 N., RGE. 04 E. W.M. CITY OF FEDERAL WAY, KING COUNTY, WASHINGTON. FEDERAL WAY HIGH SCHOOL MEMORIAL STADIUM 2 TOPOGRAPHIC SURVEY N GRAPHIC SCALE 0 20 40 FEET 1" = 20 FEET 10 LEGEND SHEET 3 SHEET 1 February 26, 2022 Memorial Field Tree Inventory of 19 21 Appendix B - Bibliography Accredited Standards Committee. ANSI A300 (Part 5) - 2019 Tree Shrub and Other Woody Plant Maintenance - Standard Practices (Management of Trees and Shrubs During Site Planning, Site Development, and Construction. Londonderry, NH: Tree Care Industry Association, 2019 Dunster, Julian; et al. Tree Risk Assessment Manual. Champaign, IL: International Society of Arboriculture, 2013 Fite, Kelby; Smiley, E. Thomas. Best Management Practices Managing Trees During Construction, Second Edition 2016. Champaign, IL: International Society of Arboriculture, 2016 Lilly, Sharon. Arborists’ Certiﬁcation Study Guide. Champaign, IL: The International Society of Arboriculture, 2001 Oregon State University Extension Service. Tree Protection on Construction and Development Sites. Oregon State University, 2009 Zeb Haney | Tree Resource | 253.350.4722 | info@treeresource.com February 26, 2022 Memorial Field Tree Inventory of 20 21 Appendix C - Assumptions & Limiting Conditions 1.Consultant assumes that any legal description provided to Consultant is correct and the title to property is good and marketable. Consultant assumes no responsibility for legal matters. Consultant assumes all property appraised or evaluated is free and clear, and is under responsible ownership and competent management. 2.Consultant assumes that the property and its use do not violate applicable codes ordinances statutes or regulations. 3.Although Consultant has taken care to obtain all information from reliable sources and to verify the data in so far as possible, Consultant does not guarantee and is not responsible for the accuracy of information provided by others. 4.Client may not require Consultant to testify or attend court by reason of any report unless mutually satisfactory contractual arrangements are made, including payment of additional fee for such Services. 5.Unless otherwise required by law, possession of this report does not imply right of publication or use for any purpose by any person other than the person to whom it is addressed, without the prior express written consent of the Consultant. 6.Unless otherwise required by law, no part of this report shall be conveyed by any person, including the client, the public through advertising, public relations, news, sales or other media without the Consultant’s prior express written consent. 7.This report and any values expressed herein represent the opinion of the Consultant, and the Consultant’s fee is in no way contingent upon the reporting of a speciﬁc value, stipulated result, the occurrence of a subsequent event or upon any ﬁnding to be reported. 8.Sketches, drawings and photographs in this report, being intended as visual aids, are not necessarily to scale and should not be construed as engineering or architectural reports or surveys. The reproduction of any information generated by architects, engineers or other consultants at any sketches, drawings or photographs is for the express purpose of coordination and easy reference only inclusion of such information on any drawings or other documents does not constitute a representation by Consultant to the sufﬁciency or accuracy of the information. 9.Unless otherwise agreed, (1) information contained in this report covers only the items examined and reﬂects the condition of those items at the time of inspection; and (2) the inspection is limited to visual examination of accessible items without dissection, excavation, probing, climbing, or coring. Consultant makes no warranty or guarantee, express or implied that the problems or deﬁciencies of the plans or property in question may not arise in the future. 10.Loss or alteration of any part of this agreement invalidates the entire report. Zeb Haney | Tree Resource | 253.350.4722 | info@treeresource.com February 26, 2022 Memorial Field Tree Inventory of 21 21 Appendix D - Certiﬁcation of Performance I, Zebadiah J. Haney, certify that: 1.I have personally inspected the trees in properties referred to in this report and have stated my ﬁndings accurately. 2.I have no current or prospective interest in the tree or the property that is the subject of this report and have no personal interest or bias with respect to the parties involved. 3.The analysis, opinions and conclusions as stated herein are my own and are based on current scientiﬁc procedures and facts. 4.My analysis, opinions, and conclusions were developed in this report has been prepared according to commonly accepted arboricultural practices. 5.No one provided signiﬁcant professional assistance to me, except as indicated within the report. 6.My compensation is not contingent upon the reporting of a predetermined conclusion that favors the cause of the client or any other reporting party nor upon the results of the assessment, the attainment of stipulated results, or the occurrence of any subsequent events. I further certify that I am a Registered Consulting Arborist® with the American Society of Consulting Arborists (ASCA) and that I adhere to the ASCA Standards of Professional Practice. I am a Board Certiﬁed Master Arborist® and a Certiﬁed Tree Worker Climber Specialist® through the International Society of Arboriculture (ISA). I have been involved with the practice of Arboriculture since 1999. Zeb Haney | Tree Resource | 253.350.4722 | info@treeresource.com Zeb Haney ISA BCMA #PN-5850BT ASCA RCA #616