Loading...
HomeMy WebLinkAboutEX09_ArboristReportAddendumPage 1 of 9 Trees 97-101 Maple Highlands (aka Chambers Plat) Cody Herron ABC Herron Tree LLC 425-293-2443 ISA Certified Arborist #PN-6967A Certified Tree Risk Assessor mountainredd@comcast.net Certified Tree Risk Assessor (TRAQ) Journeyman Tree Trimmer ISA certified Arborist PN-6967A December 2, 2023 The Connor Homes Group, LLC Attn: Dalton Smith 12600 SE 38th St, Suite 250 Bellevue, WA 98006 RE: Addendum to Arborist Report dated May 23, 2023 Property Owner: Paula Chambers Property Owner: Theresa Bagnell Address: 13818 152nd Ave SE Address: 13929 154th Ave SE Renton, WA 98059 Renton, WA 98059 Parcel#: 1463400021 Parcel #: 1463400020 Lot Size: 131,551 sq ft Lot Size: 49,658 sq ft Dear Mr. Smith, ABC Herron Tree LLC is pleased to submit this addendum to the report dated May 23, 2023 for this project. This report addresses the Hearing Examiner’s concerns regarding trees 97-101 as described in the previous arborist reports for this project. The concerns are as follows: Please feel free to contact me with any questions you may have. Yours, Cody Herron Docusign Envelope ID: EE0C67D3-B826-4CD0-836F-E718109BC413 Page 2 of 9 Trees 97-101 Maple Highlands (aka Chambers Plat) Cody Herron ABC Herron Tree LLC 425-293-2443 ISA Certified Arborist #PN-6967A Certified Tree Risk Assessor mountainredd@comcast.net Tree Retention Plan Detail Figure 1 Docusign Envelope ID: EE0C67D3-B826-4CD0-836F-E718109BC413 Page 3 of 9 Trees 97-101 Maple Highlands (aka Chambers Plat) Cody Herron ABC Herron Tree LLC 425-293-2443 ISA Certified Arborist #PN-6967A Certified Tree Risk Assessor mountainredd@comcast.net Photo 1 Figure 2 This photo shows the trees standing on the south side looking north. Tree 97 Tree 98 Tree 99 Tree 100 Tree 101 Docusign Envelope ID: EE0C67D3-B826-4CD0-836F-E718109BC413 Page 4 of 9 Trees 97-101 Maple Highlands (aka Chambers Plat) Cody Herron ABC Herron Tree LLC 425-293-2443 ISA Certified Arborist #PN-6967A Certified Tree Risk Assessor mountainredd@comcast.net Detail from Arborist Report dated 1/28/22 Figure 3 Assignment On November 7, 2023, I was contacted by Dalton Smith, Director of Land Operations for Conner Homes and asked to provide additional analysis regarding Trees 97-101 on lots 5 and 6 to address the concerns noted by the Hearing Examiner’s office as shown below in Figure 4. Please refer to the map in Figure 1 above for the location of these trees. Figure 4 Docusign Envelope ID: EE0C67D3-B826-4CD0-836F-E718109BC413 Page 5 of 9 Trees 97-101 Maple Highlands (aka Chambers Plat) Cody Herron ABC Herron Tree LLC 425-293-2443 ISA Certified Arborist #PN-6967A Certified Tree Risk Assessor mountainredd@comcast.net Discussion and Conclusion Using the formula outlined on page 24 of the United States Department of Agriculture Tree Owner’s Manual (Adapted to the City of Renton) available on the city’s website at Tree Owner's Manual for the Northeastern and Midwestern United States, NA-FR-04=07 (civiclive.com) the Protected Root Zones (PRZ) for trees 97-101 are calculated by multiplying the Diameter at Breast Height of the tree times 1.5. This is the radius in feet from the trunk of the tree that is considered the PRZ. Figure 5 For trees # 97,98,99,100 and 101 disturbances within no more than one-third of the area within the outer half of the area within the PRZ of each tree should be allowed. It is not recommended to disturb the ground within the inner PRZ of each tree, which is the area encircling the base of a tree equal to one half the diameter of the PRZ. Excavation within the area of encroachment should be done by hand to the greatest extent possible to minimize root disturbance and damage. During excavation inside of the allowable area I will recommend that an arborist be onsite to perform root pruning as needed. Clean flush cutting of roots will help protect the tree from fungal infection and allow for proper healing. Docusign Envelope ID: EE0C67D3-B826-4CD0-836F-E718109BC413 Page 6 of 9 Trees 97-101 Maple Highlands (aka Chambers Plat) Cody Herron ABC Herron Tree LLC 425-293-2443 ISA Certified Arborist #PN-6967A Certified Tree Risk Assessor mountainredd@comcast.net Figure 6 Figure 7 Docusign Envelope ID: EE0C67D3-B826-4CD0-836F-E718109BC413 Page 7 of 9 Trees 97-101 Maple Highlands (aka Chambers Plat) Cody Herron ABC Herron Tree LLC 425-293-2443 ISA Certified Arborist #PN-6967A Certified Tree Risk Assessor mountainredd@comcast.net The following are the calculations for each of these trees based on the measurements recorded in the American Forest Management report. Tree protection fencing should be established as outlined in my previous report dated May 23, 2023. Tree #97 DBH = 31” 31 x 1.5 = 46.5 = r PRZ = πr2 = π x 46.52 = 6792.91 sq ft Inner Half of PRZ = π(r/2)2 = 1698.23 sq ft Area of Outer Half of PRZ = 6792.91 – 1698.23 = 5094.68 sq ft 1/3 of Area of Outer Half of PRZ = 5094.68/3 = 1698.23 sq ft allowable area of encroachment Tree #98 DBH = 16” 16 x 1.5 = 24 = r PRZ = πr2 = π x 242 = 1809.56 sq ft Inner Half of PRZ = π(r/2)2 = 452.39 sq ft Area of Outer Half of PRZ = 1809.56 – 452.39 = 1357.17 sq ft 1/3 of Area of Outer Half of PRZ = 1357.17/3 = 452.39 sq ft allowable area of encroachment Tree #99 DBH = 26” 26 x 1.5 = 39 = r PRZ = πr2 = π x 392 = 4778.36 sq ft Inner Half of PRZ = π(r/2)2 = 1194.59 sq ft Area of Outer Half of PRZ = 4778.36 – 1194.59 = 3583.77 sq ft 1/3 of Area of Outer Half of PRZ = 3583.77/3 = 1194.59 sq ft allowable area of encroachment Tree #100 DBH = 38” 38 x 1.5 = 57 = r PRZ = πr2 = π x 572 = 10207.03 sq ft Inner Half of PRZ = π(r/2)2 = 2551.76 sq ft Area of Outer Half of PRZ = 10207.03 – 2551.76 = 7655.27 sq ft 1/3 of Area of Outer Half of PRZ = 7655.27/3 = 2551.76 sq ft allowable area of encroachment Tree #101 DBH = 31” 31 x 1.5 = 46.5 = r PRZ = πr2 = π x 46.52 = 6792.91 sq ft Inner Half of PRZ = π(r/2)2 = 1698.23 sq ft Area of Outer Half of PRZ = 6792.91 – 1698.23 = 5094.68 sq ft 1/3 of Area of Outer Half of PRZ = 5094.68/3 = 1698.23 sq ft allowable area of encroachment Docusign Envelope ID: EE0C67D3-B826-4CD0-836F-E718109BC413 Page 8 of 9 Trees 97-101 Maple Highlands (aka Chambers Plat) Cody Herron ABC Herron Tree LLC 425-293-2443 ISA Certified Arborist #PN-6967A Certified Tree Risk Assessor mountainredd@comcast.net References: ANSI Z133.1-2000 ANSI A300 (Pat 1) – 2008 American National Standards Institute. ANSI A300 part 5 & BMP Managing Trees During Construction second edition 2016 Kelby Fite, Thomas Smiley. American National standard for Tree Care Operations: Tree, Shrub and Other Woody Plant Maintenance: Standard Practices (Pruning). New yok: Tree Care Industry Association, 2008. Coder, Dr. Kim D. Construction Damage Assessments: Tree and Sites. University of Georgia. October 1996. Ashley, Burl S. 1980 Reference handbook for foresters. USDA NA-FR-15. 35 pp. Dirr, Michael A. Manual of Woody Landscape Plants, Their Identification, Ornamental Characteristics, Culture, Propagation, and Uses. Champaign: Stipes Publishing Company, 1990. Dunster & Associates Environmental Consultants Ltd. Assessing Trees in Urban Areas and the Urban- Rural Interface. US Release 1.0. Silverton: Pacific Northwest Chapter ISA, 2006. Dunster, J. A. 2003. Preliminary Species Profiles for Tree Failure Assessment. Bowen Island: Dunster & Associates Environmental Consultants Ltd. Dunster, Julian A., E. Thomas Smiley, Nelda Matheny, and Sharon Lilly. Tree Risk Assessment Manual. Champaign, Illinois: International Society of Arboriculture, 2013. Harris, Richard W, James Clark, and Nelda Matheny. Arboriculture, Integrated Management of Landscape Trees, Shrubs, and Vines. 4th ed. Upper Saddle River: Prentice Hall, 2004. Lilly, Sharon. Arborists’ Certification Study Guide. Champaign, IL: The International Society of Arboriculture, 2001. Matheny, Nelda and Clark, James R. A Photographic Guide to the Evaluation of Hazard Trees in Urban Areas. Second Edition. Champaign, IL: The International Society of Arboriculture, 1994. Matheny, Nelda and Clark, James R. Trees and Development: A Technical Guide to Preservation of Trees during Land Development. Champaign, IL: The International Society of Arboriculture, 1998. Mattheck, Claus and Breloer, Helge. The Body Language of Trees: A Handbook for Failure Analysis. London: HMSO, 1994 Schwarze, Francis W.M.R. Diagnosis and Prognosis of the Development of Wood Decay in Urban Trees. Australia: ENSPEC Pty Ltd. 2008 Sinclair, Wayne A., Lyon, Howard H., and Johnson, Warren T. Diseases of Trees and Shrubs. Ithaca, New York: Cornell University Press, 1987.Prince, Susan Duvall Visual Tree Assessment Feb 2018. Smiley, E. Thomas, Nelda Matheny, and Sharon Lilly, Tree Risk Assessment Best Management Practices, ANSI A300 Part 9: Tree, Shrub, and Other Woody Plant Management— Standard Practices (Tree Risk Assessment: Tree Structure Assessment). The International Society of Arboriculture Press. Champaign. IL. 2011. Thies, Walter G. and Sturrock, Rona N. Laminated root rot in Western North American. United States Department of Agriculture. Pacific Northwest. Resource Bulletin PNW-GTR-349. April 1999. USDA Regions 6 Root Diseases in Oregon and Washington Conifers James S. Hadfield, Donald J. Goheen, Gregory M. Filip, Craig L. Schmitt, Robert D. Harvey Docusign Envelope ID: EE0C67D3-B826-4CD0-836F-E718109BC413 Page 9 of 9 Trees 97-101 Maple Highlands (aka Chambers Plat) Cody Herron ABC Herron Tree LLC 425-293-2443 ISA Certified Arborist #PN-6967A Certified Tree Risk Assessor mountainredd@comcast.net Waiver of Liability There are many conditions affecting a tree’s health and stability, which may be present and cannot be ascertained, such as root rot, previous or unexposed construction damage, internal cracks, stem rot and more which may be hidden. Changes in circumstances and conditions can also cause a rapid deterioration of a trees’ health and stability. Adverse amount of time. While I have used every reasonable means to examine these trees, this evaluation represents my opinion of the tree’s health at this point in time. These findings do not guarantee future safety nor are they predictions of future events. Any legal description provided to the consultant-appraiser is assumed to be correct. Any titles and ownerships to any property are assumed to be good and marketable. No responsibility is assumed for matters legal in character. All property is appraised or evaluated as free and clear, under responsible ownership and competent management the tree evaluation consists of an external visual inspection of an individual tree’s root flare, trunk, and canopy from the ground. Care has been taken to obtain all information from reliable sources. All data has been verified insofar as possible; however, the consultant/appraiser can neither guarantee nor be responsible for the accuracy of information provided by others. Sketches, maps, diagrams, graphs, and photographs in this report, being intended as visual aid, are not necessarily to scale and should not be construed as engineering or architectural reports or survey. As conditions change, it is the responsibility of the property owners to schedule additional site visits by the necessary professionals to ensure that the long-term success of the project is insured. It is the responsibility of the property owner to obtain all required permits form city, county state, for federal agencies. It is the responsibility of the property owner to comply with all applicable laws, regulations, and permit conditions. If there is a homeowner’s association, it is the responsibility of the property owner to comply with all Codes, Covenants, and Restrictions (CC&R’s) that apply to tree pruning and tree removal. This tree evaluation is to be used to inform and guide the client in the management of their trees. This in no way implies that the evaluator is responsible for performing recommended actions or using other methods or tools to further determine the extent of internal tree problems without written authorizations from the client. Furthermore, the evaluator in no way holds that the opinions and recommendations are the only actions required to ensure that the tree will not fail. A second opinion is recommended. The client shall hold the evaluator harmless for any and all injuries of damages incurred if the evaluator’s recommendations are not followed of for acts of nature beyond the evaluator’s reasonable expectations, such as severer winds, excessive rains, heavy snow loads, etc. The consultant/appraiser shall not be required to give testimony or to attend court by reason of the report unless subsequent contractual arrangements are made including payment of an additional fee for such services as described in the fee schedule and contract of engagement. This report and all attachments, enclosures, and references are confidential and are for the use of the client concerned. Loss or alteration of any part of this report invalidates the entire report. They may not be reproduced, used in any way of dispersed in any form without the prior consent of the client concerned and ABC Herron Tree LLC. This report constitutes a whole. No single piece of part can be used without the entire text. Any use or restricted copying nullifies the entire report. Docusign Envelope ID: EE0C67D3-B826-4CD0-836F-E718109BC413