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Home My WebLink About16.1 Amended Alpine Retained Tree Inspection report_sig Greenforest Incorporated C o n s u l t i n g A r b o r i s t 4547 South Lucile Street, Seattle, WA 98118 Tel. 206-723-0656 TO: Paul Ollestad, Land Development Manager Toll Brothers 9720 NE 120th Place, #100 Kirkland, WA 98034 REFERENCE: AMENDED Alpine Retained Tree Inspection Report DATE: September 25, 2017 PREPARED BY: Favero Greenforest, ISA Certified Arborist # PN -0143A ISA Tree Risk Assessment Qualified ASCA Registered Consulting Arborist® #379 You retained my services as a consulting arborist. Final grading is completed at the above referenced project. You are required by City to provide, to the current planning project manager, tree retention inspection/monitoring reports after initial clearing, final grading, and annually for two years by a qualified professional forester. The inspection/monitoring reports shall identify any retained trees that develop problems due to changing site conditions and prescribe mitigation. I visited the site 9/18/2017 and inspected the retained trees on the site. All but three of the retained trees stand upon a TRACT at the eastern portion of the project. The three single trees stand at the west end of the project, between Road B and SE 144th Street, along a shared Lot boundary. [This is amended from my 9/25/17 report. I returned to the site yesterday and counted all trees on site of regulated size, including the 16-dead/dying trees inventoried in attachment 3. The total tree count on this site is 129. The retained tree count is 113.] I identified 16 trees with visible problems; 12 are listed as Retained Trees. (See attachment.) The problems visible with the subject trees range from thinning canopies, significant lean, dead top of tree or whole tree death. Some of the retained trees had visible problems at the time of my January 2015 inspection, and are listed in the attached table. Paul Ollestad, Toll Brothers RE: AMENDED Alpine Retained Tree Inspection Report October 24, 2017 Page 2 of 5 Greenforest Registered Consulting Arborist Tree 5902 was showing visible signs of decline in 2015. Since then, it, and tree 5904 have died. Trees 5680 and 6062 are showing similar symptoms, which appear to be caused by a root rot infection. This problem was likely in place prior to any site clearing and at the time of my first inspection. Six cedar trees are dying from the top down (5893, 5931, 5940, 5941, 5967 and 5973) and one non-retained tree has died (5887). This dieback pattern is visible on other forested area throughout the region, and does not appear to be a result of the changing site conditions on this site. Tree 5927 was marked ‘24’ in the field with orange paint (along with other trees with visible problems). This tree is naturally suppressed by adjacent trees, and its current condition is not a result of site clearing/grading. I expect this tree to continue to grow in its current suppressed state for some time. Tree 5947 is dead and has uprooted and leans toward the center of the TRACT. This occurred without any visible soil disturbance or root injury. It appears to me that the visible signs of tree decline and death are the result of natural process within a forest, and not the direct result of site changes from grading and clearing. I visited the site yesterday and performed a count of all trees on the site of regulated size: a total of 129. This includes 3 trees on a building lot near SE 144th Street, and 126 trees in the retention tract at the south end of the project. This total of 129 includes the 16-dead/dying trees in attachment 3: 12 retained, and 4 non- retained. Regulated Trees on Site 129 Dead/Dying Retained (12) Dead/Dying Non-Retained (4) TOTAL RETAINED TREES 113 Excluding the 16-dead/dying trees, there are 113 Retained trees on site. Attachments: 1. Assumptions & Limiting Conditions 2. Certification of Performance 3. Table of Inspection Results Paul Ollestad, Toll Brothers RE: AMENDED Alpine Retained Tree Inspection Report October 24, 2017 Page 3 of 5 Greenforest Registered Consulting Arborist Attachment No. 1 - Assumptions & Limiting Conditions 1) A field examination of the site was made September 18 and October 24, 2017. My observations and conclusions are as of that date. 2) Care has been taken to obtain all information from reliable sources. All data has been verified insofar as possible; however, the consultant/arborist can neither guarantee nor be responsible for the accuracy of information provided by others. 3) The consultant/appraiser shall not be required to give testimony or to attend court by reason of this report unless subsequent contractual arrangements are made. 4) Construction activities can impact trees in unpredictable ways. All retained trees should be inspected at the completion of construction, and regularly thereafter as part of ongoing maintenance. 5) The consultant does not assume any liability for the subject tree and does not represent the transfer of such for any risks associated with the tree from the landowner to the consultant. Risk management is solely the responsibility of the landowner. Paul Ollestad, Toll Brothers RE: AMENDED Alpine Retained Tree Inspection Report October 24, 2017 Page 4 of 5 Greenforest Registered Consulting Arborist Attachment No. 2 - Certification of Performance I, Favero Greenforest, certify that: • I have personally inspected the trees and the property referred to in this report and have stated my findings accurately. • I have no current or prospective interest in the vegetation or the property that is the subject of this report and have no personal interest or bias with respect to the parties involved. • The analysis, opinion, and conclusions stated herein are my own and are based on current scientific procedures and facts. • My analysis, opinion, and conclusions were developed and this report has been prepared according to commonly accepted arboricultural practices. • No one provided significant professional assistance to me, except as indicated within the report. • My compensation is not contingent upon the reporting of a predetermined conclusion that favors the cause of the client of any other 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 member in good standing of International Society of Arboriculture (ISA), and the ISA PNW Chapter, I am an ISA Certified Arborist (#PN-0143A) and am Tree Risk Assessment Qualified, and am a Registered Consulting Arborist® (#379) with American Society of Consulting Arborists. I have worked as an independent consulting arborist since 1989. Signed: GREENFOREST, Inc. By Favero Greenforest, M. S. Date: October 24, 2017 Paul Ollestad, Toll Brothers RE: AMENDED Alpine Retained Tree Inspection Report October 24, 2017 Page 5 of 5 Greenforest Registered Consulting Arborist Attachment No. 3 – Inspection Results Retained Tree Survey No. Orange No. DBH Tree Species Report Comment From 2015 Current Condition from 2017 Inspection Prescription YES 5680 20” FIR Very thin foliage in canopy. Tree likely to die within 3 years. Monitor YES 5893 31 12” Cedar 1/2 of tree top is dead No action at this time; tree poses low risk; dead top is great wildlife habitat; reassess again in 1 year. YES 5902 59 36” Fir Decline Dead Create wildlife habitat snag; reduce tree to 30 feet height YES 5904 60 36” Fir Dead YES 5927 24 12” Fir Naturally suppressed top No action recommended. Tree has a very small canopy- it is suppressed by adjacent trees. YES 5931 40 15” Cedar 1/2 of tree top is dead No action at this time; tree poses low risk; dead top is great wildlife habitat; reassess again in 1 year. YES 5940 39 20” Cedar 2/3 of tree top is dead YES 5941 51 20” Cedar 2/3 of tree top is dead YES 5947 45 10” Fir Suppressed Dead, leaning into center of TRACT Remove and replace YES 5967 75 24” Cedar 2/3 of tree top is dead No action at this time; tree poses low risk; dead top is great wildlife habitat; reassess again in 1 year. YES 5973 53 26” Cedar 2/3 of tree top is dead YES 6062 20” FIR Very thin foliage in canopy. Tree likely to die within 3 years. Monitor ‘NON-RETAINED’ TREES TO BE RMEOVED No 5883 32 18” Fir Tree is nearly dead Remove tree or create wildlife habitat snag; reduce tree to 20 feet height No 5885 33 8” Fir Topped Tree is nearly dead No 5887 9 9” Cedar Dead No 5908 8” Alder Dead Dead, woodpecker friendly Trees are not tagged. For in-field verification, use ‘Orange No.’ painted on tree trunk.