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TR-2022-047 - Applicant Arborist Report Community Development Department Planning Division •- • A••' • Case # 1 14 Application Number(s) Tree vs Building Conflict A•• • Body: Approval Date 1 15/23 Glenbrook GardenApartments Signature Catherine Tarone 10100 Mary Ave, Cupertino, Case Manager June I 2021 .' k � LF , ' f rY • _ �'i [. Fr + ,�.{Fes. r. �•'. - � �4 _ n' �• s,�'c} y� 'S Prepared for. ACCO Management Company 1 East Dana Street • •414 Prepared by. Donald r Certified Master Arbodst drtreelove@gmaii.com 1 Co n f W S,,�EEW p11W la 1M b MjVh Fupertino June 30,2021 A�t[i8�1�5Tvi4 %96"gNTno CUPERTINO Case# Don ccT)R,ROWeRd9rit certified arborist, has been contracted by the management comp ic8fcG%,nb13bk Garden Apartments in Cupertino California, to assess and Approva I Bodoyul�leecto e/5taion with a problematic tree on the property. Approva I D As4�(� p , management company is to remove the tree to prevent _ __'J Signature furdiefiEprwerfc hdamage, and to facilitate the building structural repairs. Case Manager The arborist site visit took place on June 29, 2021. Plans, regulations and published tree protection standards used for site and tree assessment are: Site Map of Glenbrook Apartments provided by ACCO Management. Best Management Practices: Tree Risk Assessment (2nd Edition) (A publication of the International Society of Arboriculture) DESCRIPTION OF TREE AND PROBLEM ISSUE The subject tree is a coast redwood (Sequoia sempervirens), located at 10125 Mary Ave, Building 14. It has a trunk diameter of 41 inches at breast height, a vertical height of about 120 feet. The management problems associated with this tree are: • It is unsustainable due to the fact that this is a very large growing tree species, planted in a restricted space that does not allow for expansion of girth and root development. Encroachment into hardscape and building structure, and resultant property damage has been in progress for several years. • The basal root flare of the tree trunk is right up against the building and chimney structure. Damage is in progress and more is inevitable if left unersolved. • Invasive root growth and root crown expansion has already heaved and cracked the adjacent brick chimney structure, displaced a storage unit, and roots have damaged flooring inside the adjacent apartment unit. • Urgent repairs necessitate cutting of major structural roots and root crown, a process that will destabilize the tree and create a high risk situation for property damage and/or personal injury. Co June 30,2021 r^I 1 1�.� 11�.h. A�' CUPERTINO . . . 1� Approva I i0Q'�` A• • • er Signature e Fr Base f 1' 1 r i� 1redwoodtree in closeproximity 1 building and pavement. Displaced storage / brick • r' i � F ?'2 �s,'+r •i f it r ��' k �* � 61'gt•�" '{ �' � Root collargrowth Istructuraldamage / safety hazards. 3 Con# K*MW, �16MWAt"""M4%fupertlno June 30,2021 Planning Division — Cupertino CUPERTINO ARBORI&A MENDATION Case# I R-2022-047 RemoQWitstid t6rPA1i4)ed as unavoidable and urgent for the subject tree, one 41" DBH coast Approva I B6*wBo ector/Staff ApprovaI D r,,J,jlR§Q ;� ro���it of poor ^riginal planning and placement of the tree which was Signature neathwa&ftaMe beyond a 20-year time frame for this large growing species. It's now 40 — 50 yearg�o4d eW,over-mature for the site. There is high risk associated with root cutting to facilitate essential property repairs. This is not possible to mitigate by any reasonable means other than removal of the entire tree. The location of the tree in proximity to the high use areas of the apartment complex, represent substantial targets for property damage and personal injury if the tree were to fail structurally. So risky root cutting is not an option. Donald W. Cox, ISA Board Certified Master Arborist WE-3023BUM 4 Con4ftWYtW.WpIC**pfID �Tz " lFuperdno June 30,2021 Planning Division — Cupertino CuFLRTINO APPROVED Case # TR-20 Application ulnbei L...ENBROOK Approval Body: Director/ taff P A R T M E N T S Approva I Date 01/05/2 —"' --�- 1011N �.101tl0 10171 r�� Signature Catherine T,ax9 I L�;;p}�'o 1° 19"' 'LLB rf--I =ram i e 71 to 6 ( = 1 ) 3 7 9 I Casu.P 1 # 1, jjr 6S 32 31 1a1r�a 1 1 -7 021 1 5 10190 3 GO _ iTTfTiVOCK)L�` x 10491 '�f0161 �� �}7 4 9 i i � 4 ¢ ' 1o1eo 28 & J0 7 . i# 1o19s 51 52 '33 t1=11[l11fu 10:0} .t g 110183 11111ti1 E11 sr wens ..... 1 o 40 i449 — n-,, # 41 f a 6,A 191241 6Pocx � © .36l 1 P I WJ44 j 21M 37 1ta4 r-' =44 Cf f 1, s, B25 65 j luxss42 + 1a1w24.. 10S10 4 f 1 =1xeT e 4 3 f I 1 $ 19:s4 I 1 f2 y 12 — �fFfIR�TA*AII' ' M1% TTT. 13 10175 10134 i 101.-4 MW f 1e261 4 ri g lelel �� 1SSSFl LQ1. a Jiit��fa �4FooL• n If i5tolls _ loxes c � T J819 \ � I 10114 wlTo Im!) � I T ——lexT4 IJ �17 GLENB !I��Ifo1 �e1FC f A P A ! T ' SWAPW'i