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TR-2019-04 Combined Plans.pdf10371 Leola Ct Silver Maple Assess��ient 14 January 20_9 Eric Wu, c/o Connie Carson 4170 Alta Mesa Ave Palo Alto, CA 94306 R€: ASSESSMENT OF ONE SILVER MAPLE AT 10371 LEOI A C T IN CUPERTINO, CA. Dear Mr. Wu, Connie Carson requested that I inspect a tree in the rear yard of 10371 Leola Court, to support an application for removal with the City of Cupertino. I performed my inspection on January 13, 2019. My findings and recommendations herein are based solely on a visual inspection from the ground on January 13. No advanced assessments were performed as part of this assignment. Description of the Tree The tree is a Silver maple (Acer saccharine) in the rear yard of 10371 Leola Court, in Cupertino, California. Trunk diameter is 37 inches at 54 inches above grade. The tree has been "topped" previously for high voltage line clearance, leaving many large -diameter pruning wounds. At each wound is a spray of 6 to 12 epicormic shoots. Additionally, each of these wounds show signs of wood decay and there is no visible callous growth. A previously failed 12 -inch diameter limb was still on the ground at the time of my inspection. It was completely rotted throughout, and landed on the back patio, directly next to the barbeque grill. Due to the lack of vigor and absence of callous growth I assess the tree to be in poor health. Because of past topping, aggressive re -sprouting: multiple areas of decay, and the previous failure, I assess the structure of the tree to be very poor. The overall condition rating for the tree is also very poor. Photo 1. Silver maple in rear yard of 10371 Leola Court. Multiple heading cuts with no callous growth; decay at each pruning wound. A failed 12 - inch diameter limsh was on the ground at the time of my inspection (red oval). HEARTWOOD CONSULTING ARBORISTS Page 1 of 4 matthew@heartwoodarborists.com — 650.542.8733 101371 Leola Ct Silver Maple Assessment 14 January 20419 Discussion Silver maples are fast growing trees. As with most fast-growing trees, they are also weak - wooded, poor compartmentalizers, and break apart readily. This particular tree has been managed .n a way that exacerbates the species' predisposition to failures. The biggest area of concern with this tree is the multiple sites of decay near and below previous topping cuts. There is no management option to arrest this decay, which will worsen with time, resulting in additional failures into an outdoor living space (rear patio). The absence of callous growth at these old pruning wounds is an indication that the tree lacks vigor, further reducing the tree's limited ability to compartmentalize and resist decay. These epicormic .shoots are a response to the aggressive heading cuts made on the tree. Epicormic shoots are poorly attached to the parent stem. They pose a higher risk of branch,/limb failure as they grow in length and diameter. Minimization of the risk requires careful repeated pruning treatments which are costly and impractical given the condition of this tree. Photo 2. A previously failed 12 -Inch diameter limb was still on the ground at the time of my inspection. it was completely rotted throughout and landed on the back patio, directly next to the barbeque grill. HEARTWOUI .ONSUtTING ARRORiSTS Wage 2 of 4 matthew@heartwoodarborists.com — 650.542.8733 10371 Leola Ct Silver Maple Assessment 14 January 2019 Conclusion and Recommendations The Silver maple behind 10371 Leola Court is in very poor condition, and there are no management options to improve the tree's health. Multiple large limbs are at risk of failing at any time. Therefore, 1 recommend that this tree be removed immediately. Please consult the City of Cupertino to obtain any necessary permits prior to trimming or removing the tree. If you have any questions, or I can be of further assistance, please do not hesitate to let me know. Sincerely, IffaNww 6--li l Matthew Fried ASCA Registered Consulting Arborist® # 651 ISA Certified Arborist® MA -4851A HEART WOOD CONSULTING ARRORISTS Page 3 of 4 matthew@heartwoodarborists.com — 650.542.8733 1037 4L Leola C t Silver Maple Assessment 14 January 21019 CERTIFICATION PERFORMANCE i, Matthew Fried, certify: ■ That I have personally inspected the tree's} and/or the property referred to in this report and have stated my findings accurately. The extent of the evaluation and appraisal is stated in the attached report and the Terms of Assignment; That 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; g Ti Hat the analysis, opinions, and conclusions stated herein are my own; ■ That my analysis, opinions, and conclusions were developed, and this report has been prepared according to commonly accepted arboricultural practices; a That no one provided significant professional assistance to the consultant, except as indicated within the report; ■ That my compensation is not contingent upon the reporting of a predetermined conclusion that favors the cause of the client or any other party. I further certify that I am Registered Consulting Arborist® with the American Society of Consulting Arbonsts, and acknowledge, accept, and adhere to the ASCA Standards of Professional Practice. I am an International Society of Arboriculture Certified Arborist and have been involved in the practice of arboriculture and the study of trees for over twelve years. HAVetw f4�a Matthew t=ried ASCA Registered Consulting Arborist@ # 651 ISA Certified Arborist® MA -4851A ISA Tree Risk Assessor Qualified aS.7RCA Registered Consulting Arborist® HEART`S OOD i;. NSt;L l NG ARRORISTS Page 4 of 4 matthew@heartwoodarborists.com — 650.542.8733 1/11/2019 CijyC: daps 10371 Leola Ct 10371 Leola Ct - Google Maps Imagery ©2019 Google, Map data @2019 Google 50 ft 10371 Leola Ct Cupertino, CA 95014 8X9Q+72 Cupertino, California https://www.google.r-om/maps/place/l 0371 +Leola+Ct,+Cupertino,+CA+95014/@37.3176973,-122.0129662,147m/data=! 3m 1 ! 1 e3!4m5! 3m4! 1 sOx808f... 1/2 1116/2019 10399 Leda Ct - Google Maps Go - €1 Naps 10399 Leola Ct 3 Image capture: Dec 2017 0 2019 Google Cupertino, California P-;, Google Street View - Dec 2017 To access the yard where the subject tree is located. Walk up the west driveway and walk westward on the sidewalk between the building of 10371 and 10369. Enter via the gate to your left and head south. Turn left at the end of the building and head eastward towards the gate dividing the two yards. Subject tree at the edge of the patio. Replacement tree will be determined by the Arborist and I would suggest any replacement tree should be located more towards the center of the yard. https:/twww.google.00mlmapsiplace/l 0371 +Leoia+Ct,+Cupertino,+CA+950141 x@37.3181539,-122.0123459,3a,75y,180h,90tldata=!3m7! 1 e 1 !3m5!1 s8... 1/1 1/29/2019 _iv, 10371 Leola Ct 10371 Leola Ct - Google Maps 10371 Leola Ct Cupertino, CA 95014 d * 8X9Q+72 Cupertino, California Imagery ©2019 Google, Map data @2019 Google 20 ft LOC-PtASlOel 0� P(Iev`1005 X new traa- � U c� td wte-�►c� 6� � b r) ko be T https://www.google.com/maps/place/10371 +Leola+Ct,+Cupertino,+CA+95014/@37.3178259,-122.0127244,61 m/data=!3m 1! 1 e3!4m5!3m4! 1 sOx8O8fb... 1/2 Gold medallion (Cassia leptophylla) 20-25 Yt rounded or umbrella