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TR-2010-18b OFFICE OF COMN UNITY DEVELOPMENT CITY HALL 10300 TORRE AVE NUE • CUPERTINO, CA 95014-3255 C U P E RT 1 N O (408) 777-3308 • Fi�X (408) 777-3333 • planninqCa�cupertino.org July 19, 2010 Community Management Services, Inc. Attn: Robert Schwartzer 1935 Dry Creek Road, Suite 203 Campbell, Ca. 95008 SUBJECT: TREE REMOVAL PERMIT A:�TION LETTER - Application TR -2010-18: This letter confirms the decision of tr e Director of Community Development, given on July 19, 2010, approving a tree removal permit to remove and replace one (1) 22.6" Ash tree at the Silver Oak We�t condominium complex, located at 22665 & 22667 Silver Oak Way, with the follo��ing conditions: 1. APPROVED PROTECT The approval is based on the A:-borist report prepared by Deborah Ellis, MS, ISA Certified Master Arborist #WE-0457B, dated March 1, 2010 (this report is available upon request) pertaining to the Ash tree located 22665 & 22667 Silver Oak Way, except a� may be amended by conditions in this resolution. 2. TREE REPLACEMENTS The applicant shall be required to plant one (1) 24-inch box size Chinese Pistache or Tristania on the property and pay an in-lieu fee for one (1) 24- inch box tree in accordance with the City's Protected Trees Ordinance. The required replacement trees shall be planted within 15 days of the effective approval date of this tree remova] permit. 3. NOTICE OF FEES, DEDICA'I'IONS, RESERVATIONS OR OTHER EXACTIONS The Conditions of Project Appr��val set forth herein may include certain fees, dedication requirements, reservation requirements, and other exactions. Pursuant to Gover�unent Code Section 66020(d) (1), these Conditions constitute written no tice of a statement of the amount of such fees, and a description of the dedications, reservations, and other exactions. You are hereby further notified :hat the 90-day approval period in which you may protest these fees, dedications, reservations, and other exactions, pursuant to Government Code �ection 66020(a), has begun. If you fail to TR-2010-18 22665 & 22667 Silver Oak Way Page 2 file a protest within this 90-c ay period complying with all of the requirements of Section 66020, you will be legally barred from later challenging such exactions. Staff has made the findings necessary to grant the tree removal permit in accordance with Section 14.18.180 of the Protected Trees Ordinance. Sincerely, - v= . .'-"..� ._----'._!' � Piu Ghosh l Associate Planner CC: Silver Oak West HOA,1935 Dry Creek Rd #203, � ampbell CA 95008 � n/ � ' r � Deborah Ellis, MS AP�ROV�! �,� .��___--- A�'�� r"-` '°''~`jt Consulting Arborist 8� Horticulturist �...�_. � - lo. �__ . .W_.�.. k. , ;. �.�—� v? �''i+.','�i-!�'� ,S'ervice since 198-1 ,,, � .. __ i�.�,c��..:y•:,r �� Ever rE�en ash tree, 22665/2266:� Silver Qak Way, Cupertii�o, California Pr�apared for: Robert Schwartzer Community Ma��agement Services, Inc. 1935 Dry Creek Road Camp �ell, CA 95008 Pr�apared by: Deb<>rah Ellis, MS. Consulting Arborisf & Horticulfurist Registered Consulting Arborist #3()5, American Society of Consulting Arborists Board Certified Master Arborist WE-0457B, International Society of Arboriculture Certified Professional Horticulturist #3(�022, American Society for Horticultural Science \ MARCH 1, 2010 OThis report may be reproduced in whole or in part by or�ly the client and the ciient's authorized representatives and only for use with the subject project and/or property. All other re�xoduction requires the expressed written or verbal consent of Deborah Ellis prior to reproduction. PO Box 3714, Saratoga, CA 95070. 408-7?5-1357. decahC�pacbell.net. http://www.decnh.com. Arborist Report - Evergreen Ash Tree u� 22665 and 22667 Silver Onks Lnne. March 1, 2010. Puge 1 of 10 Deborah Ellis, MS Consulting Arborist & Horticulturist ,Service since 1984 TREE MAP �, � ` ,, •. � �ub,�act ash tr�� PO Box 3714, Sarntoga, CA 95070. 408-7� 5-1357, decahC�pacbell.net. http://www.decah.com. Arborist Report - Evergreen Ash Tree at 22665 and 22667 Silver Oaks Lane. March 1, 2010. f'nge 2 of 10 Deborah Ellis, MS Consuiting Arborist � Horticulturist .Seriice sittce 1984 SUMMARY & RECOMMENDATIONS Roger Schwartzer of Community Managemen r Services asked me to evaluate an evergreen ash tree at the Silver Oaks West condominium corriplex. I evaluated this tree on February 26, 2010. The tree has good vigor but poor branch structure More importantly however, Roger informed me that the roots of this tree have repeatedly damage d the asphalt driveways on both sides of the tree. The roots have also broken underground utility line � that run through the planter in which the tree is located. There have also been leaks in water pipes that run near the tree. Within the past two years both driveways on either side of the tree have been replaced twice due to tree root damage from the subject ash tree. Root barriers were installE;d after at least one of the driveway replacements, but the tree roots have grown over the barrier to damage the pavement again. Despite all good efforts, the tree will ' most likely continue to damage nearby hardscape and underground utilities. Evergreen ash trees are large- �� , growing trees with aggressive root � �`"�: systems. This tree is planted in a � relatively small planting area for its expected size. Due to the large �' ��" amount of damage that this tree � has caused and the difficulty and '� " � impracticalness of preventing future root damage, I recommend �°� ` `� that the tree be removed. Another °�` - tree species of a smaller stature and with a less aggressive root system ;�? should be replanted in its place. The �. existing root barrier should be �� removed and replaced with a new �� linear root barrier that is properly installed and maintained. � : �.::, � � ��., � �� i:,�� , _ ��'. �.. � r The photo at right shows the sub ject evergreen nsh tree between 22665 sand 22667 Silver Oak Lane from the south. PO Box 3714, Saratogn, CA 95070. 408-7:'_5-1357. decah@pacbell.net. http://www.decnh.com. Arborist Report - Evergreen Ash Tree ni 22665 and 22667 Silver Oaks Lane. Mnrch 1, 2010. 'age 3 of 10 Deborah Eilis, MS Consuiting Arborist � Horticulturist ,Service sirzce 198•f . ? � �� , y . ��. .. ., , , :: , :.u. � i L 3 .. k , .w" „ Ya � ��:� �� .:. �"�' ?,'�k. �'��'�' .. . �, r;.� ; `i - u �� .• ff_ 's ��oa�X� �: � � :i 4;g�, dsz . .., �.� �. �r.�_�i ae&u..� . �w. �. '#fi� b` .$� � . . �� k � q x. �� i �-.. ^s �r� r ��.� �,�� z•�:. ':� �� '�,� �"� a. - ..��.��q�`� ��.i� � �`� r�� ' :�'��"'.:_,. ��s '�'r �g,� ��a � � ;��: ,a . _ _-,� , � � � . � � �:•. � s' p "'�"s The photo above shows the planting nrea, in wh ch the sub ject ash tree is locoted, and the lower trunk of the tree. The tall wooden box structure ho�ses an irrigation controller. Two water meter boxes are ulong the curb. An irrigation valve box is between the water meter box and the irrigation controller box. An electric vault is to the right of the irri �ation vnlve box. PO Box 3714, Saratoga, CA 95070. 408-7�!5-1357. decah@pacbell.net, http://www.decah.com. Arborist Report - Evergreen Ash Tree ai 22665 and 22667 Silver Oaks l.ane. March 1, 2010. I'age 4 of 10 Deborah Ellis, MS Consulting Arborist 8� Horticulturist ,Service since 1989 OBSERVATIONS Tree Data: Scientific name: Fraxinus uhdei Common Name: evergreen ash, Shamel ash Trunk DBH (diamefier at 4.5 feet above the groun�J: 22.6 inches Size (height x canopy spread in feet, estimated): �0 x 30 Condition � • Vigor:80 • Structure:50 Preservation Suitability: Poor Action: Remove Reason: Wrong tree species planted in the w�ong place! Mitigation Recommendations: If another tree will be planted in this location, make it a species that is smaller stature than evergreen ash, and also with a less aggressive root system. There are many crape myrtle trees (Lagerstroemia indica) plcinted in similar front yard locations along the south portion of Silver Oak Lane. Crape myrtles ho�nrever, are drought tolerant trees that should not really be planted in frequently irrigated landscape areas such as lawns. Instead I suggest a tree species that is more tolerant of frequent irrigcition and lawn conditions, such as goldenrain tree, Koelreuteria paniculata. This is a deciduous iree species that will allow more light to the front yard and house during the winter while it is leafles� , and will provide shade during the summer when it is in leaf. Notes: The ash tree appears to have good ��igor based upon foliage color and density at this time of year. Right now it is parfially deciduous ar�d its new spring leaves are beginning to grow. The tree has a very dense cluster of multiple brarch afitachments This is a common structural defect in evergreen ash, due to their normal brancring pattern. In this particular tree however, the multiple attachments are quite dense and ciowded, which I believe increases the chance of a large branch failure in the future. In addition, the tree was topped in the past, with the topping cuts made very close to the trunk. � Condition 8� Preservation Suitability Ratinqs: Trees c�re rated for Condition on a scale of zero to 100 with zero being a dead tree and 100 being the most perfect tree imaginable (which rarely exists). Using this scale, 100 = excellent, 80 = good, 60 = fair, 40 = poor, and 20 =��nacceptable. There are two components of tree condition - Vigor and Structure. Each of these components i� rated separately and then considered relative to the tree species and use of the site to obtain the Preservatic n Suitability Rating (i.e. "Is this tree worth keeping on this site, in this location?"). 2 Multiple trunk (leadersl or branch attachments arE� a common structural defect in many tree species such as ash and flowering pear. In this condition, more tha � one branch or trunk originates at or very close to the same point. These attachments are not as strong as well-�paced branches or trunks, particularly if included bark between them prevents a solid wood connection. This structural defect can be eliminated or at least reduced in significance by thinning removal of some of the r�ultiple attachments when the tree is very young (this defect is large, it is much more difficult to correct. 3 Toppina is the practice of indiscriminately cutting �ack large diameter branches of a mature tree to some predetermined lower height; to reduce the overall �eight of the tree. Each individual cut is called a heading cut, and when most or the entire tree canopy is pr� ned in this method this is called topping the tree. Heading cuts are cuts made to buds, stubs or lateral branch �s not lar e enou h to assume the terminal role at least 1/3 PO Box 3714, Saratoga, CA 95070. 408-7�:5-1357, decahC�pacbell.net, http://www.decah.com. Arborist Report - Evergreen Ash Tree ai 22665 and 22667 Silver Oaks Lane. March 1, 2010. >age 5 of 10 Deborah Ellis, MS Consulting Arborist S Horticulturist ,Service siiace 1984 a.: i�;a �'��+ii�� g � ' ,,:'�s� 0 �.4� 3� s �E S` u a. fx � ' < � ��; i � :'F .. 9 � i �. `tl m � '' ;> y � .,- � I � I I �� , �;� � Gi !��'�' f i� I I �� The photo nbove shows the trunk and lower portion of the scaffolaa nnd lesser branches of the tree. Note the crowded multiple attachments of brc�nches. Arrows point to past topping cuts. the diameter of the branch portion being cut off). 2eputable arborists no longer recommend topping because it is a particularly destructive pruning practice. Top �ing is stressful to mature trees and may result in reduced vigor, decline and even death. In addition, brancr es that regrow from topping cuts are weakly attached to the tree and are in danger of splitting out. Large tcpping cuts may have significant decay associated with them, which weakens the branch as well as the att �chment of any secondary branches attached nearby. Topping is useful however, for immediately reducinc� the risk of a very hazardous tree that will soon be removed. 4 Scaffold branch: a primary structural branch arisirg from the trunk of a tree. Usually the largest and often the lowest branches of the tree. PO Box 3714, Snratoga, CA 95070. 408-7�:5-1357. decahC�pacbell.net, http://www.decah.com. Arborist Report - Evergreen Ash Tree ai 22665 and 22667 Silver Oaks Lane. Mnrch 1, 2010. 'nge b of 10 Deborah Eilis, MS Gonsulting Arborist 8� Horticulturist ,Servue since 1984 � ��. � � � � ��.. � � _. � These photos show dmm�ge to pnverr►ent cnusE:d by the roots of the sub ject ash tr¢e. The u�per hoto shows (ifting nnd sloping of the asphalt dr iveway at 22667 Siiver Oaks Lane. I have outlined the lifted driveway because it is difficult to see in ihe photo. The nrrows point from high (raised portion of drivewny) to low (unaffected portion of drivewuy). The irrigation controller box is at right. The lower photo shows a close-up of the irrigation amtroller box. Arrows point to cracks in the bottom concrete slab, probably caused by the roots of '�he ash tree. � � � ,; , PO Box 3714, Saratoga, CA 95070. 408-7�'5-1357. decah@pacbell.net. http://www.decnh.com. Arborist Report - Evergreen Ash Tree ai 22665 and 22667 Silver Onks Lane. March 1, 2010. 'age 7 of 10 Deborah Eliis, MS Consulting Arborist 8 Horticulturist ,Service si�ace 198�1 �� ° �G��1�. �; �� These photos show dnmage to the drivewny a•r 22665 Silver Onks Lane. The driveway is sloped down from the pinnting area and cracked from the roots of this tree. Arrows point to some of the crncks. The lower photo shows a close-up of th�: linear plastic root bnrrier along the inside of the planting area. Note how the barrier is lifted, br oken and there are roots growing over it. The arrow points to a set of keys, used for scale. The top of root barriers must remain exposed above the top of the soil or roots will grow over the bnrrier to dcmnge pnvement beyond. PO Box 3714, Saratoga, CA 95070. 408-7�:5-1357. decah@pncbell.net, http://www.decah.com. Arborist Report - Evergreen Ash Tree ni 22665 and 22667 Silver Oaks Lane. March i, 2010. I �age 8 of 10 Deborah Eilis, MS Consulting Arborist � Horticulturist .Seriice since 1984 �,.. � � � r.� � � ; - �S.x. x �< � � � �� I �r.�'�� y��il : a ..�� ,� . . ��I _ � � < ?' M : H , � � y , � . . � _. . _..m� _._ _ _� �.,... � . �.�'�� . . .. ; ro�� ,� �., � �� These photos show additional root damnge nt 22665 Silver Onks Lone, including damnge to the farthest edge of the driveway (lower photo) wh ch is 20 feet from the trunk of the tree. � ��, _ �,, _ ,,,... . � PO Box 3714, Saratoga, CA 95070. 408-7�:5-1357. decah@pacbell.net. http://www.decah.com. Arborist Report - Evergreen Ash Tree ai 22665 and 22667 Silver Oaks Lane. March 1, 2010. I'age 9 ot 10 Deborah Ellis, MS Consulting Arborist 8 Horticulturist ,Service since 198� ****�**�*��*******�***��*** I certify that the information contained in this r�;port is correct to the best of my knowledge, and that this report was prepared in good faith. Thank you for the opportunity to provide service. Please call me if you have questions or if I can be of furthE�r assistance. Sincerely, �De6oraFi Elr'�.s Deborah Ellis, MS. Consulting Arborist 8� Horticulturist Certified Professional Horticutturist #30022 ASCA Registered Consulting Arborist #305 I.S.A. Board-Certified Master Arborist WE-457E� PO Box 3714, Saratoga, CA 9507Q. 408-7�:5-1357. decnh@pacbell.net. http://www.decah.com. � Arborist Report - Evergreen Ash Tree ai 22665 nnd 22667 Silver Oaks Lane. March 1, 2010. Fage t0of 10