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Home My WebLink About12/05/2006, BUS 5 - REVISED STREET TREE STANDARDS council D� 12/5/06 a Enda nE ont. �N � = P mss CITY OF SAN LUIS OBISPO FROM: Jay Walter; Director of Public Work Prepared By: Todd Beights, Parks an Urban Forest Supervisor Barbara Lynch, City Engineer SUBJECT: REVISED STREET TREE STANDARDS CAO RECOMMENDATION As recommended by the Tree Committee, approve the revised Street Tree Master List and Street Trees Major Streets Engineering Standards. DISCUSSION Background The Tree Committee, as part of their work, periodically reviews and updates City Engineering Standards that relate to trees. Their focus is largely on the two master lists which identify appropriate trees for planting in the City's Right-of-Way as Street Trees. In 2004, with the assistance of the Public Works staff, they under took a review of the Street Trees Master list, Engineering Standard 8010, and the Street Trees for Major Streets list, Engineering Standard 8020. (See Attachment 1 & 2) These two standards specify the species of trees suitable and desirable for planting in certain areas in order to establish.a wide-ranging urban forest. The Master Street Tree list was last updated in 2003, the Trees for Major Streets list was last updated in 1995. All Engineering Standards are approved by the City Council for use. The Tree Committee worked on this project during many regular meetings as well as special workshop meetings. During the meetings and workshops, which were advertised to encourage the public to participate, the Committee used the Cal Poly tree selection web site to learn about tree characteristics including light and water needs, size and shape, susceptibility to pests, flowering, etc. Council members, the Downtown Association, and Tree Committee members all participated in a walking tour of the Downtown urban forest, led by the City Arborist. The tour highlighted some of the issues that trees in the Downtown face for survival, and the information led to the final recommendations on the list. The proposed changes were circulated to the Downtown Association and the Community Development Department. From this final review, some additional native trees were added to the list to be included in the Downtown District. Recommended Modifications and Downtown Impact Evaluation of the current tree lists led to a moderate number of proposed changes including the elimination of species that aggressively cause root damage to hardscape, create excess litter, are structurally unreliable, or generate high allergen levels. A total of nine species were removed from the master list with some additional updates to botanical names. The list of trees for major S—� l I � Revised Street Tree Standards Page Z streets received a more significant update. Two streets were added to the list, Margarita Avenue and Tank Farm Road, and several revisions made to the trees for the various streets. (See Attachment 3) The most notable change was to add the Downtown District as a"street" in lieu of listing trees by the individual street sections within the Downtown. This allows the Downtown to be looked at as a whole. The Committee also approved a list of accent trees for periodic use upon request by members of the community to introduce some color and variation. The primary trees recommended for the Downtown are as follows: Ficus macrocarpa Quercus agrifolia Platanus acerifolia `Bloodgood' Olea europaea—grafted fruitless These trees were selected in order to create greater species diversity in the Downtown forest, and because of certain desirable characteristics such as native species, large canopy, evergreen foliage, and potential for good growth in urban environments. . Selected accent trees that would be used are as follows: Jacaranda mimosifolia Robinia ambigua "Purple Robe" Magnolia grandiflora `Saint Mary's' Eucalyptus ficifolia Pyrus calleryana 'Arisocrat' Calodendrum capense Staff can provide pictures of these and other trees during the presentation by accessing the Cal Poly website. CONCURRENCES The Community Development Department and Downtown Association has reviewed and approved the revised street tree list. FISCAL IMPACT There is no fiscal impact associated with the approval of these standards. ALTERNATIVES ,�z Revised Street Tree Standards Page 3 The City Council could choose to revise the list or send it back to the Tree Committee for further work. Given the level of effort that has gone into the work to date, staff does not believe a better list will come out of further discussion of the list. ATTACHMENTS 1. Engineering Standard 8010 2. Engineering Standard 8020 3. Trees for Major Streets showing additions and deletions 4. New Trees Downtown g:\StaU-report agwdtl inutms mA2006"rks-trees\s#eet tree stds\2007sweestdsAa ALLOWABLE ZONES CHARACTERISTICS. 1 In park0my of trece well _ C=Fall Color D=Deciduous 2-3 to 7.5 feet from curb or sidewaBt if F=Flowering G= Suggested trees for Coinmeinorative Grove 3-7.5 to 10 feet from the curb or sidewalk if E=Eve"`een BOTANICAL NAME.. COMMON NAME :_:_ .CHARACTERISTICS .. HEIGHT WIDTH ZONE. flex-opaca American Holly - - E 1 50 40 2-3 Brach chicon acerifolius Australian Flame tree - - E F - 60 30 3 Geijera parviflora Australian Willow- - - E 30 20 1-3- Pyrus calleryana Aristocrat Flowering Pear D C F 40 20 13 Tristanio sis laurina Water Gum E F 45 25 2-3 Eriobotryadeflexa .Bronze lo-uat _ E F - 15 10 1-3 Melaleuca quinquenervia Ca'e ut tree - - E F 40 25 2-3 .Platanus racerni sa - California S cambre D I I G 80 50 3 Cinnamoinum cam liora Camphor Tree E 50 60 3 Pinus canariensis Canary Island Pine E 80 35 3 Calodendram capense Cape Chestnut D F 40 40 3 L onothamnus 0oribundus Catalina Ironwood E 35 15 1-3 Ulmus parvifolia Chinese Evergreen Elm E 60 60 2-3 Chionamhus-retusas Chinese Fringe _ _.D.. C- F - 20 20 13 Pistacia chinensis Chinese Pistache. D C- G 60 40 2-3 Quercus agrifolia Coast Live Oak E G 70 70 - 3 Euca] tus•tor uata _ _ CoralGumE F 36 30 1-3 Quercus suber Cork Oak - - E G 60 60 3 Metase uoia Ttostroboides _ Dawn Redwood D 90 20 3 Cedrus deodma DN6 dar Cedar E G 80 40 3 Cercis-canadensis -- Eastern Redbud D C F 35 .35 1 Sten6carpus sinuatus Firewheel Tree E F 30 15 1-3 Melaleucalinariifolia Flaxleaf Paperbark E -F 30 25 2-3 Koelreuteria paniculata Goldenrain Tree - D F G 35 40 2-3 Quercus ilex Holly Oak E 60 60 3 Gleditsia triacanthos inennis Honey Locust D. C 70 35 -I-3 Ficus microcarpa Indian Laurel Fig E 60- 70 3 Jacaranda mimosifolia Jacaranda D _ F 40- 30 2-3 La ersooemia faurei Japanese Crape Myrtle D. C F 30 1 30 1-3 Magnolia grandiflora"Little Gem' Little Gem Ma glia E. F25 15 1-3 Platanus acerifolia London Plane Tree D 80 40 2-3 Arbutus-marina Marina Madmne - - E. F C 40 40 1-3 Ginkgo biloba _ Maidenhair Tree - - D- C 50 30 1-3 Ma enusboaria. . - _ Ma ea Tree E 50 20 I-3 Meuosidemsexcelsus - - -New Zealand.Christ=Tree E' F 30 30 1-3 Bauhinia variegate - - - Purple Orchid Tree D F 35 35 2-3 Acer rubrurn - -- - Red Maple D C 60 40 1-3 Betula nigra River Birch D 90 60 3 Zelkova serrata Sawleaf Elm D C 60 60 2-3 Albizia'idibrissin Silk tree D F 40 40 2-3 Magnolia grandiflom - Southern Magnolia E F 80 . 60 3 Heteromeles-arbutifolia To on E F _ 25' 25 1-3 Pittosporum undulaium - Victorian Box E F 40 - 40 2-3 Cratacgus phaenoWashingtcn HawthornD C'. F - 25 20 1-3 Cercis occidentalis Western Redbud D C F 18 18 1-3 Trees not included on this list may be used only with prior approval by the City Arborist. REVISIONS BY APP DATE_ C Or Remove Sweet Gum BL- DW 11-05 ik LU�1 STREET TREES List update BL eL 1 os S MASTER LIST Add legend;Update JDL JDW 1-03 STANDARD CURRENT AS OR January 20D7 OBISPO 8010 AtuonlFAT z.. Note: Percentages refer to mixture of tree types in project area DOWNTOWN DISTRICT % GRAND AVENUE % MARSH STREET % Ficus microcarpa 40 Magnolia"Majestic Beauty" 50 Use Downtown District Quercus agrifolia 20 Platunus acerifola 50 Platanus agrifolia'Bloodgood' 30 MARGARITA AVENUE % Olea europaea—grafted fruitless HIGUERA STREET % Platanus acerifolia 33 10 California Blvd.to Downtown Sweetshade 33 District Pin oak 34 Downtown Accent Trees Ficus microcarpa 100 Jacaranda mimosifolia MONTEREY STREET % Robinia ambigua"Purple Robe" Downtown District to Madonna Rd. Use Downtown District Magnolia grand iflora'Saint Mary's' Use Downtown District Eucalyptus ficifolia ORCUTT ROAD % Pyrus calleryana'Arisocrat' Madonna Rd. to City Limit Pistachia chinensis 60 Calodendrum capense Pinus canariensis 30 Crataegus phaenopyrum 20 Monterey cypress" 30 Quercus agrifolia 20 BROAD STREET % Hymenosporum flavum 20 Monterey St.to Pacific St. Red Oak 20 At creek crossings Tristaniopsis laurina 60 Platanus racemosa 100 Pyrus calleryana"Aristocrat" 40 JOHNSON AVENUE % Hwy. 101 to SPRR underpass . P_RADO ROAD % Pack St.to High St. Magnolia"Majestic Beauty" 20 Platanus acerifolia 34 Platanus acerifolia 40 Pyrus calleryana"Aristocrat" 20 Pinus canariensis 33 Pistacia chinensis 40 Pistacia chinensis 20 Pin oak 33 Ginkgo biloba 20 Pin oak 20 Hymenosporum flavum 20 SANTA ROSA STREET % High St.to City Limits Highland St.to Murray St.. Platanus acerifolia 30 SPRR underpass to Laurel Lane Quercus agrifolia 80 Quercus palustris 20 Quercus agrifolia 20 Pistacia chinensis 20 Pistacia chinensis' 20 Pistacia chinensis 20 "Red oak" 15 Chinese Elm 20 Murray St.to Marsh St. Tristaniopsis laurina 15 Hymenosporum flavum 20 Pistacia shinensis 20 `Subsitute south of Orcutt: Red Oak 20 Pyrus calleryana"Aristocrat" 20 "Monterey cypress" 20 Ficus microcarpa 20 Laurel Lane to Orcutt Rd. Tristaniopsis laurina 10 At creek crossings Maytenus tioaria 20 Pistacia chinensis 20 Platanus racemosa 100 Red oak 20 Jacaranda mimosa 10 Chinese Elm 20 CALIFORNIA BLVD. % Jacaranda 20 At Creek intersections Cal Poly to Mill St. Hymenosporum flavum 20 Platanus raoemosa 100 Liguidambar styraciflua 25 Red oak 25 LAUREL LANE % SOUTH STREET % Camphor 30 Platanus acerifolia 50 Tristaniopsis laurina 20 Agonis flexuosa 20 Quercus suber 20 Jacaranda mimosifolia 20 Mill St.to San Luis Dr. Jacaranda 15 Gingko biloba 20 Pyrus calleryana"Aristocrat" 40 Gingko biloba 15 Platanus acerifolia 20 Agonis flexmosa 30 Pin oak 20 Metrosideros excelsus 30 LOS-OSOS VALLEY ROAD % San Luis.Dr._to.Joh_nson Ave. Tristaniopsis laurina 20 TANK FARM ROAD % Quercus agrifolia 60 Monterey cypress 20 fast of Broad St. Agonis flexuosa 40 European beech 20 Platanus acerifolia 50 At creek crossings Quercus agrifolia 20 Tristaniopsis laurina 20 Platanus racemosa 100 Pinus oaneriensis 20 Eucalyptus torquata 30 FOOTHILL BLVD. % MADONNA ROAD % West of Broad St. Magnolia"Majestic Beauty' 60 Pinus canarierisis 25 Platanus acerifolia 25 Pyrus calleryana"Aristocrat" 10 Pistacia chinensis 25 Cinnamornum camphora 25 Platanus acerifolia 30 Quercus agrifolia 25 Quercus agrifolia 25 At creek crossings Red Oak 25 Red oak 25 Platanus racemosa 100 REVISIONS BY APP DATE' �lulilliillllllllllcity 111111 Of Revise List BL WAP ¢95 pllllllll SAp STREET TREES Revise List e1 si 11-06 )JAIS MAJOR STREETS New Border JDL WAP 1-98 �+ STANDARD CURRENT AS OF: January 2007 OBISPO1 8020 s-s 4VT4ci4 M ENT 3 TREES FOR MAJOR STREETS Deletions are in stflkee, . Additions are in Itallics DOWNTOWN DISTRICT % FOOTHILL BLVD. % Ficus microcarpa 40 Magnolia grandiflere"Majestic Beauty" 60 Rinds sanariensis 39 Quemus"^* 29 Pyrus calleryana "Aristocrat" 10 Lephestenum rent ,s 29 Platanus acerifolia 30 Quercus agrifolia 20 At creek crossings Platanus acerifolia 'Bloodgood' 30 Platanus racemosa 100 Olea europaea—grafted fruitless 10 ACCENT—OCCASIONAL TREES: GRAND AVE. % Jacaranda mimosifolia Robinia ambigua "Purple Robe" Magnolia gFaadiflaFa Majestic Beauty" 50 Magnolia grandif/ora 'Saint Mary's' Platunus acerifola 50 Eucalyptus flcifolia Pyrus calleryana Arisocrat' Calodendrum capense HIGUERA ST. % California Blvd.to Downtown District Ficus microcarpa 100 BROAD ST. % Monterey St.to Pacific St. Downtown District to Madonna Rd. Tristaniopsis laurina 60 Use Downtown District Pyrus calleryana "Aristocrat" 40 12yFus"AOseeraF" 601 Pacific St.to High St. Qdersas ile* 49 6iquidambaF StYFAGif 111;3 20 Platanus acerifolia 40 Madonna Rd.to City Limit* Pistacia chinensis 40 Pinus canariensis 30 Ginkgo biloba 20 6igdidambaF 6tyrasif111a 29- High 9High St.to City Limits Platanus acerifolia 30 "Monterey cypress" 30 Quercus palustris PO Hymenosporum flavum 20 Pistacia chinensis* 20 Red Oak 20 "Red oak" 15 Tristaniopsis laurina 15 JOHNSON AVE. % *Subsitute south of Orcutt: "Monterey cypress" 20 Hwy. 101 to SPRR underpass At creek crossings WeluidambeF 6ty.rasiflaa 6A Platanus racemosa 100 Magnolia "Majestic Beauty 20 Pyrus calleryana Aristocrat" 20 Pistacia chinensis 20 CALIFORNIA BLVD. % Pin oak 20 Cal Poly to Mill St. Hymenosporum flavum 20 Quersds suber 190 Liguidambar styraciflua 25 SPRR underpass to Laurel Lane Red oak 25 Quercus ile*agrifolia 20 Camphor 30 Pistacia chinensis 20 Agonis flexuosa 20 Chinese Elm 20 Mill St.to San Luis Dr. Hymenosporum flavum 20 Pyrus calleryana"Aristocrat" 40 Red Oak 20 6iquidambar styrasiflda 29 Laurel Lane to Orcutt Rd. Agonis deros ex 30 Maytenus boaria 20 Mis Dr.to os Johnson us 30 6iquidambar styrasiflsa 69 San Luis Dr.to Johnson Ave. Quercus agrifolia 60 Red oak 20Chinese Elm 20 Agonis flexuosa 40 At creek crossings Jacaranda 20 Platanus racemosa 100 Hymenosporum flavum 20 A-7f C.4YK B7-iT 3 Trees for Major Streets — Page 2 Recommended List 9-27-06 LAUREL LANE _ _ _____ __-__ % ORCUTT RD. % Platanus acerifolia 50 Pistachia chinensis 60 Quercus agF+#e4ia suber 20 Crataegus phaenopyrum 20 Jacaranda 15 Quercus agrifolia 20 Gingko biloba 1.5 At creek crossings Platanus racemosa 100 LOS OSOS VALLEY RD. % PRADO RD. % Tristaniopsis laurina 20 Tristania senferta 68 Monterey cypress 20 Platanus acerifolia 34 Pinus canariensis 33 Finds mdrisata 74 Pin oak 33 lalatands aserifelia 43 Tristan-4a 43SANTA ROSA ST. European beech 20 Quercus agrifolia 20 Highland St.to Murray St. Pinus caneriensis 20 Rinds sanariensis 89 Ry us salleFYana 20 Quercus agrifolia 80 MADONNA RD. % Pistacia chinensis 20 Pinus canariensis 25 Murray St.to Marsh St.6igdidambar styrasifldPistacia shinensis 20 a 29 Pyrus calleryana `Aristocrat" 20 Pistacia chinensis 25 Ficus microcarpa 20 Quercus agrifolia 25 Tristaniopsis laurina 10 Red Oak 25 Pistacia chinensis 20 Jacaranda mimosa 10 MARSH ST % At Creek intersections Use Downtown District Platanus racemosa 100 AGUE MisrssarPa ROW;; 69 Quersds RPM Fi^ SOUTH ST. % Outside D8WRtOWA Tristaniopsis laurina 20 40 edersds ilei 20 Jacaranda mimosifolia 20 tis saller�;ana 29 Gingko biloba 20 Metresideres tementesas F9 Plaa salla}grana �p Plattanus acerifolia 20 Pin oak 20 MARGARITA AVE. - % Platanus acerifolia 33 TANK FARM RD. Sweetshade 33 East of Broad St_ Pin oak Platanus acerifolia 50 Tristaniopsis laurina 20 MONTEREY ST. Eucalyptus torquata 30 Use Downtown District West of Broad St. Platanus acerifolia 25 AGUE FRisresarpa nidda 00 Cinnamomum camphora 25 Quercus agrifolia 25 Fieds Misresarpa nitida 98 Red oak 25 PyFus kawakamii 19 • :a- fl�l • IN • i ``3 '\ rCF t - 1;.. LI I IS 1 44 r. -L • tqr�•�\ T✓1�1 A:;?y«4C+ ^y .+' � i ��t.s.i. \1 WV r '� , a F� KY•y.i t ; rNay �'� ♦ C' _1r ti•Cr{ ,,,\ r. ' �,� -. tr .ti tl.. �tye •N•. ' F`rYme ,• r. �, i....wY� fit.\ --•iff4.� � pi' 'J J.r� i { 7'• /IN - I' '��4�1a,i , f � 'I 11 .1 � Mlr• ��11'. 4 L. -.l�1II f-''�, I -� All src�\r•S* ..-'qfk.�. . , ` F-' �.iJ r � 'G�' Y 'a'�t� 6 • Y',��r� �rt� ,s ri , J "� i �yfN, Y ;� t'Yy/fi i. rt`,.t�J,� .* l� 1=� -• j;`1':-if ';�i .I ;'ice' ! I • �� r \ ' r ,h;\I' �. ;v -� c� — 'a Sri-�J"''M —?- )�� 1 • _ _ !�\•. i -� �r J :.rte P rL.V: � ti r. � - +s .+8 .'. CIIr^`t ") i �7• \1� 9^ ��i K\ � � r a\ t. 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