Powerline Friendly Trees - Reference Guide for Cities and Towns in Non-Bushfire Risk Areas 11 September 2018 - LGA SA
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Powerline Friendly Trees SA Power Networks Reference Guide for Cities and Towns in Non-Bushfire Risk Areas 11 September 2018 Powerline Friendly Trees | SA Power Networks
Contents Acknowledgements 3 Purpose of this Guide 4 Managing Trees Under Powerlines 6 The Importance of Trees 8 Other Considerations for Tree Planting 9 Process of Selecting Trees 10 Climate Zones 11 Criteria for Selecting Trees to Plant Under Powerlines 13 Selecting Species for Your Planting Area 14 My-Zone Look-up Table 15 Further Information 20 My-Zone Trees Appendix A Powerline Friendly Trees | SA Power Networks 2
Acknowledgements Constructive input was provided during the development of this Guide by members and representatives of: Office of the Technical Regulator, SA Power Networks, SA Power Network’s Arborist Reference Group, the LGA Working Group, nursery industry, and local Councils. Unless otherwise noted, photos used in this guide were provided by SA Power Networks. This Guide should be cited as follows: Seed Consulting Services (2018) Powerline Friendly Trees: Reference Guide for Cities and Towns in Non-Bushfire Risk Areas. Prepared on behalf of SA Power Networks. South Australia. 3
Purpose of this Guide Trees planted beneath powerlines One option for reducing or avoiding the impacts of tree trimming is to ensure tree species planted under powerlines are can create unnecessary, ongoing appropriate for the location. The current “appropriate” species maintenance work. SA Power lists (List 1 and List 2) approved by the Office of the Technical Regulator are large and inflexible, limiting the addition or Networks is seeking to find a way removal of species as relevant (e.g. new cultivars developed, new weedy classifications). The existing Lists also do not of balancing their compliance consider species suitable for growing in the different climate with legislated tree clearances zones within the State. and community expectations This Guide has been developed to help streamline the selection of tree species suitable for planting under powerlines in the regarding aesthetic and non-bushfire risk cities and towns within the State’s different climate zones. Other plant forms (e.g. shrubs, grasses and environmental considerations. ground covers) are not considered in this Guide but are included in the existing List 1 and List 2. At the discretion of Council and private land managers are considerations of other constraints that may impact species selections, such as RIGHT TREE, RIGHT PLACE! underground utilities, infrastructure, and climate change. CREATE A BENEFICIAL The My-Zone Tree Species list in this Guide is not intended to replace the existing List 1 and List 2, but rather to be used as a LEGACY, NOT AN “rapid reference” for local Councils and private land managers ONEROUS ONE of trees that will help minimise maintenance costs (through reduced trimming needs), improve visual amenity and benefits provided, and grow well in specific climate zones. Other trees and plants on List 1 and List 2 may still be selected if desired, and additional species not on any of the lists may be submitted to SA Power Networks and considered for approval if they meet species requirements. Further, the tree species list in this Guide is not intended to be static, rather to be flexible and evolving. Proposed legislative changes include the removal of List 1 and List 2 from the legislation to enable the list to be more dynamic as new knowledge is acquired (Figure 1) 4 Powerline Friendly Trees | SA Power Networks
(a) Current Situation: The Powerline-friendly trees list in this Guide is intended to operate in parallel to Lists 1 and 2, acting as a rapid-reference Lists 1 and 2 sit within legislation. Characteristics of the Lists guide to preferred trees for planting under powerlines in 1 and 2 are: inflexible (more difficult to add/remove species); non-bushfire risk areas. It does not replace List 1 or List 2. includes trees and shrubs; very large lists; climate zones not Characteristics of Powerline-friendly trees list are: flexible considered; maintenance not considered; for bushfire and (more readily able to add/remove species); trees only included; non-bushfire risk areas. shorter list; climate zone considered; focus on species with low/no pruning needs; non-bushfire risk areas only. LEGISLATION OTR APPROVED OTR APPROVED List 1 List 2 (Trees, shrubs) (Trees, shrubs) Powerline Friendly Trees (this Guide) (Trees only) Approved species for planting under powerlines (b) Desired outcome from 2021 legislative review: Powerline-friendly species lists that sit outside of the legislation and provides greater flexibility and specifically consider climate zones and maintenance requirements. LEGISLATION Note: a plant approved Approved species for planting OTR APPROVED LIST under powerlines by OTR 5 Powerline Friendly Trees | SA Power Networks
Managing Trees Under Powerlines One of the major challenges of There is a legislative requirement for SA Power Networks to inspect and manage trees under powerlines to minimise growing trees in the urban risk to life and property and maintain safe power supply. landscape is the competition for Appropriate management of trees involves ensuring specific clearance zones between the tree crown and the lines. space with infrastructure such Greater clearances are required in bushfire risk areas and as service utilities, including under high voltage lines. overhead powerlines. SA Power Networks manage more than 71,000km of overhead powerlines servicing approximately 840,000 residential and business customers across South Australia. Each year, SA Power Networks spend considerable resources inspecting and trimming vegetation under powerlines to meet safety and legislative requirements. The current clearance requirements, however do not account for visual amenity or tree balance and long-term health, resulting in many trees in urban areas being trimmed in a manner that creates unsightly canopies which may decline in health, and subsequently limit benefits able to be provided by trees (e.g. shading and cooling, biodiversity, air pollution filtering). Management of vegetation clearance under powerlines is imposed under the Electricity Act 1996 and the Electricity (Principles of Vegetation Clearance) Regulations 2010. Clearance zones consider movement of the trees and the growth and regrowth rates of the trees during the cyclic cutting interval, which is a risk-based approach (1-3 year cycle) in bushfire risk areas, and once every 3 years in non-bushfire risk areas. 6 Powerline Friendly Trees | SA Power Networks
Much of this trimming works is required due to a legacy of planting species under powerlines that grow to an inappropriate height at maturity, resulting in conflicts with SA POWER NETWORKS powerlines. For further information on the vegetation clearance requirements, refer to SA Power Network’s Protocol for HAVE A COMMITMENT TO Vegetation Management Neat Powerlines 2016-2018. IMPROVING VEGETATION SA Power Networks have a commitment to improving vegetation management and working more collaboratively MANAGEMENT AND with local Councils as well as building awareness and positive relationships with community members. For example, as part WORKING MORE of their commitment, SA Power Networks have been running COLLABORATIVELY WITH growth regulator trials to investigate approaches for reducing crown-powerline conflicts without the need for unsightly LOCAL COUNCILS AS WELL and potentially damaging trimming. Revisions to the current legislation and guidance for selecting the right tree species for AS BUILDING AWARENESS planting under powerlines is also part of the commitment to AND POSITIVE better vegetation management. In addition, SA Power Networks have created Trev the Tree RELATIONSHIPS WITH and Stan the Stobie – animated characters who represent COMMUNITY MEMBERS. trees and powerlines and are used to engage and educate the community about the importance of bushfire safety, vegetation management and appropriate species selection under powerlines. For example, an animated short film stars Trev, who co-exists in harmony with his friend Stan, and tells the story about caring for Trev and his mates under powerlines. 7 Powerline Friendly Trees | SA Power Networks
The Importance of Trees Trees are an integral part of our cities and towns. They provide human safety and uninterrupted utility services. The resolution an immense range of environmental, social, and economic can often be pruning (at times unsightly) or complete tree benefits and can create a sense of place - a link to our present, removal and can result in a negative perception and fear past and future. Many of the benefits provided by trees increase about trees which can further compound the challenge of as they mature, and are reliant on a healthy, full crown. maintaining large, healthy trees in urban areas. Given the However, in urban environments, there is often competition many benefits provided by trees though, there are mechanisms for space between trees and built infrastructure and facilities, imposed which aim to retain trees in urban spaces, whilst often creating challenges which need to be resolved to ensure minimising challenges and alleviating community concerns. Some of the environmental, social, and economic benefits provided by trees. Carbon capture Clean & manage & storage stormwater Increase Energy Clean air property values savings Look good Reduce crime Improve physical Produce Shade Enhance health oxygen biodiversity Provide food Improve Wind breaks mental Enhance local health Sense of business place 8 Powerline Friendly Trees | SA Power Networks
Other Considerations for Tree Planting This Guide focuses on a selection of tree species that are TREES ARE DEFINED HEREIN preferred for planting under powerlines as they minimise pruning maintenance. However, it should be noted that all AS: WOODY VEGETATION trees planted under powerlines may be subject to pruning for REACHING A MATURE various reasons. As well as pruning requirements, a range of other constraints in urban areas should also influence species HEIGHT OF AT LEAST 3M selections. For example: • Proximity to other utilities and infrastructure (e.g. sewer; footpaths); • Climate and soil type; • Weather conditions (e.g. coastal salt spray, wind intensity, annual rainfall, temperature); • Growth form (e.g. narrow upright forms that maintain line-of-sight along roads); • Visual amenity; • Community conflict (e.g. allergies); • Biodiversity value/resources; • Weed / invasive potential; • Resilience to climate change (e.g. increased species diversity, and consideration of pest/disease impacts); and • Maintenance requirements (e.g. watering and pruning) and cost-benefit of plantings. Councils may additionally have their own preferred tree species planting lists which may include species not shown in this Guide. Plantings of tree species not in this Guide or on the existing SAPN List 1 or List 2, should consider the primary and secondary criteria outlined in this Guide. 9 Powerline Friendly Trees | SA Power Networks
Process of Selecting Trees The trees listed in this Guide Six workshops were conducted in mid-2018 across the State with a focus on representing each of were selected following a desktop the key climate zones: review of existing relevant 1. Campbelltown (stakeholder workshop) 2. Mt Barker (council workshop, mild temperate and coastal) literature and documents, and a 3. Glenunga (council workshop, metropolitan) series of consultation workshops 4. Clare (council workshop, warm temperate) conducted with representatives 5. Port Augusta (council workshop, arid) from SA Power Networks, 6. Naracoorte (council workshop, mild temperate) Workshops focused on identifying key barriers to selecting Office of the Technical Regulator, and growing suitable species, and key criteria for selecting the nursery industry, SA Power the “top 10-20” trees. Innovative ways to positively Networks’ arborist reference engage and educate the community about tree benefits and powerlines considerations were also discussed. group, the LGA working group, and Local Councils. 10 Powerline Friendly Trees | SA Power Networks
Climate Zones All 68 local government areas These local government areas were classified into five broad zones, referred to here as “climate zones”. Climate zones will contain non-bushfire risk areas, be important for influencing the growth rate and condition of as defined by SA Power Networks species as well as the maintenance required. Three of the zones are true climate zones as defined by the Bureau of Meteorology and refined by CSIRO’s Australian Water Availability Project (Table 1). An additional two zones not recognized as formal climate zones were included given the contrasting growing conditions in these areas (Table 1): AN ECOTONE IS A 1. mild temperate (distinctly dry and warm summer); TRANSITIONAL AREA 2. warm temperate (distinctly dry and hot summer); and BETWEEN TWO ECOSYSTEM 3. arid (warm to hot, summer droughts to persistently dry); 4. metropolitan (highly urbanised regions as defined by the TYPES. THE TERM CLIMATIC Local Government Association of South Australia); and ECOTONE IS USED HERE TO 5. coastal (any area along a defined oceanic coastline). It should be noted that some Council areas contain more DESCRIBE THE MEETING than one climate zone, and some share a climatic ecotone AND INTEGRATION OF TWO with a climate zone not mapped as occurring within the Council boundary. Given that climate zones may vary in CLIMATE ZONES. ECOTONES response to climate change, local Councils should consult MAY SHIFT IN RESPONSE TO climate projections outlined in their Regional Climate Change Adaptation Plan and identify whether their region is predicted A CHANGING CLIMATE. to change significantly in the future and select tree species for long-term planting programs accordingly. Climatie changes are likely to be most apparent at current climatic ecotones. Accordingly, shared climatic ecotones have also been identified for each Council area, as trees suitable in one climate zone may also do well in a neighbouring climate zone, particularly in areas near the ecotone (Table 1). 11 Powerline Friendly Trees | SA Power Networks
Table 1. Local Councils within non-bushfire risk areas and their corresponding climate zone/s. Metropolitan Councils are those identified by the Local Government Association of South Australia. Climate zones allocated for each Council area are based on information derived from the Bureau of Meteorology and the Australian Water Availability Project. Note that some Councils cover more than one climate zone. A star in a cell indicates that the Council area shares an ecotone with the indicated climate zone/s. This acknowledges that climatic conditions may be particularly dynamic at climate zone boundaries, and tree species identified as suitable for one climate zone may also do well in other climate zones along a shared climatic ecotone. A A RE RE TE TE LA LA E E RA RA W TAL RAT W TAL AT CO TEM AN CO EM N CI CI T TA PE PE R T UN UN E AS PE ILD OLI I ID EM ID EM AS P ILD OL CO CO AR M T AR M T P P RO RO L L CA CA AR AR ET ET LO LO M M M M Adelaide Mount Gambier Adelaide Hills Mount Remarkable Adelaide Plains Murray Bridge Alexandrina Naracoorte Lucindale Barossa Northern Areas Barunga West Norwood Payneham St Peters Berri Barmera Onkaparinga Burnside Orroroo Carrieton Campbelltown Peterborough Ceduna Playford Charles Sturt Port Adelaide Enfield Clare & Gilbert Valleys Port Augusta Cleve Port Lincoln Coober Pedy Port Pirie Coorong Prospect Copper Coast Renmark Paringa Elliston Robe Flinders Ranges Roxby Downs Franklin Harbour Salisbury Gawler Southern Mallee Goyder Streaky Bay Grant Tatiara Holdfast Bay Tea Tree Gully Kangaroo Island Tumby Bay Karoonda East Murray Unley Kimba Victor Harbor Kingston Wakefield Light Walkerville Lower Eyre Peninsula Wattle Range Loxton Waikerie West Torrens Marion Whyalla Mid Murray Wudinna Mitcham Yankalilla Mount Barker Yorke Peninsula 12 Powerline Friendly Trees | SA Power Networks
Criteria for Selecting Trees to Plant Under Powerlines 1.1 Primary considerations 1.2 S econdary considerations Primary considerations in identifying powerline-friendly Secondary considerations in identifying powerline-friendly trees relate specifically to under powerline planting trees relate to other aspects that should be considered suitability and context-specific issues, specifically: when planting trees. These considerations are not specific • Low or high voltage lines – influences height of to planting under powerlines, but rather will apply generally tree that can be planted; and for tree plantings in any location within a local Council area: • Management limitations (e.g. resourcing, • Climate zone – influences growth rate, resilience, experience, frequency). and height of tree • Local location – influences soil type, extreme conditions (e.g. wind, salt, heat, frost) • Other utilities (underground water mains); • Other infrastructure e.g. footpaths, roads, buildings; • Resilience through species diversity – Santamour diversity planting guidelines (30% family, 20% genus, 10% species); and • Aesthetics and other benefits (e.g. biodiversity). 13 Powerline Friendly Trees | SA Power Networks
Selecting Species for Your Planting Area The following assumes you are trying to select a tree species that is suitable for planting under powerlines in a non-bushfire risk region of the State. 1 Based on your local Council area, 4 2 identify which climate zone your planting area falls within (see Table 1) Refer to the My-Zone look-up table Before planting species, consider any (Table 2) to find tree species 3 other relevant constraints for your planting area (e.g. underground recommended for your climate zone; utilities, nearby infrastructure, a. Consider how the Sewerage Act Council species diversity, limitations and other notes relate maintenance requirements). to your proposed planting area; Refer to the pictorial reference in the My-Zone species lists for further information about your species (species are listed alphabetically by scientific name) N.B. Species in the My Zone look-up table are not intended to replace the species in the existing SA Power Networks’ List 1 and List 2. Species from List 1 and List 2 may still be selected for planting under powerlines, though may require more trimming and management and will need local knowledge about the suitability of these plants for growing in different climate zones. All species selections, whether from the existing Lists 1 and 2, or the My Zone look-up table in this Guide should occur in the context of primary and secondary considerations, as well as other Council objectives and constraints. 14 Powerline Friendly Trees | SA Power Networks
My-Zone Look-up Table The “My-Zone” look-up table provides a rapid reference of • Sewerage Act indicates limitations regarding whether the 69 species that are considered suitable for planting under species has been listed in Regulations under the Sewerage powerlines, with minimal pruning requirements, in each of the Act and provisionally classified under Schedule 2. High level different climate zones. Of the 69 species, each climate zone indication of the specific limitations are provided, either: has between 14-39 species identified as suitable for planting minimum planting distance to sewer main or connection based on climatic features of the region and species tolerances (i.e. more than 2m or more than 3.5m) and/or requirements and requirements. The species in the My-Zone look-up table for written approval from SA Water for street or road include species currently in the SA Power Networks’ Lists 1 and plantings; and 2, as well as new species not currently formally listed. • Existing List indicates if the species is currently listed on List 1 or List 2. If no List number is provided, the Other information provided for each species in the species is not currently formally listed; and My-Zone look-up table is: • Other notes include specific considerations that should • Expected height (max.) at maturity, noting that the maximum be considered if selecting the species for planting height may vary between climate zones as well as relative to (e.g. weedy potential). the planting locations (e.g. street verge versus park). Species A pictorial reference guide for species listed in the My-Zone with an expected height of greater than 6m may not be look-up table is provided in the My-Zone Tree Species Appendix. suitable for planting under low voltage lines – with some trimming potentially required. • Origin, defined as either indigenous to South Australia (Ind.), native to other States/Territories in Australia (Nat.), or introduced to Australia (Int.); • Form refers to the general habit or natural shape of the tree canopy at maturity; • Soil (texture and pH) shows the types of soils considered suitable for the species, with regard to texture. Cl = Clay, Gr = gravel; Li = Limestone; Lo = Loam; Sa = Sand • Soil pH shows the types of soils considered suitable for the species, with regard to acidity tolerance. 7 = alkaline soils with pH greater than 7. 15 Powerline Friendly Trees | SA Power Networks
Table 2. My-Zone look-up table showing 63 tree species suitable for planting under powerlines and the Climate zone to which each is best suited. CLIMATE ZONE SOIL .) AX M TE T( W AL ATE E RA E IN EIGH M AN M T PE NA AC S T AS PER NA ILD OLIT TE LIS H ID M E NO FIC CO EM ON OR ED AG AR TE NG E P UR I CT RO T NT ER M R M T TI RM HE IG PE XT AR M IS W ET IE OT PH EX CO FO EX SC TE SE M M Acacia cultriformis Knife-leaf Wattle Yes 4m Nat. Round Cl, Lo, Sa 7 - 2 Acacia oswaldii Umbrella Wattle Yes 5m Ind. Round Li, Lo, Sa 7 - 2 Acacia pycnantha Golden Wattle Yes Yes Yes Yes Yes 6m Ind. Oval Cl, Lo, Sa 7 >2m 2 Acacia victoriae spp. Elegant Wattle Yes 5m Ind. Domed Cl, Lo 7 >2m 2 Moderate weedy victoriae potential; Acer campestre ‘Elsrijk’ Field Maple Yes 7m Int. Round Cl, Lo, Sa 7 - - May require some trimming Acer monspessulanum Montpelier Maple Yes Yes Yes Yes 7m Int. Round Cl, Lo, Sa 7 - - Allocasuarina Drooping She-oak Yes Yes 8m Ind. Round Cl, Li, Lo, Sa 7 - - Grows to 5m in verticillata (Southern Lofty) coastal areas Angophora hispida Dwarf Apple Yes Yes Yes 7m Nat. Open Cl, Lo, Sa 7 - - Suitable in coastal e.g. Victor Harbor/ Goolwa. Demand has dropped Arbutus x andrachnoides Hybrid Strawberry Yes Yes Yes 7m Int. Round Cl, Lo, Sa 7 >3.5m 2 Potentially Tree invasive: A. unedo is listed under List 2 Banksia integrifolia Coast Banksia Yes Yes 8m Nat Spreading Cl, Lo, Sa 7 Written - approval for street or road plantings Banksia marginata Silver Banksia Yes Yes 8m Ind. Columnar Cl, Lo, Sa 7 - - Bauhinia variegata Orchid tree Yes Yes 8m Int Spreading Cl, Lo, Sa 7 - 2 In coastal areas plant away from exposed sea front Brachychiton acerifolia x Bella Donna Yes 8m Nat. Domed Lo, Sa 7 - 2 Frost sensitive, populneus 'Bella Donna' unreliable stock Brachychiton discolour x Griffith Pink Yes 8m Nat. Spreading Cl, Lo, Sa 7 - 2 Requires pruning populneus 'Griffith Pink' Callistemon citrinus Bottlebrush Yes Yes 4m Nat. Domed Cl, Lo, Sa 7 - 2 'Splendens' Callistemon citrinus Kings Park Special Yes Yes Yes 5m Nat. Domed Cl, Lo, Sa 7 - - Hardy and 'Kings Park Special' adaptable Callistemon citrinus x Harkness Yes Yes Yes Yes 8m Nat. Domed Cl, Li, Lo, Sa 7 >2m - Needs extra water viminalis ‘Harkness’ Bottlebrush for establishment in arid areas Callistemon viminalis Dawson Yes 6m Nat. Domed Cl, Lo 7 - - Best pruned after ‘Dawson River Weeper’ river Weeper flowering Bottlebrush Callitris gracilis Southern Cypress Yes Yes Yes Yes 14m Ind. Pyramidal Cl, Li, Lo, Sa 7 >2m - May grow to 5m in Pine some areas Callitris verrucosa Mallee Pine Yes 5m Ind. Pyramidal Lo, Sa 7 Written - approval for street or road plantings Cercis canadensis Eastern Redbud Yes 8m Int. Open Cl, Lo, Sa
CLIMATE ZONE SOIL .) AX M TE T( W AL ATE E RA E IN EIGH M AN M T PE NA AC S T AS PER NA ILD OLIT TE LIS H ID M E NO FIC CO EM ON OR ED AG AR TE NG E P UR I CT RO T NT ER M R M T TI RM HE IG PE XT AR M IS W ET IE OT PH EX CO FO EX SC TE SE M M Citrus glauca Lime Bush Yes Yes 7m Ind. Open Cl, Lo, Sa 7 - 2 Moderate weedy potential; Endangered in SA Citrus limon 'Eureka' Lemon Yes Yes Yes 6m Int. Oval Cl, Lo, Sa 7 - 2 Constricted roots will constrain size; Dwarf cultivars available Citrus limon 'Lisbon' Lemon Yes 6m Int. Oval Cl, Lo, Sa 7 - 2 Constricted roots will constrain size Citrus x sinensis Washington Navel Yes 5m Int. Oval Cl, Lo, Sa 7 - 2 Dwarf cultivars ‘Washington Navel’ Orange available Corymbia citriodora Dwarf Lemon Yes Yes Yes 8m Nat. Open Cl, Lo, Sa
CLIMATE ZONE SOIL .) AX (M TE HT W AL ATE E RA E AM AN M T IN EIG PE AC S T ER NA ILD LIT TE LIS CN H ID M P E NO M PO CO EM ON OR ED AG AR TE NG IFI E UR CT RO T NT ER M R M T TI RM HE AS IG PE XT AR M IS W ET IE OT PH EX CO FO EX SC TE SE M Fraxinus griffithi Evergreen Ash Yes 10m Int. Oval Cl, Lo, Sa 7 - - May require some trimming Fraxinus ornus 'Meczek' Flowering Ash Yes 5m Int. Round Cl, Lo, Sa 7 - 2 Slow growing and highly adaptable Geijera parviflora Wilga Yes Yes Yes Yes 7 >2m 2 Constricted roots will constrain size Gleditsia tricanthos Honey Locust Yes Yes Yes Yes 8m Int. Columnar Cl, Lo, Sa 7 >3.5m 2 Tolerates variable ‘Continental’ conditions; Does not produce fruit Hakea laurina Pin-cushion Yes Yes Yes 5m Nat. Domed Cl, Lo, Sa 7 >2m 2 Potentially invasive Hakea Hibiscus tiliaceus Red Cotton Tree Yes Yes Yes Yes 8m Int. Columnar Cl, Lo, Sa 7 - 2 Can be frost 'Rubra' tender Koelreuteria bipinnata Chinese Flame Yes Yes Yes Yes 6m Int. Oval Cl, Lo, Sa 7 - 2 May be difficult to Tree source Koelreuteria paniculata Golden Rain Tree Yes Yes Yes 10m Int. Oval Cl, Lo, Sa 7 >3.5m - May require some trimming Lagerstroemia indica Crepe Mrytle Yes Yes Yes 6m Int. Open Cl, Lo 7 - - Includes cultivars: ‘Natchez’, ‘Lipan’, ‘Tuscarora’, ‘Biloxi’, ‘Sioux’; Mildew resistant Melaleuca decussata Crossed-leaved Yes Yes Yes 5m Nat. Round Cl, Li, Lo 7 - 2 Need stock Honey Myrtle, grown locally Totem Poles to avoid risk of disease e.g. Myrtle rust. Swamp tolerant Melaleuca KI Paperbark Yes Yes Yes 6m Ind. Open Cl, Li, Lo, Sa 7 >3.5m - Does not like halmaturorum cold or wet feet. Saline swamp species Myoporum platycarpum Sugarwood, False Yes 6m Ind. Domed Li, Lo, Sa 7 - 2 Sandalwood Pistacia chinensis Chinese pistachio Yes Yes Yes Yes Yes 12m Int. Spreading Cl, Lo, Sa 7 - 2 May require some trimming Pittosporum Native apricot Yes 7m Nat. Spreading Cl, Lo,Sa 7 >2m; - angustifolium written approval for street or road plantings Podocarpus lawrencei Mountain Plum Yes 6m Nat. Open Cl, Lo, Sa
CLIMATE ZONE SOIL .) AX (M TE HT W AL ATE E RA E AM AN M T IN EIG PE AC S T ER NA ILD LIT TE LIS CN H ID M P E NO M PO CO EM ON OR ED AG AR TE NG IFI E UR CT RO T NT ER M R M T TI RM HE AS IG PE XT AR M IS W ET IE OT PH EX CO FO EX SC TE SE M Prunus cerasifera Purple-leaved Yes Yes Yes Yes 6m Int. Oval Cl, Lo, Sa 7 - 2 'Nigra' Cherry Plum Prunus cerasifera Flowering Plum Yes Yes Yes Yes 6m Int. Conical Cl, Lo, Sa 7 - - Moderate weedy 'Oakville Crimson Spire' potential; Non- invasive root system Prunus fruticosa Designer Cherry Yes 7m Int. Round Cl, Lo, Sa 7 - - 'Globosa' Pyrus betulaefolia Southworth Yes 8m Int. Oval Cl, Lo, Sa 7 - - Non-invasive 'Southworth Dancer' Dancer root system; May require some trimming Pyrus calleryana Ornamental Pear Yes Yes Yes 7m Int. Columnar Cl, Lo, Sa N, >7 >3.5m - For narrow, shaded streets – otherwise may require pruning; Includes varieties: ‘Capital’, ‘Southworth Dancer’ Pyrus calleryana x Ornamental Pear Yes Yes Yes Yes 8m Int. Round Cl, Lo, Sa N, >7 - - May require betulaefolia ‘Edgedell’ some trimming Santalum acuminatum Quandong Yes 5m Ind. Oval Cl, Li, Lo, Sa 7 - 2 Needs host plant, hard to source Sophora japonica Japanese pagoda Yes Yes Yes 6m Int. Round Cl, Lo, Sa 7 - - Highly tolerant tree of adverse conditions Tristaniopsis laurina Kanooka Gum Yes 10m Nat. Round Cl, Gr, Lo, Sa 7 - - Several cultivars e.g. ‘Luscious’ 19 Powerline Friendly Trees | SA Power Networks
Further Information 20 Powerline Friendly Trees | SA Power Networks
Further Information. Botanic Gardens of South Australia Plant Selector + http://plantselector.botanicgardens.sa.gov.au/home.aspx Climate zones http://www.bom.gov.au/climate/how/newproducts/images/zones.shtml http://www.csiro.au/awap/ http://www.metvis.com.au/acc/index.html Non-bushfire risk areas Further information include maps of non-bushfire risk and bushfire risk areas is provided in Schedule 4 of the Electricity Regulations (Principles of Vegetation Clearance) 2010 Nursery and Garden Industry www.ngisa.com.au Planting restrictions over underground power lines Near an underground power line of 66 kV or more, only trees with a mature height of less than 2 metres can be planted within 3 metres of the centre of the underground power line. Electricity Act 1996 and Electricity Regulations (Principles of Vegetation Clearance) 2010 Proposed changes to the Act and Regulations seek to extend the risk-based approach (adopted in metropolitan Adelaide in 2010) for clearance around low voltage powerlines to a number of non-bushfire risk areas to align clearance with risk (see diagram below). This includes the 10 towns over 10,000 residents: Mt Gambier, Port Pirie, Port Lincoln, Port Augusta, Whyalla, Victor Harbour/Goolwa, Mt Barker, Murray Bridge, and Gawler. Proposed changes also seek to remove the prescribed Lists contained within Schedule 2 of the Regulations to enable the List of approved species to be more flexible. Instead, a note within the Regulations would refer to a List of species approved by the Office of the Existing legislation (Non-bushfire risk areas) Proposed ‘risk-based’ legislation (Non-bushfire risk areas) Clearance zone – Trees allowed to ‘grow through’ Low Voltage powerlines based on a risk assessment Vegetation must be clear from inside of legislated Clearance Zones Low Voltage (LV) LV and High Voltage (HV) Low Voltage (LV) LV and High Voltage (HV) Key considerations: 1. Availability of emergency services 3. Built-up areas 2. Population density (>10,000) 4. Non-bushfire risk area 21 Powerline Friendly Trees | SA Power Networks
Contact... SA Power Networks sapowernetworks.com.au Contact: Alex Lewis (SA Power Networks Stakeholder Engagement Lead) alexandra.lewis@sapowernetworks.com.au SA Power Networks’ commitment and approach to vegetation management: Protocol for Vegetation Management Neat Powerlines 2016-2018 Trev the Tree and Stan the Stobie animation: sapowernetworks.com.au/centric/corporate/trees_and_powerlines.jsp www.youtube.com/watch?v=5W6mQsrEC98 22 Powerline Friendly Trees | SA Power Networks
Appendix A My-Zone Trees The following provides a pictorial reference to the species listed in the My-Zone Look-up table. Species are listed in the same order as in the Look-up table, and their scientific (botanical) and common names are provided, as well as the climate zone to which they are best suited. Attributions for all photos are provided in full in the My Tree Photos Attributions list. The full numbered references relate to the “Ref#” associated with each photo. Climate Zone Key M METROPOLITAN MT MILD TEMPERATE C COASTAL WT WARM TEMPERATE A ARID 1
Acacia cultriformis (Knife-leaf Wattle) A Ref:2 Ref:1 Acacia oswaldii (Umbrella Wattle) Ref:16 A Ref:3 Ref:26 Acacia pycnantha (Golden Wattle) M Ref:6 MT C WT A Ref:5 Ref:4 2 Powerline Friendly Trees | SA Power Networks
Acacia victoriae spp. victoriae (Elegant Wattle) Ref:14 A Ref:16 Ref:16 Acer campestre ‘Elsrijk’ (Field Maple) M Ref:8 Ref:7 Ref:8 Acer monspessulanum (Montpelier Maple) M Ref:6 MT C WT Ref:5 Ref:4 3 Powerline Friendly Trees | SA Power Networks
Allocasuarina verticillata (Drooping She-oak, Southern Lofty) MT Ref:13 C Ref:14 Ref:13 Ref:12 Ref:14 Angophora hispida (Dwarf Apple) M C A Ref:39 Ref:40 Ref:15 Arbutus x andrachnoides (Hybrid Strawberry Tree) M MT C Ref:64 Ref:64 Ref:44 4 Powerline Friendly Trees | SA Power Networks
Banksia integrifolia (Coast Banksia) MT C Ref:45 Ref:47 Banksia marginata (Silver Banksia) MT C Ref:17 Ref:9 Ref:38 Bauhinia variegata (Orchid Tree) M C Ref:50 Ref:50 5 Powerline Friendly Trees | SA Power Networks
Brachychiton acerifolia x populneus (Bella Donna) M Ref:20 Ref:20 Ref:21 Brachychiton discolor x populneus (Griffith Pink) M Ref:21 Ref:20 Callistemon citrinus ‘Splendens’ (Bottlebrush) M WT Ref:40 Ref:39 Powerline Friendly Trees | SA Power Networks 6
Callistemon citrinus (Kings Park Special) M C WT Ref:15 Ref:15 Callistemon citrinus x viminalis ‘Harkness’ (Harkness Bottlebrush) MT C WT A Ref:15 Ref:15 Callistemon viminalis ‘Dawson River Weeper’ (Dawson River Weeper Bottlebrush) WT Ref:42 Ref:41 7 Powerline Friendly Trees | SA Power Networks
Callitris gracilis (Southern Cypress Pine) M Ref:14 MT C WT Ref:24 Ref:23 Callitris verrucosa (Mallee Pine) A Ref:16 Ref:16 Ref:16 Cercis canadensis ‘Forest Pansy’ (Eastern Redbud) M Ref:81 Ref:82 Ref:84 8 Powerline Friendly Trees | SA Power Networks
Citrus glauca (Lime Bush) MT Ref:26 A Ref:43 Ref:25 Citrus limon ‘Eureka’ (Lemon) M MT WT Ref:28 Ref:27 Citrus limon ‘Lisbon’ (Lemon) M Ref:30 Ref:29 9 Powerline Friendly Trees | SA Power Networks
Citrus x sinensis ‘Washington Navel’ (Washington Navel Orange) M Ref:32 Ref:31 Corymbia citriodora (dwarf varieties) (Dwarf Lemon-scented Gum) M MT C Ref:83 Ref:83 Corymbia eximia ‘Nana’ (Dwarf Yellow Bloodwood) M Ref:15 Ref:33 10 Powerline Friendly Trees | SA Power Networks
Cupaniopsis anacardioides (Tuckeroo) Ref:16 M MT C Ref:16 A Ref:16 Eucalyptus albopurpurea (Port Lincoln Gum) M Ref:16 MT C A Ref:14 Ref:34 Eucalyptus calycogona (Square-fruited Mallee) MT Ref14 C Ref19 Ref:33 11 Powerline Friendly Trees | SA Power Networks
Eucalyptus erythronema var. erythronema (Red Flowering Mallee) C A Ref:19 Ref:19 Eucalyptus kruseana (Book-leaf Mallee) WT A Ref:19 Ref:35 Eucalyptus lansdowneana (Crimson Mallee Box) WT A Ref:19 Ref:33 12 Powerline Friendly Trees | SA Power Networks
Eucalyptus leucoxylon ‘Euky Dwarf’ (Dwarf SA Blue Gum) M MT Ref:37 Ref:36 Eucalyptus orbifolia (Round-leaved Mallee) A Ref:19 Ref:16 Ref:18 Eucalyptus platypus (Round-leaved Moort) MT Ref:33 C A Ref:33 Ref:16 13 Powerline Friendly Trees | SA Power Networks
Eucalyptus viridis (Green Mallee) A Ref:16 Ref:46 Ref:16 Eucalyptus websteriana (Webster’s Mallee) A Ref:19 Ref:33 Fraxinus griffithii (Evergreen Ash) M Ref:48 Ref:48 14 Powerline Friendly Trees | SA Power Networks
Fraxinus ornus ‘Meczek’ (Flowering Ash) MT Ref:49 Ref:49 Geijera parviflora (Wilga) Ref:51 M MT WT A Ref:52 Ref:34 Gleditsia triacanthos ‘Continental’ (Honey Locust) M MT C Ref:16 WT Ref:53 15 Powerline Friendly Trees | SA Power Networks
Hakea laurina (Pin-cushion Hakea) Ref:16 M MT C Ref:54 Ref:55 Hibiscus tiliaceus ‘Rubra’ (Red Cotton Tree) M MT C WT Ref:16 Ref:56 Koelreuteria bipinnata (Chinese Flame Tree) M MT C Ref:58 A Ref:57 16 Powerline Friendly Trees | SA Power Networks
Koelreuteria paniculata (Golden Rain Tree) M MT C Ref:60 Ref:59 Lagerstroemia indica (Crepe Myrtle & varieties) Ref:16 M MT WT Ref:62 Ref:61 Melaleuca decussata (Crossed-leaved Honey Myrtle) M MT C Ref:14 Ref:16 17 Powerline Friendly Trees | SA Power Networks
Melaleuca halmaturorum (KI Paperbark) Ref:14 M C WT Ref:14 Ref:14 Myoporum platycarpum (Sugarwood) A Ref:63 Ref:61 Pistacia chinensis (Chinese Pistachio) M MT C Ref:16 WT A Ref:66 18 Powerline Friendly Trees | SA Power Networks
Ref:10 Pittosporum angustifolium (Native Apricot) A Ref:11 Ref:22 Ref:10 Podocarpus lawrencei (Mountain Plum Pine) Ref:16 A Ref:16 Ref:67 Prunus cerasifera ‘Nigra’ (Purple-leaved Cherry Plum) M MT C Ref:69 WT Ref:68 19 Powerline Friendly Trees | SA Power Networks
Prunus cerasifera ‘Oakville Crimson Spire’ (Flowering Plum) M MT C Ref:70 WT Prunus fruticosa ‘Globosa’ (Designer Cherry) MT Ref:72 Ref:71 Pyrus betulaefolia ‘Southworth Dancer’ (Southworth Dancer) Ref:73 M Ref:70 Ref:73 Ref:73 20 Powerline Friendly Trees | SA Power Networks
Pyrus calleryana (Ornamental Pear varieties) M MT WT Ref:73 Ref:73 Pyrus calleryana x betulaefolia ‘Edgedell’ (Ornamental Pear) M MT C Ref:75 WT Ref:74 Santalum acuminatum (Quandong) Ref:16 A Ref:78 Ref:77 21 Powerline Friendly Trees | SA Power Networks
Sophora japonica (Japanese Pagoda Tree) M Ref:79 MT WT Ref:79 Ref:80 Tristaniopsis laurina (Kanooka Gum) Ref:76 M Ref:76 Ref:76 22 Powerline Friendly Trees | SA Power Networks
Further Information. My-Zone Tree Photos Attributions All photos used in the My-Tree Zones section have a Reference number (e.g. Ref1) which relate to the numbered attributions below. All attributions with an ALA source were obtained from the Atlas of Living Australia portal (https://www.ala.org.au/), and reproduced under the Creative Commons License (https://creativecommons.org/licenses/by/3.0/au/). In all cases, other than References 4 and 19, the Licensor has not endorsed any part of this booklet or use of the photos in this booklet. Images have not been modified other than resizing or trimming to fit the desired layout of this booklet. 1. © I. Kenpei; Sourced: https://commons.wikimedia.org/w/index.php?curid=2960615 2. By: M. Bedingfield; Supplied by: Canberra Nature Map; Sourced: ALA 3. By: D. Wood; Supplied by: © Plants of Scotia Sanctuary; Sourced: ALA 4. © F. O’Connor; Supplied by Francene O’Connor. 5. By: R.G. & F.J. Richardson; Rights holder: R.G. & F.J. Richardson; Sourced: ALA 6. © eigene Aufnahme - User:Der_Michels; Sourced: https://commons.wikimedia.org/w/index.php?curid=10003317 7. Sourced: https://www.thetutuguru.com.au/shop/elsrijk-field-maple/ 8. Sourced: http://treesplanet.blogspot.com/search?q=Acer+campestre+#.W4-DmsJ9iUk 9. © 2018 Freshford Nursery. Supplied via email. 10. © 2018 Peter Watton; Bush For Life Operations Manager; Supplied via email. 11. 2014 J. Tann; Pittosporum angustifolium fruit; CC BY 2.0; Sourced: https://commons.wikimedia.org/w/index.php?curid=3822649612. Sourced: http://www.eranurseries.com.au/allocasuarina-verticillata 13. Sourced: http://www.elster-creek.org.au/Allocasuarina-verticillata-Drooping-Sheoke.htm 14. © 2018 South Australian Seed Conservation Centre, Botanic Gardens of South Australia; Sourced: http://saseedbank.com.au/ 15. © 2016 GardeningWithAngus.com.au: Sourced: https://www.gardeningwithangus.com.au 16. © M. Fagg; Sourced: ALA 17. By D. & B. Wood; Supplied by: NSW South Coast & ACT Plants; Sourced: ALA 18. By K. Thiele; Sourced: https://commons.wikimedia.org/w/index.php?curid=63460579 19. © I. Roberts; Supplied by Ian Roberts. 20. © Humphris Garden Assets; Sourced: http://humphris.com.au 21. © 2018 Specialty Trees Pty Ltd; Sourced: https://www.specialitytrees.com.au 22. 2012 K. Thiele; Pittosporum angustifolium; CC BY 2.0; Sourced: https://commons.wikimedia.org/w/index.php?curid=51372091 23. By: R. Williams; Rights Holder: © R. Williams; Supplied by: iNaturalist; Sourced: ALA 24. By: T. & J. Dominelli; Supplied by: ALA species sightings and OzAtlas: Sourced: ALA 25. By: M. Saalfeld; Supplied by: ALA species sightings and OzAtlas: Sourced: ALA 26. By: © M. Marathon; Supplied by: https://commons.wikimedia.org/ 27. By: © Tomwsulcer; Supplied by: https://commons.wikimedia.org/w/index.php?curid=18770817; 28. © 2017 4D Media Ltd; Sourced: https://www.gardentags.com 29. © 2009 Coffs Harbour Butterfly House; Sourced: http://lepidoptera.butterflyhouse.com.au/plants/ruta/citrus-limon.html 30. © Edible Landscaping; Sourced: http://ediblelandscaping.com 31. © 2018 Northscaping Inc, all rights reserved. Sourced: http://www.qscaping.com/20000020/Plant/20278/Washington_Navel_Orange/ 32. By: © E.L. Finch (Elf); Sourced: https://commons.wikimedia.org/w/index.php?curid=39146 33. By: I.G. Holliday; Rights Holder: Director of National Parks; Sourced: ALA 23 Powerline Friendly Trees | SA Power Networks
34. © T. Johnson; Supplied: TreeNet Trials report 2017; Sourced: https://www.treenet.org/wp-content/uploads/2017/06/07TS_TREENET-TRIALS_ TimJohnson.pdf 35. By: J.R. Connors; Rights holder: Centre for National Biodiversity Research; Sourced http://www.anbg.gov.au/cgi-bin/apiiName 36. © 2018 ArborNet; Sourced: http://arbornet.com.au/containertrees-eucalyptusleucoxyloneukydwarf-p-942.html 37. © S. Forrester; Sourced: Naturally By Design http://www.naturallybydesign.com.au/design-for-living/ 38. Supplied by: ClimateWatch; Sourced: ALA 39. 2007 M. Donald; Nuts from Angophora hispida IMG_7012; CC BY-SA 2.0; Sourced: https://commons.wikimedia.org/w/index.php?curid=65667982 40. 2012 M. Donald; Angophora hispida DSC_0287; CC BY-SA 2.0; Sourced: https://commons.wikimedia.org/w/index.php?curid=65667975 41. Sourced: http://www.warragulgardenclub.com/339592383 42. By: Blerick Tree Farm; Sourced: http://www.onlinetrees.com.au/p/4451574/callistemon-viminalis---dawson-river-weeper.html 43. © R.W. Purdie, Sourced: ALA 44. Sourced: https://www.smgrowers.com/products/plants/plantimage.asp?plant_id=157 45. 2008 Ixitixel - eigene Arbeit; selbst fotografiert; CC BY-SA 3.0; Sourced: https://commons.wikimedia.org/w/index.php?curid=3891013 46. By: Brooker & Kleinig; Rights Holder Director of National Parks; Sourced: ALA 47. 2014 Tangopaso; Self-photographed; Public Domain; Sourced: https://commons.wikimedia.org/w/index.php?curid=32868406 48. Sourced: http://leafland.co.nz/trees/fraxinus-griffithii-evergreen-ash/ 49. Sourced: http://www.atreeaday.com/atreeaday/Fraxinus_ornus.html 50. n.d. G. Hull; http://web.gccaz.edu/glendalelibrary/; CC BY-SA 2.5; Sourced: https://commons.wikimedia.org/w/index.php?curid=1460845 51. Supplied by: Australian Native Plants Society (Australia); Sourced: ALA 52. By: Kym Nicolson; Supplied by: ALA species sightings and OzAtlas: Sourced: ALA 53. © 2007 Rob Hille; Sourced: https://commons.wikimedia.org/wiki/File:Gleditsia_tricanthos_0.7_R.jpg 54. Supplied by: Mostly Gardening; Sourced: https://diuris.wordpress.com/tag/hakea-laurina/ 55. © J.J. Harrison; Sourced: https://commons.wikimedia.org/w/index.php?curid=6669114 56. © F. & K. Starr; Sourced: https://commons.wikimedia.org/wiki/File:Starr_040608-0086_Hibiscus_tiliaceus.jpg 57. © avishai teicherUser:Avi1111; Sourced: https://commons.wikimedia.org/w/index.php?curid=2975610 58. © K. Golik; Sourced: https://commons.wikimedia.org/w/index.php?curid=65070716 59. © H. Zell; Sourced: https://commons.wikimedia.org/w/index.php?curid=10552615 60. © Fanghong; https://commons.wikimedia.org/w/index.php?curid=198559 61. © Didier Descouens; Sourced: https://commons.wikimedia.org/w/index.php?curid=27872003 62. © Σ64; Sourced: https://commons.wikimedia.org/w/index.php?curid=3012158 63. © 2018 East Coast Garden Center; Sourced: https://www.eastcoastgardencenter.com/plant-index/trees/item/crape-myrtle-biloxi.html 64. © 2012 D. Bos; Sourced: https://hackfalls.wordpress.com/2012/03/05/arbutus-x-andrachnoides/ 65. Sourced: © 2013 - 2018 Australian Plants Online 66. By: M. Ritter; Supplied by: Urban Forest Ecosystems Institute; Sourced: https://selectree.calpoly.edu/tree-detail/pistacia-vera 67. By: Melburnian; Sourced: https://commons.wikimedia.org/w/index.php?curid=12563032 68. © 2018 Get Horty; Supplied by: http://www.crocus.co.uk/images/products2/TR/00/00/00/46/TR0000004625_card2_lg.jpg; Sourced: https:// blogs.ubc.ca/larc316plantclassy/2015/11/08/prunus-cerasifera-nigra/ 69. © Rasbak; Sourced: https://commons.wikimedia.org/wiki/File:Prunus_cerasifera_Nigra.jpg 70. © 2018 Hutchisons Naracoorte: Sourced: https://hutchisonsplantsplus.com.au/top-10-trees-prunus-cerasifera-oakville-crimson-spire/ 71. Sourced: http://web03.bruns.de/bruns/en/EUR//Pflanzen/PRUNUS-fruticosa-%27Globosa%27/p/1531 72. Sourced: http://www.atreeaday.com/atreeaday/Prunus_fruticosa_Globosa.html 73. Sourced: http://www.onlinetrees.com.au/ 74. © Olinda Nurseries; Sourced: http://www.olindanurseries.com.au/tree-range-1/pyrus/pyrus-betulaefolia-x-edgewood 75. © 2018 Alpine Treemovals; Sourced: http://www.treemovals.com.au/product_info.php?products_id=103 76. Sourced: https://commons.wikimedia.org/ 77. Supplied By: Woolshed Thurgoona Landcare Group; Sourced: http://wtlandcare.org/details/santalum-acuminatum/ 78. © J. Moss; Sourced: https://commons.wikimedia.org/w/index.php?curid=4575008 79. © J-P Grandmont; https://commons.wikimedia.org/ 80. © Penarc; Sourced: https://commons.wikimedia.org/wiki/File:Sophora_japonica_(1b).jpg 81. 2014 RA Nonenmacher; Own work; CC BY-SA 4.0; Sourced: https://commons.wikimedia.org/w/index.php?curid=35878151 82. 2013 Famartin; Own work; CC BY-SA 3.0; Sourced: https://commons.wikimedia.org/w/index.php?curid=27751073 83. © 2018 Humphris Nursery. Supplied via email. 84. (2007) Betty from Memphis, TN, US; CC BY 2.0; Sourced: https://commons.wikimedia.org/w/index.php?curid=2890921 24 Powerline Friendly Trees | SA Power Networks
SA Power Networks sapowernetworks.com.au 25 Powerline Friendly Trees | SA Power Networks
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