Eastern Portal David Galwey Tree Dimensions Arboriculture Eastern - - PowerPoint PPT Presentation

Arboriculture Eastern Portal

David Galwey Tree Dimensions

Arboriculture – Eastern Portal

Corrections to EES

• Tree EP217 represents ~50 Ailanthus trees
• Tree EP218 represents ~40 Acacia trees
• Therefore there are ~88 more trees than identified individually in the EES
• In the EES I refer to “up to 218 trees” being impacted or removed
• It is more accurate to state that up to 306 trees may be impacted or

removed

• These additional trees are self-sown and weedy in nature

Arboriculture – Eastern Portal

South Yarra is a densely populated area within the City of Stonnington. Assumption: that all trees within the Eastern Portal precinct will require removal for construction. In fact, some trees may be able to be retained, depending on final design and construction methods. We assessed all trees within the

• precinct. What would be lost,

individually and overall?

Arboriculture – Eastern Portal

There are several distinct zones within the precinct.

• Osborne Street
• Linear reserve along Osborne Street
• South Yarra Sidings Reserve
• Rail corridors
• (Davis Avenue)

Arboriculture – Eastern Portal

Osborne Street

• 18 trees
• Mostly Callery Pears
• Mostly planted in the naturestrip

along west side of Osborne Street

• Amenity, especially for residents

along Osborne Street

Arboriculture – Eastern Portal

Linear Reserve along Osborne Street

• 46 trees
• Australian native plantings from

1970s and more recently

• Amenity along Osborne Street
• Some mature trees have short ULEs

and are hazardous

Arboriculture – Eastern Portal

Linear Reserve along Osborne Street

• 46 trees
• Australian native plantings from

1970s and more recently

• Amenity along Osborne Street
• Some mature trees have short ULEs;

some are hazardous

Arboriculture – Eastern Portal

South Yarra Siding Reserve

• 51 trees
• Mostly Australian native plantings
• Ad hoc plantings: no particular

landscape theme and relatively low amenity value

• Two large trees of individual

significance toward northern end: Sugar Gum and Canary Islands Date Palm

Arboriculture – Eastern Portal

South Yarra Siding Reserve

• 51 trees
• Mostly Australian native plantings
• Ad hoc plantings: no particular

landscape theme and relatively low amenity value

• Two large trees of individual

significance toward northern end: Sugar Gum and Canary Islands Date Palm

Arboriculture – Eastern Portal

Rail corridors

• 191 trees
• Australian native plantings,

Peppercorn trees, Elm and Robinia suckers, and Tree of Heaven (Ailanthus altissima) which is a declared noxious weed

• Providing tree canopy along rail

corridor

Arboriculture – Eastern Portal

Davis Avenue

• Plane trees
• Not being removed
• Tunnelling beneath and grout

injection would not affect trees

Arboriculture – Eastern Portal Summary of trees

MLTV1 trees Weedy self- sown Others (non-MLTV, non-weedy) Total South Yarra Sidings public realm 36 15 51 Osborne St and linear reserve public realm 36 1 27 64 Rail corridors non-public realm 25 158 8 191 TOTAL 97 159 50 306

1 Medium and Long Term Viability tree

Arboriculture – Eastern Portal

Summary of impacts

Removal of trees across the Eastern Portal will result in temporary loss of amenity as well as the loss of ecosystem services. However new plantings could replace this and it would be possible to have no residual loss of either landscape quality or tree canopy cover within 20-30 years. Of course, this relies on the development of high-quality landscape plans that include significant tree planting. The project provides an opportunity to greatly improve the landscape amenity of South Yarra by planning and constructing a landscape that provides access to green space and tree canopy cover.

Arboriculture – Eastern Portal Summary of submissions

Issue Submissions Response EPR Temporarily lift and store trees to be replanted following construction. MM017 Not suitable for large evergreen trees. Not worth it for small deciduous trees. NA Retain as many trees as possible. Minimise amenity loss that may result from loss of open space. MM091, MM135, MM162, MM266, MM354 Vegetation removal will be minimised where possible. This will depend on construction requirements. Many trees in the precinct have low value or short ULEs. AR1 Ensure water supply is available to trees; integrate water harvesting and reuse. MM091 Supply irrigation for tree root zones, especially during their establishment stage. Use WSUD principles where

• possible. Amend AR2 to include these requirements.

AR2 Ensure replacement trees are planted. MM266, MM354 There is an opportunity to improve the overall landscape value of SY Sidings Reserve and Osborne Street, including tree canopy cover. Planting established trees will minimise time required for a mature landscape. AR3 Amenity and screening loss for residents along Osborne Street. MM266 Loss of screening and amenity will be minimised if possible depending on construction requirements. AR1 Prepare appropriate tree protection plan to manage and mitigate adverse impacts. MM354 The need for tree protection plans has been identified and recommended. AR3

Arboriculture – Eastern Portal

EPRs

Minimise tree removals AR1: During detailed design, review potential tree impacts and provide for maximum tree retention where possible. Prior to construction of main works or shafts, develop and implement a plan in consultation with the relevant local council that identifies all trees in the project area which covers:

• Trees to be removed or retained
• Condition of the trees to be removed
• Options for temporary re-location of palms and reinstatement at their

former location or another suitable location.

Arboriculture – Eastern Portal EPRs

Provide suitable conditions for establishing new trees AR2: Reinstate quality soils to sufficient volumes to support long-term viable growth of replacement trees. Suggested amendment: Ensure ongoing supply of water to tree root zones, especially during their establishment stage. Employ WSUD principles where possible.

Arboriculture – Eastern Portal

EPRs

Replant trees to maximise canopy cover AR3: Re-establish trees to replace loss of canopy cover and achieve canopy size equal to (or greater than) healthy, mature examples of the species in Melbourne. Consult with the City of Melbourne, the City of Port Phillip, the City of Stonnington, the Shrine of Remembrance and Shrine Trustees and Heritage Victoria as applicable. Policy documents that must be followed to re- establish trees and valued landscape character include:

• The City of Melbourne’s Tree Retention and Removal Policy and Urban Forest Strategy
• The City of Port Phillip’s Community Amenity Local Law No. 1 and Greening Port Phillip – An Urban Forest Approach
• The City of Stonnington’s General Local Law 2008 (No 1) and City of Stonnington Street Tree Strategy
• Any associated precinct plans
• Specific policies of the Domain Parklands Conservation Management Plan (CMP), for trees within Domain Parklands
• Shrine of Remembrance: Shrine of Remembrance CMP (Lovell Chen, 2010) or any future review and the Shrine of Remembrance

Landscape Improvement Plan (rush Wright Associates, 2010)

• South African Soldiers Memorial Reserve: Any relevant CMP for the South African Soldiers Memorial
• Fawkner Park Conservation Analysis (Hassell, 2002) and the Fawkner Park Masterplan (City of Melbourne, 2005)
• The preferred future character of the University of Melbourne, for trees in the grounds of the University of Melbourne.

Arboriculture – Eastern Portal EPRs

Protect trees that are retained AR4: Prior to construction commencing of main works or shafts in affected areas, prepare and implement Tree Protection Plans for each precinct in accordance with AS4970-2009 Protection of Trees on Development Sites, addressing the detailed design and construction methodology of the project. Within precincts 1, 4 and 7 a Tree Protection Plan must be developed for each heritage place as relevant to the satisfaction of Heritage Victoria or the responsible authority.