What is AS4970-2009 Protection of trees on development sites?
Conducting an aerial inspection on an old Elm in one of Melbourne’s many parks.
Introduction
The Australian Standard AS4970-2009, “Protection of Trees on Development Sites,” is a critical document that guides the integration of these natural monuments within the ever-expanding urban landscape. This article unpacks the essence of AS4970, explores its importance, and highlights the role of consulting arborists in ensuring its success.
What is AS4970-2009?
AS4970 is a comprehensive set of guidelines that provides a blueprint for the protection of trees during the various phases of construction and development. It outlines the criteria for tree assessment, retention, and the establishment of protective measures to mitigate the impact of development activities.
Why AS4970-2009 Matters
Trees are not merely aesthetic elements; they are crucial to the ecological balance, providing habitat, air purification, and contributing to the mental well-being of residents. In Melbourne, a city that prides itself on its green spaces, AS4970 is the safeguard that ensures urban development does not come at the cost of environmental degradation3.
The Role of Consulting Arborists
Early Involvement and Tree Evaluation
Consulting arborists are the frontline of tree protection, engaging from the initial stages of development to assess and identify trees that are significant and warrant preservation according to AS4970 standard. To read more about what a Consulting Arborist is, follow this link.
Tree impact assessment report
An Impact Assessment Report in relation to the AS4970 standard is a comprehensive document that evaluates the potential effects of proposed development activities on existing trees within and around a development site. It is a crucial step in the process outlined by AS4970, which mandates the assessment of trees to determine their significance, health, and viability before any development occurs. The report details the findings from a preliminary tree assessment and arboricultural report, and it includes recommendations for tree protection measures, ensuring that the development complies with the tree protection requirements specified in the standard. This report not only assesses the direct impact on the trees but also considers the broader ecological implications, providing a roadmap for developers and arborists to work together to minimise negative impacts on the urban forest, particularly in sensitive areas like Melbourne and Victoria where the preservation of native vegetation is of paramount importance
Nature strip tree with its TPZ (Tree Protection Zone) in place prior to commencement of construction.
Establishing Tree Protection Zones
A key component of AS4970 is the Tree Protection Zone (TPZ), a defined area around a tree that is set aside for its protection. Consulting arborists are responsible for determining the TPZs, which are crucial for the tree’s survival during and after the development process.
Monitoring and Ensuring Compliance: Project arborist
Arborists play a continuous role in monitoring construction sites to ensure compliance with AS4970. They provide guidance and adjustments to protection measures, ensuring the longevity and health of protected trees and ensure that compliance is met throughout every stage.
AS4970 in Melbourne
Local Policies and Regulations
Melbourne’s commitment to its urban forest is reflected in local policies that align with AS4970. The City Of Melbourne’s - Tree Retention and Removal Policy, 2012, for instance, underscores the city’s dedication to preserving its arboreal heritage. Victoria’s planning provisions also emphasise the protection of native vegetation, further bolstering the application of AS49703. I’ve got more information on councils such as City Of Yarra, City Of Melbourne and City Of Port Phillip , click the links if you’d like to see how each council handles their own policies.
Success Stories in Implementation
Melbourne and Victoria have numerous success stories where AS4970 has been effectively implemented, showcasing the possibility of harmonious coexistence between urban development and natural preservation.
Conclusion
In conclusion, AS4970 is a testament to the foresight and commitment of Melbourne and Victoria to preserve their natural landscapes amidst rapid urban development. It underscores the importance of trees as integral components of urban ecosystems, contributing to biodiversity, climate resilience, and the well-being of communities. Consulting arborists are the custodians of this standard, employing their expertise to guide and ensure the successful integration of nature within the built environment. Their role is not just about compliance but about advocating for a future where green spaces and urban infrastructure coexist in a sustainable, life-enhancing symbiosis. As Melbourne continues to grow, AS4970 stands as a beacon of sustainable development, ensuring that the city’s green legacy thrives for generations to come. If you’re reading this and you have an upcoming project, please get in touch!
