Project Overview
The Sun South project for the Bells Creek High Voltage Powerlines Extension and Substation involved the construction of a 132kV dual circuit electricity line and a new substation. The project incorporated overhead and underground infrastructure and included a detailed ecological assessment to ensure compliance with environmental regulations. It was designed to minimise environmental impacts, particularly in sensitive areas like the Bells Creek waterway corridor, where a new substation was constructed.
The ecological assessment aimed to evaluate the impacts of the proposed infrastructure on local flora, fauna, and environmental processes. The proposal featured overhead and underground powerlines spanning approximately 3.7km.
The assessment was critical in guiding development planning and ensuring compliance with Commonwealth, State, and Local legislation. Detailed flora and fauna surveys identified no significant ecological constraints that would inhibit the project. The proposed powerline extension followed existing road networks and was designed to minimise environmental impacts using tunnel boring techniques under sensitive areas like the Bells Creek watercourse.


Project Outcomes
The assessment understood the site’s ecological values and constraints. The team identified areas of greater environmental significance (e.g., Bells Creek), allowing mitigation strategies to be used (e.g., tunnel board section).
Surveys showed minimal ecological disturbance due to the strategic placement of overhead and underground lines. The project also found that the site allowed six fauna species to occur within the corridor. To mitigate the risk of direct mortality via clearing and habitat destruction, the project proposed the presence of a qualified fauna spotter during clearing activities and avoiding peak breeding seasons.
Leading Change
The project demonstrated a proactive approach to assessing and managing ecological impacts. By conducting thorough surveys and proposing mitigation strategies, Therefor Group provided the client with a development plan that adhered to ecological guidelines and legislation.
Therefor Group’s core values were aligned by:
- Ensuring local biodiversity and community interests were protected throughout the process.
- Working with Energex Limited and Council to meet environmental and infrastructure goals.
- Demonstrating leadership in environmental management by conducting detailed assessments and adhering to best practices in ecological preservation.
The strategic placement of the powerlines along existing road networks minimised the impact on natural habitats, while the undergrounding of infrastructure through sensitive areas reduced visual and environmental disturbance. This is an excellent example of how essential infrastructure can coexist with ecological preservation, promoting sustainable development that benefits the community.
The project promoted positive, lasting change by delivering essential infrastructure while safeguarding local ecosystems, showcasing our commitment to responsible development.