Using the strategic objectives, we assessed and rejected a number of alternative options for the HTP preliminary corridor.
The existing 330 kV transmission easement between Bayswater and Richmond Vale
This option would be more expensive because the existing lines would need to be taken down and rebuilt to create space for the HTP. It would also take longer, ruling out any likelihood of delivering the HTP by early 2028. This is because the existing lines are essential for supplying electricity to Newcastle, making it difficult to secure the outages needed to construct the new transmission line. Finally, it would increase energy security risks in NSW by concentrating all electricity supply between Bayswater and Newcastle in a single easement.
Next to the existing 330 kV transmission easement
This option would cause significant land use conflicts in the Pokolbin wine/tourist area. It would also cause extensive clearing of endangered valley floor vegetation. This includes the Warkworth Sands Woodland and Central Hunter Valley Eucalyptus Forest and Woodland in areas such as the Singleton Military Area, Werakata State Conservation Area (SCA) and Werakata National Park.
The bushland to the south of the Pokolbin wine/tourist area
This option would result in even greater clearing of endangered valley floor vegetation in the Werakata SCA and Werakata National Park. This vegetation provides critical habitat for several threatened species such as the Swift Parrot and Regent Honeyeater. This option would also cause significant landscape-wide visual impacts in the rural-residential areas around Ellalong and Quorrobolong.
The valley further south of the Pokolbin wine/tourist area
This option would result in significant land use conflicts with the growing residential areas around Millfield and Mount View. It would also cause significant landscape wide visual impacts in the rural-residential areas around Ellalong and Quorrobolong.