This bridge over the Molonglo River will be the last section of the John Gorton Drive to be completed (2024). There is not much information available about this bridge. The bridge required environmental approval for its construction. Further, the bridge is mentioned in the ACT Infrastructure Plan 2019. The following information from those reports.
The most recent update on the John Gorton Drive Bridge is found here from 12 February 2021.
Information from reports
John Gorton Drive Exemption Application
The typical cross section for the road design has been developed in accordance with the adjacent sections of John Gorton Drive (dual lane carriage way). This is defined as an: 8m verge containing a 3m shared pedestrian/cycle path, a road carriageway comprising of a 2m shoulder for a dedicated bicycle lane, two 3.5m traffic lanes with a 12m central median (to accommodate future light rail).
Included in the median is a 0.5m offside shoulder on each carriageway.
The bridge itself is proposed as a three-span haunched steel girder bridge, 227.5m long (see Figure3-1). Total width about 34m.
Provide a bridge which is aesthetically pleasing to the Molonglo Valley area and matches the architectural properties of the existing Butters Bridge to compliment the “Family of Bridges” concept.John Gorton Drive 3C Extension (JGD3C) 211 EIS Exemption Application, 27 September 2019, Environment Protection and Biodiversity Conservation Act 1999 (Cth) (EPBC Act)
ACT Infrastructure Plan 2019
Priorities – the next five years
Connecting Molonglo – John Gorton Drive and Molonglo River Bridge crossing.
The Molonglo River bridge crossing and completion of John Gorton Drive is a major piece of infrastructure that will support significant land releases in Molonglo, including the full development of Denman Prospect and the Molonglo Commercial Centre. When built, the new bridge will span 227.5 metres across the region’s major river. The completed arterial road and bridge crossing will also support public transport, active travel and potentially a future light rail route. The new bridge will be built to withstand a one in one hundred year flood level, and significantly improve traffic safety compared with the current crossing. As new communities grow at Whitlam, Denman Prospect, Coombs and Wright, this is leading to increased traffic and the need for stronger transport links across the Molonglo Valley. …
The bridge and arterial road will also support continued release of future estate developments in Whitlam and East Molonglo 3. Geotechnical investigations and preliminary sketch plans are underway and will include provision for utilities and telecommunications infrastructure. An Environmental Impact Statement will also be needed to obtain the necessary development approvals. (Note: both now completed) Design and construction is expected to commence in 2020-21 and be completed in 2024.ACT Infrastructure Plan 2019, ACT Government, 2019