Drone images offer a glimpse of the ongoing work at Great Yarmouth's third river crossing as it nears a crucial point.

The ongoing development, which will link the A47 at Harfrey’s roundabout to the port and the enterprise zone via South Denes Road on the other side of the River Yare, is about to enter its next crucial stage.

Two bascule bridge leaves, weighing 700 tonnes each, will be installed at the crossing over the next two weeks. Each leaf is 62 metres long and 20 metres wide.

Great Yarmouth Mercury: One of the bascule bridge leaves set to be installed at Great Yarmouth's Herring Bridge. Picture - Norfolk County CouncilOne of the bascule bridge leaves set to be installed at Great Yarmouth's Herring Bridge. Picture - Norfolk County Council (Image: Norfolk County Council)

Recent drone shots show how far the project has come, with entrance roads on either side of the river now complete. 

The third river crossing - which following an online poll has been named Herring Bridge - is expected to open in the summer.

Once the leaves have arrived, they will be moored up in the river while final preparation works begin.

Great Yarmouth Mercury: Latest drone images show the progress of Great Yarmouth's Herring Bridge. Picture - Norfolk County CouncilLatest drone images show the progress of Great Yarmouth's Herring Bridge. Picture - Norfolk County Council (Image: Norfolk County Council)

READ MORE: Richard Herring claims Yarmouth's new bridge named after him

A Matador 3 floating crane will be used to lift the leaves off the barges and hold them above the bascule chambers while they are attached.

Once the leaves are in place, 500 tons of concrete - forming the bridge's counterbalance - will also be added to the structure

The installation process is expected to take around 72 hours. During the installation, the river will be closed to all waterway traffic.

Great Yarmouth Mercury: The new access roads to the Herring Bridge from Southgates Road, Great Yarmouth. Picture - Norfolk County CouncilThe new access roads to the Herring Bridge from Southgates Road, Great Yarmouth. Picture - Norfolk County Council (Image: Norfolk County Council)

Mariners have been told the closure is scheduled from 8am on Tuesday, March 21. However, all operations are subject to suitable weather conditions that could impact the next phase.

Last month, work was halted at the Herring Bridge following the discovery of an unexploded device in the river bed close to the bridge’s construction site.

Following a four-day evacuation and emergency response, the 250kg bomb was safely detonated without any loss of life or significant damage to the main construction.