Did you know?

Many RTA engineering and construction projects involve the labour and effort of thousands of individuals, innovative approaches and engineering feats, and the movement of vast quantities of building materials and spoilage.

Some of the more interesting facts about the Lane Cove Tunnel are tabled below.

Crunching the numbers

During the Lane Cove Tunnel construction:.

• 25,000 cubic metres of concrete pavement were laid.
• 10,000 tonnes of new asphalt were laid.
• 16 kilometres of new kerb and guttering were constructed.
• 27 kilometres of new line markings were added.
• 450 truckloads of concrete went into making the shared pedestrian/cycleway.
  (Source: TJH)

Getting down and dirty

Nine road header machines excavated the tunnels. The machines weighed up to 140 tonnes each and excavated approximately six lineal metres per day. Excavated material ran on a conveyor belt to waiting trucks that removed it from the tunnel.
While rock breakers featured prominently in the construction of the Lane Cove Tunnel, other heavy machinery such as pile drivers, cranes and graders were also used.

How low can you go?

On average the tunnel is 30 metres below the natural surface. At Stringybark Creek it is 16 metres below the creek bed.

Bringing in the troops

Around 8500 individuals participated in the design and construction of the Lane Cove Tunnel.
(Source: Thiess John Holland induction records.)