Golden Gate Bridge Seismic Retrofit and Deck Replacement

Golden Gate Bridge Seismic Retrofit and Deck Replacement

The concrete was replaced with two preformed road sections laid on the exposed floor beams of the bridge structure and the road was widened by 24 inches. The replacement orthotropic surface is 40 percent lighter than the old concrete, and the steel supports of the new structure form the roadway itself. Each of the more than 750 20-ton highway panels and 325 sidewalk panels was individually designed for its particular location.

Azmir Motorway

Izmir-Aydın Motorway and Izmir Ring Road

Located in the Aegean region of Turkey and part of the Trans-European Road Network, the Izmir Ring Road Motorway project consists of the 53 km Ring Road and the 96 km Izmir-Aydın Motorway. This $1.06 billion project includes three lanes in each direction, secondary roads, junctions, and directional arms which total 333 km of road construction.

Manapouri Second Tailrace Tunnel

Manapouri Second Tailrace Tunnel

Located in New Zealand, the Second Tailrace Tunnel was constructed to improve the efficiency of the Manapouri Power Station. This $212 million project enabled the generation of an additional 640 GWh a year without using more water – enough electricity to power about 64,000 homes for a year.

Selatin Tunnel

The 75th Anniversary Selatin Tunnel

The 75th Anniversary Selatin Tunnel was the longest tunnel in Turkey when it was completed. Its twin bores are 3,018 m and 3,043 m long, 12 m wide and 4.80 m high, and carry three lanes of traffic in both directions.

Deep Cove

Deep Cove Environmental Project Commitment

As part of the Manapouri Second Tailrace project, DCII was committed to protecting the fragile marine ecosystem at Deep Cove. The Deep Cove portal, which provided construction access to the project, was 43m below sea level and required both a sheet pile coffer dam and deep well pumping system.