City East Cable Tunnel City Sydney, NSW Country Australia Client Ausgrid Contract type Construct only Length 3.2 kilometers Power tunnels are an intelligent way to lay cable safely in large cities while ensuring easy maintenance. CIMIC subsidiary Thiess is currently building such a tunnel in Sydney. The 132-kilovolt tunnel with a diameter of 3.5 meters will connect two substations. With a total length of 3.2 kilometers, the tunnel will run through the city at a depth of 25 to 45 meters below ground. In addition to construction of the tunnel, this contract also includes building two concrete lined connectors, extending another cable tunnel as well as installing and commissioning all tunnel mechanical and electrical services.

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