With construction commencing in 2017 and completed in September 2018, the $120 million Dryandra Road Underpass is an incredible piece of design and engineering.
It was constructed five metres below sea level, and as such, required constant de-watering during construction. In total, the equivalent of over 1,000 Olympic swimming pools of water was removed.
Nearly 20,000m3 of heavily reinforced concrete was poured, and it is 1.6 metres thick at the deepest point of the roof – ensuring the two linked taxiways can withstand the weight of a fully-laden A380 and future variants of up to 710 tonnes.
The Dryandra Road Underpass supports 1.1km of separated public roadway, allowing access to the General Aviation Precinct and the plane spotters’ area on Acacia Street. Planes will taxi over the top of the public roadway, connecting the existing terminals to the new runway once it is operation in mid-2020.