The Challenge           

City Rail Link is the largest infrastructure project ever undertaken in New Zealand and includes construction of twin 3.45 km rail tunnels up to 42 m under the Auckland CBD. 

Aquatic Engineering was engaged to design and construct a water treatment plant (WTP) for the Mercury Lane site, treating ground and construction water for discharge to stormwater. The WTP had it be designed to fit under a mezzanine and around columns of the site acoustic shed.