WOOLSTON TRUNK MAIN REPLACEMENT

CLIENT: Stronger Christchurch Infrastructure Rebuild Team (SCIRT) - Downers

COMPLETED: 2016

Replacement of existing DN700 trunk main, damaged during the Christchurch Earthquakes, and replace with DN700 GRP pipeline. Also replaced were the local submain and associated manhole structures along damaged section. 

Excavation depths up to  5mtrs deep in poor ground conditions with high water table. Well point de-watering with multiple pumps was used to deal with high volume of ground water. Extensive wastewater bypass pumping was used to contend with existing flows while works were undertaken.