ADDRESS Pittwater Road, Brookvale
VALUE Stage 1 and 2 – $35.9 million
Warringah Mall is a major retail hub on the northern beaches where our client needed to install infrastructure to control and divert stormwater flows which historically caused flooding.
Mainland’s scope was the reconstruction of Brookvale Creek, installation of twin underground culverts bearing on concrete piles, lowering the RMS asset of quad culverts under Condamine Street and reconstruction of all the carparks, thoroughfares and internal roads.
Brookvale Creek had undergone significant erosion over the years and the scope included reshaping, installation of upside-down culverts and landscaping the area while the creek was continually flowing.
Twin culverts were installed from the downstream outlet of Brookvale Creek, through the carparks and then into Condamine Street, a total culvert lineal meterage of approx. 1200m.
The site was contaminated throughout with GSW, ASS and Hazardous Waste and had to be remediated in conjunction with the infrastructure installation.
On completion, all the flexible pavement carparks were re-constructed to provide in excess of 400 car spaces.