e2Environmental have been involved, from the initial re-zoning process, through the various design, and construction phases over the past 12 years. The subdivision has four stages and is currently being expanded to include comprehensive zoning housing.
This was a 19 ha infill development on the northeast of Woodend, with constraints for stormwater discharge, distant from the gravity sewer serving the township, potential for historical artifacts due to the proximity to Kaiapoi Pa and a potentially problematic access off main north road (SH1).
e2Environmental built a detailed hydraulic 1D model of the development and neighbouring catchments to size stormwater pipe reticulation and basins to manage stormwater in events up to and including 50-year return period. This allowed the reviewing and setting of minimum floor levels throughout the site. e2Environmental also designed a wastewater pump station and rising main to serve 190 houses and modelled the earthworks to minimise the need for imported fill.
The outcome was a 4 m deep wastewater pumpstation with a 1.3 km DN180 PE pressure main, and a 1.8 ha stormwater management area, 2.6 km of roading and associated services for this development.
This project is a showcase of hydraulic modelling, stormwater management, wastewater pump station design.
Established enduring relationship with Developer and Contractor to multiple stages over 11 years of development, demonstrates the quality of our engineering and client support.
Project manager(s)
John Wilson
