The 94-lot subdivision just south of Hamner is in a tricky location, built on an alluvial fan with a fault trace, geologically complex conditions, traces of peat, and perched groundwater.
The challenge is to build a stormwater management system that meets all the global consent conditions for Hamner township, does not intercept groundwater, maintains existing natural wetlands, and can convey extreme flood flows across the site.
e2Environmental was engaged to develop a hydraulic model for the stormwater reticulation and basins that accounted for the various geotechnical constraints while still achieving desired lot yields for the subdivision. We collaborated with the project design team, council planners and landscapers to achieve a stormwater design that avoided groundwater inflows, worked within the Hurunui District Council consent conditions, and stayed within the developer’s intent for lot yields.
Project builds on our trusted advisor role with Hurunui District Council to assess and deliver stormwater solutions.
e2Environmental specialize in modelling complex stormwater constraints to deliver solutions which minimise excavation and dewatering.
Project manager(s)
Lindsay Blakie
Services involved:
