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Ormiston Road, Flatbush Subdivision

This $50 million dollar residential subdivision involved 50 rural residential lots spread along ridgelines with associated roads, retaining walls, services and a bridge. The subdivision is located in the Southern Landslide Zone and includes a Transpower easement passing through the subdivision.

LDEl provided services from conception to completion of this project to ensure the client could delivered stable building platforms for each lot in a cost effective and expedient manner. The services provided included:
  • Geological mapping was carried out to define the geotechnical model for the site and then was supplemented with additional site investigation to support detailed design and resource and building consents.
  • Detailed slope stability assessments and involvement in the earthworks design process.
  • Design of in-ground (palisade) walls to protect proposed building platforms from adjacent slip features and design of cantilever retaining walls to facilitate road construction.
  • Geotechnical input into accessway bridge pile foundations and stability of abutments.
  • Construction observations throughout the subdivision earthworks, drainage and retaining wall construction works.
  • Completion reporting and sign off documentation for the subdivision.

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