Case Studies
Stormwater, flood and civil projects approved across NSW councils.
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OSD reduced by 30% — Dual Occupancy, Northern Beaches
Northern Beaches Council · Dual occupancy ·
Council's charts called for more detention than the site could hold. Site-specific DRAINS modelling cut the required volume by 30%. Approved.
Overland Flow Assessment — Single Dwelling, Mosman
Mosman Council · Alterations & additions
The site sits low in its catchment and floods in large storms. The question was whether street-level extensions could be built at all. Approved.
Flood Risk Assessment — Commercial Shopfront, Northern Beaches
Northern Beaches Council · Commercial
The client wanted to lower the floor level on flood-affected land. Council's own flood controls contradicted each other. We had it resolved. Approved.
Road Widening & Stormwater — 10 Multi-Dwelling Homes, Lake Macquarie
Lake Macquarie City Council · Multi-Dwelling
Council required a road widening but wouldn't say how far it extended — and part of the existing road sat on private land. Approved.
Change of Use — Stormwater, Flood & Public Domain, Inner West
Inner West Council · Change of use
Wall-to-wall boundaries with nowhere to run pipes, a basement surrounded by floodwater, and a driveway that had to become a footpath. Approved.
Overland Flow & OSD — New Dwelling, Inner West
Inner West Council · New Dwelling
Council's pre-DA advice would have cut the floor plan back for an open flow channel. We argued it down, then swapped the OSD for a rainwater tank. Approved
Disclaimer: Illustrative renders are AI-generated. Engineering outcomes and real details are described in the approved projects.