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Civil Engineer (Stormwater / Servicing)
engineering
When you need one
Stormwater detention, drainage design, road / driveway design, sewer / water connection design, MUSIC modelling for water quality.
Qualifications
Bachelor of Civil Engineering + CPEng + (QLD: RPEQ).
Professional body
Engineers Australia
Typical cost (Single dwelling stormwater + driveway)
A$1,500–35,000
Per-state notes
Council DCPs typically prescribe OSD requirements. Sydney Water has separate connection approval. QLD: RPEQ mandatory for hydraulic + stormwater documents.
Key outputs
- ✓Stormwater calculations (impervious area pre/post)
- ✓On-Site Detention (OSD) volume + permissible site discharge (PSD)
- ✓Pit + pipe network sizing
- ✓MUSIC model results (target: 80:45:45 TSS:TP:TN)
- ✓Rainwater tank sizing
- ✓Overland flow paths
- ✓Driveway grades + drainage
- ✓Erosion + sediment control plan
What triggers engaging them
- ▸Any DA increasing impervious area
- ▸Subdivision (mandatory)
- ▸Driveway on classified road
- ▸Site in flood-prone area (combined with hydrologist)
Notes
Civil engineering is often outsourced to civil-engineer-only consultancies. Stormwater is the biggest Council referral item for typical DAs — get this right.