Wastewater & Sewerage
Sewers, treatment plants and pumping stations — the infrastructure nobody visits.
Wastewater work is tunnelling, pipe-jacking, deep chambers and process civils — often in live urban streets, always in someone's way, and usually below the water table. The corridor civils, dewatering and shaft-sinking methods are shared with the transport and water sectors, linked below; what distinguishes this sector is what flows through the assets when you finish.
The four guides in this sector cover sewer network construction — open-cut and trenchless; wastewater treatment works, where process civils meet odour control and a commissioning regime measured in biological performance, not just pressure tests; sewage pumping stations; and utility tunnels and pipe-jacking, the trenchless end of the trade where the drive happens underground and the surface never knows.
What does Wastewater & Sewerage cover?
Process guides in Wastewater & Sewerage
- Sewer Network Construction — Gravity sewers laid in open cut to exact line and gradient, manholes at every change of direction, rising mains where the levels give up — tested, CCTV-surveyed and adopted before the first house connects.
- Wastewater Treatment Works Construction — The process civils that turn sewage into clean water — water-retaining concrete tanks, aeration lanes, settlement scrapers, digesters and odour plant — built to hold water before they ever treat it.
- Sewage Pumping Stations & CSOs — The deep wet wells, pumps and overflow structures that keep flat networks moving — built watertight, commissioned against live flows, and expected to run unmanned for decades.
- Utility Tunnels & Pipe Jacking — No-dig sewer and utility installation — microtunnels and pipe jacks driven between shafts to millimetre accuracy under roads, railways and rivers the city cannot afford to open.
Shared methods used in Wastewater & Sewerage
- Corridor Access & Enabling Works
- Survey Control & Ground Investigation
- Bulk Earthworks — Cuttings & Embankments
- Drainage & Utility Corridors
- Dewatering & Groundwater Control
- Shafts & Portals
- TBM Tunnelling & Segmental Lining
- Concrete Frame Construction
- Testing, Commissioning & Asset Handover
Part of the Utilities & Energy group.