Structural engineering
2.5% to 4% of construction value
Corvane EngineeringPage B4Yaba, Lagos
Section B · Water and drainage
Water and drainage
Clean water in and storm water out. We design treatment works, reservoirs, mains and the drainage that keeps Lagos streets passable in July.
An aerial view of circular treatment tanks. Example photo.
What we do
- Water treatment and pumping stations
- Reservoirs, water towers and trunk mains
- Storm drainage and flood modelling
- Wastewater pre-treatment for factories
- Rainwater harvesting for buildings
How it works
- DataRainfall records, levels survey and catchment mapping.
- ModelHydraulic models of the network for today and for growth.
- DesignChannels, culverts, pumps and tanks sized with honest margins.
- HandoverOperation and maintenance manuals and training for the operator.
From the project map
Recent work in water
- Ikorodu water works upgradeIkorodu, Lagos · 2025 · CompletedNew clarifiers, a 12 megalitre reservoir and 9 km of trunk mains serving about 180,000 people.
- Lekki drainage corridorLekki, Lagos · 2026 · On siteA 6 km lined channel and three outfalls sized for the 1 in 25 year storm.
- Jos water reservoirJos, Plateau · 2023 · CompletedSpillway upgrade and a new draw-off tower for a 1960s reservoir.
Pictures from site
Questions from readers
What storm do you design for?
Usually the 1 in 10 year storm for estate drains and 1 in 25 or more for main channels, agreed with you and the authority.
Can you fix an estate that floods?
Yes. We start with a flood survey and a simple model, then propose the cheapest set of fixes first.
Also in Section B
Notice
Talk to a water engineer.
A free first meeting and site visit within a week, then a written fee proposal.