A8 Greenock Flood Alleviation Investment
Scottish Water is investing £2.5 million in a project to address regular flooding of the A8 through Greenock.
We are installing a new screened Combined Sewer Overflow (CSO) beneath Inverclyde Council's Pottery Street depot and upgrading the local sewer network.
Work started on the CSO in early January 2023 and the project is expected to take 11 months to complete.
At a Glance
Flood alleviation project
£2.5 million investment
Duration - 11 months
Delivered by Caledonia Water Alliance (CWA)
A8 Greenock Flood Alleviation Project
The A8 East Hamilton Street is the main route into Greenock from the east
What We Are Doing
We are installing a new screened Combined Sewer Overflow (CSO) under land occupied by Inverclyde Council's Pottery Street Roads Depot.
This will increase capacity of the local sewer network during periods of heavy rainfall and when necessary allow screened waste water to discharge into the Lady Burn rather than flood the road.
Once the new CSO has been constructed, work will move onto the A8 - East Hamilton Street - to upgrade and connect new sewer pipes. A system of contraflows will be used to minimise delays.
This work is being delivered by our alliance partner Caledonia Water Alliance (CWA) on our behalf.
The Project Explained
Watch our short animation explaining the work and traffic management arrangements
Why We Are Doing It
The A8 East Hamilton Street is prone to regular flooding during periods of extreme weather affecting commuters, road users, local businesses and the local economy.
We are investing £2.5million on a project that should dramatically reduce the chance of the road flooding.
The A8 floods regularly during periods of extreme weather
The new screened CSO has been built under the council depot
Update June 2023
The main project has moved out onto the carriageway. From Monday 26 June 2023 a contraflow has been established to allow the diversion of existing utilities and connection of the new screened CSO to the upgraded sewer network.
This phase of the project is expected to last approximately five and a half months.
Traffic has been reduced to one lane in each direction
A new outfall into the Lady Burn has been built