Work has started on a £190,000 Environment Agency Wales project to upgrade the automated control system which protects Llandudno Junction in north Wales from flooding.
The work will replace the existing system which controls the flow of water from the Afon Wydden into the Conwy estuary and protects 229 properties from flooding.
Controlling flooding on the Wydden relies on a complicated system of four reservoirs which act as flood storage areas. Water levels along the river are monitored and maintained at a safe level by sluice gates which are controlled by the Wydden Flood Storage Area computer.
The revamp will take between four and six weeks to complete.