Parts of the upper Calder Valley now have five times more protection against flooding after completion of a major construction scheme.
The Environment Agency (EA) and contractors Volker Stevin have completed the £13m third phase of the Todmorden flood alleviation scheme.
The project has seen significant engineering work carried out at several key sites around Todmorden over the past two-and-a-half years.
Culmination of the work means the town is now protected against a one-in-25 year flood, compared to a one-in-five year event before the project began.
Alan Whittaker, of the EA, said: “We can’t guarantee that there will never be any flooding, but the frequency of the event and the severity of it is certainly lower than it was three years ago.”
Coun Barry Collins, Calderdale Council’s cabinet member for economy and environment, said: “I think this has been a brilliant piece of work and it’s congratulations to everybody involved.
“As a result of this, Todmorden will be safer and it will ensure its prosperity for years to come.”