A new slipway at Hubberts Bridge will help link Lincoln to other nearby cathedral cities by water.
The new slipway, located next to the Wheatsheaf public house off the B1192, is 3.7 metres wide and is the first point of access into the tidal navigation from The Haven for small craft upstream of Black Sluice Lock.
A coin-operated pump-out facility has also been installed on the adjacent mooring.
The slipway, which aims to boost tourism, was funded by the European Regional Development Fund as part of the Lincolnshire Waterways: Routes Not Barriers project, which gained £1 million funding.
Councillor Colin Davie, Executive Member for Economic Development, said: “Tourism is a key sector for this part of the county, and we want to make our waterways as attractive to visitors as possible.
“And this is an important step towards providing a link between the cathedral cities of Lincoln, Peterborough and Ely that also incorporates the market towns of Boston, Spalding, Crowland and Ramsey.
“It will be followed later this year by the Black Sluice Multi-User Trail, which will create a route for walkers and cyclists along the south bank of the drain between Hubberts Bridge and Wyberton High Bridge.
“And hopefully these improvements will bring more visitors to the area and a boost for local businesses.”
The works were carried out by John Martin Hoyes, with support from Lincolnshire Waterways Partnership, the Environment Agency and the European Regional Development Fund.