The Canal and River Trust have replaced a set of lock gates at Seabrook Lock near Cheddington.
Repairs have also been taking place to the lock walls along the canal.
A Canal and River Trust spokesman said: “Each of the lock gates weigh several tonnes each and are hand made by oak at our workshop in the Midlands.
“Each of the lock gates are made to measure to ensure they fit snugly in the lock and help prevent water leaking through the gates.”
On average, lock gates are replaced every 25 years with the latest works as part of a £43 million project to replace and repair lock gates across the waterways.