The Lower Saxony Water Management, Coastal Defence and Nature Conservation Agency (NLWKN) has ambitious plans for the renovation of the lock. As part of the renovation work, the chamber walls will be raised and the lock gates renewed. In addition, the lock staff's control stand will be relocated to give them a better overview. A new visitor platform is also to be installed. In addition to the repairs to the lock itself, the bascule bridge over the lock is also to be renewed.
The renovation of the lock is a direct consequence of the major dyke construction work. These were necessary to protect the coast against storm surges and rising sea levels. The total investment is expected to be around 12.5 million euros.
In addition to the museum harbour in Carolinensiel, which is home to many historic boats the yacht club in Harlesiel is also affected. In the course of the lock closure, access to the inland harbours is completely blocked. This affects all berth holders and guest berth holders whose ships are behind the lock.
Thanks to the NLWKN's early communication, most berth holders in the inland ports were able to react in good time. Owners who were looking for a new berth have also found one for the 2026 season. Some of those affected used the forced break to store their ships on land and carry out necessary repairs or to spend the next summer in the harbour in Harlesiel.
Guest sailors will have to use the outer harbour until 2027. As this is subject to the tides and the protective inland harbour is not accessible, it can get choppy there, especially in northerly winds.