Linden harbour lock, Listed lock in Hannover-Limmer, Germany

Linden harbour lock is a lock structure in Hannover-Limmer that allows boats to move between different water levels on the canal system. The building features sturdy stone walls and large metal gates that carefully control water flow and enable safe passage.

The lock was built during the First World War, in 1916–1917, to bridge the 7.80-metre difference between the branch canal and the higher basin of Linden harbour. The Braunschweig waterways authority gives a construction period of 1914 to 1917 and a difference of 7.70 metres. Its 85-metre chamber was sized for the 67-metre barges of the day, and a planned enlargement of canal and lock is now considered unlikely.

The lock takes its name from the Lindener Hafen it serves, though it stands in Limmer, not Linden. The street along its northern side was renamed Zum Schleusengrund in 2003, following the old country road to Harenberg. The structure is a protected architectural heritage monument.

The lock lies in Limmer, in the triangle between Sichelstraße near the Limmerbrunnen and the continuation of Harenberger Straße, which was named Zum Schleusengrund in 2003 along the old road to Harenberg. The chamber measures 85 m by 10 m, so passing boats are small; Europaschiffe of 85 m need special permission. Larger motor cargo ships and push barges cannot enter the Lindener Hafen at all.

The lock chamber measures 85 metres by 10 metres, sized for the 67-metre barges of its era. Modern large motor freighters and push convoys are too big for it, so they cannot reach Linden harbour at all; Europaschiffe of 85 metres pass only with a special permit. A planned enlargement of the branch canal and lock is now considered unlikely.