Staustufe Detzem, Barrage on the Moselle in Detzem, Germany

The Staustufe Detzem is a barrage on the Moselle between the Trier and Wintrich barrages, near Detzem in Rhineland-Palatinate. It has the largest drop of any Moselle barrage at 9 metres and the longest impoundment at 29 kilometres, and is the only one with its own lock canal. The ship lock measures 170 by 12 metres at kilometre 166.18; the boat lock at the weir measures 18 by 3.3 metres.

The Detzem barrage was commissioned in 1964 and is managed by the Wasserstraßen- und Schifffahrtsamt Mosel-Saar-Lahn. It lies between the Trier and Wintrich barrages; its impoundment reaches back to about the height of Trier's Quint district. The adjacent run-of-river power station dates from 1962 and is operated by RWE Generation Hydro.

The barrage gives its name to the Detzem lock site on the Moselle, where the shipping lock sits at kilometre 166.18 and a separate small-boat lock at 166.85. Its 29-kilometre impoundment reaches upstream to around the Trier district of Quint, so river traffic and anglers along that stretch work with its water levels.

The barrage lies between the Trier and Wintrich locks, with the ship lock at Mosel-km 166.18 and the smaller boat lock at the weir at Mosel-km 166.85. The backed-up water reaches roughly as far as Trier's Quint district, so the two locks are far apart and best reached separately.

The power plant generates about 24 megawatts of electricity from the flowing water. A special fish ladder allows fish to move past the barrage and access their natural habitats upstream.