Plattensee, Reservoir about 840 meters west and upstream of the Zweribach waterfalls in the Middle Black Forest natural region.

The Plattensee is a reservoir about 840 metres west and upstream of the Zweribach waterfalls in the Middle Black Forest. It dams the Zweribach and a smaller tributary, the Harzmoosbach. The lake lies mainly in the municipality of Simonswald, with its southern part in St. Peter; the outflow pipe runs northeast to the Zweribachwerk power station in the Obertal hamlet of Simonswald.

The Plattensee was built in 1924 as the upper basin of the Zweribachwerk, a small hydroelectric plant near the Zinken Obertal of Simonswald. It dams the Zweribach and the smaller Harzmoosbach; the outflow pipe runs northeast to the power station, and the water then reaches the Wilde Gutach more than a kilometre below the Zweribach falls.

The lake lies in the Zinken Obertal above Simonswald, and its outflow pipe runs northeast to the Zweribachwerk power station in the valley. The reservoir is fed by the Zweribach and by the smaller Harzmoosbach, whose name appears on local maps of the area.

The reservoir lies about 840 metres west and upstream of the Zweribach waterfalls, in the Mittlerer Schwarzwald above the Zinken Obertal of Simonswald. The outflow pipe runs northeast to the Zweribachwerk power station; the dammed Zweribach reaches the Wilde Gutach a good two kilometres further east. The lake straddles Simonswald (Emmendingen district) and, in its southern part, St. Peter (Breisgau-Hochschwarzwald).

The lake lies about 840 metres west of, and upstream from, the Zweribach waterfalls. Its outflow pipe runs northeast to the Zweribachwerk power station in the Obertal hamlet of Simonswald, and that water reaches the Wilde Gutach more than a kilometre below the Zweribach confluence.