Trausnitz Reservoir, reservoir in Germany

Trausnitz Reservoir is the impoundment of the Pfreimd near Trausnitz in Bavaria's Schwandorf district, held back by a concrete gravity dam built in 1951–1952. The dam's air side and powerhouse are clad in granite masonry, and three fish-belly weir flaps on top make it look more like a large weir than a dam. A smaller pre-dam sits upstream.

The dam was built in 1951 and completed in 1952 to regulate water flow in the region. Since its construction, the reservoir has served for electricity generation, flood prevention, and water storage for the local community.

The reservoir is named after Trausnitz, the village on the Pfreimd where it lies. Its dam is a concrete gravity structure whose downstream face and powerhouse are clad in granite masonry, and three fish-belly weir flaps sit on top, so the barrier reads more like a large weir than a dam wall. A smaller upstream forebay dam belongs to the same scheme.

The dam stands near Trausnitz in the Pfreimd valley, and the reservoir works as the lower basin of the Jansen pumped-storage group, so water levels can shift with power generation. The barrier is a concrete gravity dam faced with granite masonry, with three fish-belly weir flaps on top, and a smaller pre-dam sits upstream. Look for the granite-clad powerhouse at the dam.

The dam's own run-of-river power station houses two Kaplan turbines with a combined output of 1.84 MW, producing about 3.83 GWh a year at a mean head of 10.65 m. The plant is part of the Jansen pumped-storage group, for which the reservoir acts as lower and equalising basin.