Kraftwerk auf der Töll, Hydroelectric power plant in Algund, South Tyrol

Kraftwerk auf der Töll is a run-of-river plant in the upper part of Forst, a hamlet of Algund near Meran. Two gates 7 m wide and 5.5 m high dam the Etsch at the Töll; an open channel on the orographic right leads to a roughly 500 m tunnel in Marlinger Berg, ending in a sand-removal chamber with a concrete pressure shaft down to the machine hall. Its catchment covers 1675 km² of the Ötztal Alps and Ortler group.

Built 1896–1898 for the Etschwerke, the joint utility of Bozen and Meran, the plant was planned and supervised by Oskar von Miller; Ganz & Cie of Budapest supplied the electromechanical equipment. It opened with four Girard turbines of 0.74 MW each, and two more turbine-generator sets were added soon after as demand rose. In 1904 a rebuild brought output to 8.1 MW and diversion from 9 to 15 m³/s.

The plant's name comes from the Töll, the spot at the lower end of the Vinschgau where the Etsch is dammed by two gates 7 m wide and 5.5 m high. The site is a protected monument since 1987, and its 1896–1898 machine hall, built by Musch & Lun of Meran, still stands. Since 2016 the plant has been run remotely from Alperia's control centre in Kardaun, with no staff on site.

The plant stands in the upper part of the Forst district of Algund, north of Meran. The water is taken from the Etsch at the Töll, at the lower end of the Vinschgau, and led through an open channel and a roughly 500 m tunnel in the Marlinger Berg. The machine hall and the 1904 annex are visible from outside; the site is not generally open for interior visits.

During the 1995–1997 overhaul the connecting wing added in 1926 between the machine hall and the 1904 extension was demolished, restoring the building's original outline. The work also raised the design flow to 46 m³/s and replaced the turbines and generators, after which the staff was withdrawn and the plant was run remotely from Naturns.