Ranna#

Ranna, Upper Austria, northern tributary of the River Danube in the western part of the Muehlviertel region; source near Sonnen (Bavaria), formed by the confluence of many streams, enters Austrian territory near Oberkappel (alt. 511 m) and flows into the Danube near Rannamuehle (alt. 285 m). The long Ranna reservoir is situated south of the state border. A pressure tunnel leads from the reservoir to Ranna power plant (opened in 1925, 19 MW) located on the northern bank of the River Danube.