Wienerwaldsee

Wienerwaldsee, Lake, Lower Austria, alt. 289 m (barrage), 1.4 km long and 0.8 km wide, reservoir of the River Wien on the Westautobahn motorway, between Pressbaum and Untertullnerbach; it is also fed by the Wolfsgrabenbach stream. Wiental valley water works to the northeast of the lake, feeding the Wiental valley water pipeline.