Its total length, including the Türnitzer Traisen, is 82.6 km (51.3 mi).

[1] It is a tributary of the Danube in the Lower Austrian region of Mostviertel.

In the course of building the Danube power station Altenwörth [ceb; de; no; sv; uk], the mouth of the Traisen was relocated to Altenwörth [bar; de] in the municipality of Kirchberg am Wagram.

During a period of extremely high water in July 1997, parts of numerous municipalities along the Traisen, as well as the government quarter of the state capital St. Pölten, were greatly flooded.

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