Although the Altitude given is 812m, it doesn't seem that high, and 812m is exactly 100m above lake level, which is a little suspicious. If you accept instead the phrase "climb 70m higher" in the original kataster description, the altitude comes out about 780 to 785m, which puts the final sump at almost exactly the level of the lake.
Entrance | View from entrance towards Altaussee | Entrance in 2006 after 9 days' straight rain |
Photos © Mark Shinwell 2005 (1,2) + Dave Loeffler 2006 (3).