| Cascade | |
| Pushpin Map: | Australia Tasmania |
| Pushpin Map Caption: | Location of the Cascade River mouth in Tasmania |
| Subdivision Type1: | Country |
| Subdivision Name1: | Australia |
| Subdivision Type2: | State |
| Subdivision Name2: | Tasmania |
| Subdivision Type3: | Region |
| Subdivision Name3: | North-east |
| Length: | 10km (10miles) |
| Source1 Location: | below Bells Hill |
| Source1 Coordinates: | -41.2486°N 147.8578°W |
| Source1 Elevation: | 515m (1,690feet) |
| Mouth: | Ringarooma River |
| Mouth Coordinates: | -41.1492°N 147.805°W |
| Mouth Elevation: | 148m (486feet) |
| River System: | Ringarooma River catchment |
| Extra: | [1] |
The Cascade River, part of the Ringarooma River catchment, is a perennial river located in the north-east region of Tasmania, Australia.
The river rises below Bells Hill and flows generally north by west, through the Cascade Dam, and reaches its mouth near Derby where it merges with the Ringarooma River. The river descends over its 10km (10miles) course.[1]
The river flooded in April 1929, following unusually heavy rains in northern Tasmania.[2] After rainfall of in ninety minutes,[3] the Briseis Dam gave way upstream of Derby, causing a torrent of water to rush down the narrow gorge of the Cascade River. At the time, the flood was the worst in Tasmanian history, lasting several days. Thousands of buildings were damaged and the death toll is variously reported to be between 14 and 22.[4] After the 1929 Briseis Dam Disaster, a dam across the Cascade River was rebuilt in 1936 as the 49ha Cascade Dam.[5]