| Happy Valley Reservoir | |
|---|---|
 Aerial view of Happy Valley Reservoir in early 2007 | |
  Location of Happy Valley Reservoir in South Australia  Happy Valley Reservoir (Greater Adelaide) | |
| Country | Australia |
| Location | Happy Valley, South Australia |
| Coordinates | 35°04′23″S 138°34′19″E / 35.073°S 138.572°E |
| Purpose | Reservoir |
| Construction began | 1892 |
| Opening date | 1897 |
| Construction cost | A$1.8 million |
| Dam and spillways | |
| Type of dam | Earth with clay core |
| Height | 23.6 metres (77 ft) |
| Length | 1,155 metres (3,789 ft) |
| Reservoir | |
| Total capacity | 11.5 gigalitres (410,000,000 cu ft) |
| Surface area | 1.88 km2 (0.73 sq mi) |
The Happy Valley Reservoir is a water reservoir located in the southern Adelaide suburb of Happy Valley, South Australia. Constructed when the total population of Adelaide numbered 315,200 (1893 census), the Happy Valley Reservoir now supplies over half a million people, from Adelaide's southern extent to the city centre.[1] The surrounding area is home to much wildlife, including many kangaroos.