Ewens Ponds
Ewens Ponds is a series of three water-filled limestone sinkholes in the Australian state of South Australia located in the gazetted locality of Eight Mile Creek, on the watercourse of Eight Mile Creek about 25 kilometres (16 miles) south of Mount Gambier and 8.4 kilometres (5.2 miles) east of Port Macdonnell. The ponds are popular with recreational divers due to underwater visibility of up to 80 metres (260 feet). It has a large fish population including the endangered golden pygmy perch. Ewens Ponds has been part of the Ewens Ponds Conservation Park since 1976.
| Ewens Ponds | |
|---|---|
Ewens Ponds, ca. 1945 | |
Ewens Ponds Location in South Australia | |
| Location | South Australia |
| Coordinates | 38°01′36″S 140°47′26″E |
| Type | Cenotes |
| Primary outflows | Eight Mile Creek |
| Catchment area | spring-fed water body |
| Basin countries | Australia |
| Max. length | Pond 1 - 50 metres (160 feet) Pond 2 - 38 metres (125 feet) Pond 3 - 19 metres (62 feet) |
| Max. width | Pond 1 - 32 metres (105 feet) Pond 2 - 38 metres (125 feet) Pond 3 - 28 metres (92 feet) |
| Average depth | Pond 1 - 9 metres (30 feet) Pond 2 - 9 metres (30 feet) Pond 3 - 13 metres (43 feet) |
| Max. depth | 13 metres (43 feet) |
| Water volume | Pond 1 - 28,000 cubic metres (990,000 cubic feet) Pond 2 - 212,000 cubic metres (7,500,000 cubic feet) Pond 3 - 4,400 cubic metres (160,000 cubic feet) |
| Residence time | Pond 1 - 6 hours Pond 2 - 3 hours Pond 3 - 1.5 hours |
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