Lake Margaret (Tasmania)
Lake Margaret is a concrete-faced gravity dam with an uncontrolled spillway across the Yolande River, located on the north side of Mount Sedgwick, in the West Coast Range, West Coast of Tasmania, Australia.
| Lake Margaret | |
|---|---|
Location in Tasmania | |
| Country | Australia |
| Location | West Coast, Tasmania |
| Coordinates | 41°59′30.3″S 145°35′15″E |
| Purpose | Power |
| Status | Operational |
| Opening date | 1918 |
| Built by | Mount Lyell Mining and Railway Company |
| Owner(s) | Hydro Tasmania |
| Dam and spillways | |
| Type of dam | Gravity dam |
| Impounds | Yolande River |
| Height (foundation) | 17 m (56 ft) |
| Length | 243 m (797 ft) |
| Dam volume | 6,000 m3 (210,000 cu ft) |
| Spillways | 1 |
| Spillway type | Uncontrolled |
| Spillway capacity | 29 m3/s (1,000 cu ft/s) |
| Reservoir | |
| Creates | Lake Margaret |
| Catchment area | 21 km2 (8.1 sq mi) |
| Surface area | 170 ha (420 acres) |
| Normal elevation | 660 m (2,170 ft) AHD |
| Lake Margaret Power Station | |
| Operator(s) | Hydro Tasmania |
| Commission date |
|
| Decommission date |
|
| Type | Conventional |
| Turbines |
|
| Installed capacity |
|
| Annual generation | 48 GWh (170 TJ) |
The impounded reservoir is also called Lake Margaret.
The dam was constructed in 1918 by the Mount Lyell Mining and Railway Company for the purpose of generating hydro-electric power via the Lake Margaret Power Station, which is located below the dam wall. Following the closure of the Mount Lyell Mining and Railway Company, in 1985 the control of the dam, lake, and power station was transferred to Hydro Tasmania.
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