Lake Manchester Dam
| Lake Manchester Dam | |
|---|---|
 Location of the Lake Manchester Dam
in Queensland |
|
| Country | Australia |
| Location | South East Queensland |
| Coordinates | 27°29′17″S 152°45′5″E / 27.48806°S 152.75139°ECoordinates: 27°29′17″S 152°45′5″E / 27.48806°S 152.75139°E |
| Purpose | |
| Status | Operational |
| Construction began | 1912 |
| Opening date |
|
| Operator(s) | SEQ Water |
| Dam and spillways | |
| Type of dam | Gravity dam |
| Impounds | Cabbage Tree Creek |
| Height | 38 m (125 ft) |
| Length | 277 m (909 ft) |
| Dam volume | 45×103 m3 (1.6×106 cu ft) |
| Spillway type | Uncontrolled |
| Spillway capacity | 450 m3/s (16,000 cu ft/s) |
| Reservoir | |
| Creates | Lake Manchester |
| Total capacity | 26,000 ML (5.7×109 imp gal; 6.9×109 US gal) |
| Catchment area | 74 km2 (29 sq mi) |
| Surface area | 318 ha (790 acres) |
|
Website www |
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The Lake Manchester Dam is a concrete gravity dam with an un-gated spillway across the Cabbage Tree Creek that is located in the South East region of Queensland, Australia. The main purpose of the dam is for potable water supply of Brisbane. The impounded reservoir is called Lake Manchester.
The dam is located in the area surrounding the suburb of the same name, approximately 15 kilometres (9.3 mi) north of Ipswich. The primary inflow of the reservoir is the Cabbage Tree Creek, not far above its confluence with the Brisbane River. Its original purpose was to supplement supplies when the flow of the Brisbane River was low. Today it is one of a number of dams connected to the South East Queensland Water Grid.
The concrete dam structure is 38 metres (125 ft) high and 227 metres (745 ft) long. The 45-thousand-cubic-metre (1.6×106 cu ft) dam wall holds back the 26,000-megalitre (5.7×109 imp gal; 6.9×109 US gal) reservoir when at full capacity. From a catchment area of 74 square kilometres (29 sq mi) that includes much of the western slopes of the D'Aguilar Range, the dam creates Lake Manchester, with a surface area of 318 hectares (790 acres). The uncontrolled un-gated spillway has a discharge capacity of 450 cubic metres per second (16,000 cu ft/s). Initially managed by the Metropolitan Water Supply and Sewerage Board, and then the Brisbane City Council, management of the dam was transferred to Seqwater in July 2008.
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