Chichester Dam
| Chichester Dam | |
|---|---|
 Location of Chichester Dam in
New South Wales |
|
| Country | Australia |
| Location | Dungog, New South Wales |
| Coordinates | 32°13′54″S 151°41′04″E / 32.23167°S 151.68444°ECoordinates: 32°13′54″S 151°41′04″E / 32.23167°S 151.68444°E |
| Purpose | Water supply |
| Status | Operational |
| Construction began | 1917 |
| Opening date | 1926 |
| Construction cost | A£1,049,000 |
| Owner(s) | Hunter Water Corporation |
| Dam and spillways | |
| Type of dam | Gravity dam |
| Impounds | Chichester River, Wangat River |
| Height | 43 m (141 ft) |
| Length | 254 m (833 ft) |
| Dam volume | 91 m3 (3,200 cu ft) |
| Spillway capacity | 3,300 m3/s (120,000 cu ft/s) |
| Reservoir | |
| Creates | Lake Chichester |
| Total capacity | 21,500 ML (760×106 cu ft) |
| Catchment area | 197 km2 (76 sq mi) |
| Surface area | 1.8 km2 (0.69 sq mi) |
| Maximum length | 4.22 km (2.62 mi) |
| Maximum width | 580 m (1,900 ft) |
| Normal elevation | 156.2 m (512 ft) AHD |
| Power station | |
| Operator(s) | Delta Electricity |
| Commission date | November 2001 |
| Type | Conventional |
| Turbines | 1 |
| Installed capacity | 110 kW (150 hp) |
| Annual generation | 0.4 GWh (1.4 TJ) |
|
Website Chichester Dam at www.hunterwater.com.au |
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Chichester Dam is a minor concrete gravity dam across the Chichester and Wangat rivers, upstream of Dungog, in the Hunter Region of New South Wales, Australia. The dam's main purpose is water supply for the Lower Hunter region. A mini hydro-electric power station operates at times of peak flow and is connected to the national grid. The impounded reservoir is Lake Chichester.
Commenced in 1917 and completed in 1926, the Chichester Dam is a minor dam on the Chichester River, a tributary of the Williams River, approximately 21.6 km (13.4 mi) north of Dungog. The dam contributes about thirty-five percent of the lower Hunter region's water supply.
The dam wall is 43 m (141 ft) high and is 254 m (833 ft) long and was constructed using a cyclopean system of interlocking concrete blocks and large boulders with a volume of 91 m3 (3,200 cu ft). The wall is anchored to the bedrock below it by 93 stressed tendons. At 100% capacity the dam wall holds back 21,500 ML (760×106 cu ft) of water at 156.2 m (512 ft) AHD. The spillway is capable of discharging 3,300 m3/s (120,000 cu ft/s). The surface area of the reservoir is 1.8 km2 (0.69 sq mi) and the catchment area, largely located within the Barrington Tops National Park, is 197 km2 (76 sq mi). The dam is connected to reservoirs in Maitland, Cessnock and Newcastle by an 80 km (50 mi) long gravitation main.
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