Splityard Creek Dam

Splityard Creek Dam
Location of the Splityard Creek Dam in Queensland
Country	Australia
Location	South East Queensland
Coordinates	27°22′16″S 152°38′13″E / 27.37111°S 152.63694°E / -27.37111; 152.63694Coordinates: 27°22′16″S 152°38′13″E / 27.37111°S 152.63694°E / -27.37111; 152.63694
Purpose	Hydroelectricity
Status	Operational
Construction began	1977 (1977)
Opening date	1980 (1980)
Dam and spillways
Type of dam	Embankment dam
Impounds	Pryde Creek
Height	76 m (249 ft)
Length	1,140 m (3,740 ft)
Dam volume	69×10^3 m3 (2.4×10^6 cu ft)
Spillway type	Uncontrolled
Spillway capacity	570 m3/s (20,000 cu ft/s)
Reservoir
Total capacity	28,700 ML (6,300×10^6 imp gal; 7,600×10^6 US gal)
Catchment area	3.8 km2 (1.5 sq mi)
Surface area	105 ha (260 acres)
Maximum width	294 m (965 ft)
Power station
Name	Wivenhoe Power Station
Operator(s)	CS Energy
Commission date	1984 (1984)
Type	Pumped-storage
Turbines	2
Installed capacity	500 megawatts (670,000 hp)
Website Wivenhoe Power Station

The Splityard Creek Dam is a rock and earth-fill embankment dam with an un-gated spillway across the Pryde Creek that is located in the South East region of Queensland, Australia. The sole purpose of the dam are for the generation of hydroelectricity. The impounded reservoir is called the Splityard Creek Reservoir.

The dam is located 30 kilometres (19 mi) northwest of Ipswich in the Somerset Region and forms the upper reservoir for the Wivenhoe Power Station.

Construction commenced in 1977 and was completed in 1980 by contractors Thiess Brothers and John Holland. The rock and earthfill dam structure is 76 metres (249 ft) high and 1,140 metres (3,740 ft) long. The 3,371-thousand-cubic-metre (119.0×10^⁶ cu ft) dam wall holds back the 28,600-megalitre (6,300×10^⁶ imp gal; 7,600×10^⁶ US gal) reservoir when at full capacity. From a catchment area of 3.8 square kilometres (1.5 sq mi), the dam creates an unnamed reservoir, with a surface area of 102 hectares (250 acres). The uncontrolled un-gated spillway has a discharge capacity of 570 cubic metres per second (20,000 cu ft/s). Initially managed by the Sunshine Coast Regional Council, management of the dam was transferred to Seqwater in July 2008.