Split Rock Dam | |
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Location of the Split Rock Dam in New South Wales | |
Country | Australia |
Location | North West Slopes, New South Wales |
Coordinates | 30°32′S150°42′E / 30.533°S 150.700°E Coordinates: 30°32′S150°42′E / 30.533°S 150.700°E |
Status | Operational |
Construction began | 1984 |
Opening date | 1987 |
Owner(s) | State Water Corporation |
Dam and spillways | |
Type of dam | Embankment dam |
Impounds | Manilla River |
Height | 66 metres (217 ft) |
Length | 484 metres (1,588 ft) |
Dam volume | 1,048 cubic metres (37,000 cu ft) |
Spillways | 1 |
Spillway type | Ungated concrete chute |
Spillway capacity | 6,860 cubic metres per second (242,000 cu ft/s) |
Reservoir | |
Creates | Split Rock Reservoir |
Total capacity | 397,370 megalitres (14,033×10 6 cu ft) |
Catchment area | 1,650 square kilometres (640 sq mi) |
Surface area | 2,150 hectares (5,300 acres) |
Maximum water depth | 52 metres (171 ft) |
Normal elevation | 449 metres (1,473 ft) AHD |
Website Split Rock Dam |
Split Rock Dam is a minor ungated concrete faced rock fill embankment dam with concrete chute spillway across the Manilla River upstream of Manilla in the north-western slopes region of New South Wales, Australia. The dam's purpose includes flood mitigation, irrigation, water supply and conservation. The impounded reservoir is called Split Rock Reservoir.
Commenced in 1984, completed in 1987, and upgraded in 2012, the Split Rock Dam is a minor dam on the Manilla River, located approximately 28 kilometres (17 mi) upstream, north of Manilla and 70 kilometres (43 mi) north of Tamworth, accessed by a turnoff from Fossickers Way. The dam was built by Abignano Pty Limited on behalf of the New South Wales Department of Land and Water Conservation to supply water for irrigation, flood mitigation and potable water for towns in the Namoi Valley, including Manilla and Barraba. [1] [2] [3] Together with Keepit Dam, Split Rock Dam supplies extensive irrigation water in the Namoi Valley. The dams also supply water for the town of Walgett and generates hydro-power for the national grid. [1]
The dam wall constructed with 1,048 cubic metres (37,000 cu ft) of concrete faced rockfill is 66 metres (217 ft) high and 484 metres (1,588 ft) long. The maximum water depth is 52 metres (171 ft) and at 100% capacity the dam wall holds back 397,370 megalitres (14,033×10 6 cu ft) of water at 449 metres (1,473 ft) AHD. The surface area of Split Rock Reservoir is 2,150 hectares (5,300 acres) and the catchment area is 1,650 square kilometres (640 sq mi), mostly from the Upper Manilla and Ironbark Creeks plus small creeks and gullies, too, including Crow Mountain and Eumur Creeks. [4] The concrete chute spillway is capable of discharging 6,860 cubic metres per second (242,000 cu ft/s). [1] [2] [3] An A$8.1 million upgrade of facilities was completed during 2012 and involved construction of a new, 2 metres (6 ft 7 in) high, concrete parapet wall on the embankment. [5]
At the time of its initial construction in 1987, Split Rock Dam incorporated the latest dam technology with an intake tower that can select water from any specified depth. This ensures that cold, de-oxygenated water from lower levels is mixed with water that contains more oxygen from the warmer layers above, before it leaves the storage. [1]
In 2013, Tamworth Regional Council announced a project to construct a 28 kilometres (17 mi) pipeline from Split Rock Dam to Barraba to ensure local residents have access to a quality water supply would proceed. Additional project infrastructure includes a pumping station near the dam, a pressure tank, and upgrades to Barrabra water treatment plant. [6] [7]
The dam is named after a fissure in a large rock near the dam site. [1]
The reservoir has recreational opportunities including camping areas and facilities for launching ski boats and sailing boats. There are toilet, barbecue, picnic, and camping facilities as well as a boat ramp. Boat access is restricted near the dam wall. The reservoir contains fish species such as Murray cod, golden perch, silver perch, eel-tailed catfish and carp. [1]
On the reservoir's northern shore is Glen Riddle Recreation Reserve, a 14 hectares (35 acres) nature reserve with toilets, picnic and camping facilities.
Glenbawn Dam is a major ungated earth and rock fill with clay core embankment dam with concrete chute spillway plus fuse plugs across the Hunter River upstream of Aberdeen in the Hunter region of New South Wales, Australia. The dam's purpose includes flood mitigation, hydro-electric power, irrigation, water supply and conservation. The impounded reservoir is called Lake Glenbawn.
Keepit Dam is a major gated mass concrete gravity dam with an earth fill abutment and a central gated concrete overflow crest and six radial gate spillways across the Namoi River upstream of its junction with the Peel River in the North West Slopes region of New South Wales, Australia. The dam's purpose includes flood mitigation, hydro-power, irrigation, water supply and conservation. The impounded reservoir is called Lake Keepit.
Wyangala Dam is a major gated rock fill with clay core embankment and gravity dam with eight radial gates and a concrete chute spillway across the Lachlan River, located in the south-western slopes region of New South Wales, Australia. The dam's purpose includes flood mitigation, hydro-power, irrigation, water supply and conservation. The impounded reservoir is called Lake Wyangala.
Burrendong Dam is a rock-fill embankment major gated dam with a clay core across the Macquarie River upstream of Wellington in the central west region of New South Wales, Australia. The dam's purpose includes flood mitigation, irrigation, water supply and hydro-electric power generation. The dam impounds Lake Burrendong and is filled by the waters from the Macquarie, and Cudgegong rivers as well as Meroo Creek.
Glennies Creek Dam is a minor ungated concrete faced curved earth and rockfill embankment dam with an uncontrolled rock cut spillway across the Glennies Creek, upstream of Singleton, in the Hunter region of New South Wales, Australia. The dam's purpose includes flood mitigation, irrigation, water supply and conservation. The impounded reservoir is called Lake Saint Clair.
Copeton Dam is a major clay core and rock fill embankment dam with nine radial gates and a gated concrete chute spillway across the Gwydir River upstream of Bingara in the New England region of New South Wales, Australia. The dam's purpose includes environmental flows, hydro-electric power generation, irrigation, and water supply. The impounded reservoir is called Lake Copeton.
Lostock Dam is a minor rockfill and clay core embankment dam with a concrete lined, flip bucket spillway across the Paterson River upstream of the village of East Gresford in the Hunter region of New South Wales, Australia. The dam's purpose includes flood mitigation, irrigation, water supply and conservation. Mini hydro-power facilities were retrofitted in 2010. The impounded reservoir is also called Lostock Dam.
Windamere Dam is a minor ungated rock fill with clay core embankment dam with an uncontrolled unlined rock cutting spillway across the Cudgegong River at Cudgegong in the Mid-Western Region Council, New South Wales, Australia. It is upstream of Mudgee in the Central Tablelands region. The dam's purpose includes hydro-power, irrigation, water supply, and conservation. The impounded reservoir is called Lake Windamere.
The Blowering Dam is a major ungated rock fill with clay core embankment dam with concrete chute spillway impounding a reservoir under the same name. It is located on the Tumut River upstream of Tumut in the Snowy Mountains region of New South Wales, Australia. Purposes for the dam include flood mitigation, hydro-power, irrigation, water supply and conservation. The dam is part of the Snowy Mountains Scheme, a vast hydroelectricity and irrigation complex constructed in south-east Australia between 1949 and 1974 and now run by Snowy Hydro.
Googong Dam is a minor ungated earth and rock fill with clay core embankment dam with concrete chute spillway plus a nearby 13 metres (43 ft) high earthfill saddle embankment across the Queanbeyan River upstream of Queanbeyan in the Capital Country region of New South Wales, Australia. The dam's purpose includes water supply for Canberra and Queanbeyan. The impounded reservoir is called Googong Reservoir.
Cochrane Dam is a minor earthfill embankment dam with concrete spillway across Georges Creek, located in the South Coast region of New South Wales, Australia. The main purpose of the dam is to supply water for hydro-power at the downstream Brown Mountain Power Station and for irrigation purposes. The impounded reservoir is called Cochrane Lake.
Rocky Creek Dam is a minor rock fill clay core embankment dam across the Rocky Creek, located upstream of Lismore in the Northern Rivers region of New South Wales, Australia. The dam's main purpose is to supply potable water for the region, including Lismore, Ballina, Byron Bay, Evans Head and Alstonville. The impounded reservoir is called Rocky Lake.
Pindari Dam is a minor concrete faced rockfill embankment dam with an ungated uncontrolled rock cut with concrete sill spillway across the Severn River located upstream of the town of Ashford, in the North West Slopes region of New South Wales, Australia. The dam's purpose includes flood mitigation, hydro-power, irrigation, water supply and conservation. The impounded reservoir is called Lake Pindari.
Chaffey Dam is a minor ungated rock fill with clay core embankment dam with an uncontrolled morning glory spillway across the Peel River, located upstream of the city of Tamworth, in the New England region of New South Wales, Australia. The dam's purpose includes flood mitigation, irrigation, water supply, and water conservation.
Manilla River, a perennial stream that is part of the Namoi catchment within the Murray–Darling basin, is located in the Northern Tablelands district of New South Wales, Australia.
Toonumbar Dam is a minor ungated rock fill with clay core embankment dam with a concrete chute spillway across the Iron Pot Creek north-west of Casino in the Northern Rivers region of New South Wales, Australia. The dam's purpose includes hydro-power, irrigation, water supply, and conservation. The impounded reservoir is called Lake Toonumbar.
Ben Chifley Dam, or Chifley Dam, is a rock and earth-fill embankment dam across the Campbells River in the central west region of New South Wales, Australia. The main purpose of the dam is to supply potable water to the city of Bathurst.
Barraba is a town in the New England region of northern New South Wales, Australia. It was formerly the centre of Barraba Shire local government area, but most of this, including Barraba, was absorbed into Tamworth Regional Council in 2004. On Census night 2016, Barraba had a population of approximately 1,400 people. It is part of the Bundarra-Barraba Important Bird Area which is important for the conservation of the endangered regent honeyeater.
Oberon Dam or Fish River Dam is a major ungated concrete slab and buttress with earth embankment dam comprising a concrete ski jump chute spillway and fuse plug across the Fish River upstream of Oberon in the Central Tablelands region of New South Wales, Australia. The dam's purpose includes flood mitigation, industrial, and water supply. The impounded reservoir is called Lake Oberon.
Brogo Dam is a minor ungated rockfill embankment dam with an uncontrolled unlined rock cut spillway across the Brogo River upstream of Brogo in the South Coast region of New South Wales, Australia. The dam's purpose includes environmental flows, hydro-electric power generation, irrigation, and water supply. The impounded reservoir is also called Brogo Dam.