O'Shannassy Reservoir
The O'Shannassy Reservoir is an Australian man-made water supply dammed reservoir. The 3.123 GL (687 million imp gal; 825 million US gal) water store across the O'Shannassy River is located near the locality of McMahons Creek, approximately 80 kilometres (50 mi) east of Melbourne, Victoria. The dam that creates the impoundment is called the O'Shannassy Dam.[3][4]
Location and features
The reservoir is part of Melbourne's water supply system. Water flows under gravity to Silvan Reservoir, then to storage and distribution reservoirs around Melbourne. It is the smallest of the water storage reservoirs managed by Melbourne Water, with a capacity of approximately 3.123 GL (687 million imp gal; 825 million US gal), but it is on a very productive catchment, with stream flow averaging 80 GL (18 billion imp gal; 21 billion US gal) per annum.[5][6][7][8]
The location was selected as it is at sufficient altitude for gravity supply to the elevated eastern suburbs of Melbourne. A diversion weir on the O'Shannassy River and aqueduct to the Surrey Hills Reservoir in Melbourne were completed in 1914. The weir was complemented by the construction of the dam and its reservoir in 1928, but the weir was still used to divert river flows into the aqueduct. The construction of the Yarra-Silvan conduits in the 1950s resulted in reduced requirements for the aqueduct which was decommissioned in 1997.[7][8]
See also
- List of reservoirs and dams in Victoria
- Melbourne Water
References
- ^ "ENORMOUS DAMS BEING BUILT". The Ballarat Star. No. 20235. Victoria, Australia. 28 June 1922. p. 10. Retrieved 7 March 2017 – via National Library of Australia.
- ^ "Register of Large Dams in Australia". Dams information. Australian National Committee on Large Dams. 2010. Archived from the original (Excel (requires download)) on 12 December 2013. Retrieved 22 March 2014.
- ^ "METROPOLITAN WATER SUPPLY. : Successful and Comprehensive Scheme. How Engineers Overcame Difficulties. Details and Illustrations. No. 5. 0'Shannassy and Upper Yarra system". The Prahran Telegraph. Vol. 67, no. 3416. Victoria, Australia. 4 February 1927. p. 3. Retrieved 7 March 2017 – via National Library of Australia.
- ^ "A VISIT TO THE WATERSHEDS: NORTHCOTE COUNCIL INSPECT THE O'SHANNASSY SCHEME". The Advertiser. Vol. 68. Victoria, Australia. 25 October 1929. p. 3 (AFTERNOON). Retrieved 7 March 2017 – via National Library of Australia.
- ^ O'Shannassy Reservoir, Melbourne Water, retrieved 26 May 2019
- ^ Balassone, Paul (2006), Pigging of the O'Shannassy Outlet Mains (PDF), 69th Annual Victorian Water Industry Engineers and Operators Conference, retrieved 8 September 2010
- ^ a b O'Shannassy Aqueduct Trail, Yarra Ranges National Park (PDF), Parks Victoria, June 2013, retrieved 26 May 2019
- ^ a b Ritchie, E. G. (October 1934), "Melbourne's Water Supply Undertaking" (PDF), Journal of Institution of Engineers Australia, 6: 379–382, archived from the original (PDF) on 18 February 2011
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dams / reservoirs by capacity
- Thomson 1.123 million ML (247 billion imp gal; 297 billion US gal)
- Cardinia 287,000 ML (63 billion imp gal; 76 billion US gal)
- Upper Yarra 200,000 ML (44 billion imp gal; 53 billion US gal)
- Sugarloaf 96,000 ML (21 billion imp gal; 25 billion US gal)
- Silvan 40,000 ML (8.8 billion imp gal; 11 billion US gal)
- Tarago 37,500 ML (8.2 billion imp gal; 9.9 billion US gal)
- Yan Yean 30,000 ML (6.6 billion imp gal; 7.9 billion US gal)
- Greenvale 27,000 ML (5.9 billion imp gal; 7.1 billion US gal)
- Maroondah 22,000 ML (4.8 billion imp gal; 5.8 billion US gal)
- O'Shannassy 3,000 ML (660 million imp gal; 790 million US gal)
- Anakie
- Melton
- Toorourrong
dams / reservoirs
- Allen
- Blue Rock
- Bostock
- Dartmouth
- Eildon
- Eppalock
- Glenmaggie
- Korweinguboora
- Laanecoorie
- Lauriston
- Malsmbury
- Marengo
- Moondara
- Painkalac
- Rocklands
- Stony Creek
- Upper Coliban
- Waranga Dam
- West Barwon
- West Gellibrand and Olangolah Reservoirs and No.4 & No.5 Basins
- Wurdee Boluc
- Boga
- Cairn Curran
- Catani
- Guthridge
- Mokoan
- Mulwala
- Nagambie
- Narracan
- William Hovell
government agencies
- Barwon Water
- Central Highlands Water
- Coliban Water
- Goulburn–Murray Water
- Goulburn Valley Water
- Greater Western Water
- Melbourne Water
- South East Water (Australia)
- Southern Rural Water
- Yarra Valley Water
- Catchment Management Authority (Victoria)
- Corangamite CMA
- East Gippsland CMA
- Glenelg Hopkins CMA
- Mallee CMA
- Port Phillip and Westernport CMA
- West Gippsland CMA
- Minister for Water (Victoria)
- William Davidson
- William Thwaites
- Bittern
- Devilbend
- Terang
- City West Water