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Yan Yean Reservoir

Coordinates: 37°33′S 145°08′E / 37.550°S 145.133°E / -37.550; 145.133
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Yan Yean Reservoir
The Yan Yean Reservoir with Whittlesea in the foreground
Location of Yan Yean Reservoir in Victoria, Australia
Location of Yan Yean Reservoir in Victoria, Australia
Yan Yean Reservoir
Location of Yan Yean Reservoir in Victoria, Australia
Location of Yan Yean Reservoir in Victoria, Australia
Yan Yean Reservoir
Coordinates37°33′S 145°08′E / 37.550°S 145.133°E / -37.550; 145.133
Typereservoir
Primary inflowsToorourrong Reservoir via aqueduct (off-stream storage)
Primary outflowsPlenty River
Basin countriesAustralia
Water volume30 million m3 (30,000 ML)
Photograph, lightly coloured, of the Yan Yean Reservoir, Victoria, 1859

Yan Yean Reservoir is the oldest water supply for the city of Melbourne, Victoria, Australia.[1] At the time of its completion in 1857 it was the largest artificial reservoir in the world.[2][3] It is 30 kilometres (19 mi) north of the city within the eponymous locality of Yan Yean, and is built on the Plenty River, a tributary of the Yarra River. An embankment 9.5 metres (31 ft) high holds back 30,000 ML (1.1 billion cu ft) of water.

The reservoir is managed by Melbourne Water as part of the water supply system for Melbourne.

History

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The name Yan Yean refers to the Aboriginal leader who signed the Batman's Treaty in 1835 with the name "Yan Yan" ("young male").[4]

Work commenced on 20 December 1853 when Governor Charles La Trobe turned the first sod.[3] Construction took place at the height of the gold rush[5] employing a tent city of 1,000 workers returning from the goldfields.[3] The Board of Commissionaires of Sewers and Water Supply was formed that same year in response to the demand for a reliable water supply system.[6]

The reservoir took four years to construct at a cost of £750,000.[7][8] Other sources estimate the cost of the project to be £1,017,087.[9] Most of the pipes were imported from London.[10] It was designed by James Blackburn, an English civil engineer and former London sanitary inspector who was transported to Tasmania as a convict following charges of embezzlement. After being pardoned he came to Melbourne in 1849.[11]

The water was originally supplied by the Plenty River; however, the water quality was poor due to stock crossings and pollution from rural towns.[3] The problem was solved by bypassing the Plenty River and diverting water from Wallaby Creek and Silver Creek, both originating in the Great Dividing Range feeding the Goulburn River. This mountain water was captured in the Toorourrong Reservoir system, constructed in 1883–1885, and supplies water to Yan Yean via an aqueduct to this day.[3] During its construction, the nearby neighbourhood Mernda was created and grew rapidly. Morang became South Yan Yean, and later Mernda.[4]

At the time of its completion in 1857, it was the largest artificial reservoir in the world.[2][3] Photographer Fred Kruger was commissioned by the government to provide images of the extensive works for display at the Colonial and Indian Exhibition of 1886. By 1857, the city of Melbourne had grown to a population of 100,000.[6] The reservoir was inaugurated in the city in 1857's new year's eve.[12]

The region was frequently hit by floods.[13] The reservoir resisted a flood that hit Melbourne in 1923, and became the city's main water emergency resource after the incident.[14] In 1871–72, an arid season led to low water levels in the reservoir and a failure to distribute water throughout the city. During the Second World War, the catchment area was closed for security reasons.[10]

Description

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The site of the reservoir is 183 metres in altitude, allowing sufficient hydraulic head for the water to be piped throughout the city under gravity. The dam is 963 metres long. The reservoir has a capacity of 30 gigalitres. The catchment covers 2,250 hectares.[10]

Wombats, sea eagles, hawks, ducks and deer inhabit the area.[10]

Recreational facilities

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Yan Yean Reservoir Park offers picnic areas, barbecue facilities, walking tracks and views of the reservoir and surrounding mountains.[15] The wetlands are used by birdwatchers. Species include musk duck, Australasian grebe, great crested grebe, white-faced heron, dusky moorhen, Eurasian coot, Latham's snipe, musk lorikeet, eastern rosella, superb fairywren, red wattlebird, grey butcherbird and grey fantail.[16]

References

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  1. ^ 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
  2. ^ a b Clode, Danielle (11 September 2006). Continent of curiosities: A journey through Australian natural history. Cambridge University Press. p. 45. ISBN 0-521-86620-0.
  3. ^ a b c d e f "Yan Yean history in poster format" (PDF). Melbourne Water - Yan Yean Reservoir. Melbourne Water. Archived from the original (PDF) on 7 March 2016.
  4. ^ a b Jamie First, The A-Z story of Melbourne's suburbs, heraldsun.com.au, 7 January 2014 (accessed on 11 September 2019)
  5. ^ R. C. Seeger, 'The History of Melbourne's Water Supply-Part 1', Victorian Historical Magazine, vol 19, no 3, June 1942, pp 107–119 and vol 19, no 4, Dec 1942, pp 133–38
  6. ^ a b History of our water supply system, Melbournewater.com.au (accessed on 11 September 2019)
  7. ^ R. C. Seeger, ‘The History of Melbourne's Water Supply-Part 2’, Victorian Historical Magazine, vol 22, no 1, June 1947, pp 23-47
  8. ^ "Melbourne Water Yan Yean Reservoir fact sheet". Archived from the original on 28 July 2011. Retrieved 2 September 2009.
  9. ^ "The Yan Yean Reservoir - Illustrated Sydney News (NSW : 1853 - 1872) - 15 Apr 1865". Illustrated Sydney News. 15 April 1865. Retrieved 21 April 2016.
  10. ^ a b c d 1853 - 2007 - Flow of History - Yan Yean Reservoir, Onlymelbourne.com.au (accessed on 11 September 2019)
  11. ^ Harley Preston, 'Blackburn, James (1803–1854)', Australian Dictionary of Biography, National Centre of Biography, Australian National University, http://adb.anu.edu.au/biography/blackburn-james-1789/text2019, published first in hardcopy 1966, accessed online 10 June 2015.
  12. ^ 1853 - 2007 | Flow of History - Yan Yean Reservoir, onlymelbourne.com.au (accessed on 11 September 2019)
  13. ^ Andrew Brooks, A brief history of Victorian floods, theage.com.au, 2 December 2017 (accessed on 11 September 2019)
  14. ^ Flashback: Devastating floods hit Melbourne in 1923, Smh.com.au, 1 December 2017 (accessed on 11 September 2019)
  15. ^ "Parks Victoria - Yan Yean Reservoir Park". parkweb.vic.gov.au. Archived from the original on 7 April 2012.
  16. ^ "BirdLife Melbourne - Birding Sites - Yan Yean Reservoir Park". birdlifemelbourne.org.au. Retrieved 21 April 2016.

Bibliography

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  • Jones, Michael, Nature's Plenty: a history of the City of Whittlesea, Sydney, N.S.W. Allen & Unwin, 1992 ISBN 1863730761
  • Dingle, Tony; Doyle, Helen, Yan Yean: A History of Melbourne's Early Water Supply, 2003, Monash University
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