Cooby Dam Explained

Cooby Dam
Location Map:Queensland
Location Map Caption:Location of the Cooby Dam in Queensland
Coordinates:-27.3858°N 151.94°W
Country:Australia
Location:Darling Downs, Queensland
Status:O
Operator:Toowoomba Region Council
Dam Type:E
Dam Height:32m (105feet)
Dam Length:207m (679feet)
Dam Volume:71e3m3
Dam Crosses:Cooby Creek
Spillway Type:Uncontrolled
Spillway Capacity:680m3/s
Res Name:Cooby Creek Reservoir
Res Capacity Total:23100ML
Res Capacity Active:19703ML
Res Capacity Inactive:1462ML
Res Catchment:159km2169km2[1]
Res Surface:301ha
Res Elevation:482m (1,581feet)
Res Max Depth:12.5m (41feet)

The Cooby Dam is a rockfill embankment dam with an ungated spillway across the Cooby Creek, a tributary of Condamine River, at Groomsville in the Toowoomba Region on the Darling Downs, Queensland, Australia. The main purpose of the dam is for potable water supply of the Toowoomba region.[2] The impounded reservoir is called the Cooby Creek Reservoir.

Location and features

The dam is located approximately north of .[3] The other two storages used for Toowoomba are Perseverance Dam and Cressbrook Dam. Completed in 1942, the rockfill dam structure is high and long. The 71e3m3 dam wall holds back the 23100ML reservoir when at full capacity. From a catchment area of, the dam creates an unnamed reservoir, with a surface area of at a maximum depth of when at full capacity. The uncontrolled un-gated spillway has a discharge capacity of .[2] The dam is managed by the Toowoomba Region Council.[4]

Cooby Dam's lowest usable storage volume was recorded at 8% in January 2010.[1]

In July 2006, public outcry and a referendum with winning "No" vote rejected plans to place recycled water into Cooby Dam. In 2007, the idea was again resurrected when plans for an advanced water treatment plant to be built near Cooby Dam by the Toowoomba City Council were suggested.[5] The trial would test the re-use of recycled water into Toowoomba's drinking water supply.In 2008, an emergency bore was used to extract water from the Great Artesian Basin to supplement water supplies for the dam as drought conditions reduced supply to critical levels.[6]

Recreational activities

A stocked impoundment permit is required to fish in the dam.[7] [8]

Darling Downs Sailing Club uses the dam.[9]

See also

Notes and References

  1. Web site: Cooby Dam. Toowoomba Region Council. Water supply & dams. 2014. 8 July 2014. https://web.archive.org/web/20140714162004/http://www.toowoombarc.qld.gov.au/environment-and-waste/water-supply-and-dams/dams-a-bores/toowoomba-bulk-water/5304-cooby-dam?highlight=WyJjb29ieSIsImRhbSIsImNvb2J5IGRhbSJd. 14 July 2014. dead.
  2. Web site: Register of Large Dams in Australia. Excel (requires download). Australian National Committee on Large Dams. 2010. 2 July 2014. Dams information. 12 December 2013. https://web.archive.org/web/20131212120804/http://www.ancold.org.au/wp-content/uploads/2012/10/Dams-Australia-2010-v1-for-website.xls. live.
  3. Web site: Toowoomba's Dams - Perseverance Dam. Toowoomba Regional Council. 2 November 2009. https://web.archive.org/web/20080727023946/http://www.toowoombarc.qld.gov.au/index.php?option=com_content&view=article&id=788%3Atoowoombas-dams&catid=186%3Awater-supply&Itemid=167&limitstart=1. 27 July 2008. dead.
  4. Book: Harrison, Rod . Queensland Dams. James, Ernie. Sully, Chris. Classon, Bill. Eckermann, Joy. 2008 . Australian Fishing Network., Victoria. 978-1-86513-134-4.
  5. News: Residents again face recycled water. https://archive.today/20120913112901/http://www.theaustralian.news.com.au/story/0,25197,22337308-2702,00.html. dead. 13 September 2012. Mitchell, Selina. 2 November 2009. 31 August 2007. The Australian.
  6. News: Great Artesian Basin used to top up Toowoomba water supply. 2 November 2009. 26 November 2008. ABC News. Australia. 29 July 2022. https://web.archive.org/web/20220729055918/https://www.abc.net.au/news/2008-11-26/great-artesian-basin-used-to-top-up-toowoomba/219586. live.
  7. Web site: Do I need a permit to go fishing in a dam?. Department of Agriculture, Fisheries and Forestry. Queensland Government. 5 February 2013. 4 July 2014. https://web.archive.org/web/20140704083953/http://www.daff.qld.gov.au/fisheries/recreational/permits-dams/stocked-impoundment-permit. 4 July 2014. dead.
  8. Web site: Cooby Dam (Cooby Creek Reservoir) - Toowoomba. Qld. Sweetwater Fishing Australia. 2006. 8 July 2014. Garry Fitzgerald. 26 February 2014. https://web.archive.org/web/20140226140026/http://www.sweetwaterfishing.com.au/Cooby.htm. live.
  9. Web site: How to find us – Darling Downs Sailing Club . 2024-03-05 . en-US.

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