Toowoomba’s third water storage Cressbrook Dam was carried out 1983 and provided water to Toowoomba in 1988. It features a full capacity around 80,000 megalitres getting total capacity from the three dams, Cooby, Perseverance, and Cressbrook, to 126,000 megalitres.
The town also offers subterranean supplies in fractured basalt. Toowoomba sits over the eastern fringe of the truly amazing Artesian Basin and also to free airline subterranean water can be obtained beneath farming alluvium.
The typical rain fall at that time 1998 to 2005 continues to be 30% below the long-term average in line with an extended drought which trend ongoing right through to spring of 2007. In mid 2005, water situation for that city was becoming critical with water supply levels below 30%. Environment flows from Cressbrook Dam into Cressbrook Creek were permitted to cease as Toowoomba contacted level five water limitations. Throughout March 2006 the top water storage within the dams fell below 25% of full capacity, falling much more to 12.8% by 10 March 2008. The city’s water supply was at a record low of seven.7% in December 2009.
The prior Toowoomba Mayor Dianne Thorley suggested a questionable potable re-use project underneath the Toowoomba Water Futures plan which may lead to water reclaimed in the Wetalla Sewage Treatment Plant being came back to Cooby Dam to supply 25% from the potable water supply for Toowoomba. Other water supply options include posting water from Oakey Creek Groundwater Management Area (average TDS = 1660 mg/L), posting water from Condamine Groundwater Management Area (Average TDS = 740 mg/L), and water from coal seam gas production (TDS = 1200-4300 mg/L).
Among the problems with water Futures proposal was it depended on Acland Coal, a subsidiary of recent Hope Corporation, using the reverse osmosis waste stream. However, they’d never decided to this. Without their participation, 6 square kms (2.3 sq mi) of evaporation ponds, costing a minimum of one more $70 million, could have been needed. This amount wasn’t incorporated in Council’s plan for water Futures project.
On 29 This summer 2006 Toowoomba City Council carried out a poll of Toowoomba citizens around the proposal to make use of this multi-barrier filtration for blocking sewage for consuming reasons. The poll question was: “Would you support adding purified recycled water to Toowoomba’s water supply via Cooby Dam as suggested by Water Futures – Toowoomba?” 38% of voters supported the proposal and 62% opposed. This resulted in despite dams reaching critical levels, the town declined using recycled water inside a plebiscite. Because the public rejection in 2006 of adding recycled sewage towards the h2o supply, water conservation measures have incorporated cropping stormwater to be used in public places parks and adding strained groundwater towards the town water supply.The town was under level 5 water limitations by 26 September 2006. This forbids citizens by using town water on their own grass, gardens or cars, and citizens are strongly advised to chop lower on water consumption.
In 2007, the Toowoomba City Council commenced a bore drilling program to enhance the dwindling dam supplies and built several subartesian bores over the city and something artesian bore at Wetalla within the city’s north. Most of the subartesian bores provided potable water having a reliable yield and also have been progressed into production nevertheless the artesian bore’s water quality was inadequate, barring development like a potable source. This was a costly setback for that city because the cost was on theDollartwo million for drilling to in excess of 700 metres. In The month of january 2008, yield testing have been delayed because of the unavailability of appropriate moving equipment. The Toowoomba Regional Council started adding to the city’s water supply with bore water in the Great Artesian Basin in September 2009. Groundwater has turned into a significant cause of the city’s water supply needs and today comprises 1 / 3 from the total amount of water treated for reticulated supply (160 ML each week).
Also in 2007, the Queensland Department of Natural Assets and Water started a subartesian drilling program centred on Toowoomba to grow its network of groundwater monitoring stations within the Primary Range Volcanics. Using the elevated interest in groundwater in the region from council, commercial and urban customers, more details was needed to effectively manage the resource whereas formerly the place and density of monitoring stations wouldn’t provide enough data.
The condition government has generated a $187 million pipeline from Wivenhoe Dam to Toowoomba. Water moving across the 38 km pipeline to Cressbrook Dam started in The month of january 2010.