One alternative is the construction of a new dam wall in Blayney Shire at Lake Rowlands.
Lake Rowlands Dam, formerly known as Coombing Dam, is situated on the Coombing Rivulet, a tributary of the Belubula River. The gross storage of the present dam is 4,500 mega-litres.
Central Tablelands Water currently supplies Blayney, Canowindra, Carcoar, Cargo, Cudal, Eugowra, Grenfell, Lyndhurst, Mandurama, Millthorpe, Manildra and Quandialla.
The Centroc group of councils has proposed to upgrade Lake Rowlands to a capacity of approximately 26,000 mega-litres to increase the water security of the Central West. Part of the extra water would be provided to Orange.
There have however been questions raised about the amount of water Orange could secure from this catchment, given a large amount has been allocated to agriculture, industry and Central Tablelands Water.
New South Wales Office of Water (NOW) is undertaking an independent review of the secure yield of Lake Rowlands.
The construction of a new Dam wall is estimated to cost $150 million. A pipeline connected to Orange is estimated to cost $53 million.
There is an expected construction timeframe of 15 years and these construction costs would increase during this time period.