The region proposed for Tamar currently incorporates a large number of smaller land holdings that provide a range of agricultural products. This varies from pasture and cereal crops for stock through to orchards and vineyards for fruit and wine production. There are also a number of boutique agricultural services provided in the area including nurseries and flower farms. The construction of a dedicated irrigation scheme will increase the area of land able to be irrigated thereby allowing changes in agricultural activity to high value commodities, and trading and movement of water between properties.
Demand for 5,600 ML/season on the West Tamar and 1,900 ML/Season for the East Tamar/Pipers area was indicated from initial Expressions of Interest (EOI) sought in March 2018.
The concept design for the scheme is based on a 150-day irrigation season with water sourced from Lake Trevallyn. The southern end of the scheme from Westwood to Legana will have water supplied from the Meander River. The scheme consists of an 8.2 km rising main from Trevallyn Dam to a balance tank at approximate level of 286 meters. All irrigators on the West Tamar will be supplied under gravity pressure from the balance tank. Irrigators on the East Tamar will be supplied via boost pumps for those East of East Arm Road, with a second small boost pump near Second River Road. Irrigators on Pipers River will be able to receive riparian deliveries north of Karoola.
The 119.8 km of pipelines connect (within 1 km) more than 70% of the EOIs received for the scheme area, the Pipers River connects a further 9% of the EOIs.