The total area of approximately 15,000 hectares (ha) includes approximately 11,600 ha of agricultural land of class four or better. The system of almost 74km of pipe ranges from altitudes of approximately 40m to 160m. The trunk pipeline terminates within 1km of the coast and the spread of an area of over 10,000 hectares.
Six new branch lines have been cut-in to and existing trunk pipeline with three lines having in line booster pumps. The scheme is designed to deliver and annual total of 5,460ML of water over the summer contract period of 150 days. The water is delivered to the farmers via 123 property outlets.
The scheme consists of six branch lines connected to an existing DN900 ‘trunk main pipeline. Three branch lines are supplied by residual pressure from the trunk main (Pardoe, Thirlstane and Aldersons) while three have in-line booster pump stations (Northdown, Harford and Sassafras).
The branch lines comprise a current total branch length of almost 74km of HDPE pipeline. The branch pipe sizing ranges from 160mm up to a maximum of 450mm in diameter. Some spur lines and other offtake extensions handling lover volumes will be 125mm diameter or smaller to facilitate more cost effective, alternative installation methods.
VEC Leed JV were selected by Tasmanian Irrigation to deliver this irrigation scheme. The project required close liaison with approximately 150 property owners each with specific requirements. This was a huge undertaking and VEC have succeeded in keeping harmonious relationships with these key stakeholders.
Sassafras Wesley Vale Irrigation Scheme is designed to bring water security to one of Tasmania’s prime agricultural regions and to provide opportunities to boost food production. The scheme consists of 73km of welded poly pipe, 3 pumping stations and 122 property outlets. Water is being supplied from the disused pipeline that fed the Wesley Vale Paper Mill before its closing. The scheme ties in to this pipeline no less than six times at various locations extending from Sassafras on the western side of the Bass Highway through to Wesley Vale and Northdown.