The Sassafras Wesley Vale Irrigation Scheme (SWIS) was developed by Tasmanian Irrigation (TI) and commenced operations in the 2011-12 irrigation season. The scheme is committed to supplying 5,660 ML to 99 irrigators over a 150-day irrigation season, from November to March. In 2019, as part of TI’s proposed Tranche 3 program, a survey was conducted in which 28 existing and 33 new irrigators expressed interest in an additional 5,785 ML. The Sassafras Wesley Vale Irrigation Scheme Augmentation (SWISA) is a project to expand the scheme to meet the contracted plus requested total of 11,445 ML (76.3ML/day) demand. A Preferred Option design is being developed in consultation with the Irrigator Representative Committee.