Made available by the Northern Territory Library via the Publications (Legal Deposit) Act 2004 (NT).This groundwater investigation has identified a minor groundwater resource in the Wiso Basin that could be used for horticulture north of Tennant Creek. One test production bore (RN019377) was constructed and test pumped within a thin, fractured zone of the Hooker Creek Formation. The resource is poorly defined, however preliminary estimates indicate the resource could be utilised for extraction up to 9ML/year over a 100 year timeframe. Further investigations are needed to define the resource. Consideration for managing groundwater dependent vegetation is also required prior to developing the resource.Executive Summary -- Introduction -- Geographic setting -- Geology -- Hydrogeology -- Conclusions -- Recommendations -- References -- Appendice