The Groundwater (Border Agreement) Act of 1985 legislated to provide a framework for the joint management of groundwater resources within a 40 km wide strip along the length of the South Australian and Victorian Border, which is referred to as the Designated Area. The Border Review Committee, comprising members of the relevant water management authorities in both South Australia and Victoria, administers the Act. A Technical Working Group, reporting to and directed by the Review Committee, conducts investigations of the groundwater resources within the Designated Area to provide the necessary input for groundwater resource management by the Review Committee. An essential requirement of the Act is the regular review of various components of the Border Agreement at intervals not exceeding five years. The first five-year management review was completed in 1991 and incorporated the results of a five-year groundwater resource assessment review for the period 1986 to 1990 (Stadter and Stewart, 1991). For the second five-yearly management review due in 1996, a five-year technical work plan was prepared: the subject document presents the results of the investigations undertaken between 1991 and 1995. In order to fulfil the requirements of the Border Agreement Act, this document also reviews the following components specified in the Act: - the permissible annual volumes of groundwater extraction for the individual Zones of the Designated Area; - the permissible distance from the border within which the Border Groundwater Agreement Review Committee is responsible for review of applications for groundwater extraction; - the permissible rate of lowering of the potentiometric surface; and - the permissible levels of groundwater salinity (if any) for the individual Zones of the Designated Area.