The Groundwater (Border Agreement) Act of 1985 provides the legislative framework for the joint management of the groundwater resources along the South Australia/Victoria State border. The Act established a 40 km wide Designated Area along the border, with twenty two management zones. A Border Groundwater Agreement Review Committee (BGARC), which is comprised of members of relevant water management authorities in South Australia and Victoria, administers the Act. The Committee is required to undertake a review of the management arrangements, including Permissible Annual Volumes, at least every five years. A Technical Working Group (TWG), directed by and reporting to the BGARC, conducts investigations of the groundwater resources in the Designated Area. The purpose of this report is to provide technical information from the TWG to the BGARC to enable the mandatory review of the management arrangements in the Designated Area to be undertaken. The BGARC will present its determinations and recommendations to the respective State Ministers in early 2001. This document: - provides a consolidated report of studies undertaken since the last technical review (Bradley et al. 1995), during the period 1996 to 2000; - identifies the key issues facing groundwater management in the Designated Area; and - recommends the key areas of investigation which need to be undertaken during the next five years as part of the 2001 to 2005 technical work program.