. Provide integrated treasury management and financial advisory services, which is provided to the Department of Water Affairs and Forestry, and water boards. . Construct of infrastructure: The two projects that the TCTA is responsible for are the implementation and funding of is the Berg Water Project (BWP) and the Vaal River Eastern Subsystem Augmentation Project (VRESAP). In terms of the National Water Act (No 36 of 1998), TCTA fulfills a function of being a body that oversees the international treaty between Lesotho and South Africa by managing the Lesotho Highlands Project. . Assist with debt management.