The Hurunui Water Project (HWP) proposes a weir at the outlet of Lake Sumner, and a 75m high dam on the South Branch of the Hurunui. This would affect flows on all sections of the Hurunui river. This project has been lodged since the application by Whitewater NZ and Fish & Game for a Water Conservation Order on the Hurunui River. In preliminary feedback on the scheme in 2006 Whitewater NZ warned that the Hurunui River is one of the most utilised white water kayaking rivers in the South Island and any interference with flows is likely to reduce the recreational amenity. Submissions on the resource consent application are due 11 September.