Clarrie Hall Dam

Clarrie Hall Dam is located southwest of Murwillumbah, in the Northern Rivers region of New South Wales, Australia.

It was constructed between 1979 and 1983 to provide water storage for Tweed Shire's drinking water supply. The dam creates Lake Clarrie Hall via the Doon Doon Creek, a tributary of the Tweed River. The dam supplies 20% of the Shire's water requirements when the freshwater levels in the Tweed River fall below 95%.

The dam is a minor ungated concrete faced rockfill embankment dam with an uncontrolled concrete-lined chute spillway. It has a height of 43 meters and a length of 175 meters. At 100% capacity, it holds back 16,000 megalitres of water. The surface area of Lake Clarrie Hall is 220 hectares, and the catchment area is 60.2 square kilometers. The dam's construction cost was estimated at A$34 million, and an upgrade of the spillway crest was completed in 2013.

In December 2015, Tweed Shire Council approved the raising of the dam wall by 8.5 meters to double its footprint and treble its capacity. This expansion aims to meet the growing water demands in the region. As of December 2020, 12 of the 16 affected properties have been purchased for the project. An environmental impact assessment is due to be completed in February 2021, and construction is expected to begin in December 2023.

Clarrie Hall Dam is a significant engineering feat that ensures a steady water supply to Tweed Shire. Visitors can enjoy the beauty of Lake Clarrie Hall while learning about the dam's