2004 – Cosseys Dam – Update solutions that meet owner, operator, environmental and community expectations

Rapid increases in pore pressure measured in the embankment in 1987 and 1994 raised concerns regarding the internal stability and safety of Cosseys Dam. A comprehensive dam safety review indicated that the dam would not meed modern design standards and a broad range of options to upgrade the dam were evaluated assessing not only the technical design aspects, but also the construction impacts on the operation and reliability of the water supply network, the environment and the local community. A multi criteria selection matrix was used to assist in selecting the preferred upgrade solution. Extensive consultation was undertaken with the dam owner, dam operator, City Councils and local community to ensure that the upgrade solution would satisfy the technical requirements of the project while minimising construction impacts. The project enjoyed a positive profile throughout the duration of the  construction