Happy Valley Reservoir is an important water supply for metropolitan Adelaide.

 

In 2002, a $22 million rehabilitation project was launched at Happy Valley as part of a program to meet or exceed national and international guidelines for best practice management of dam structures.

 

The work was completed in August 2004 and involved strengthening and raising the wall with 300,000 cubic metres of fill, upgrading the spillway and modifying the pipes and roadway below the dam to allow construction of a new wall.

The rehabilitation work has increased the flood storage capacity by 165% and reduced the risk of failure from earthquake and leakage through the dam and foundations.