The most recent repairs involved temporarily lowering the level of the lake and then dismantling and reinstating the two main protective walls of the cascade, which funnel water into the dam and control its flow. In total approximately 150 metres of the wall needed to be repaired.

Wherever possible the team used the existing stonework, which they retrieved from the lakebed, cleaned and then re-instated. A section of the original apron, made from a mix of sand and clay and used to line the manmade lake, was also replaced. During the project, timbers from the original construction were also re-discovered still in place.