A view looking north towards Putāruru of the hydro dam during the jet grouting trial, winter 2025.
Drivers who regularly travel between South Waikato, Waipā and the King Country via the Arapuni Dam will take a detour for up to three years.

Mercury programme manager Tom Newson, who has overall responsibility for the project and also worked on the dam in the mid-2000s, when the last major repair project was completed, points to a graphic showing the work underway. Photo: Mary Anne Gill



