The Clyde dam is spilling over significantly today, attracting the interest of onlookers.
Otago Civil Defence and Emergency Management said in a Facebook post Contact Energy was spilling about 1700 cubic metres of water per second, about twice the amount which is usually discharged from the dam.
A Lauder resident said he hadn’t seen the dam like that in more than 20 years.
Otago Harbourmaster Steve Rushbrook advised recreational boaties, kayakers, and swimmers to avoid swollen rivers, and lakes with hazardous floating and submerged debris.
Downstream of the dam, boil water notices have been issued for Alexandra, Roxburgh and Lake Roxburgh Village, as high, dirty water in the Clutha River affects treatment stations.