One of the greatest early engineering feats in South Wairarapa could now signal a looming dilemma for those charged with administrating it.
The Moroa water race, built over 100 years ago and which spans 250km of rural South Wairarapa, has long been a godsend to farmers on the dry plains and to other users on the fringes of the urban areas, especially around Greytown.
But clean water accords that now insist waterways are fenced off from stock, coupled with restrictions on being allowed to pump water from the race, pose questions on how the water race can be accessed for stock water while at the same time obeying the rules.
South Wairarapa mayor Adrienne Staples said she believed most farms along the network of water races had fenced off their section of the race.
Stock were not allowed to linger in the waterway, Mrs Staples said, and she thought electric fencing was being used in some cases to fence off the race.