Opponents, including Ngati Kahungunu Iwi Incorporated (NKII) and a number of environmental groups, fear that more intensive farming and land use will pollute the Tukituki River catchment. Mr Butler was criticised last week after derogatory comments about NKII chairman Ngahiwi Tomoana he emailed to Central Hawke's Bay district councillors were made public.
Mr Butler said the comments were taken out of context from an email focused on outlining the employment benefits highlighted by his tour with the newspaper.
On the tour he expressed his frustration that media coverage of a board of inquiry hearing into the dam proposal had focused on the "squeaky wheel" opponents of the project rather than the economic benefits it would bring.
He introduced Hawke's Bay Today to farmers and growers already benefiting from irrigation using aquifer water on the plains. They agreed the Ruataniwha scheme would add further opportunities, boosting the millions of dollars already paid out in wages to workers on the plains.
Dairy farmer Lindsay Smith said his Makaroro Road property had grown from milking 360 to 1550 cows thanks to irrigation and now supported workers from 10 families as well as providing work for local tradespeople. "There's always a contractor of some sort on this property," Mr Smith said.
Access to water provided certainty in a parched area previously known as "snake country" and this had given him confidence to keep investing in the business.
"We've been constantly spending because irrigation is insurance," he said.
Grower David Addis, on nearby Tikokino Road, said he employed 30 people over the four-month peak season and was reliant on irrigation.
Rodger Tynan, of Lime Rock Wines, said the business had grown from a single paddock vineyard to employing six full-time staff and needed water at crucial times of the year.
He said the Ruataniwha water scheme was likely to lead to strong interest in grape growing on the plains.
Mr Butler said Ngati Kahungunu were not being made aware of the benefits of the Ruataniwha scheme, including the additional flows it would send down the Waipawa River.
"That would be the most important aspect for them. The media are not giving us the news that could be good out of this dam."