Ms Walker said she felt very positive after the corporate and strategic committee meeting last week, despite these changes.
"Although changes have been made to the conditions, it's still moving forward," she said.
"What they are saying is the investment option is still on the table, but they still need more information to make the right investment."
In 2015, CHB district councillors voted unanimously to enter into a water user agreement to take water from the RWSS for urban supply, subject to further due diligence and public consultation, but later reserved its decision until there was certainty around the project.
With the modified condition precedent lifting the number of water sales needed for investment, the matter could be back under discussion with the council, as part of its long-term planning, Ms Walker said.
"That long term planning is looking at the size and resilience of the district's water networks, particularly Waipawa and Waipukurau, and it's an option we need to revisit.
"What we are dealing with is uncertainty both for the community and for us as a council as we plan for the future.
"We also have to respect and understand that the regional council is also dealing with this uncertainty."
She noted that the project, that was being considered in conjunction with Plan Change 6, was unprecedented and that it would require leadership to pull the pieces together and move the region forward.
CHB regional councillor Debbie Hewitt also acknowledged the uncertainty surrounding the project, but said the nuts and bolts had been hammered out at last week's committee meeting.
"There's some environmental concerns in the community, which has to be confident in the regional council as a regulator so tidying up those concerns is really important."
She said if the Hawke's Bay Regional Investment Company signalled it was comfortable with the conditions precedent, particularly the increased water take volume, the onus would then be back on the CHB community to have a serious discussion with the CHB District Council about it committing to taking water for the district's townships.
When discussing the issues, she said it was important as regional councillors that they did not back themselves into corners, but take a broad view and look at the reasons the scheme was proposed in the first place.
"There was a community that was underperforming, with over-allocated water take consents and environmental constraints - the recent review has looked at all of this and it's important we take a wider look at all the issues."
Meanwhile, the Water Benefits All group, established in Central Hawke's Bay by a number of farmers and business people, had called on the council to have optimism and courage when it came to its decision making.
Chairman Ian Walker said that in essence the recent review of the scheme had determined the project was bold and visionary, and that not proceeding with it would incur large costs and make it increasingly complex to improve the health of the Tukituki River, at the same time as halt economic decline.
