Locals have concerns over impact to farms.
Campaigners against the River Shannon Water Supply Project says Dublin has a pipe issue, not a supply issue.
The government last month approved the next stages of the project, which will see water diverted from the Shannon to address supply shortages in the capital.
Uisce Éireann initially quoted a maximum spend of 5 point 9 billion euro on the cross-country pipeline - however, its upper estimates are almost double that.
Tipperary farmer Liam Minehan from the Fight the Pipe group says some locals fear the plans will go ahead, despite their opposition:
Uisce Éireann is reassuring landowners there will be minimal impact to farms during the process.
However, these locals still have concerns:
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