"This is not just about South Taranaki - this will affect Whanganui, and all the west coast down to Wellington. There are a lot of people in Whanganui who are angry about this, and we wanted to give them a chance to have their say."
She said the mining was a mistake that she wanted to prevent happening, for her children's sake.
"A clean, safe environment will last longer than short-term economic gain. No one actually knows what will happen [as a result of the mining]. Do we want to sacrifice our environment for our greed?" Ms Hawira said.
"If we allow Trans Tasman Resources to come in, this will open the door for other mining companies."
Ms Hawira was hoping for a good turnout, and everyone was welcome.
The protest will take place at noon on September 19 at the Duncan Pavilion, Castlecliff beach. The human chain will happen at 1pm. If the weather is bad, the protest will be moved inside.