The rāhui will be in place until the stream is repopulated, Ngarewa-Packer said. It could take years to get back to its former state.
At the time Silver Fern Farms said in a statement it was deeply disappointed given its commitment to the environment and the restoration it had done on the stream.
The company has met with Ngāti Ruanui.
"Although the matter is sub judice and we cannot now comment on the incident, our public commitment to working with the community in partnership with Ngāti Ruanui to improve the Tawhiti Stream stands," head of sustainability Justin Courtney said.
The relationship with Silver Fern Farms was one of the good things to come out of the situation, Ngarewa-Packer said.
"They have been completely engaged in the repopulation strategy."