According to an affidavit of Hapukuniha Te Huakore Karaka, two taniwha were placed in strategic locations in the river to protect the hapū from invading tribes — one near Paoaruku (a locality at ), and one at the Wairoa River (a small creek at ). Karaka said that a bridge was built from Tikitiki to Waiomatatini, to the protest of local Māori who were concerned that it would disturb the taniwha. The night before the bridge was completed, a storm came washing the bridge away — the weather till then had been calm. From then, one person would drown in the river nearly every year. If it did not happen one year, two would drown the next. A local tohunga, George Gage (Hori Te Kou-o-rehua Keeti) was approached to help the situation, and after that there were no similar drownings.