Big River (Grey River / NZ)

The Big River is a river in the Grey District, in the West Coast region of New Zealand's South Island. It rises on the Paparoa Range and flows south to join the Grey River / Māwheranui, about 15 kilometres (9.3 mi) below the point where the waters of Big River (Buller) enter the river.

Source: Wikipedia https://en.wikipedia.org/wiki/Big_River_(Grey)