Wainui River (Bay of Plenty) Wainui River (Bay of Plenty) The Wainui River is a river of the Bay of Plenty Region of New Zealand's North Island. It flows north from the Kaimai Range to reach Tauranga Harbour south of Katikati. The catchment has of stream margins. 41% of the catchment remains covered in native bush, but 48% is under pasture and suffers soil erosion. The river includes 3 waterfalls of up to , which have been kayaked. The long former East Coast Main Trunk railway bridge is designated as the limit of the Coastal Marine Area. Downstream, a 3-span bridge takes SH2 over the
Western Bay of Plenty District area that is not part of the district). The district came into being in the local government reorganisation of 1989; with minor modifications to the boundaries, it merged the old Tauranga County and Te Puke Borough. The greatest changes were in the northwest, with Waihi Beach being transferred to the district from the old Ohinemuri County, and in the vicinity of Tauranga City, where some of the hinterland, formerly in the county, was transferred to the city. The wards (for the purposes of electing district councillors) are the following: Western Bay of Plenty District Western Bay of Plenty District is