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
Bay of Plenty Steamers All Blacks. Bay of Plenty has a proud history of rising to the occasion for major matches, on many occasions, often as part of combined teams in the first half of the 20th century, the Bay has pushed touring teams to the limit in memorable encounters that have ranked as the toughest provincial matches on tour. Although often gallant in defeat the Bay has also recorded some memorable victories over stronger opposition – the 1982 Wallabies were thrashed by 40–16 in Rotorua a week after having defeated the All Blacks, and again in 1990 the same nation was lowered 12–4.