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 foreign (planted) forest areas are found in the inland parts of the region. The Kaingaroa Forest is the world's largest planted forest, comprising radiata pine mainly used for timber. The bay contains numerous islands, notably the active volcano Whakaari / White Island, which lies 50 kilometres from the coast in the eastern bay. Other large islands include (from west to east) Matakana Island, Mayor Island / Tuhua, Motiti Island, and Moutohora Island. The Waimangu Geyser – to be seen 1900–1904 – erupted frequently, was the most powerful geyser of the world and killed 4 people in 1903. In the 2006