Waihou

Geography

The river flows north for 150 kilometres (93 mi) from the Mamaku Ranges past the towns of Putāruru, Te Aroha, Paeroa and Turua, before reaching the Firth of Thames at the south end of the Hauraki Gulf near the town of Thames. In its lower reaches, the river and the nearby Piako River form the wide alluvial Hauraki Plains. Just before the river reaches the ocean, State Highway 25 crosses the river over the Kopu Bridge, which was the longest single lane bridge in the country at 463 metres (1,519 ft) and the only remaining swing bridge on a New Zealand state highway. The bridge was infamous for the queues of vehicles travelling to and from the Coromandel Peninsula until a new two lane bridge was opened in December 2011.

History

Many areas on the banks of the Waihou River were settled by Hauraki Māori, such as Oruarangi pā and Paterangi pā near Matatoki, and the Te Raupa pā and Waiwhau pā near Paeroa. The mouth of the river was famous as a location for pātiki (flounder) fishing.

In the 1910s stopbanks and floodgates were constructed along the Waihou River in order to protect farmland from flooding, including a canal constructed at the point where the Waihou River and Ohinemuri River meet, west of Paeroa. Further work occurred in the 1980s after extensive flooding in 1981.

In 1879 Te Au o Tonga, or the Falls of Awotonga, were destroyed by 200 pounds (91 kg) of dynamite to free the navigation of the river for shipping. There was a water column of 150 ft (46 m).