Ever wondered about the story etched within these muddy shores? This is Māngere Inlet. It is an arm of the Manukau Harbour. This inlet is more than just a body of water. It whispers tales of ancient voyaging. It also echoes with the clamor of industry.
Māngere Inlet lies between the Auckland isthmus and South Auckland. The inlet spans 6.6 square kilometers. Its catchment area covers 34.5 square kilometers. The inlet reaches just west of Onehunga.
For centuries, Māngere Inlet was known as Te Waimokoia to Tāmaki Māori. The area held immense strategic value. Te Tō Waka at Ōtāhuhu marks a key overland route. Māori would beach their waka canoes here. They then dragged them across land. This avoided the treacherous journey around Cape Reinga. Portage Road in Ōtāhuhu still traces this ancient path.
In the 1850s, European settlers transformed the area. Māngere Inlet became Auckland’s agricultural heartland. Later, the railway spurred industrial growth. Factories sprung up westward from Westfield. These factories unfortunately discharged waste into the inlet.
The narrowest point of the Auckland isthmus is at Ōtāhuhu. Here, Māngere Inlet is only 1200 meters from the Otahuhu Creek. This creek flows into the Hauraki Gulf. Ngarango Otainui Island sits in the inlet near Ōtāhuhu.
Māngere Bridge spans the inlet’s western end. This is where it joins the Manukau Harbour. The inlet is about 750 meters wide at this point. The Waikaraka Cycleway traces the northern shoreline.
In 1947, Dove-Myer Robinson proposed a radical idea. He suggested damming Māngere Inlet. All of Auckland’s sewage would then be sent here. It was to act as a giant oxidation pond filled with water hyacinths. This plan never materialized. Instead, the Manukau Wastewater Treatment Plant was built. It included oxidation ponds near Puketutu Island and Māngere.
Māngere Inlet has been heavily altered by humans. Three embayments along the northern shore have disappeared. They were mostly used as landfills. Land reclamation for the Westfield Rail Yards further reduced the inlet’s size in the east in the 1960s. The southern shore remains less changed.
The waters of Māngere Inlet are known for being muddy. Mangrove swamps fringe much of the shoreline. These become less common west of Māngere Bridge.
For many years, industries released untreated waste into the Manukau Harbour. This harmed the harbor’s ecology. The harbor was once a popular spot for swimming, sailing and fishing. By the 1950s, decomposing waste caused hydrogen sulfide smells. It even blackened lead paint. In 1962, the Māngere sewage works began to improve the situation. Coastal protection zones were established in 2008.
However, challenges remain. Industrial sewage mixes with stormwater. This leads to toxins in shellfish. Despite these issues, Māngere Inlet holds a unique place in Auckland’s story. It connects the past and present. It is a reminder of our relationship with the environment.
Once, there was even talk of building Stadium New Zealand here. Architects thought it would be accessible. They also felt it would be away from residential areas. The idea never gained traction.
As you stand here, consider the layers of history beneath your feet. Māngere Inlet continues to evolve.