One the major prerequisites we need to build the houses we need to combat our housing crisis is infrastructure, without it, the development can’t occur. This post is about a highly but often forgotten element of infrastructure Three Waters – Water Supply, Wastewater & Stormwater. In part 1 I focused on Wastewater, part 2 will focus on Water Supply.
Watercare supplies quality drinking water to around 1.4 million Aucklanders. This water is collected from 27 water sources throughout the Auckland region, including dams, rivers and underground aquifers, however, to serve the coming growth we will need to make major upgrades to the Water Supply. Much of Auckland’s water supply comes from dams such as Mangatangi (Built 1977), Mangatawhiri (1965), Cosseys (1955), Wairoa (1975) and Hays Creek (1967) which are in the Hunua Ranges in South Auckland. The water from these dams are treated at Ardmore Water Treatment Plant in South Auckland.
Auckland also has Waitakere and Waitakere Saddle (1910), Upper Nihotupu (1923), Lower Nihotupu (1948), Upper Huia (1929), & Lower Huia (1971) dams which are treated at three water treatment plants in West Auckland: Huia, Huia Village, and Waitakere. We also source from the Waikato River which is treated at Waikato Water Treatment Plant in Tuakau (2002) as well as source from groundwater supply at Onehunga, Muriwai, Hamiltons Road (Algies Bay/Snells Beach), Waiuku, and Bombay.
While we have recently completed the Hunua No.4 Watermain a 28km Watermain from Redoubt North Reservoir in Manukau to Epsom, we will also need to build the following according to the Long Term Plan.
- Hunua No.4 Watermain Extension ($66m) This will extend the new Hunua Watermain through to the Khyber reservoirs in the central city to serve the large growth occurring in the City Centre & Fringe. 2020+.
North Harbour Watermain duplication ($196) Duplicates the North Harbour Watermain from a new Titirangi No 3 Reservoir to the Albany Reservoir in order to provide for growth in Albany & Rodney. The project will also allow Watercare to repair the old North Harbour Watermain if something occurs without affecting a large area – 2013 – 2023.
- Runciman Road Reservoir ($47m) This project is important to protect the long run security of the water supply from the Waikato River, it involves the provision of additional storage reservoir capacity to maintain security of supply standards for increasing water demand arising from growth – 2015 – 2025
- Runciman Road Reservoir No.2 ($43m) This is stage 2 of the above timed to meet growth – 2026 – 2035.
- Waikato Water Treatment Plant Expansion ($55m) This expands the capacity of the current treatment plant to provide capacity for growth as well as resilience in case of an issue at another major treatment plant – 2020 – 2021.
- Waikato Water Treatment Plant No.2 and Watermain ($400m) Provides additional capacity & resilience by increasing the capacity of water that can be taken from the Waikato River – 2015 – 2025
- Waikato Water Treatment Plant No.2 capacity upgrade ($316m) Expands the capacity of the above treatment plant – 2012 – 2021
- Hunua No.1 and Huia No.1 watermains ($90) Replaces Hunua No.1 & the Huia No.1 watermain which is approaching end of asset life – 2012 -2021
- Huia Water Treatment Plant upgrade ($241m) This is the upgrade or replacement of the old Huia Water Treatment Plant which is reaching the end of asset life 2012 – 2023
- Huia No.2 Watermain replacement ($110m) Replaces Huia No.2 Watermain which is approaching end of asset life – 2026 – 2035
- Waitākere Water Supply Treatment upgrade ($123m) Replaces Waitākere Water Supply Treatment which is approaching the end of asset life – 2026 – 2035.
These projects are also integral if we are to provide for the growth to tackle this housing crisis, however, it is key that an integrated approach is taken to infrastructure where AC/AT/NZTA/Watercare/Panuku/Crown work together on each area as a complete package of Three Waters, Transport, Planning & Community/Social Services to make work & not in isolation of each other.