Maroondah water supply system

Explore the historically-significant Maroondah system: part of an extensive water storage and delivery network, which has supplied clean drinking water to Melbourne since 1891.

Located northeast of Melbourne, the system includes Maroondah Aqueduct, Coranderrk Aqueduct and Maroondah Reservoir. While some sections have been decommissioned, many parts still play an integral role in the everyday supply of water – and several areas are open to the public for picnics and walking.

Discover the Maroondah system

Maroondah Reservoir outlet tower surrounded by fog

Maroondah Aqueduct

Starting at the reservoir outlet tower, journey to Donnelly’s Weir – a popular picnic spot – taking in the pines along One Lane Bridge, and finishing at the Yering Gorge Pumping Station.


Explore Maroondah


View of Badger Creek Weir in the forested Maroondah catchment

Coranderrk Aqueduct

Follow the aqueduct from Badgers Creek Weir to Silvan Reservoir, and learn how it was maintained by hearing first-hand from a previous caretaker.


Follow Coranderrk


Base of Maroondah Dam with valve house and tree

Maroondah Reservoir

Admire the scenic garden and picturesque valve houses at the base of the dam, and take in views over the reservoir and its outlet tower.


View the reservoir


How the system works

Aqueducts are channels that carry water from one place to another. In the case of Maroondah and Coranderrk aqueducts, water was historically taken from Watts River and Graceburn and Badger creeks, which in turn are fed by densely forested catchments – often in the form of National Parks.

Nowadays, Maroondah Aqueduct is fed by Maroondah Reservoir: a large water storage formed by building a dam across a river (in this case, the Watts River). From the aqueduct, water flows through pumping stations, siphons and tunnels on its way to Melbourne.


Historical timeline

The Maroondah system’s history is inextricably linked with Melbourne’s expansion and development. This incredible infrastructure exists thanks to the hard work of the men and women who built and maintain it, with each section representing a major feat of engineering.


1870: Demand for water outstrips supply

Following the gold rush, sustained population growth and a dry decade placed pressure on Melbourne’s only reservoir – Yan Yean – which had shrunk to low levels by 1879. Demand for water again became a concern, and the search for a new source of clean, abundant and reliable water was on.

Map of Watts River, Maroondah System, 1925
Map of Watts River, Maroondah System, from a 1925 plan; image from Melbourne Water archives


1879: Survey of Watts River completed

Black and white photograph of Watts River Weir
Watts River Weir

The Water Supply Board (predecessor to the Melbourne Metropolitan Board of Works) commissioned surveyor J.H. Davies to undertake a detailed survey of the Watts River and its tributaries. Davies reported that the area was viable and suggested two options: a diversion weir, or a dam across the Watts River valley.


1886: Watts River Scheme construction begins

The Water Supply Board decided to build a weir upstream from the proposed dam site, diverting water from the Watts River to Preston Reservoir via an open aqueduct. This came to be known as the Watts River Scheme.

Black and white photo of Fernshaw township, surrounded by forest
Entrance to Fernshaw township across the Watts River

Watts River and its tributaries were assigned exclusively as water harvesting catchments, and the area was closed off to human occupation to protect water quality. This meant relocating the entire township of Fernshaw, which had been established along the river as a coach stop in the 1860s.


1891: Melbourne Metropolitan Board of Works established

The Watts River Scheme was completed in February 1891 and renamed ‛Maroondah’, on the false assumption this was the Indigenous name for the area. Coinciding with its completion, the Melbourne Metropolitan Board of Works (MMBW) was formed one month later on 18 March 1891.

The MMBW was tasked with building a much-needed sewerage system to tackle the typhoid and cholera epidemic gripping Melbourne, but its functions were soon expanded to include managing Melbourne’s water supply system.

Black and white photo of men in suits at the Watts River Scheme opening
Watts River Scheme opening, 1891


1909: Coranderrk system completed

Black and white historic photo of women standing on a weir
Coranderrk Weir

The MMBW continued work on the Maroondah system, commencing work on the Badger Creek Weir in 1905 to connect to the Graceburn-Maroondah aqueduct siphon. Upon completion in 1909, the system was named ‛Coranderrk’ after the nearby reserve established by the Wurundjeri people. The Coranderrk Aqueduct was added to the system in 1931.

The same year, a Royal Commission was held to decide between building a reservoir at Maroondah or a diversion weir on the O’Shannassy River. While also recommending the O’Shannassy scheme, the Commission acknowledged the need for Maroondah Reservoir to meet growing demand.


1920: Maroondah Reservoir construction begins

Black and white historic photo of the Maroondah Reservoir outlet tower
Maroondah Reservoir outlet tower

Further population growth and a severe drought prompted the MMBW to begin building its first water supply project, the Maroondah Dam. The dam was built downstream of the original Watts River weir and completed in June 1927. Thereafter, the Watts River Scheme became known as the Maroondah Water Supply System.


1920 onwards: System expansion

The MMBW further expanded the water supply system throughout the 1920s and 30s, building the O’Shannassy and Silvan reservoirs to increase Melbourne’s water storage capacity from 30,000 megalitres to 104,500 megalitres.

Development continued into the second half of the twentieth century, with major projects including the Upper Yarra, Thomson and Sugarloaf reservoirs.


2018: Heritage listing

The Maroondah Water Supply System was added to the Victorian Heritage Register, affirming its rightful place in Victoria’s history and Melbourne Water’s place in community.

Last updated:
13 August 2021