Millbrook Reservoir

Millbrook Reservoir

The construction of the Millbrook Reservoir spanned the years of the First World War: 1914 to 1918. The reservoir was built to control flows in the upper reaches of the River Torrens. It also gave us a reservoir in the Mount Lofty Ranges that is high enough to supply water using gravity feed to Adelaide's eastern suburbs.

The reservoir is named after the small town of Millbrook, which used to be above the dam wall.

Despite claims many of the old buildings of Millbrook still exist beneath the waters, they're not true. The abandoned buildings in the storage area, like Miss Adey's Private School and the Millbrook Hotel, were all demolished and cleared away before the reservoir was filled.

The old bridge over the Torrens was however left intact. During a severe drought in 1955 when the level of the reservoir dropped to a record low, the old bridge became visible for the first time in nearly 40 years.

In the 1970s, the nearby small town of Chain of Ponds was also demolished. This occurred to safeguard against any pollution of the water in the reservoir.

Water is now released from Millbrook Reservoir back into the Torrens to supplement water into the Kangaroo Creek Reservoir.

Capacity: 16,500 megalitres.

If this reservoir supplied the whole state, how long would this last? About 28 days.

Area of water spread: 178 hectares.

Public access: No.

Current reservoir capacity: For current volume please click on the map below.

Millbrook spillway widening - 2006

Millbrook embankment construction - 1916

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Total Millbrook Reservoir level
  • 53
  • 51

Capacity, volume and rainfall levels across reservoirs supplying metropolitan Adelaide, compared to last month last year
Capacity (GL) Volume this week (GL) Volume this week (%) Volume this week last year (GL) Average Volume this month (GL) Rainfall this week (mm)
15.78.35388.715.00

  • Major faults

  • Underway

  • Nioka Rd
  • Dernancourt
  • 22/05/2019
  • Water Supply Interrupted
  • Last Updated: 22/05/2019 06:20 AM - We are on site in Dernancourt and the nearby water supply may be unavailable until 22/05/2019 12:00 PM. Sometimes our crews need to temporarily interrupt the water supply to our customers and/or manage traffic while they are working. We always aim to minimise inconvenience by restoring supply as safely and quickly as we can. Reference Number WO: 06942825.
  • See all major faults

  • Scheduled works

  • Underway
  • Delhi Av
  • Hillcrest
  • 22/05/2019
  • Temporary Supply Interruption
  • Estimated start time and water supply off: 23/05/2019 09:00 AM
    Estimated restore time and water supply back on: 23/05/2019 06:00 PM

    We’re improving your services and undertaking maintenance work in Hillcrest. Sometimes our crews need to temporarily interrupt the water supply to our customers and/or manage traffic while they are working. Temporary traffic management may remain in place until reinstatement of the impacted road is complete. We always aim to minimise inconvenience by restoring services as safely and quickly as we can.


  • See all scheduled works

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