Lake Macdonald Dam Safety Upgrade

At Seqwater, some of the dams we operate were built decades ago and, just like cars, they need regular maintenance to keep them in good working order and meet changing safety standards.

Lake Macdonald is one of a number of dams in South East Queensland to be upgraded as part of Seqwater’s Dam Improvement Program over the next five years.

This will be the first major upgrade of the dam since the walls were raised in 1980. It will involve building a new spillway and reconstructing the existing earth embankments to better protect the dam against earthquakes and extreme floods.

Impact assessment

Seqwater is seeking feedback on the potential impacts of the project and ways to avoid or reduce them. Feedback you provide will form part of the Impact Assessment Report (IAR), which is required by the Coordinator-General under the State Development and Public Works Organisation Act 1971. Areas of impact to be assessed include, but are not limited to, traffic, noise, dust, water quality, recreation, cultural heritage, and ecology.

The public consultation period for the draft IAR has now closed. Once the IAR is drafted it will be made available for the public and government agencies to comment.


At Seqwater, some of the dams we operate were built decades ago and, just like cars, they need regular maintenance to keep them in good working order and meet changing safety standards.

Lake Macdonald is one of a number of dams in South East Queensland to be upgraded as part of Seqwater’s Dam Improvement Program over the next five years.

This will be the first major upgrade of the dam since the walls were raised in 1980. It will involve building a new spillway and reconstructing the existing earth embankments to better protect the dam against earthquakes and extreme floods.

Impact assessment

Seqwater is seeking feedback on the potential impacts of the project and ways to avoid or reduce them. Feedback you provide will form part of the Impact Assessment Report (IAR), which is required by the Coordinator-General under the State Development and Public Works Organisation Act 1971. Areas of impact to be assessed include, but are not limited to, traffic, noise, dust, water quality, recreation, cultural heritage, and ecology.

The public consultation period for the draft IAR has now closed. Once the IAR is drafted it will be made available for the public and government agencies to comment.


Tell us what you know about Lake Macdonald and the surrounding area to help us better understand the lake's attributes

3 months

Help us better understand the attributes of Lake Macdonald. Please tell us what you know about Lake Macdonald Dam and the surrounding area.

We have already placed pins at a few locations identifying project issues and potential impacts we know about.

Drop a pin on the map to share your local knowledge, ask a question about the project or suggest a way to reduce impacts. You can even add a photo to your pin.

Instructions for dropping a pin:

  1. Zoom into the area you would like to place a pin by using...

Help us better understand the attributes of Lake Macdonald. Please tell us what you know about Lake Macdonald Dam and the surrounding area.

We have already placed pins at a few locations identifying project issues and potential impacts we know about.

Drop a pin on the map to share your local knowledge, ask a question about the project or suggest a way to reduce impacts. You can even add a photo to your pin.

Instructions for dropping a pin:

  1. Zoom into the area you would like to place a pin by using the + or – icon at the bottom right hand of your screen.
  2. Select the relevant pin and drag it to a location you would like to highlight that’s important to you.
  3. Complete the comment section, ask a question and/or add an image.
  4. Continue until you have identified all the issues at the locations that are important to you.