Dirt jumps project update

We are working with local riders to improve and maintain dirt jump tracks and sought your input! This pilot project was chance to help design and build the jumps you ride!

We are currently progressing works at our dirt jump locations in O’Halloran Hill and Seaford.

Below is a summary of the status for each site. Please visit the individual project pages for detailed information and updates.

Serpentine Reserve, O’Halloran Hill

Update about the temporary closure of the Serpentine Reserve BMX track after asbestos was found at the site in late 2025.

Recent work to remediate (clean up) the soil uncovered small amounts of friable asbestos (soft, crumbly or loose fibres) underneath the track surface.

Following identification of friable asbestos-containing material within subsurface soils at the site, contractors paused works while safety controls and remediation methodology were reviewed and SafeWork SA was notified.

Although friable asbestos requires stricter management controls than bonded asbestos-containing material, expert advice provided to the council indicates the potential health risk to the general public is likely to remain low, given the material was identified below the surface and airborne fibre monitoring undertaken during works has reported concentrations below laboratory reporting limits.

We also confirm that:

• the majority of asbestos-containing material identified to date has been bonded (non-friable) asbestos
• visible asbestos-containing material identified on the surface has been removed as part of remediation works undertaken to date
• the friable asbestos-containing material recently identified was located beneath the soil surface, not on the surface
• the site remains securely fenced with warning signage in place
• airborne fibre monitoring and soil investigations are continuing.

Onsite work will start again on Tuesday 12 May 2026, with a continuation of soil remediation, soil testing and disposal of all the dirt jumps soil from the site.

Once that’s been completed, we’ll bring in new, certified clean soil to rebuild the BMX track from scratch. The design will be the same one that was endorsed after community engagement last year.

The track is still anticipated to reopen in mid-2026, and we can’t wait to see the community hitting the jumps again!

Until this work is completed, we have 23 other designated bike jump sites across the City of Onkaparinga for you and your family to enjoy, which you can find at onkaparingacity.com/bmx

We recognise the strong community interest in this project, and we appreciate your patience and understanding during this important remediation work.

For those concerned about the potential health impacts of asbestos and for further information, resources are available at www.asbestos.sa.gov.au

We’ll continue to provide updates on this Your Say Onkaparinga webpage as works progress.

If you have any questions or require further information, please contact our Customer Relations team on 8384 0666 or mail@onkaparinga.sa.gov.au.

The Quarry, Seaford

Community feedback has been incorporated into a final concept plan for the revised dirt jumps at The Quarry.

In response to recent challenges experienced at Serpentine Reserve, construction at Seaford Quarry will be delivered entirely by an appointed contractor to ensure all safety and compliance requirements are met.

Construction will commence during the week starting 27 April 2026.

For detailed updates, timelines and project information, please visit the relevant location page below.

Keep in the loop

Want to play a key role in upgrading your local jump site or skate park? Want to create your own Southern Riders event? Or perhaps you just want to be the FIRST to know when the next awesome pop-up event is being hosted?

Then please register with our ‘keep in the loop’ page or email Nadia Yacoubi at youth@onkaparinga.gov.sa.au for more information!

Background

This pilot program is all about fixing and maintaining the jumps that are already here. It’s NOT a full rebuild or upgrade. So:

• No new jumps will be added, but we might reshape or adjust the current ones to make them safer and better to ride.
• There will not be any new extras like benches, lights, or toilets.
• No trees will be removed.
• All changes will stay within the current dirt jump area – no big changes or extensions.