Sellicks Beach Road Erosion Control

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Consultation has concluded

May update

Sellicks Beach Road Drainage project commenced on site Monday 19/04/21. All new pits have now been installed, laying of new pipe line is underway.

The project is tracking well, we are currently running ahead of schedule and are projected to have completed the project by late July (pending weather).

Background

The City of Onkaparinga recognises that the erosion of the southern verge of Sellicks Beach Road has been an ongoing issue for several years. We have looked at a robust and permanent solution to address the issue, which we anticipate can be completed by winter 2021.

Stage 1 construction will address the erosion and scouring of the verge only. Upstream and downstream deficiencies which currently exist will be addressed and prioritised against other projects within our Project Capital Works program at a later stage.

An overview of Stage 1 of the project is provided below:

  • Construction of a connection pit at the headwall at the south west corner of the intersection of Country Road and Sellicks Beach Road to collect flows from upstream catchment areas.
  • Construction of an underground pipe drainage system sized to carry the 100-year storm flows, running along the south side of Sellicks Beach Road
  • Construction of regularly spaced field gully pits along the pipeline to ensure that surface flow from part of Sellicks Beach Road and the road verge is captured and directed into the underground drainage system.
  • Construction of a shallow swale above the pipeline to carry intermediate flows to the inlet pits.
  • Construction of an overflow pit at the end of the erosion gully where the water will surcharge under storm conditions and flow along the south side of Sellicks Beach Road without creating erosion.
  • Construction of a small diameter pipe from the overflow pit to the existing side entry pit to carry low flows and avoid regular surcharge.
  • Reshaping and implementation of landscaping within the swale in line with anticipated flows.

View the stage 1 concept plan here

Stage 1 construction has commenced and is anticipated for completion in winter 2021.

Stage 1 will address the erosion and scour issue of the swale adjacent Sellicks Beach Road. Upstream and downstream deficiencies will be addressed and prioritised at a later stage, subject to council priorities and funding. An overview of Stage 1 work includes:

  • Construction of a headwall at the south east intersection of Country Road and Sellicks Beach Road to control initial flows from catchment areas.
  • Construction of an underground pipe drainage system running along the south side of Sellicks Road under the existing swale.
  • Construction of a system of field gullies along the swale to ensure that surface flow from part of Sellicks Beach road and the embankments of the swale is captured and directed into the underground drainage system.
  • Construction of an overflow pit at the end of the swale where the water is expected to move along the south side of Sellicks Beach Road without creating erosion.
  • Reshaping and implementation of landscaping of the swale are in line with anticipated flows.Prior to the commencement of construction work we want to provide an opportunity for members of the community to ask questions and seek further information about the project.

Community information session - via Zoom

This session has concluded due to no attendance.

If you have any questions, please don't hesitate to contact us on 8384 0666 or email us at mail@onkaparinga.sa.gov.au.

Prior to the commencement of construction work we will be providing an opportunity for the community and interested stakeholder groups to ask questions and seek further information about the project.

To facilitate this, we will be holding an information session on Friday, 11 December 2020 via Zoom between 2-3pm, where staff will be available to answer any questions you have about the drainage upgrade. Click this link https://onkaparingacity.zoom.us/j/97291811578 to join us on zoom.

Please note that a separate engagement is currently underway for the Sellicks Beach Structure Plan and you can leave your feedback for that project at Draft Sellicks Beach Stucture Plan until 21 February 2021.

Do you have any questions about the Sellicks Beach Road drainage upgrade?

Just leave your question below and we'll aim to get back to you within 48 hours (during business hours).

May update

Sellicks Beach Road Drainage project commenced on site Monday 19/04/21. All new pits have now been installed, laying of new pipe line is underway.

The project is tracking well, we are currently running ahead of schedule and are projected to have completed the project by late July (pending weather).

Background

The City of Onkaparinga recognises that the erosion of the southern verge of Sellicks Beach Road has been an ongoing issue for several years. We have looked at a robust and permanent solution to address the issue, which we anticipate can be completed by winter 2021.

Stage 1 construction will address the erosion and scouring of the verge only. Upstream and downstream deficiencies which currently exist will be addressed and prioritised against other projects within our Project Capital Works program at a later stage.

An overview of Stage 1 of the project is provided below:

  • Construction of a connection pit at the headwall at the south west corner of the intersection of Country Road and Sellicks Beach Road to collect flows from upstream catchment areas.
  • Construction of an underground pipe drainage system sized to carry the 100-year storm flows, running along the south side of Sellicks Beach Road
  • Construction of regularly spaced field gully pits along the pipeline to ensure that surface flow from part of Sellicks Beach Road and the road verge is captured and directed into the underground drainage system.
  • Construction of a shallow swale above the pipeline to carry intermediate flows to the inlet pits.
  • Construction of an overflow pit at the end of the erosion gully where the water will surcharge under storm conditions and flow along the south side of Sellicks Beach Road without creating erosion.
  • Construction of a small diameter pipe from the overflow pit to the existing side entry pit to carry low flows and avoid regular surcharge.
  • Reshaping and implementation of landscaping within the swale in line with anticipated flows.

View the stage 1 concept plan here

Stage 1 construction has commenced and is anticipated for completion in winter 2021.

Stage 1 will address the erosion and scour issue of the swale adjacent Sellicks Beach Road. Upstream and downstream deficiencies will be addressed and prioritised at a later stage, subject to council priorities and funding. An overview of Stage 1 work includes:

  • Construction of a headwall at the south east intersection of Country Road and Sellicks Beach Road to control initial flows from catchment areas.
  • Construction of an underground pipe drainage system running along the south side of Sellicks Road under the existing swale.
  • Construction of a system of field gullies along the swale to ensure that surface flow from part of Sellicks Beach road and the embankments of the swale is captured and directed into the underground drainage system.
  • Construction of an overflow pit at the end of the swale where the water is expected to move along the south side of Sellicks Beach Road without creating erosion.
  • Reshaping and implementation of landscaping of the swale are in line with anticipated flows.Prior to the commencement of construction work we want to provide an opportunity for members of the community to ask questions and seek further information about the project.

Community information session - via Zoom

This session has concluded due to no attendance.

If you have any questions, please don't hesitate to contact us on 8384 0666 or email us at mail@onkaparinga.sa.gov.au.

Prior to the commencement of construction work we will be providing an opportunity for the community and interested stakeholder groups to ask questions and seek further information about the project.

To facilitate this, we will be holding an information session on Friday, 11 December 2020 via Zoom between 2-3pm, where staff will be available to answer any questions you have about the drainage upgrade. Click this link https://onkaparingacity.zoom.us/j/97291811578 to join us on zoom.

Please note that a separate engagement is currently underway for the Sellicks Beach Structure Plan and you can leave your feedback for that project at Draft Sellicks Beach Stucture Plan until 21 February 2021.

Do you have any questions about the Sellicks Beach Road drainage upgrade?

Just leave your question below and we'll aim to get back to you within 48 hours (during business hours).

CLOSED: This discussion has concluded.
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    Will the pine trees still remain on Sellicks Road?

    Antonio Mercurio asked 5 months ago

    Thanks for your question. The removal of the pine trees is not part of the scope of works and the trees will remain.