Port Lincoln Yacht Club raises stormwater outlet issues

DRAINED: Port Lincoln Yacht Club commodore Craig Bascombe with the channel that had been created from stormwater flowing from the erosion-affected outlet matting, directing water toward the boat ramp and channel the club uses to launch boats. Photo: Jarrad Delaney
DRAINED: Port Lincoln Yacht Club commodore Craig Bascombe with the channel that had been created from stormwater flowing from the erosion-affected outlet matting, directing water toward the boat ramp and channel the club uses to launch boats. Photo: Jarrad Delaney

Port Lincoln Yacht Club has called for a long term fix to issues involving the stormwater outlet next to the club's boat ramp on the foreshore, including the erosion-affected matting and water flow times.

The outlet at the yacht club end of the beach was a part of the Eyre Street Pump Station upgrade to reduce the risk of flooding in the Eyre Street/Liverpool Street area, as part of the council's Stormwater Management Plan.

However the yacht club has raised issues with the outfall matting, with one side having sunk due to erosion and causing water from the drainage canal to flow towards the boat ramp, bringing sand and silt into the channel the club uses to launch boats into the bay.

Club commodore Craig Bascombe said another major issue arose as one day drainage started while the club was using the beach, with equipment laid out on the sand.

"We had boat trailers, a tractor and bits and pieces there when it started," he said.

"We've had the tractor bogged twice now on the beach."

Port Lincoln City Council chief executive officer Matthew Morgan said the council had met with the yacht club on this issue and was engaging with engineers Tonkin Consultants to redesign the outlet.

He said the issue with erosion of the beach around the matting had been something the council had looked at for close to 12 months.

"It's got to a point where we have to look at redesigning the outlet because what's there at the moment is not working," he said.

"In 2017/18 when the project commenced it resolved a huge issue along Liverpool Street in terms of flooding."

Mr Morgan said the council would also look at improvements to the Eyre Street pump station such as installing humidity sensors so the pumps would not switch on during the middle of the day when the beach was being used.

"The pump outlet works on a float system, when the water reaches a certain level the pump turns on and starts pumping out water, at the moment it does that regardless of the time of day," he said.

"We will look at changing the control around the pumps so it doesn't pump out in the middle of the day unless a rain event is happening."

EROSION: One side of the matting under the stormwater outlet on the beach has sunk due to erosion. Photo: Jarrad Delaney

EROSION: One side of the matting under the stormwater outlet on the beach has sunk due to erosion. Photo: Jarrad Delaney

The council is planning an early December workshop with the yacht club and Tonkin Consultants to come up with solutions.

However Mr Bascombe said the yacht club had been against the positioning of the outlet at the yacht club end since it was conceived and felt it had affected the yacht club and everyone who used that end of the beach.

"The outfall is above the high tide mark, you're never going to get sand replenishment," he said.

"I blame the previous council for taking the cheapest option and wrecking the town's beach."

Mr Bascombe said he commended this council for trying to fix the issues but the club would ideally like to see the outlet moved offshore to a different location.

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