Roger King of Waipu Reserve Board was yesterday overseeing seven trucks and diggers driven by local farmers, as they trundled up and down the beach scooping up the algae and transporting it to a nearby paddock. He said "good on [the council] for leaving us to it".
While the current smell was not yet overpowering, Mr King said this would change if the mass was left to rot.
"It's got to be done immediately. Last time we waited for permission for a couple of days and it made it very hard to get it off ... But if it gets bad in the long term then NRC should be taking responsibility."
The "last time" Mr King referred to was in November, when a smaller amount of the seaweed prevented swimming. The current patch was about 400m long and 25m wide.
"I wouldn't want any kids going in it," he said of the swamp of seaweed.
Waipu-based marine biologist Andre Labonte was out collecting samples yesterday morning and said the effort to clear the algae was "amazing".
"This is what small communities can do. These guys are stepping up and it's a big ask when they've got their own businesses to run. So hats off to them."
Mr Labonte was sending samples to Niwa in Wellington, who would be able to identify the species with certainty as well as tell whether the farmer who had the algae dumped on his field would benefit from it as a fertiliser.
NRC had also received reports of the algae at Langs Beach, Oakura and Te Haumi.
In February 2013 large quantities of algae were left to rot on the beach at Waipu Cove while locals endured the putrid stench.
Mr King, who has lived at the Cove for 25 years, said: "The volume of weed this time is just major. This time is the worst by far I've seen. Where it's piled up in some places it's almost waist-deep." Yesterday morning volunteers cleared about 400 tonnes of seaweed and planned to continue working until the area was back to normal. "On Sunday there were heaps of people coming to have a look. But if it keeps happening people won't come, if the beach is known to be like this," Mr King said.
Camp Waipu owner/operator Anton Trist said a couple of campers had cancelled their bookings as a result of the weed.
Mr Dall said NRC was working towards an overarching consent for removing "nuisance seaweed" so it could legally deal with similar situations in the future: "Currently our regional plan doesn't provide for it."
He said volunteers had been advised on how to carry out the work in a way that would not damage the beach. Mr Dall believed the seaweed was Spyridia filamentosa.
Recent stormy weather "upwelling" nutrients and the El Nino weather pattern may have contributed to the algae's proliferation.
