Encroachment by heavy seas checked
ODT By Allison Rudd on Mon, 27 Jul 2009
It was estimates $50,000-$60,000 had been spent at Middle beach in the past few days trying to protect rock mattresses laid at the base of the dunes, which had been exposed by last week's heavy seas, and trucking in sand dredged from Otago Harbour and tipping it down the face of the dunes.He estimated the width of the dunes had decreased by 2m-3m in the past two years.The end of Moana Rua Rd fell away last Thursday, and the face of the dunes was now close to a large fence erected in 2007 to stop people from using a dune-top track which has also since succumbed to the sea.
It was difficult to believe the Moana Rua surf club building had once sat between the end of the road and the beach, he said.
"When we demolished that [in 2001] there was a lot of criticism. People said it would have made a good restaurant. But the area it was sitting on does not exist any more."
UPDATE 25th July 2009 article from ODT
"It's as serious as it's been since the emergency [in 2007]."
Contractors next week would build a new mattress and place it behind and beneath the existing ones.



Above left: pulled back view , right: closer view of the digger work at Moana Rua, where in the last two days they have delivered truckloads of sand over the edge of the road, and replenished sand over the rock mattresses and boulders recently exposed at the base, as seen below:
Below left: the digger arrives, and first thing it tasks to is to dig up the scattered boulders on the sand(as seen in pic above)and place them on top of the rock mattresses. They are now all gone. Now, I understand that removing these actually cause more erosion. I was told that this was done at St Clair when they were building the new sea wall. Rocks were removed from the shoreline which caused significant lowering of the beach profile. They are actually needed to retain sand. Any thoughts on this?
Above right: damaged and exposed rock mattresses.
Article "Tides flood roads, erode dunes" at ODT.
Below, today St Clair, a good fill of sand at the base of the sea wall.
Motel progressing well, I think its looking pretty good!
Dunedin beaches seriously eroded
ODT By John Lewis on Thu, 8 May 2008
Dunedin City Council parks and reserves team leader Martin Thompson said there had been significant loss of sand and some localised erosion, which had exposed the sand sausages to the east of the wooden groyne.
‘‘Work to recover these will be carried out over the next few days, along with the transportation of dredged sand to replenish the stockpile at the eastern end of the beach,'' he said.
The top of the ‘‘reno mattress'', which was installed near Moana Rua Rd in July 2007, had also been exposed. However, no significant erosion had occurred at this stage.
Since last June, the council had spent nearly $1.2 million on repairing and controlling the erosion, and about 30,000 cubic metres of sand had been moved or replaced in the area.









