A mechanical arm gently places a large rock from the
Blackhead Quarry in front of the St Clair sea wall.
A section of the St Clair sea wall is being reinforced
with up to 300 tonnes of rock in an effort to hold back the
pounding surf this winter.
Fulton Hogan staff would spend the rest of the week placing
rocks at the ''toe'' of the sea wall, near the recently
removed beach access ramp, Dunedin City Council roading
maintenance engineer Peter Standring said.
The contractors would be trucking the material to the
Esplanade at St Clair, where it would be lowered on to the
beach and positioned next to the sea wall using a mechanical
excavator, he said.
Contractors removed the remaining section of the St Clair
Surf Life Saving Club's beach access ramp over the weekend.
The ramp had been blamed for creating turbulence in the
water, but its removal had shown rocks positioned at the toe
of the wall - to help protect against further sinkholes on
the Esplanade above - had been washed away, Mr Standring
Sand covering the toe of the sea wall was down to about 1m in
the area, ''which is getting to sort of dangerous levels''.
''Once it gets to the bottom of the toe, then everything
starts leaking out from behind and we start getting the
damage to the promenade.''
Work to replace the rocks, together with the removal of the
ramp's remains last weekend, was expected to cost the council
''tens of thousands'' of dollars, although exact figures were
not available yesterday, he said.
However, ongoing monitoring and maintenance work - likely to
be required every six months - was expected to be ''par for
the course for the foreseeable future'', Mr Standring said.
City councillors, deliberating on the council's 2014-15
annual plan last month, approved a new interim risk
management plan, and a $95,000 budget, for the work over the
Mr Standring said the area was susceptible to the ebb and
flow of tide and sand, but the council was trying to be
''Rather than just accepting that's how things go, we are
actually trying to take some sort of action as well, just to
shore things up as these things happen.''