The West Coast Regional Council rockwork buffering the Hokitika Beach headland, behind the Revell Street residential area, was undermined following a storm which hit the region from April 9-12.
The section of beach - between Beach and Hampden streets - was scoured out leaving a rock overhang, which posed a potential fall risk for beach users below, council said.
Acting catchments manager Shanti Morgan said the emergency work in the past 10 days to fix that had included re-positioning rock moved during the recent storm and adding extra material to remediate the worst erosion.
The area is an active habitat for the kororā, or little blue penguin, which breeds and moults on the Hokitika foreshore.
Ms Morgan said council had worked with the West Coast Penguin Trust and the Department of Conservation (Doc).
The breeding cycle for kororā in vegetation on the foreshore was quite broad, meaning the presence of penguin at any time, she said.
"Fundamentally, they could be in their nests at any time of the year."
She was disappointed, given the Trust and the council had agreed protocols around emergency rock work in penguin habitats.
The council's decision on April 12 to start work meant the trust was not on the ground to point out the area is still an active breeding area, she said.
"The decision was made quite quickly without the people being involved who know that."
When Ms Perkins became aware of the work the following day she asked the contractor to stop clearing vegetation due to the penguin nesting site.
The contractor was "very responsive".
Ms Perkins said there had been no need to remove vegetation to do the emergency work, based on their previously agreed protocol with council around access to such work areas. The protocol was to construct a ramp to get access down to the beach.
"It was hugely disappointing that all the submissions, all the collaboration with council putting in signs and the GPS (co-ordinates), that none of that had come before those that were making an urgent decision. It is just frustrating ... why isn't this front of view?"
However, she said the council had then been "immediately responsive" when the issue was raised.
Ms Morgan said the team considered all adverse environmental impacts prior to works occurring, including assessing the time of year penguins typically nest (July to November).
"Being outside this key season, there is very little penguin presence in the area."
Work was completed under emergency consent conditions as a risk to public safety was identified, she said.
"Overhanging rock that could potentially fall on beach users was removed and the site secured, making the best use of onsite material.
"Disturbance of overhanging vegetation was kept to a minimum and only removed what was necessary to ensure public safety."
Meanwhile, a proposal to do further work would be discussed at the first meeting of the Hokitika Joint Committee on May 6.
This would detail options for reinstating protection against the coastal hazard.
A long-term solution and advancing a consent application is in train to extend the existing 2013-built Hokitika Seawall north as well addressing coastal inundation on the Hokitika River side.
"A hearing date to be set by the Independent Commissioner is currently pending."
- By Brendon McMahon
Local democracy reporter
