Timaru District Council Group Manager Corporate Services Tina Rogers said that it's a baffling theft, considering how distinctively marked the toilet is, and the fact it was surrounded by a chain fence and bollards.
"We're stumped as to why someone would go to the not inconsiderable effort to steal the toilet. It isn't even a self-contained unit that could be easily put to another use," she said.
"There was the initial thought that the storm may have blown it away, but on closer inspection the bolts holding the toilet on have been carefully removed, so someone has gone onsite, unbolted the toilets, removed the chimney from the holding tank and lifted it over the boundary fence.
"We're now facing a $5000 bill to reinstate a toilet at this site, and we're considering the option of removing it each winter to stop it disappearing again."
There are two other toilet blocks at Te Moana Gorge that are still open.
If anyone spots a TDC-marked toilet somewhere where it shouldn't be, they're asked to please email enquiries@timdc.govt.nz.