Flightline Aviation helicopter service manager Pete James said more than 6cm of floodwater covered the concrete floor of the company's hangar on Saturday morning.
Nearly 30 helicopters inside got ``wet feet''.
The floodwater did not enter the office space.
``We got away with it lightly.''
However, the underground tank containing aviation fuel remained underwater yesterday.
An alarm sounded yesterday, warning the fuel could have been contaminated with water.
Read more: https://www.odt.co.nz/news/dunedin/contamination-aviation-fuel-feared