Road washouts are threatening to cut off a small community on the Mahia Peninsula, best known to most of New Zealand as the home of Rocket Lab's launch site.

Members of the community say they are frustrated with the amount of time it is taking to fix the three washouts on Mahia East Coast Rd.

Resident Denis Murphy said the community is already almost cut off, with several areas of the road already one way.

"Anywhere else in New Zealand, if you had a road like that, you wouldn't be allowed to drive past it."

Local resident Denis Murphy inspects the largest dropout caused by erosion on Mahia East Coast Road.

The washouts have been happening