The member of the public then assisted him to handcuff the man.
Acting West Coast Area Commander Inspector Iain McKenzie said the response from the community in assisting the officer was outstanding.
"Constable Gurney has significant experience as a sole charge officer in remote communities so he certainly knows how to manage these situations."
"He made a good call in ensuring he had back-up before approaching the offender.
"The outcome yesterday was a credit to everyone involved and I can't thank those community members enough for their response," he said.
Constable Gurney recently returned to the West Coast after a period as the sole officer at New Zealand's most remote police outpost in the Chatham Islands.
A 53-year-old Haast man will appear in the Greymouth District Court today facing assault and intentional damage charges.