NZSki has been found guilty of breaching health and safety obligations - after the death of a skier in Queenstown four years ago

60-year-old Anita Graf-Russell died after colliding with a wooden fence post at the bottom of a Coronet Peak skiing trail.

Worksafe uncovered a 2014 document from a ski patrol staffer - which gave a number of fencing areas a high safety rating, when they shouldn't have.

The operator's been found guilty this August of breaching these obligations.

It must pay almost six hundred thousand dollars in fines.