A British couple is suing Blackcomb Mountain and the manufacturer of its ski lifts after the couple’s four children were involved in a gondola accident at the resort just before Christmas last year.

The Hargraves’ children and a friend were among 53 people trapped inside several gondola cabins after a tower supporting the lift partially collapsed and the line sagged.

Nancy Wilhelm-Morden, the Vancouver lawyer representing the Hargrave family, told CBC News the family was traumatized by the incident. She said the children suffered soft-tissue injuries and were psychologically affected.

Investigators determined the tower collapsed when water leaked inside, froze and expanded, causing a joint to crack.

In total, 13 people were treated for minor injuries.