A marine crane was employed in Kelowna, B.C., on Friday to right a houseboat that capsized early Thursday, killing one young woman and sending more than 60 other revellers into Okanagan Lake.

Investigators are now examining the Quintana Roo in an attempt to find out why it tipped over as the party-goers were singing Happy Birthday to a friend – a chilling scene that was captured on home video.

The boat was taken out of the water to allow a full investigation.

Houseboat raised in Kelowna, B.C., Friday.

RCMP are calling the boat a crime scene because of the death of 20-year-old Camille Fry, who was trapped in a washroom aboard the vessel when it flipped.

She needed CPR when she was finally pulled from the water, and later died in hospital.

Orginally from 100 Mile House, B.C., Fry had moved to Kelowna after graduating from high school and was working in a local restaurant.

The houseboat moments before it capsized in Kelowna on Wednesday night.

"It's more than just an evening's fun now," said local resident Earl Ashcroft, who stood watching the scene Thursday. "It's a real tragedy."

B.C. Solicitor General Rich Coleman said Transport Canada and the RCMP will try to determine how many people were on board when the boat capsized about 100 metres offshore.

The investigation will also consider the design of the boat.

Vern Johnston of Diving Dynamics underwater salvage said the initial inspection has already raised a concern with inspectors from Transport Canada.

The houseboat is kept afloat with three metal pontoons, and Johnston said the middle pontoon on the Quintana Roo is much wider than the outer pontoons.

"The issue would be that elevation of that third pontoon," he said. "It's much deeper, which in turn changes the centre of gravity to the midline of the boat. So all the weight goes onto that one pontoon, which is why they pivot like that."

The houseboat belongs to Okanagan Waketours, a company whose website promotes party cruises. A notice posted on the site says a maximum of 30 people should be on board the Quintana Roo at one time.

The company referred all questions about the incident to a statement on its answering machine.

"Whenever anything like this happens, including loss of life, it is regrettable," the message says.

"The boat was rented to third-party users in accordance with our normal business practices. As soon as we have received the results of the investigation, we will consult with our insurers."

On Thursday, some who were on the boat said the company provided a skipper who was in charge at the time of the disaster.

Home video from the party shows the boat rolling over about 30 seconds after the group gathered on the top deck had finished singing Happy Birthday to someone named Tyler.

"Please stay tuned for reckless screaming and chaos," someone's voice says on the video seconds before the boat starts to tip.