Janis was injured during a football practice on April 18 while defending a pass and missed the rest of spring football.
The operation, which took place on May 3 at James Cook University Hospital, was unsuccessful, and Janis woke to find both her legs had been amputated.
Janis helped found PWC in 1980 to advocate for women and other "non-traditional populations" in the construction industry.
Janis turned to food and wine after her dad's death 10 years ago.
A big thank you to Janis and all of the competitors who took part in the Internet of the Backyard competition," said Dianne Kibbey, global head of community, element 14.
Janis spoke to a relative on the afternoon of the day she disappeared but she was reported missing at just after 10.
Today we salute an American original, Janis Joplin, said Megan Brennan, chief operating officer and executive vice president.
One of the world's greatest pianists, Janis has had a long, distinguished career.
Janis was a cleaner at the university who was studying part-time to become an occupational therapist at the HQ Hospital of the International Grenfell Association in St Anthony, Newfoundland.
Supt Mick Paterson, of Northumbria Police's Northumberland Area Command, said: "I want to thank those who attended the public meeting in Catton this week in relation to the disappearance of Janis Hall.
I consider Janis a lifelong friend and a combat brother.
She loved and respected her family too much for that," the Sun quoted Janis as saying.