The Occupational Safety and Health Administration is investigating the injury, and Hodgson's family asked not to be named while the inquiry is under way.
Hodgson, 33, loves to exercise and had been training to run a marathon this year, a family member said. Now he's having to consider a future without at least one of his legs, the relative said.
On Saturday, Hodgson was initially in serious but stable condition, with his legs intact, and off the ventilator sooner than anticipated. Doctors said he would have been in worse condition without the strength he developed while training for the run, his family said.
But his right leg took a turn for worse on Saturday, and Hodgson had to go back into surgery.
A hospital representative said Saturday night that Hodgson was in critical condition.
For the next week, Hodgson is expected to be in and out of the operating room, possibly every other day, as doctors remove pieces of damaged bone, muscle and skin, his family said.
They started a fund at American First Credit Union to help with medical costs. The account is under "The Hodgson Family," and donations can be made at any branch.