Utah is the nation's biggest proponents and user of the bridge construction method that was used in the Florida bridge that collapsed.
The allegations were made in a lawsuit that was later settled.
Witnesses told local media the vehicles had stopped at a traffic light when the bridge collapsed on top of them at around 1:30 p.m. ET (1730 GMT). But the state document said FIU had selected a contractor that was not "pre-qualified for this service, which is required under FIU's agreement with the state".
DeFebo says Figg Bridge Engineering designed three bridges on the Turnpike. Rubio did not offer further details, and neither FIGG nor MCM companies immediately responded to queries about the senator's claim. This pedestrian bridge was supposed to open in 2019.
Munilla Construction Management, a Miami-based construction management firm, won the bridge contract with FIGG Bridge Engineers of Tallahassee.
It' not yet clear why the bridge collapsed, although some have said it may be because of the new construction method known as Accelerated Bridge Construction, which is a quicker and less disruptive method of bridge building. FIGG said in a statement "in our 40-year history, nothing like this has ever happened before".
Engineers and transportation departments officials, including here in OR, will monitor the investigation into the cause.
In 2007, the Interstate 35W bridge collapsed in Minneapolis, killing 13 people and injuring 145.
FIGG Engineering, the company that designed the bridge, said they have more than 230 bridges across the US and they had never seen this type of collapse.
Miami-Dade Police Director Juan Perez told reporters Friday he expects additional victims to be found as the massive concrete structure is removed.
"Everything we do has safety first, and we take safety seriously, and first and foremost", said Foringer.
The death toll is at least six, including 18-year-old Alexa Duran, a student at the school. No identities have been released.
At a news conference Friday night, officials from the National Transportation Safety Board said they have just begun their investigation, and can not yet say whether any cracking contributed to the collapse.
Miami-Dade Mayor Carlos Gimenez said that crews were conducting a stress test on the bridge at the time, even though the FDOT said it was not aware of the test and did not issue a request to shut down all eight lanes of Southwest 8th Street.
Sen. Bill Nelson has asked the Department of Transportation to turn over all records related to the design, construction, safety and inspection of the project.
The crowd helped a woman up onto the bridge - she was a doctor at FIU, she said.
They were searching for bodies near Florida International University. Alvaro Alvaro Zabaleta says the operation has turned from rescue to recovery.
Both companies expressed condolences for the victims and promised cooperation with investigators. People threw a couple of backboards up so the workers could be stabilized and taken down.
The 950-ton bridge collapsed Thursday.
Details have yet to be released from the state's investigation that began on Thursday.
Experts from the National Transportation Safety Board and the Occupational Safety and Health Administration joined police in taking over command of the scene Friday from first responders, who had spent hours racing to find survivors in the rubble of the 175-foot span using high-tech listening devices, trained sniffing dogs and search cameras.
The goal of the $14 million project was to provide a safe path over the busy highway after the death of an FIU student a year ago. The bridge connected the university campus to the small suburban city of Sweetwater, where many students and faculty live.