Ministry of Labour requests a number of documents related to the April 6 incident
The request is the third from the Ministry of Labour regarding the fatal incident.
According to Ministry of Labour spokesperson Bruce Skeaff, Vale met its initial deadline to provide documents relevant to the investigation.
In addition, Vale had until April 16 to provide the Ministry of Labour with supervisors reports, equipment settings and various work procedures.
Rochette, 36, was killed April 6 from severe head trauma.
According to United Steelworkers Local 6500 president Rick Bertrand, Rochette was killed when a pin from a crusher broke off and was released under high pressure.
A 28-year-old industrial mechanic was injured during the same incident.
On April 11, Vale and the United Steelworkers announced they would conduct a joint investigation on the fatal smelter accident.