The 4.7-mile train was said to have completed a 534-mile test run on October 17, from Saldanha Bay on South Africa's western coast, to an inland ore mine.
Under existing rules outlined in the federal Trade Secrets Act, the names and locations of companies involved in foodborne illness investigations are considered proprietary.
The spike in gas prices comes as lower temperatures bring stronger demand for heating, while fears grow that there could be further supply disruptions in the Middle East.
The agreement focuses on port operations and a possible transportation corridor to link Churchill with DP World’s global logistics network and inland port facilities.