Authorities investigating tanker crash south of Basin Photo Courtesy: Boulder-Bull Mountain Assistant Fire Chief Steven Carey By: MTN News and last updated 2021-01-13 22:05:52-05 HELENA â UPDATE 5:45 p.m. 1/13/21 : Law enforcement have released more information regarding the fatal tanker explosion on I-15 near Basin. The driver of the tanker was a 34-year-old man from Rexburg, Idaho.The name has not been released while the family is being notified. Investigators say the road was slick and the vehicle overturned when taking a corner. Once overturned the tanker began to leak and then caught fire. ORIGINAL STORY: Part of Interstate 15 has been closed Tuesday night after tanker crash and fire south of Basin.