64 Aluminum twin tub rotary dump coal gons, Mechanical Designation J311 with 263,000 gross rail loading built 1/1993 by Johnstown America. Cars are still in revenue service. Cars were used in eastern coal service. An additional 150 cars will be available March or April of 2020. AAR Car Code: J311,

• Inside length: 47' 08"
• Inside height: 10' 08"
• Inside width: 9' 2"
• Plate B
• Draft gear: 99
• Cubic Capacity: 4,000
• Outside length: 53' 1"
• Outside extreme Height: 12'
• Outside extreme width 10' 8"
• Max weight on rail: 26,3000 lbs
• Tare weight: 43,400 lbs
• Load Limit: 21,9300 lbs