About 7:15 a.m., on February 23, 1985, Seaboard System Railroad (SBD) train No. F-690 derailed at Jackson, South Carolina, while traveling about 53 mph. The train struck a cushion unit that had dropped from a cushion-underframe boxcar in a train which had passed through Jackson about 5 hours earlier. Eight of the 27 derailed cars were tank cars laden with cyclohexane. The tank cars did not have head shield protection. Cyclohexane was released through tank head penetrations and was ignited immediately. Although no fatalities or injuries resulted from the accident, damage was estimated at $1,293,133, and residences within a 1-mile radius of the accident site were evacuated.
About 7:50 a.m., on February 25, 1985, SBD train No. F-481 struck the rear of standing cars at Robbins, South Carolina. The train was being operated on an absolute block in manual block territory on a nonsignalized, single main track. The standing cars were from a train left at Robbins 2 days before because of the main track blockage at Jackson from the earlier derailment. The accident resulted in three serious injuries, and damage was estimated at $66,455.