An 18-wheeler traveling on northbound I-55 near downtown flipped while exiting the on-ramp to the Crump overpass toward Arkansas, spilling Cobalt nitrate police said.The traffic accident happened at around 7 p.m. just south of Riverside Drive.Hazmat crews said the big rig was transporting 14 500-gallon containers of Cobalt nitrate when it flipped. Nine of the containers ruptured.Police said that it took an hour to stop the leak.There was no need to evacuate the neighborhood because of the wind and low 70s temperatures at the time of the traffic accident, police said.Cobalt nitrate is used for industrial cleaning. If inhaled it could cause respiratory issues and is a skin irritant.There were no reported injuries.
Police were told nitric acid had leaked from the big rig.
None of the spilled Cobalt nitrate got into the sewer system, police said.
Northbound traffic on I-55 was diverted while hazmat crews tended to the felled big rig.
TDOT expects the clean up to be completed by 4:30 a.m. Thursday.
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