The truck tipped over around 7:35 a.m. and caused morning rush hour traffic to back up for more than a mile, Minnesota Department of Transportation cameras showed.
The truck driver was not hurt, according to Lt. Gordon Shank with the Minnesota State Patrol. Ten pigs died in the crash.
Authorities rounded up the pigs, some of which were injured.
Investigators are looking into what caused the semi to tip on its side as it navigated the curve on I-694 where it joins with northbound Interstate 35E.
Nearly five years ago,
more than 20 pigs spilled onto the roads in a more rural part of the state after a semitruck overturned at a highway interchange near Mankato. About 90 pigs had been in the livestock trailer, and some of them died. The driver suffered minor injuries.