The Army Corp of Engineers said it could become a record flood event.
But Friday, water levels on the Big Sioux River came up a bit short.
The river crested earlier than expected Friday, meaning flooding in Union County wasn't nearly as bad as expected.
A levee had been built across I-29 to divert floodwaters into McCook Lake. That levee has already been dismantled, but not before causing a headache for many travelers.
It was just after 2 o'clock Friday afternoon when South Dakota Highway Patrol reopened the interstate to traffic. The closure had some truckers counting the hours for it to reopen and businesses counting sales.
Goode-to-Go manager Misty Jungemann said "very busy, just we didn't have enough help to keep everybody satisfied. A lot of unhappy travelers, but we did the best we could and everybody walked out with a smile."
"We'll miss the business, but it'll be back to normal. We do get a lot of traffic in and out of here since it's summertime and everyone going on vacation. It was just a little overwhelming yesterday but we did really well," Jungemann said.
Business was booming but since I-29 is back open, now its business as usual.