TxDOT opened two northbound lanes and one southbound lane on Wednesday night.
Earlier on Wednesday, crews were still out on the road, pumping out extra water and checking the road.
The closures have caused traffic problems for people living and working nearby in Grapevine and Flower Mound.
Between the detours and the construction, people were certainly ready for the road to reopen.
Much of the water was receding naturally, but crews were using pumps to help speed the process up.
Parts of the road were also being re-striped.