The Minnesota River is expected to crest in Shakopee at moderate flood stage today and in Savage at major flood stage on Saturday. Also on Saturday, the Mississippi River is expected to crest in St Paul at 18 1/2 feet, which is 4 1/2 feet above flood stage. Crews have been sandbagging in various areas and a number of roads have been closed. The St. Paul Airport is expected to close today when a flood wall is erected across the runway. The airport is expected to reopen on Monday.