Interstate 29 is closed between Vermillion and North Sioux City as crews work to construct a temporary levee. More than a hundred National Guard members are working alongside residents to create sandbags.
The Big Sioux River is expected to crest sometime in the next 24 hours, but a levee aims to divert water from the river into nearby McCook Lake. Residents met last night with local government to address concerns with possible flooding around the lake. Sandbags will be used to help protect homes from cresting waters.
Officials say that the exit 4 overpass was designed to handle diverted water in case of emergency flooding. The temporary levee will attact to existing infrastructure and send water across Interstate 29.
In a press release, state officials named several possible detours:
Through traffic on Interstate 29 will be detoured as follows:
• Southbound I-29 Interstate traffic will be detoured onto I-90 east at Exit 84A at Sioux Falls, SD, then south on I-35 Exit 159A at Des Moines, IA, then west on I-80 at Exit 137A to Council Bluffs, IA, then to I-29 south.
• Northbound I-29 Interstate traffic will be detoured at Council Bluffs, IA onto I-80 eastbound, then north on I-35 in Iowa to Albert Lea, MN and west on I-90 to Sioux Falls.
Interstate through traffic detour on local roads:
• Southbound I-29 traffic in South Dakota will be detoured onto SD 50 West at Exit 26 to Vermillion, then south to SD 19 into Nebraska where it becomes Highway 15, then continue south to Highway 12 east in Nebraska to U.S 20 east in Nebraska, then to Exit 1A for I-29 south at South Sioux City, NE.
• Northbound I-29 traffic will exit onto Highway 20 west, then north on Highway 12 and Highway 15 in Nebraska, continuing onto Highway 19 in South Dakota to the Vermillion Exit to SD 50 eastbound to I-29.