CRESTON, Iowa – Aug. 5, 2025 – If you travel on eastbound Interstate 80 to reach I-35 and I-235 at the Southwest Mixmaster in West Des Moines you need to be aware of an upcoming nighttime road closure that may slow down your trip, according to the Iowa Department of Transportation’s Creston construction office.

Crews will close eastbound I-80 from Grand Prairie Parkway (exit 118) to the Southwest Mixmaster from 9 p.m. Sunday, Aug. 10, to 5 a.m. on Monday, Aug. 11, weather permitting, so a reconfiguration change can be made to the roadway because of a closure to the eastbound I-80 loop at Jordan Creek Parkway (exit 121).

During this closure you will follow a marked detour route using Grand Prairie Parkway (exit 118), and University Avenue, to reach I-35/I-80 (exit 124).

Detour map for I80 Eastbound from Grand Prairie Parkway to the SW Mixmaster.

The Iowa DOT reminds motorists to drive with caution, obey the posted speed limit and other signs in the work area, and be aware that traffic fines for moving violations are at least double in work zones. As in all work zones, drivers should stay alert, allow ample space between vehicles, and wear seat belts.