GRIMES, Iowa – Oct. 2, 2025 – If you use the Northeast Mixmaster to reach Interstate 235 you need to be aware of two upcoming ramp closures that may slow down your trip.
Crews from the Iowa Department of Transportation’s Grimes Construction office will be closing the ramp from westbound I-80 to westbound I-235 and the eastbound I-235 ramp to westbound I-80 on Monday, Oct. 6, weather permitting, so concrete can be poured for a new sign truss.
During these closures, westbound I-80 traffic wanting to reach westbound I-235 will exit at U.S. 69/Northeast 14th Street (exit 136) and then get back onto eastbound I-80/I-35 to reach westbound I-235.
Eastbound I-235 traffic wanting to reach westbound I-80/I-35 will travel north on I-35 and exit at Corporate Woods Drive (exit 89), turn south onto southbound I-35, then turn onto westbound I-80 (exit 137A) at the Northeast Mixmaster.
Visit the Iowa DOT website at https://iowadot.gov/modes-travel/roads-highways/major-construction-projects/des-moines-area-interstate-projects/northeast-mixmaster-construction for additional information about construction at the Northeast 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.
The latest traveler information is available anytime through our 511 system. Visit 511ia.org; call 511 (within Iowa) or 800-288-1047 (nationwide); stay connected with 511 on Facebook or X (find links at https://iowadot.gov/travel-tools/iowa-511/511-social-media-sites); or download the free app to your mobile device.
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For general questions about this project contact Frank Leong, Grimes construction office, at 515-986-2863 or frank.leong@iowadot.us.
2300 SE 17th St.
Grimes, IA 50111