Iowa DOT News Release

Iowa 3 near Thor closed this Monday for culvert replacement #iatraffic

Posted on: August 18, 2017

MASON CITY, Iowa – Aug. 18, 2017 – A culvert replacement project on Iowa 3 between Humboldt County Road P-66 and Iowa 17, near Thor, will require closing the roadway to traffic beginning Monday, Aug. 21, until late September 2017, weather permitting, according to the Iowa Department of Transportation’s Mason City construction office

During this closure, motorists will be detoured around the construction zone by traveling on Humboldt County Road P-66, Humboldt County Road C-30, and Iowa 17. Permitted oversize loads are prohibited.

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; call 511 (within Iowa) or 800-288-1047 (nationwide); stay connected with 511 on Facebook or Twitter (find links at; or download the free app to your mobile device.

To receive email or text alerts about traffic incidents, road closures, traffic delays, and other restrictions that affect this highway route or other routes you travel, the Iowa DOT offers the “Your 511” option on It’s easy to subscribe to Your 511 and sign up to receive the email/text alerts. Visit for simple, step-by-step instructions.


Contact: Roy Gelhaus at 641-422-1684 or

Iowa highway in the evening