Iowa DOT News Release

Iowa 3 bridge over the Cedar River in Butler County expected to open September 15

Posted on: September 13, 2021

MASON CITY, Iowa – Sept. 13, 2021 – The bridge replacement project on Iowa 3 over the Cedar River in Butler County is nearing completion and is expected to reopen to traffic on Wednesday, Sept. 15, 2021,  weather permitting, according to the Iowa Department of Transportation’s Mason City construction office.

Although the bridge will be open, there are a few items yet to be completed, including guardrail at the east end of the bridge, seeding, and erosion control. These activities may cause intermittent lane closures. The remainder of the work should be completed by mid-November, weather permitting.

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: Ken Howe, 641-422-1684 or

Iowa highway in the evening