AMES, Iowa – Feb. 4, 2026 – Tell us what you think about the proposed bridge replacement on Iowa 141/Iowa 175 in Mapleton in Monona County.
Improvements include replacing the existing bridge with a new longer and wider bridge.
Construction will take place starting in the spring of 2028 and be completed by the end of 2028.
Iowa 141/Iowa 175 will be closed during construction and an offsite detour will be utilized. The detour will likely use the following routes:
- Iowa 175 north at the junction with Iowa 141 to Danbury
- South on County Road D54/L37 to County Road L37
- Continue south on County Road L37 to County Road E16
- West on County Road E16 to the junction of Sioux Street in Mapleton
- West on Sioux Street to N 4th Street
- South on N 4th Street back onto Iowa 175 southwest
Share Your Feedback by Feb. 16
Learn about the project and share your feedback You will need to provide your name and email before commenting.
For questions about the project or for free translation services, contact:
Sarah Tracy, P.E. Transportation Planner
Iowa DOT District 3 Office, 6409 Gordon Drive, Sioux City, Iowa 51106,
Phone: 855-925-2801, use the extension 3806
Email: n16865@publicinput.com
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Iowa DOT ensures nondiscrimination and equal employment in all programs and activities in accordance with Title VI and Title VII of the Civil Rights Act of 1964 and other nondiscrimination statutes. If you need more information or special assistance for persons with disabilities or limited English proficiency, contact Iowa DOT Civil Rights at 515-239-1111 or by email at civil.rights@iowadot.us.