Iowa DOT News Release



Public input requested for proposed interchange reconstruction at Interstate 29 and Iowa 141 in Woodbury County

Posted on: April 19, 2021

AMES, Iowa – April 19, 2021 – The Iowa Department of Transportation is requesting public input for a proposed reconstruction of the Interstate 29 and Iowa 141 interchange near the city of Sloan in Woodbury County.

The proposed project will include reconstruction of the existing bridge with a 222’ x 40’ pretensioned prestressed concrete beam bridge, immediately north of the existing bridge. The bridge and Iowa 141 will be raised approximately 2 feet to provide for desirable clearance for interstate traffic. New bridge approaches will be constructed, and the existing guardrail will be replaced. The shoulders will be paved twenty feet beyond the guardrails.

Construction of the project is expected to begin in 2023.

Through traffic on Interstate 29 will be maintained during construction, except for short durations to accommodate bridge demolition and setting of new beams. It is anticipated these short duration closures of Interstate 29 will occur at night and use the ramps as detours. Through traffic of Iowa 141 will be maintained during construction except for short time periods. Traffic will be detoured using Interstate 29 interchange at Salix and Woodbury/Monona County Road K-45 (Old Hwy 75). The ramps south of Iowa 141 (northbound exit / southbound entrance) will be closed during construction. During that closure, traffic will be detoured using Interstate 29 and Monona County Road E-24 / Woodbury / Monona County Road K-42 interchange west of Whiting. Through traffic on Iowa 141 will be maintained via staged construction. For more information, see the website listed below.  

For general information regarding the proposed project, contact Shane Tymkowicz, P.E., assistant district engineer, Iowa DOT District 3 Office, 2800 Gordon Drive, Sioux City, Iowa 51102, phone 712-274-5834 or 712-261-0405, email shane.tymkowicz@iowadot.us.

Visit the Iowa DOT’s project-related public involvement event website at www.iowadot.gov/pim for information about scheduled public meetings and hearings, or view and offer input on any DOT project using the new “Map Search” feature. Comments and questions regarding the online meeting should be received by April 29, 2021.  If you would like to receive future email notifications, or submit a comment or question regarding this project, go to:  http://bit.ly/iowadot4026.


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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. If you need more information or special assistance for persons with disabilities or limited English proficiency, contact Tonnette R. Harris, J.D., Civil Rights Bureau Director at 515-509-8814.


Iowa highway in the evening