Iowa 14 Improvements between Monroe and Knoxville

Lake Red Rock Brige

Iowa 14 between Monroe and Knoxville will be improved beginning spring 2025 through 2028.  Starting in 2025, the Brush Creek bridge will be reconstructed and Lake Red Rock bridge will be overlayed.

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Location

Iowa 14 between Monroe and Knoxville in Marion County.  

Map showing location where construction will be - Iowa 14 between Monroe and Knoxville in Marion County.
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Current Traffic Impacts

Beginning April 7, 2025

Iowa 14 between Monroe and Knoxville will be closed to through traffic.

Detour: A detour will follow IA 163, County Road T17 and IA 92 in both directions.  Access to properties will be maintained. 

Watercraft Impacts

Watercraft should remain clear of the Brush Creek bridge and exercise caution when passing under the Lake Red Rock bridge.

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Project Schedule

Phase 1: April 7-October 23, 2025

Includes the demolition and replacement of the bridge over Brush Creek and a deck overlay on the bridge over Lake Red Rock. Through traffic will be detoured.

Phase 2: 2026

Includes a deck overlay of the bridge over White Breast Creek and the bridge over Teter Creek. Iowa 14 will remain open to through traffic. The bridges will be reduced to one lane controlled by a traffic signal.

Phase 3: 2027

Includes reconstructing Iowa 14 starting north of Kermit Drive in Knoxville to Hayes Drive. Traffic will be detoured.

Phase 4: 2028

Consists of reconstructing Iowa 14 from Hayes Drive to north of County Road G28. Traffic will be detoured.

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Project Overview

Brush Creek Bridge

The existing Brush Creek bridge, built in 1965, is a steel two-girder bridge. The deck was overlaid in 1987 and epoxy-injected in 2014, but it is nearing the end of its useful life. The bridge also has deficiencies in both the superstructure and substructure.

To address this we will make the following improvements:

  • Demolish existing bridge and construct a new 454’ x 44’ pretensioned prestressed concrete beam bridge.
  • Install revetments.
  • Construct paved shoulders and install guardrail at all four corners of bridge.
  • Construct rock flumes at all four corners of bridge.

Bridge Over Lake Red Rock

The current bridge over Lake Red Rock was constructed in 1965, the structure is a two-girder 42-span continuous steel welded plate girder bridge.  The deck was overlaid in 1988 and some cracks were epoxy sealed in 2012.  Currently there is some deterioration of the bridge deck.

To address this we will make the following improvements:

  • Bridge deck overlay.
  • Repair west curb, reconstruct east curb.
  • Concrete repair at seven bridge joints.
  • Clean and paint girder ends and bearings.
  • Replace existing drainage systems.

 

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Project Documents

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Contacts

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