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North 17th Street Bridge Replacement Project


Project Name:
           North 17th Street Bridge Replacement Project

Project Location:
North 17th Street from Carbonado Road to the Northeast Wastewater Treatment Plant

Project Description:
  • The scope of this project includes the construction of a new bridge over a branch of Spring Creek and the re-alignment and replacement of the roadway approaches to that bridge.  
  • The Mahaska Community Recreation Trail may be incorporated into the new bridge as a shared use path.

Project Benefits:
The existing bridge on North 17th Street was built in 1930's and is in need of replacement.  When it was inspected in 2015, it was given an estimated remaining life of 2 years, which means that failure of the bridge is imminent.  In addition, the existing bridge height is not adequate for flood events and may not withstand significant rainfall events.  Currently, this bridge provides access to the Northeast Wastewater Treatment Plant, the Stephen Memorial Animal Shelter, and the multi-use recreational trail.  This project will allow for the construction of a new bridge meeting the current flood height requirements.  In addition, the Mahaska Community Recreation Trail will be incorporated into the new bridge as a shared use path.
Project Status
Project design ongoing. Calhoun-Burns & Associates was selected to conduct the preliminary design necessary to replace the existing bridge with a new bridge meeting current standards and Iowa Department of Natural Resources floodplain requirements. The existing bridge, with a stone gateway was constructed in the 1930’s, is eligible for National Register of Historic Places (National Register), which requires to preserve the existing bridge and to build the proposed bridge west of the existing structure. This project has been significantly delayed after finding out that the existing bridge is eligible for National Register and it is currently estimated the new bridge will be built in 2019. The preliminary design phase for this project has recently been approved by State Historic Preservation Officer (SHPO) and a flood plain development permit has been approved by Iowa DNR. The Iowa DOT is currently conducting an environmental review to issue National Environmental Policy Act (NEPA) clearance for this project. Once this project receives NEPA clearance, the City Council will then need to authorize another contract with an engineering consultant to conduct the final design of this bridge. The total project cost, including engineering and construction, is estimated at $1,160,000 with 80/20 funding participation from the Iowa DOT.

Estimated Project Cost:
City Portion (20%):                     $   232,000
Iowa DOT Grant Portion (80%): $   928,000
Total Cost:                                  $1,160,000

Design Phase Start Date
Design Phase End Date

Project Completion
It is anticipated that this project will be completed by the end of October 2019. 

If you have any questions about this project, please contact the Public Works Department at (641) 673-7472.

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