Bridge information and resources

On an annual basis, the Iowa DOT extends federal-aid, federal-aid swap, and state funding for replacement or rehabilitation of city-owned bridges that have been classified by an engineering inspection as poor. Bridges are assigned priority points based on criteria shown on the Priority Point Worksheet. Once a city requests that an eligible bridge be considered for funding, it is ranked annually until an offer of funding is made and accepted by the city or the city requests that the bridge no longer be considered for funding. The majority of funds for this program are federal-aid swap, and vary according to the current federal funding methodology and availability of funds. For more information, refer to I.M. 1.100, Highway Bridge Programs for Cities and Counties.

County bridge priority point rating spreadsheet

This report shows each county's bridges, and the corresponding priority points according to the rating system in I.M. 1.100. Counties with questions concerning these figures should contact Niki Stinn in the Office of Local Systems at 515-239-1064 or via email at

Qualifying Bridge List (QBL) – Counties Only

This spreadsheet shows the structures that qualify for Highway Bridge Program funding as detailed in I.M. 1.100.  To assemble this listing, the DOT extracts information from SIIMS at the end of each calendar year.  The data is then passed to FHWA.  FHWA reviews the data and returns a finalized list to the DOT in approximately June of each year.  Local Systems then uses the approved list in October of each year to calculate the new HBP funding allocation factors.  Therefore, counties can expect that the data contained in this sheet may be a year old or more depending on when the last inspection was done on a structure and entered into SIIMS.  Counties with questions concerning this listing should contact Niki Stinn in the Local Systems Bureau via phone at 515-239-1064 or via email at

County Bridge Standards

Standard bridge plans designed for use by local agencies.

Culvert Standards

Standard culvert designs for use by the Iowa DOT and local agencies.

Annual Bridge Reports

The Iowa DOT Bridges and Structures Bureau compiles an Annual Bridge Report that can be found here.


SIIMS is used by the Iowa DOT, local agencies, and their consultants to enter and review bridge inspection information in order to comply with the National Bridge Inspection Standards (NBIS).

  • Report - Prioritizing Preservation for Locally Owned Bridges

    While State Departments of Transportation (DOTs) own and maintain a larger deck area of bridges, local and Federal agencies have almost an equal number of bridges for which they are responsible for maintenance and preservation.

    This report analyzes how local agency bridge owners prioritize preservation actions for their bridge inventories. The study draws upon the results of a survey of over 500 local agency bridge owners and follow-up interviews with select respondents. The report highlights the project selection processes for bridge preservation activities including funding sources, and documents typical bridge preservation actions, bridge management practices, successes and challenges to funding preservation, and the status of the agencies’ bridge preservation programs.

    For questions on the report or the FHWA Bridge Preservation Program, please contact Raj Ailaney at (202)366-6749 or


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