In order to have an accurate 2023 inventory for the NBI submittal replaced or removed structures are not archived from now until the submittal is complete. These structures will be removed from the SIIMS inventory shortly after a valid tape is submitted. Although notifications regarding the replaced or removed structures cannot be eliminated, these are not a concern during this time frame and will be properly handled by Iowa DOT personnel.

If you are having issues with your LOGIN TO SIIMS, there was a recent change to new usernames and a different authentication process.  
Please send an e-mail to for assistance.

Please see the Resources and Information page for recent additions.

The recent training for SIIMS is available.   SIIMS Training     Recording

Documentation for the updates to SIIMS coming next month is available.   SIIMS June Updates

The Iowa Department of Transportation's (DOT) Structure Inventory and Inspection Management System (SIIMS) system is the single source location for entering and reviewing condition information on all Iowa bridges, both local and state owned. The system offers a variety of features and capabilities. 

Current users

Already have a SIIMS account? Access SIIMS or update your account information.

To manage the number of active SIIMS users, user access will be audited. Users who have not logged into SIIMS for five years or more will be deleted.

New users

Are you a new SIIMS user? Get set up with a new account.

Contact Us

Bridges and Structures Bureau
Iowa Department of Transportation
Phone: 515-239-1648
More contacts


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