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. 

If you are having issues with your LOGIN TO SIIMS, please send an e-mail to

If you are having issues with SIIMS performing correctly, please fill in the Service Request form available below and send an e-mail with the completed form attached to

SIIMS Service Request Template

Please also see the Resources and Information page for the items listed below.

SIIMS SNBI Training   SNBI Implementation   SNBI Training Video

The training for SIIMS provided in 2023 is available.   SIIMS Training     Recording

Documentation for the updates to SIIMS from June 2023 is available.   SIIMS June Updates

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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