Browse Bridge Database
23,716 bridges in the FHWA National Bridge Inventory in Iowa.
National Bridge Inventory Database
Browse 23,716 bridges from the Federal Highway Administration National Bridge Inventory. Filter by state, condition rating, or search by name and location.
| Bridge | Location | Condition | Year Built | Length | ADT |
|---|---|---|---|---|---|
| 150TH ST | Iowa | Good | 2001 | 35.9 m | 4,450 |
| LITTLE SILVER CREEK | Iowa | Good | 2015 | 72.0 m | 4,450 |
| AVE G | Iowa | Good | 2023 | 74.0 m | 4,450 |
| CO RD B35 | Iowa | Good | 1998 | 57.3 m | 4,450 |
| CC RR | Iowa | Good | 2011 | 66.1 m | 4,450 |
| CERRO GORDO COUNTY TRAIL | Iowa | Good | 1997 | 53.0 m | 4,450 |
| KEG CREEK | Iowa | Good | 2008 | 60.0 m | 4,450 |
| UPRR | Iowa | Good | 1997 | 66.4 m | 4,450 |
| I&M RR | Iowa | Good | 1999 | 66.8 m | 4,450 |
| 2ND AVE | Iowa | Good | 2023 | 60.1 m | 4,450 |
| CO RD S-27 | Iowa | Good | 1990 | 53.6 m | 4,450 |
| CERRO GORDO COUNTY TRAIL | Iowa | Fair | 1997 | 53.0 m | 4,450 |
| WEST BROADWAY | Iowa | Good | 2023 | 72.3 m | 4,450 |
| WEST BROADWAY | Iowa | Good | 2023 | 72.3 m | 4,450 |
| LIZARD CREEK | Iowa | Good | 2011 | 139.9 m | 4,450 |
| FRENCH CREEK | Iowa | Fair | 1982 | 22.3 m | 4,439 |
| FLOYD RIVER | Iowa | Poor | 1962 | 106.4 m | 4,432 |
| BRANCH SMITH CREEK | Iowa | Fair | 1927 | 11.0 m | 4,430 |
| SMITH CREEK | Iowa | Fair | 1976 | 10.1 m | 4,430 |
| BOYER RIVER | Iowa | Good | 2016 | 86.2 m | 4,430 |
| DRAINAGE DITCH | Iowa | Fair | 1985 | 37.5 m | 4,420 |
| HONEY CREEK | Iowa | Good | 1997 | 54.6 m | 4,420 |
| RED CEDAR RIVER | Iowa | Fair | 1984 | 168.9 m | 4,419 |
| I-35 | Iowa | Fair | 1972 | 89.0 m | 4,419 |
| MUD LAKE | Iowa | Fair | 1984 | 110.9 m | 4,419 |
| ROCK CREEK | Iowa | Fair | 1973 | 31.4 m | 4,410 |
| WEST WAPSINONOC CREEK | Iowa | Good | 2013 | 54.7 m | 4,410 |
| MISSOURI RIVER | Iowa | Fair | 1991 | 604.4 m | 4,410 |
| YOUNGS DITCH | Iowa | Fair | 1953 | 59.7 m | 4,410 |
| WILSON DITCH | Iowa | Good | 2023 | 6.9 m | 4,410 |
| I-380 | Iowa | Fair | 1972 | 81.7 m | 4,410 |
| IA 14 | Iowa | Fair | 2000 | 63.4 m | 4,400 |
| IA 14 | Iowa | Good | 2000 | 63.4 m | 4,400 |
| MOON CREEK | Iowa | Fair | 1972 | 40.8 m | 4,400 |
| CC RR | Iowa | Good | 2010 | 66.1 m | 4,400 |
| W BRANCH OF KITTY CREEK | Iowa | Good | 2003 | 75.6 m | 4,400 |
| DEEP CREEK | Iowa | Good | 1996 | 31.4 m | 4,400 |
| DES MOINES RIVER | Iowa | Fair | 1963 | 200.9 m | 4,400 |
| BNSF RR | Iowa | Good | 2001 | 63.1 m | 4,400 |
| DEEP CREEK | Iowa | Good | 1996 | 31.4 m | 4,400 |
| OVER UP RR | Iowa | Fair | 1962 | 65.5 m | 4,400 |
| EAST BOYER RIVER | Iowa | Fair | 1962 | 65.5 m | 4,400 |
| OVER CC RR | Iowa | Fair | 1967 | 114.3 m | 4,400 |
| BOYER RIVER | Iowa | Fair | 1967 | 88.7 m | 4,400 |
| MAQUOKETA RIVER | Iowa | Good | 2003 | 327.1 m | 4,400 |
| LIZARD CREEK | Iowa | Good | 2010 | 139.9 m | 4,400 |
| W BRANCH OF KITTY CREEK | Iowa | Good | 2003 | 75.6 m | 4,400 |
| BNSF RR | Iowa | Good | 2001 | 63.4 m | 4,400 |
| LITTLE BEAVER CREEK | Iowa | Good | 1997 | 40.5 m | 4,400 |
| I-80 | Iowa | Fair | 1963 | 68.6 m | 4,390 |
Frequently Asked Questions
The National Bridge Inventory (NBI) is a federal database maintained by the Federal Highway Administration containing inspection data for all bridges on public roads in the U.S. with a span of more than 20 feet. Bridge owners must inspect each structure at least every 24 months.
ADT stands for Average Daily Traffic, the average number of vehicles crossing the bridge per day. Bridges are sorted by ADT by default because high-traffic bridges in poor condition pose the greatest risk to the most people.
Yes. Use the search field above to find bridges by name, location, or features crossed. You can also combine the search with state and condition filters to narrow your results.