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 |
|---|---|---|---|---|---|
| US 20 | Iowa | Good | 1990 | 107.6 m | 5,485 |
| SUGAR CREEK | Iowa | Good | 2016 | 42.7 m | 5,474 |
| BNSF RR CITY STS | Iowa | Fair | 1972 | 206.0 m | 5,450 |
| BNSF RR | Iowa | Good | 1976 | 61.3 m | 5,450 |
| IOWA #146 | Iowa | Good | 2002 | 61.9 m | 5,450 |
| BNSF RR CITY STS | Iowa | Fair | 1972 | 197.6 m | 5,450 |
| N FORK MAQUOKETA RIVER | Iowa | Fair | 1958 | 153.0 m | 5,450 |
| US 218 | Iowa | Good | 1991 | 59.1 m | 5,414 |
| CEDAR RIVER | Iowa | Fair | 1988 | 188.7 m | 5,414 |
| CEDAR RIVER OVERFLOW | Iowa | Fair | 1969 | 138.1 m | 5,414 |
| OTTER CREEK | Iowa | Good | 1971 | 57.6 m | 5,401 |
| EAST OTTER CREEK | Iowa | Good | 2023 | 44.0 m | 5,401 |
| SOUTH RIVER | Iowa | Good | 2016 | 75.3 m | 5,400 |
| SPRING CREEK | Iowa | Good | 2019 | 203.9 m | 5,400 |
| SNYDER CREEK | Iowa | Fair | 1957 | 8.8 m | 5,400 |
| IOWA RIVER | Iowa | Poor | 1916 | 96.0 m | 5,400 |
| TROUT CREEK | Iowa | Fair | 1969 | 39.0 m | 5,400 |
| OTTER CREEK | Iowa | Fair | 1979 | 37.5 m | 5,400 |
| WAGNER CREEK | Iowa | Good | 2003 | 11.6 m | 5,400 |
| CC&P RR | Iowa | Fair | 1968 | 115.2 m | 5,400 |
| INDIAN CREEK | Iowa | Good | 2011 | 8.2 m | 5,400 |
| SPRING CREEK | Iowa | Good | 2019 | 203.9 m | 5,400 |
| SOUTH RIVER OVERFLOW | Iowa | Good | 2011 | 8.1 m | 5,400 |
| DRAINAGE DITCH | Iowa | Good | 1967 | 6.4 m | 5,400 |
| N FK LONG CREEK | Iowa | Good | 1997 | 63.6 m | 5,400 |
| DRAINAGE | Iowa | Good | 2004 | 6.4 m | 5,400 |
| 25TH ST | Iowa | Good | 1967 | 48.2 m | 5,400 |
| 25TH ST | Iowa | Fair | 1967 | 48.2 m | 5,400 |
| WINNEBAGO RIVER | Iowa | Fair | 1988 | 66.1 m | 5,400 |
| DRAINAGE | Iowa | Good | 2018 | 8.0 m | 5,400 |
| N FORK MAQUOKETA RIVER | Iowa | Fair | 1986 | 153.3 m | 5,400 |
| DRY RUN CREEK | Iowa | Good | 1978 | 8.8 m | 5,400 |
| VILLAGE CREEK | Iowa | Fair | 1965 | 48.2 m | 5,400 |
| BORDEAUX RUN | Iowa | Good | 1993 | 10.1 m | 5,395 |
| CATFISH CREEK | Iowa | Fair | 1978 | 47.2 m | 5,395 |
| OVER UP RR | Iowa | Fair | 1984 | 52.1 m | 5,377 |
| DRY CREEK | Iowa | Good | 2010 | 39.6 m | 5,369 |
| OVER UP RR | Iowa | Fair | 1978 | 219.8 m | 5,368 |
| DRAINAGE DITCH | Iowa | Good | 1994 | 7.6 m | 5,358 |
| 1ST ST S | Iowa | Good | 1988 | 47.5 m | 5,350 |
| BNSF RR | Iowa | Fair | 2006 | 122.5 m | 5,350 |
| IA NORTHERN RR & STREAM | Iowa | Good | 1998 | 184.1 m | 5,350 |
| FLOOD CREEK | Iowa | Good | 1998 | 54.6 m | 5,350 |
| SHELLROCK RVR REDBALL RD | Iowa | Good | 1999 | 147.8 m | 5,350 |
| IA NORTHERN RR & STREAM | Iowa | Good | 1998 | 184.1 m | 5,350 |
| FLOOD CREEK | Iowa | Good | 1998 | 54.6 m | 5,350 |
| SHELLROCK RVR REDBALL RD | Iowa | Good | 1999 | 147.8 m | 5,350 |
| 1ST ST S | Iowa | Good | 1988 | 48.5 m | 5,350 |
| DRAINAGE | Iowa | Fair | 1986 | 7.0 m | 5,322 |
| IA 163 | Iowa | Good | 1994 | 73.2 m | 5,322 |
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.