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 |
|---|---|---|---|---|---|
| DRAINAGE | Iowa | Good | 1999 | 57.3 m | 4,080 |
| DES MOINES RIVER | Iowa | Good | 2010 | 211.8 m | 4,079 |
| I-35 | Iowa | Fair | 1965 | 66.4 m | 4,079 |
| I-35 | Iowa | Fair | 1967 | 68.0 m | 4,079 |
| BNSF RR | Iowa | Fair | 1996 | 51.8 m | 4,062 |
| ORANGE CITY SLOUGH | Iowa | Fair | 1977 | 23.8 m | 4,060 |
| INDIAN CREEK | Iowa | Poor | 1930 | 13.7 m | 4,059 |
| FARMERS CREEK | Iowa | Good | 1996 | 48.2 m | 4,050 |
| N FORK MAQUOKETA RIVER | Iowa | Good | 1996 | 112.2 m | 4,050 |
| FARMERS CREEK | Iowa | Good | 1998 | 48.5 m | 4,050 |
| N FORK MAQUOKETA RIVER | Iowa | Fair | 1967 | 111.3 m | 4,050 |
| FARMERS CREEK | Iowa | Fair | 1966 | 48.2 m | 4,050 |
| FARMERS CREEK | Iowa | Good | 1966 | 48.2 m | 4,050 |
| TARECOD CREEK | Iowa | Fair | 1967 | 40.2 m | 4,050 |
| TARE COD CREEK | Iowa | Good | 1996 | 40.8 m | 4,050 |
| LAKE CHANNEL | Iowa | Good | 2006 | 46.6 m | 4,040 |
| SPRING CREEK | Iowa | Good | 2020 | 68.9 m | 4,040 |
| I-235 | Iowa | Good | 2003 | 62.5 m | 4,037 |
| I-235 | Iowa | Good | 2003 | 62.5 m | 4,037 |
| SHELL ROCK RIVER | Iowa | Fair | 2008 | 93.9 m | 4,036 |
| CRABAPPLE CREEK | Iowa | Fair | 1964 | 37.5 m | 4,030 |
| INDIAN CREEK | Iowa | Fair | 1964 | 38.7 m | 4,030 |
| I-80 | Iowa | Fair | 1959 | 67.1 m | 4,023 |
| MUDDY CREEK | Iowa | Good | 2009 | 14.6 m | 4,020 |
| MUDDY CREEK | Iowa | Good | 2012 | 14.6 m | 4,020 |
| WHITE FOX CREEK | Iowa | Good | 1986 | 25.3 m | 4,020 |
| SINK CREEK | Iowa | Good | 1997 | 11.9 m | 4,016 |
| INDIAN CREEK CONDUIT | Iowa | Good | 1981 | 9.1 m | 4,012 |
| BLACKHAWK CREEK | Iowa | Poor | 1950 | 14.3 m | 4,004 |
| BOUNDRY AVE | Iowa | Good | 2003 | 37.5 m | 4,000 |
| BOUNDRY AVE | Iowa | Good | 2003 | 37.5 m | 4,000 |
| DMC HWY 34 & BNSF RR | Iowa | Good | 2004 | 160.0 m | 4,000 |
| PRAIRIE GROVE RD | Iowa | Good | 2002 | 35.7 m | 4,000 |
| HORSE CREEK | Iowa | Fair | 1987 | 37.5 m | 4,000 |
| DRAINAGE DITCH | Iowa | Fair | 1965 | 27.7 m | 4,000 |
| HORSE CREEK | Iowa | Fair | 1969 | 37.5 m | 4,000 |
| PRARIE GROVE RD | Iowa | Good | 2002 | 35.7 m | 4,000 |
| IOWA 38 | Iowa | Good | 2002 | 71.0 m | 4,000 |
| DMC HWY 34 & BNSF RR | Iowa | Good | 2004 | 172.5 m | 4,000 |
| SPRING CREEK | Iowa | Fair | 1990 | 14.0 m | 3,999 |
| DODGE CREEK | Iowa | Fair | 1974 | 34.4 m | 3,990 |
| WEST TARKIO CREEK | Iowa | Fair | 1964 | 6.4 m | 3,990 |
| BEAVER CREEK | Iowa | Fair | 1988 | 82.6 m | 3,990 |
| N FORK MAQUOKETA RIVER | Iowa | Fair | 1985 | 54.9 m | 3,990 |
| TARKIO RIVER | Iowa | Fair | 1964 | 38.7 m | 3,990 |
| INDIAN CREEK | Iowa | Fair | 1948 | 45.7 m | 3,980 |
| 2ND ST NE | Iowa | Fair | 1979 | 150.3 m | 3,980 |
| KEG CREEK | Iowa | Fair | 1960 | 126.8 m | 3,979 |
| SMALL STREAM | Iowa | Fair | 1960 | 9.1 m | 3,979 |
| SMALL NATURAL STREAM | Iowa | Good | 2021 | 7.6 m | 3,970 |
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.