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 |
|---|---|---|---|---|---|
| N FORK MAQUOKETA RIVER | Iowa | Good | 2002 | 237.4 m | 4,550 |
| LOST CREEK | Iowa | Fair | 1966 | 61.9 m | 4,550 |
| LOST CREEK | Iowa | Good | 1992 | 62.2 m | 4,550 |
| N FORK MAQUOKETA RIVER | Iowa | Good | 2002 | 237.4 m | 4,550 |
| SOUTH BEAVER CREEK | Iowa | Good | 2003 | 84.4 m | 4,550 |
| CEDAR RIVER | Iowa | Fair | 1970 | 218.8 m | 4,550 |
| I&M RR | Iowa | Good | 1998 | 66.8 m | 4,550 |
| AITCHISON ROAD | Iowa | Good | 2002 | 46.9 m | 4,550 |
| SOUTH BEAVER CREEK | Iowa | Good | 2003 | 84.4 m | 4,550 |
| IA 14 & SHERMAN CREEK | Iowa | Good | 1999 | 169.8 m | 4,550 |
| T 19 | Iowa | Fair | 2003 | 53.0 m | 4,550 |
| SR T19 | Iowa | Good | 2003 | 53.0 m | 4,550 |
| WEST BR SUGAR CREEK | Iowa | Good | 2003 | 69.5 m | 4,550 |
| VIRDEN CREEK | Iowa | Fair | 1962 | 17.1 m | 4,546 |
| DRAINAGE DITCH | Iowa | Fair | 1958 | 7.9 m | 4,530 |
| BRANCH BEAR CREEK | Iowa | Fair | 1983 | 10.1 m | 4,530 |
| BRANCH BEAR CREEK | Iowa | Fair | 1976 | 10.1 m | 4,530 |
| BRANCH LITTLE FLOYD RVR | Iowa | Fair | 1958 | 6.7 m | 4,530 |
| I-74 | Iowa | Fair | 2010 | 82.3 m | 4,523 |
| STREAM | Iowa | Fair | 1940 | 8.8 m | 4,520 |
| BLOODRUN CREEK | Iowa | Fair | 1977 | 34.4 m | 4,520 |
| SALT CREEK | Iowa | Good | 1989 | 124.7 m | 4,510 |
| WESTCOTT PK LOOP | Iowa | Fair | 1972 | 23.8 m | 4,510 |
| LITTLE SIOUX RIVER | Iowa | Fair | 1973 | 120.7 m | 4,510 |
| CEDAR CREEK | Iowa | Good | 2018 | 65.5 m | 4,510 |
| I-80 | Iowa | Fair | 1959 | 64.0 m | 4,502 |
| IA 2 | Iowa | Fair | 1972 | 66.4 m | 4,500 |
| IA 2 | Iowa | Fair | 1972 | 66.4 m | 4,500 |
| TRIB. BURNETT CREEK | Iowa | Good | 1987 | 8.8 m | 4,500 |
| MT PLEASANT AVE | Iowa | Good | 2001 | 68.6 m | 4,500 |
| NB I-35 & EB I-80 | Iowa | Good | 2009 | 98.2 m | 4,500 |
| NORTH TIMBER CREEK | Iowa | Good | 2002 | 40.2 m | 4,500 |
| OVER UP RR | Iowa | Fair | 1962 | 65.5 m | 4,500 |
| EAST BOYER RIVER | Iowa | Fair | 1962 | 65.5 m | 4,500 |
| MAQUOKETA RIVER | Iowa | Good | 2003 | 327.1 m | 4,500 |
| IOWA RIVER RR | Iowa | Good | 2003 | 66.4 m | 4,500 |
| IOWA RIVER RR | Iowa | Good | 2003 | 66.4 m | 4,500 |
| UP RR | Iowa | Fair | 1974 | 117.7 m | 4,500 |
| PONY CREEK | Iowa | Fair | 1991 | 55.2 m | 4,492 |
| SIX MILE CREEK | Iowa | Fair | 1988 | 50.9 m | 4,490 |
| STREAM | Iowa | Fair | 1919 | 12.5 m | 4,490 |
| OLD CHANNEL BOYER RIVER | Iowa | Good | 1983 | 22.3 m | 4,490 |
| BLAIR CREEK | Iowa | Fair | 1975 | 23.8 m | 4,480 |
| MIDDLE CREEK | Iowa | Good | 2023 | 36.9 m | 4,465 |
| EAST NISHNABOTNA RIVER | Iowa | Fair | 1964 | 107.9 m | 4,460 |
| RED OAK CREEK | Iowa | Fair | 1918 | 12.8 m | 4,460 |
| UPRR | Iowa | Good | 1997 | 66.4 m | 4,450 |
| CO RD S-27 | Iowa | Good | 1990 | 53.6 m | 4,450 |
| 2ND AVE | Iowa | Good | 2023 | 60.1 m | 4,450 |
| AVE G | Iowa | Good | 2023 | 74.0 m | 4,450 |
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.