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.

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BridgeLocationConditionYear BuiltLengthADT
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.