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Browse Bridge Database

5,235 bridges in the FHWA National Bridge Inventory in Montana.

National Bridge Inventory Database

Browse 5,235 bridges from the Federal Highway Administration National Bridge Inventory. Filter by state, condition rating, or search by name and location.

Clear
BridgeLocationConditionYear BuiltLengthADT
INT ULM Montana Fair 1969 39.6 m 3,145
SEP COUNTY ROAD Montana Good 1969 24.1 m 3,145
INT ULM Montana Fair 1958 39.6 m 3,145
SHANE CREEK Montana Fair 2007 39.8 m 3,144
COUGAR CREEK Montana Fair 1964 11.4 m 3,139
GRAVE CREEK Montana Fair 1991 28.0 m 3,121
REPUBLICAN DITCH 063 Montana Fair 1941 8.2 m 3,100
LONE TREE CREEK Montana Fair 1973 27.4 m 3,099
PETTY CREEK Montana Good 2020 15.2 m 3,095
DEEP CREEK 098 Montana Good 1983 6.6 m 3,095
BBWA CANAL 032 Montana Good 1965 12.5 m 3,078
SEP I 90 011 Montana Good 1966 93.2 m 3,071
TEN MILE CREEK 003 Montana Good 2010 22.9 m 3,068
BIG DITCH Montana Good 1968 11.3 m 3,046
INT POWDER RIVER Montana Fair 1971 23.8 m 3,045
INT HUNTLEY-S 522 Montana Fair 1967 42.7 m 3,045
PRYOR CREEK Montana Fair 1967 95.2 m 3,045
INT HUNTLEY-S 522 Montana Fair 1967 42.7 m 3,045
S 8TH RD Montana Fair 1967 24.1 m 3,045
S 8TH RD Montana Fair 1967 24.1 m 3,045
PRYOR CREEK Montana Fair 1967 95.2 m 3,045
CLEARWATER RIVER Montana Fair 1949 35.8 m 3,044
GALLATIN RIVER Montana Fair 1949 76.8 m 3,038
BELT CREEK Montana Good 2022 73.8 m 3,037
BOULDER RIVER Montana Fair 2003 54.0 m 3,016
BBWA CANAL 115 Montana Good 2004 15.1 m 3,011
CLARK FORK RIVER Montana Fair 1996 143.2 m 3,009
CLARK FORK RIVER Montana Fair 1997 338.2 m 3,009
LAME DEER CREEK Montana Good 1976 20.7 m 3,000
BEAVER CREEK Montana Good 1966 37.2 m 2,982
INT P 20-SIDNEY Montana Fair 1969 66.7 m 2,981
YELLOWSTONE RIVER Montana Fair 1968 601.6 m 2,981
RR Montana Fair 1969 77.7 m 2,981
INT P 20-SIDNEY Montana Fair 1969 66.7 m 2,981
RR Montana Fair 1969 78.3 m 2,981
NORTH FORK ALKALI CREEK Montana Good 1992 7.3 m 2,972
PIPESTONE CREEK Montana Good 2018 42.7 m 2,969
N FORK BLACKFOOT RIVER Montana Fair 1956 55.5 m 2,959
MILK RIVER Montana Good 1973 93.0 m 2,952
YELLOWSTONE RIVER Montana Fair 1957 297.5 m 2,949
RED ROCK CREEK OVERFLOW Montana Fair 1942 18.3 m 2,919
DRAINAGE Montana Fair 1942 11.9 m 2,919
HELENA VALLEY CANAL 074 Montana Good 2000 13.1 m 2,914
INT EAST LIVINGSTON I 90 Montana Poor 1962 85.0 m 2,910
OTTER CREEK Montana Good 1961 25.3 m 2,874
OTTER CREEK Montana Good 1961 25.3 m 2,874
OTTER CREEK Montana Good 1961 25.3 m 2,874
LITTLE BLACKFOOT RIVER Montana Fair 1982 28.0 m 2,872
BEAVERHEAD RIVER Montana Fair 1949 55.2 m 2,865
SEP LOCAL ROAD Montana Fair 1983 19.2 m 2,863

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.