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.
| Bridge | Location | Condition | Year Built | Length | ADT |
|---|---|---|---|---|---|
| TWO LEGGIN CANAL | Montana | Good | 1991 | 21.9 m | 899 |
| TWO LEGGIN CANAL | Montana | Good | 1989 | 17.7 m | 899 |
| BIGHORN RIVER | Montana | Fair | 1958 | 175.5 m | 899 |
| ROCK CREEK 046 | Montana | Fair | 1987 | 42.5 m | 896 |
| MEDICINE LAKE | Montana | Fair | 1975 | 49.1 m | 891 |
| TRAPPER CREEK | Montana | Fair | 1957 | 17.1 m | 888 |
| CANYON CREEK DITCH 085 | Montana | Fair | 1981 | 7.3 m | 887 |
| CANYON CREEK DITCH 108 | Montana | Fair | 1938 | 8.5 m | 887 |
| CANYON CREEK 106 | Montana | Good | 1970 | 46.6 m | 887 |
| BBWA CANAL 107 | Montana | Good | 2003 | 20.9 m | 887 |
| RR 045 | Montana | Good | 2017 | 31.1 m | 881 |
| BIG DITCH 044 | Montana | Fair | 1950 | 14.9 m | 881 |
| CANYON CREEK 048 | Montana | Good | 1967 | 21.3 m | 881 |
| TONGUE RIVER | Montana | Fair | 1970 | 61.5 m | 877 |
| PABLO FEEDER CANAL 085 | Montana | Good | 2009 | 24.4 m | 873 |
| CANYON CREEK | Montana | Good | 1968 | 46.9 m | 872 |
| SILVER BOW CREEK 007 | Montana | Fair | 1987 | 15.5 m | 869 |
| DRY FORK MILK RIVER | Montana | Fair | 1977 | 28.3 m | 866 |
| USBR MAIN CANAL 082 | Montana | Fair | 1999 | 24.2 m | 865 |
| GRAVEYARD COULEE 094 | Montana | Fair | 1965 | 9.7 m | 856 |
| N FORK FIRST HAY CREEK | Montana | Fair | 1937 | 23.2 m | 856 |
| LOW LINE DITCH | Montana | Good | 1989 | 12.8 m | 852 |
| WARM SPRINGS CREEK | Montana | Fair | 2011 | 28.0 m | 851 |
| RR | Montana | Fair | 1953 | 39.6 m | 849 |
| SOBERUP CREEK | Montana | Good | 2003 | 34.8 m | 836 |
| BELT CREEK | Montana | Good | 1968 | 48.8 m | 833 |
| INT COLSTRIP I 94 | Montana | Fair | 1967 | 75.7 m | 833 |
| RR | Montana | Fair | 1983 | 65.6 m | 833 |
| ARMELLS CREEK | Montana | Fair | 1983 | 65.4 m | 833 |
| BELT CREEK | Montana | Poor | 1968 | 50.6 m | 833 |
| COVE DITCH 012 | Montana | Fair | 1928 | 8.2 m | 828 |
| BIG DITCH 010 | Montana | Fair | 1928 | 10.7 m | 828 |
| COVE DITCH 011 | Montana | Fair | 1928 | 9.4 m | 828 |
| EAST GALLATIN RIVER | Montana | Fair | 1967 | 40.5 m | 825 |
| TIMBER CREEK | Montana | Fair | 1998 | 24.1 m | 825 |
| MILL CREEK 040 | Montana | Fair | 1950 | 8.2 m | 824 |
| SOUTH FORK MILK RIVER | Montana | Good | 1987 | 21.6 m | 821 |
| MISSOURI RIVER OVERFLOW | Montana | Poor | 1950 | 85.3 m | 818 |
| MUSSELSHELL RIVER | Montana | Good | 1969 | 52.2 m | 805 |
| ABANDONED RR | Montana | Good | 1969 | 70.1 m | 805 |
| BLUE CREEK | Montana | Good | 1982 | 9.1 m | 801 |
| TONGUE RIVER | Montana | Fair | 1970 | 61.1 m | 800 |
| LOLO CREEK | Montana | Fair | 1951 | 8.5 m | 799 |
| LOLO CREEK | Montana | Poor | 1957 | 27.1 m | 799 |
| LOLO CREEK | Montana | Fair | 1957 | 19.5 m | 799 |
| MANTERNACH COULEE | Montana | Good | 1988 | 6.7 m | 795 |
| HELENA VALLEY CANAL 116 | Montana | Good | 1958 | 8.8 m | 795 |
| LOLO CREEK | Montana | Good | 1951 | 8.5 m | 793 |
| S FORK BUFFALO CREEK | Montana | Fair | 1988 | 18.7 m | 792 |
| DUCK CREEK | Montana | Fair | 1992 | 29.7 m | 792 |
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.