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 |
|---|---|---|---|---|---|
| PORCUPINE CREEK OVERFLOW | Montana | Fair | 2006 | 38.8 m | 1,584 |
| RATTLESNAKE CREEK | Montana | Fair | 1932 | 16.2 m | 1,577 |
| INT WOODVILLE | Montana | Fair | 1976 | 45.1 m | 1,576 |
| INT WOODVILLE | Montana | Fair | 1976 | 45.1 m | 1,576 |
| SEP SAWMILL GULCH | Montana | Fair | 1976 | 37.5 m | 1,576 |
| SEP SAWMILL GULCH | Montana | Fair | 1976 | 37.5 m | 1,576 |
| INT TRASK-LOWLAND RD | Montana | Good | 1976 | 39.0 m | 1,576 |
| INT TRASK-LOWLAND RD | Montana | Good | 1976 | 39.0 m | 1,576 |
| SEP ELK PARK-E ELK PARK | Montana | Fair | 1985 | 24.7 m | 1,576 |
| SEP ELK PARK-E ELK PARK | Montana | Fair | 1985 | 24.7 m | 1,576 |
| CAINS COULEE 097 | Montana | Fair | 1965 | 9.0 m | 1,562 |
| MARRON CREEK | Montana | Fair | 1983 | 7.7 m | 1,559 |
| ATOR CREEK | Montana | Fair | 1984 | 7.5 m | 1,559 |
| USRS CANAL | Montana | Fair | 1988 | 23.2 m | 1,556 |
| MILLIGAN CREEK | Montana | Fair | 1968 | 31.1 m | 1,553 |
| PEDESTRIAN UNDERPASS | Montana | Poor | 1972 | 14.0 m | 1,548 |
| RR | Montana | Fair | 1957 | 105.4 m | 1,537 |
| BULL RIVER | Montana | Fair | 1952 | 50.3 m | 1,537 |
| RR | Montana | Poor | 1957 | 96.0 m | 1,537 |
| HELENA VALLEY CANAL 115 | Montana | Fair | 1958 | 8.5 m | 1,535 |
| GRAVEYARD COULEE 093 | Montana | Fair | 1965 | 10.1 m | 1,533 |
| SEP COUNTY ROAD | Montana | Fair | 1976 | 23.5 m | 1,520 |
| SEP COUNTY ROAD | Montana | Fair | 1976 | 22.9 m | 1,520 |
| LITTLE MUDDY CREEK | Montana | Fair | 2010 | 55.3 m | 1,516 |
| RED BANK CREEK | Montana | Good | 2010 | 38.3 m | 1,516 |
| JEFFERSON RIVER | Montana | Fair | 1949 | 75.3 m | 1,515 |
| INDIAN SERVICE CANAL | Montana | Fair | 1960 | 8.2 m | 1,514 |
| PONDERA CANAL | Montana | Fair | 1972 | 22.3 m | 1,510 |
| PONDERA CANAL | Montana | Good | 1972 | 21.9 m | 1,510 |
| CLARKS FORK YELLOWSTONE | Montana | Good | 1970 | 79.5 m | 1,507 |
| FLAT CREEK | Montana | Fair | 1986 | 12.5 m | 1,507 |
| BIG SANDY CREEK | Montana | Good | 1954 | 44.5 m | 1,506 |
| RR | Montana | Fair | 2001 | 74.0 m | 1,504 |
| SWAN RIVER 110 | Montana | Poor | 1911 | 36.6 m | 1,503 |
| MID FORK MADISON RIVER | Montana | Fair | 1990 | 29.8 m | 1,501 |
| MADISON RIVER | Montana | Fair | 1948 | 68.2 m | 1,501 |
| LONE TREE CREEK 083 | Montana | Fair | 1999 | 37.6 m | 1,494 |
| MADISON RIVER | Montana | Fair | 1961 | 79.1 m | 1,490 |
| Chapman Coulee | Montana | Good | 2024 | 21.6 m | 1,484 |
| Mooney Coulee | Montana | Good | 2024 | 30.5 m | 1,484 |
| RICHARDSON COULEE | Montana | Fair | 1979 | 8.4 m | 1,484 |
| PONDERA COULEE | Montana | Good | 1972 | 37.8 m | 1,480 |
| PONDERA COULEE | Montana | Good | 1972 | 37.8 m | 1,480 |
| OSWEGO CREEK | Montana | Fair | 1973 | 18.6 m | 1,479 |
| FLYNN CREEK | Montana | Fair | 1956 | 17.8 m | 1,479 |
| TWO MEDICINE CANAL | Montana | Fair | 1950 | 15.5 m | 1,475 |
| EXETER CREEK | Montana | Good | 1990 | 7.8 m | 1,474 |
| SOUTH FORK SUNDAY CREEK | Montana | Fair | 1930 | 50.0 m | 1,474 |
| IRRIGATION CANAL 003 | Montana | Good | 2003 | 8.7 m | 1,471 |
| YELLOWSTONE RIVER 004 | Montana | Fair | 1949 | 92.5 m | 1,471 |
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.