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 |
|---|---|---|---|---|---|
| RR | Montana | Good | 2002 | 70.1 m | 5,732 |
| S HELENA INT I 15 156 | Montana | Good | 2007 | 56.8 m | 5,722 |
| KOOTENAI RIVER | Montana | Fair | 1959 | 212.7 m | 5,674 |
| MIDDLE FK FLATHEAD RIVER | Montana | Fair | 1966 | 133.8 m | 5,658 |
| SEP E MULLAN ROAD | Montana | Fair | 1963 | 39.6 m | 5,626 |
| INT TURAH | Montana | Fair | 1964 | 36.0 m | 5,626 |
| SEP E MULLAN ROAD | Montana | Fair | 1963 | 39.6 m | 5,626 |
| RR | Montana | Fair | 1963 | 107.0 m | 5,626 |
| INT TURAH | Montana | Fair | 1964 | 36.6 m | 5,626 |
| RR | Montana | Fair | 1963 | 108.3 m | 5,626 |
| RR | Montana | Fair | 1936 | 82.0 m | 5,606 |
| SEP COUNTY ROAD | Montana | Fair | 1969 | 24.1 m | 5,599 |
| INT CARDWELL-S 359 | Montana | Fair | 1968 | 42.4 m | 5,599 |
| INT CARDWELL-S 359 | Montana | Fair | 1968 | 42.4 m | 5,599 |
| SEP COUNTY ROAD | Montana | Fair | 1969 | 24.1 m | 5,599 |
| BOULDER RIVER | Montana | Good | 1968 | 37.7 m | 5,599 |
| BOULDER RIVER | Montana | Fair | 1968 | 34.7 m | 5,599 |
| CANYON CREEK 050 | Montana | Good | 1959 | 36.6 m | 5,570 |
| SEP I 15 | Montana | Fair | 1963 | 81.0 m | 5,500 |
| INT NINE MILE | Montana | Fair | 1964 | 37.8 m | 5,499 |
| SEP HOULE CREEK ROAD | Montana | Fair | 1971 | 24.1 m | 5,499 |
| SEP HOULE CREEK ROAD | Montana | Fair | 1971 | 24.1 m | 5,499 |
| INT NINE MILE | Montana | Fair | 1964 | 37.8 m | 5,499 |
| DEEP CREEK | Montana | Fair | 2012 | 26.8 m | 5,485 |
| HELENA VALLEY CANAL 081 | Montana | Fair | 1958 | 13.2 m | 5,482 |
| INT I 15 | Montana | Fair | 1963 | 59.1 m | 5,476 |
| INT I-15 | Montana | Fair | 1963 | 58.8 m | 5,476 |
| INT GREYCLIFF | Montana | Fair | 1972 | 39.0 m | 5,423 |
| INT REED POINT | Montana | Fair | 1963 | 40.8 m | 5,423 |
| YELLOWSTONE RIVER | Montana | Fair | 1961 | 170.0 m | 5,423 |
| GREYCLIFF CREEK RD | Montana | Fair | 1972 | 23.8 m | 5,423 |
| INT GREYCLIFF | Montana | Fair | 1972 | 39.0 m | 5,423 |
| RR | Montana | Fair | 1976 | 87.4 m | 5,423 |
| RR | Montana | Fair | 1962 | 75.9 m | 5,423 |
| BERRY CREEK | Montana | Good | 1963 | 31.1 m | 5,423 |
| SEP HUMP CREEK ROAD | Montana | Fair | 1963 | 31.1 m | 5,423 |
| SEP WORK CREEK ROAD | Montana | Fair | 1972 | 39.0 m | 5,423 |
| YELLOWSTONE RIVER | Montana | Fair | 1976 | 176.1 m | 5,423 |
| INT REED POINT | Montana | Good | 1963 | 40.8 m | 5,423 |
| SEP WORK CREEK ROAD | Montana | Fair | 1972 | 39.0 m | 5,423 |
| BRIDGER CREEK | Montana | Fair | 1972 | 51.5 m | 5,423 |
| SEP HUMP CREEK ROAD | Montana | Fair | 1972 | 31.4 m | 5,423 |
| INT BRIDGER CREEK | Montana | Fair | 1972 | 37.5 m | 5,423 |
| INT BRIDGER CREEK | Montana | Fair | 1972 | 37.5 m | 5,423 |
| BRIDGER CREEK | Montana | Fair | 1972 | 51.5 m | 5,423 |
| GREYCLIFF CREEK RD | Montana | Fair | 1972 | 23.8 m | 5,423 |
| BBWA CANAL 181 | Montana | Fair | 1970 | 13.1 m | 5,400 |
| INT W HARDIN I 90 | Montana | Fair | 1970 | 86.8 m | 5,396 |
| BIG SPRING CREEK | Montana | Fair | 1962 | 9.1 m | 5,357 |
| SEP SAGER LANE | Montana | Good | 1975 | 24.1 m | 5,354 |
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.