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 | Fair | 1965 | 103.3 m | 4,088 |
| RR | Montana | Fair | 1981 | 100.2 m | 4,088 |
| SEP ELIZABETH LN | Montana | Poor | 1965 | 135.9 m | 4,088 |
| INT TARKIO COUNTY ROAD | Montana | Fair | 1959 | 39.6 m | 4,088 |
| INT TARKIO COUNTY ROAD | Montana | Fair | 1959 | 39.6 m | 4,088 |
| SEP ELIZABETH LN | Montana | Good | 1981 | 136.5 m | 4,088 |
| CLARK FORK RIVER | Montana | Poor | 1965 | 245.9 m | 4,088 |
| CLARK FORK RIVER | Montana | Fair | 1981 | 264.2 m | 4,088 |
| INT DREXEL | Montana | Fair | 1980 | 37.3 m | 4,056 |
| ST. REGIS RIVER | Montana | Fair | 1981 | 133.5 m | 4,056 |
| INT TWO MILE-ST REGIS R | Montana | Fair | 1981 | 87.2 m | 4,056 |
| ST. REGIS RIVER | Montana | Good | 1981 | 114.6 m | 4,056 |
| ST. REGIS RIVER | Montana | Fair | 1981 | 118.2 m | 4,056 |
| ST. REGIS RIVER | Montana | Fair | 1981 | 64.7 m | 4,056 |
| INT DREXEL | Montana | Fair | 1980 | 37.3 m | 4,056 |
| ST. REGIS RIVER | Montana | Fair | 1981 | 122.6 m | 4,056 |
| INT TWO MILE-ST REGIS R | Montana | Fair | 1981 | 86.8 m | 4,056 |
| ST. REGIS RIVER | Montana | Fair | 1981 | 122.6 m | 4,056 |
| YELLOWSTONE RIVER 170 | Montana | Poor | 1949 | 311.5 m | 4,005 |
| TWELVE MILE CREEK 169 | Montana | Fair | 1947 | 30.7 m | 4,005 |
| LONE TREE CREEK | Montana | Fair | 1974 | 27.4 m | 3,968 |
| PRYOR CREEK | Montana | Fair | 1969 | 78.0 m | 3,946 |
| SEP COUNTY ROAD | Montana | Fair | 1972 | 24.1 m | 3,946 |
| SEP INDIAN CR FRONTAGE R | Montana | Fair | 1972 | 24.1 m | 3,946 |
| SEP COUNTY ROAD | Montana | Fair | 1972 | 24.1 m | 3,946 |
| INT ARROW CREEK | Montana | Fair | 1972 | 36.3 m | 3,946 |
| INT ARROW CREEK | Montana | Fair | 1972 | 36.3 m | 3,946 |
| SEP INDIAN CR FRONTAGE R | Montana | Fair | 1972 | 24.1 m | 3,946 |
| BLACKFOOT RIVER | Montana | Fair | 1947 | 75.6 m | 3,932 |
| DRAINAGE IRR DITCH | Montana | Fair | 1973 | 7.0 m | 3,915 |
| CANYON CREEK | Montana | Fair | 1959 | 46.6 m | 3,901 |
| HOT SPRINGS CREEK | Montana | Good | 1997 | 8.0 m | 3,900 |
| INT CROW AGENCY | Montana | Fair | 1959 | 40.8 m | 3,889 |
| INT CROW AGENCY | Montana | Fair | 1959 | 40.8 m | 3,889 |
| LITTLE BIGHORN RIVER | Montana | Fair | 1949 | 39.6 m | 3,889 |
| LITTLE BIGHORN RIVER | Montana | Fair | 1959 | 50.1 m | 3,889 |
| BBWA CANAL | Montana | Good | 1988 | 11.3 m | 3,881 |
| ASH CREEK | Montana | Fair | 1969 | 9.1 m | 3,878 |
| SEP GALENA GULCH ROAD | Montana | Fair | 1981 | 23.8 m | 3,856 |
| INT BASIN | Montana | Fair | 1985 | 40.5 m | 3,856 |
| INT HIGH ORE | Montana | Fair | 1982 | 40.5 m | 3,856 |
| BOULDER RIVER | Montana | Fair | 1980 | 59.7 m | 3,856 |
| BOULDER RVR-FRONTAGE RD | Montana | Fair | 1982 | 46.3 m | 3,856 |
| RR (NOT IN USE) | Montana | Fair | 1971 | 49.7 m | 3,853 |
| RR (NOT IN USE) | Montana | Fair | 1971 | 49.7 m | 3,853 |
| BIRCH CREEK | Montana | Fair | 1973 | 7.8 m | 3,852 |
| HYALITE CREEK | Montana | Good | 2019 | 12.6 m | 3,839 |
| CLARK FORK RIVER | Montana | Fair | 1966 | 244.1 m | 3,825 |
| INT LOZEAU COUNTY ROAD | Montana | Fair | 1967 | 39.0 m | 3,825 |
| CLARK FORK RIVER | Montana | Fair | 1960 | 244.1 m | 3,825 |
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.