Browse Bridge Database
4,646 bridges in the FHWA National Bridge Inventory in Idaho.
National Bridge Inventory Database
Browse 4,646 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 |
|---|---|---|---|---|---|
| SNAKE RIVER;MILNER DAM | Idaho | Fair | 1986 | 83.8 m | 360 |
| LAKE FORK CREEK | Idaho | Good | 2017 | 26.8 m | 360 |
| T.F.NORTHSIDE MAIN CNL | Idaho | Fair | 1986 | 19.8 m | 360 |
| MILNER GOODING CANAL | Idaho | Fair | 1986 | 19.8 m | 360 |
| ST. ANTHONY CANAL | Idaho | Good | 2010 | 10.1 m | 360 |
| J CANAL | Idaho | Fair | 1986 | 10.1 m | 360 |
| U CANAL | Idaho | Fair | 1962 | 31.7 m | 360 |
| S.FK.COEUR DALENE RIVER | Idaho | Poor | 1978 | 9.8 m | 360 |
| LITTLE BEAR CREEK | Idaho | Fair | 1965 | 6.1 m | 360 |
| FARMERS COOP SEBREE CNL | Idaho | Fair | 1977 | 8.8 m | 360 |
| 700 CREEK | Idaho | Good | 1965 | 6.1 m | 360 |
| LITTLE HANGMAN CREEK | Idaho | Poor | 1977 | 16.2 m | 350 |
| ST. MARIES RIVER | Idaho | Fair | 2015 | 82.6 m | 350 |
| I90;YELLOWSTONE TRAIL GS | Idaho | Fair | 1991 | 82.3 m | 350 |
| BEAR R.;GRACE-TURNER BR. | Idaho | Fair | 1955 | 92.7 m | 350 |
| DRY BED CANAL;MIDWAY BR. | Idaho | Good | 1977 | 23.8 m | 350 |
| SALMON RIVER | Idaho | Good | 2012 | 73.5 m | 350 |
| SALMON RIVER | Idaho | Good | 2012 | 73.9 m | 350 |
| HIGH LINE CANAL | Idaho | Fair | 1981 | 7.6 m | 350 |
| SAND CREEK | Idaho | Fair | 2001 | 9.1 m | 350 |
| N. FK. PAYETTE RIVER | Idaho | Good | 1957 | 39.3 m | 350 |
| MIDDLE LINE CANAL | Idaho | Good | 1959 | 7.7 m | 350 |
| MORA CANAL | Idaho | Fair | 1982 | 8.5 m | 350 |
| PINE CREEK | Idaho | Poor | 2012 | 12.3 m | 350 |
| BIG WOOD RIVER | Idaho | Fair | 2001 | 35.4 m | 350 |
| MORA CANAL | Idaho | Fair | 1976 | 21.3 m | 350 |
| PAYETTE RIVER;GARDENA BR | Idaho | Fair | 1920 | 89.0 m | 350 |
| CEDAR DRAW | Idaho | Fair | 1963 | 7.3 m | 350 |
| HIGH LINE CANAL | Idaho | Fair | 1968 | 24.7 m | 350 |
| R CANAL | Idaho | Fair | 1950 | 8.2 m | 350 |
| HIGH LINE CANAL | Idaho | Fair | 1963 | 21.3 m | 350 |
| CLEAR CREEK | Idaho | Fair | 1965 | 19.2 m | 340 |
| BANNOCK CR.;MICHAUD BR. | Idaho | Good | 1964 | 7.0 m | 340 |
| BLACKFOOT RIVER OVERFLOW | Idaho | Fair | 1964 | 23.8 m | 340 |
| MORA CANAL | Idaho | Fair | 1970 | 22.3 m | 340 |
| ANDERSON CANAL | Idaho | Fair | 1961 | 7.6 m | 340 |
| FARMERS COOP CANAL | Idaho | Fair | 1967 | 7.0 m | 340 |
| CLEARWATER RIVER | Idaho | Fair | 2023 | 245.4 m | 340 |
| FARMERS COOP CANAL | Idaho | Good | 2023 | 9.1 m | 340 |
| MARSH CREEK | Idaho | Good | 2018 | 6.4 m | 340 |
| ROCK CREEK; SE POTLATCH | Idaho | Fair | 1975 | 6.1 m | 340 |
| ST ANTHONY CANAL | Idaho | Fair | 1978 | 15.5 m | 340 |
| W.FK.ST MARIES RIVER | Idaho | Fair | 1957 | 18.3 m | 340 |
| MARBLE CREEK | Idaho | Fair | 1974 | 59.7 m | 330 |
| ST JOE RIVER;AVERY BR | Idaho | Fair | 1935 | 159.4 m | 330 |
| DEER FLAT HIGHLINE CNL | Idaho | Fair | 1981 | 10.7 m | 330 |
| N.FK.PAYETTE RIVER | Idaho | Good | 1977 | 98.1 m | 330 |
| SQUAW CREEK | Idaho | Poor | 1960 | 7.3 m | 330 |
| SQUAW CREEK | Idaho | Poor | 1960 | 7.3 m | 330 |
| LOW LINE CANAL | Idaho | Fair | 1965 | 15.8 m | 330 |
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.