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 |
|---|---|---|---|---|---|
| PORTNEUF RIVER | Idaho | Good | 2005 | 15.5 m | 108 |
| SALMON RIVER;SW.CLAYTON | Idaho | Fair | 1970 | 42.7 m | 106 |
| SIDEHILL CANAL | Idaho | Fair | 1956 | 6.7 m | 106 |
| FIGHTING CREEK | Idaho | Good | 2021 | 16.2 m | 101 |
| CASCADE DAM SPILLWAY | Idaho | Fair | 1947 | 14.6 m | 100 |
| South Fork of the Snake | Idaho | Good | 2012 | 94.5 m | 100 |
| RAPID CREEK | Idaho | Fair | 1997 | 7.6 m | 100 |
| FORT HALL MAIN CANAL | Idaho | Fair | 1980 | 9.8 m | 100 |
| TRAIL CREEK | Idaho | Fair | 1965 | 7.0 m | 100 |
| PORTNEUF R;NW.INKOM BR | Idaho | Fair | 1948 | 12.8 m | 100 |
| PORTNEUF MARSH VALLY CNL | Idaho | Good | 2019 | 8.5 m | 100 |
| PORTNEUF RIVER | Idaho | Fair | 1945 | 24.7 m | 100 |
| I 15 NB-SB;BOWMAN RD.GS | Idaho | Fair | 1971 | 83.5 m | 100 |
| BEAR RIVER | Idaho | Fair | 2005 | 59.4 m | 100 |
| PEOPLES CANAL | Idaho | Fair | 1978 | 9.8 m | 100 |
| HIGH LINE CANAL | Idaho | Fair | 1975 | 11.6 m | 100 |
| LOW LINE CANAL | Idaho | Fair | 1972 | 16.5 m | 100 |
| ABERDEEN SPRINGFIELD CNL | Idaho | Fair | 1984 | 12.2 m | 100 |
| HIGH LINE CANAL | Idaho | Fair | 1971 | 13.4 m | 100 |
| CORBETT SLOUGH CANAL | Idaho | Good | 1965 | 8.2 m | 100 |
| ABERDEEN SPRINGFIELD CNL | Idaho | Fair | 1963 | 29.6 m | 100 |
| LOW LINE CANAL | Idaho | Fair | 1966 | 14.0 m | 100 |
| GIBSON CANAL | Idaho | Fair | 1952 | 6.7 m | 100 |
| LOW LINE CANAL | Idaho | Fair | 1973 | 9.4 m | 100 |
| ABERDEEN SPRINGFIELD CNL | Idaho | Fair | 2018 | 28.0 m | 100 |
| LOW LINE CANAL | Idaho | Fair | 1970 | 9.8 m | 100 |
| HIGH LINE CANAL | Idaho | Fair | 1980 | 12.2 m | 100 |
| E.BR.SNAKE R.VALLEY CNL | Idaho | Good | 1974 | 7.9 m | 100 |
| PEOPLES CANAL | Idaho | Fair | 1976 | 10.7 m | 100 |
| HIGH LINE CANAL | Idaho | Fair | 1974 | 23.8 m | 100 |
| ABERDEEN SPRINGFIELD CNL | Idaho | Fair | 1967 | 26.2 m | 100 |
| LOW LINE CANAL | Idaho | Fair | 1935 | 9.4 m | 100 |
| HIGH LINE CANAL | Idaho | Fair | 1980 | 15.8 m | 100 |
| LATERAL C CANAL | Idaho | Fair | 1973 | 7.6 m | 100 |
| E.BR.SNAKE R.VALLEY CNL | Idaho | Fair | 1968 | 6.7 m | 100 |
| BEAR RIVER | Idaho | Poor | 1972 | 30.5 m | 100 |
| BLACKFOOT RIVER | Idaho | Good | 2001 | 21.6 m | 100 |
| DIAMOND CREEK | Idaho | Fair | 1990 | 8.8 m | 100 |
| WEST CACHE CANAL | Idaho | Fair | 1960 | 11.0 m | 100 |
| ROCK CREEK | Idaho | Fair | 1971 | 13.4 m | 100 |
| TRAIL CREEK | Idaho | Fair | 1965 | 11.0 m | 100 |
| S.FK. ROCK CREEK | Idaho | Fair | 1980 | 14.9 m | 100 |
| LANES GULCH | Idaho | Good | 1981 | 6.9 m | 100 |
| ROCK CR;REGISTER ROCK BR | Idaho | Fair | 1981 | 26.2 m | 100 |
| BELLEVUE CANAL | Idaho | Fair | 2000 | 8.2 m | 100 |
| BIG WOOD RIVER | Idaho | Fair | 1975 | 21.3 m | 100 |
| BELLEVUE CANAL | Idaho | Fair | 1993 | 8.5 m | 100 |
| CEDAR CREEK | Idaho | Fair | 1961 | 6.1 m | 100 |
| KNOWLTON CREEK | Idaho | Good | 2024 | 18.7 m | 100 |
| W.FK.PINE CREEK | Idaho | Fair | 1975 | 22.6 m | 100 |
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.