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 |
|---|---|---|---|---|---|
| GAME CREEK | Idaho | Fair | 2001 | 7.0 m | 60 |
| VALLEY CREEK | Idaho | Good | 1986 | 12.2 m | 60 |
| CLEAR CREEK | Idaho | Fair | 1966 | 9.1 m | 60 |
| CLEAR CREEK | Idaho | Fair | 1966 | 7.9 m | 60 |
| CLEAR CREEK | Idaho | Fair | 1966 | 9.1 m | 60 |
| WILLOW CREEK | Idaho | Fair | 1968 | 19.5 m | 60 |
| CLEAR CREEK | Idaho | Fair | 1966 | 7.9 m | 60 |
| NORTH FORK BOISE RIVER | Idaho | Fair | 1949 | 40.6 m | 59 |
| BANNOCK CREEK | Idaho | Fair | 1971 | 25.4 m | 55 |
| BLACKFOOT RIVER | Idaho | Fair | 1971 | 13.1 m | 55 |
| LONG ISLAND CANAL | Idaho | Fair | 1969 | 7.3 m | 50 |
| PLEASANT VALLEY CREEK | Idaho | Fair | 1934 | 140.2 m | 50 |
| PORTNEUF MARSH VAL.CNL | Idaho | Poor | 1968 | 8.2 m | 50 |
| PORTNEUF MARSH VAL.CNL | Idaho | Fair | 1957 | 8.5 m | 50 |
| I 15;2-1/2 MILE ROAD GS | Idaho | Good | 1959 | 64.6 m | 50 |
| BEAR RIVER | Idaho | Fair | 1916 | 61.6 m | 50 |
| ST. CHARLES CR N. BRIDGE | Idaho | Fair | 1920 | 9.4 m | 50 |
| NEW LAVASIDE CANAL | Idaho | Good | 1969 | 9.1 m | 50 |
| IDAHO CANAL | Idaho | Fair | 1968 | 8.8 m | 50 |
| I 15;MACHINE PASS GS | Idaho | Fair | 1960 | 64.6 m | 50 |
| CHESTERFIELD CANAL | Idaho | Poor | 2005 | 14.0 m | 50 |
| TANNER CANAL;NE.GRACE BR | Idaho | Fair | 1958 | 8.2 m | 50 |
| N. EXTENSION CANAL | Idaho | Fair | 2002 | 8.5 m | 50 |
| DOWNY MARSH VALLEY CNL | Idaho | Fair | 1986 | 7.0 m | 50 |
| N. EXTENSION CANAL | Idaho | Fair | 2002 | 7.6 m | 50 |
| CHESTERFIELD CANAL | Idaho | Good | 2002 | 8.5 m | 50 |
| BLACKFOOT RIVER | Idaho | Fair | 1970 | 18.3 m | 50 |
| CUB RIVER;S.MAPLETON BR | Idaho | Fair | 1979 | 8.2 m | 50 |
| CUB RIVER;NE.FRANKLIN BR | Idaho | Fair | 1970 | 9.1 m | 50 |
| BEAR RIVER (REDPOINT BR) | Idaho | Fair | 1980 | 31.7 m | 50 |
| GOLD FORK RIVER | Idaho | Fair | 1966 | 10.5 m | 50 |
| DAIRY CANYON CREEK | Idaho | Fair | 1983 | 9.4 m | 50 |
| I 86;CO FRONTAGE RD GS | Idaho | Fair | 1983 | 110.9 m | 50 |
| W.BR.LITTLE WOOD RIVER | Idaho | Fair | 1952 | 7.9 m | 50 |
| SALMON RIVER | Idaho | Good | 1974 | 7.3 m | 50 |
| SKI TRAIL | Idaho | Fair | 1995 | 13.7 m | 50 |
| GOLD FORK RIVER | Idaho | Fair | 1966 | 12.3 m | 50 |
| BIG LOST RIVER | Idaho | Fair | 1977 | 21.3 m | 50 |
| LITTLE BEAR CREEK | Idaho | Good | 2020 | 17.7 m | 50 |
| BIG CREEK;SE.CALDER BR | Idaho | Fair | 1960 | 31.1 m | 50 |
| SOUTH FORK CDA RIVER | Idaho | Fair | 1985 | 40.8 m | 50 |
| ANDERSON CANAL | Idaho | Fair | 1935 | 10.7 m | 50 |
| WILLOW CREEK | Idaho | Good | 1962 | 24.7 m | 50 |
| ANDERSON CANAL | Idaho | Good | 2004 | 7.3 m | 50 |
| E.BRANCH BIG LOST RIVER | Idaho | Fair | 1992 | 11.9 m | 50 |
| BIG LOST RIVER | Idaho | Fair | 1991 | 20.7 m | 50 |
| BIG LOST RIVER | Idaho | Fair | 1978 | 17.4 m | 50 |
| INDEPENDENT CANAL | Idaho | Fair | 1973 | 13.1 m | 50 |
| UPRR;N.SPENCER RR OP | Idaho | Poor | 1936 | 90.2 m | 50 |
| CAMAS CREEK | Idaho | Poor | 1953 | 8.2 m | 50 |
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.