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 |
|---|---|---|---|---|---|
| TRAIL CREEK | Idaho | Good | 1988 | 6.1 m | 5,000 |
| RR ROADBED/NO TRACKS | Idaho | Fair | 1975 | 56.4 m | 5,000 |
| MILNER GOODING CANAL | Idaho | Good | 2013 | 10.4 m | 5,000 |
| BIG WOOD RIVER | Idaho | Fair | 2013 | 50.9 m | 5,000 |
| RIDENBAUGH CANAL | Idaho | Good | 1992 | 12.5 m | 5,000 |
| PHYLLIS CANAL | Idaho | Fair | 1995 | 6.7 m | 5,000 |
| BOISE RIVER;RAMP DA BR | Idaho | Fair | 1980 | 122.2 m | 5,000 |
| BOISE RIVER;RAMP AB BR | Idaho | Fair | 1980 | 122.8 m | 5,000 |
| CLWATER R.;NPRR;ARROW BR | Idaho | Fair | 1972 | 380.4 m | 4,900 |
| COTTONWOOD CREEK | Idaho | Fair | 1997 | 27.7 m | 4,900 |
| MIDDLETON CANAL | Idaho | Fair | 1971 | 7.9 m | 4,900 |
| FALL RIVER CANAL | Idaho | Fair | 1973 | 9.8 m | 4,900 |
| FALL RIVER CANAL | Idaho | Fair | 1994 | 10.1 m | 4,900 |
| BUTTE ARM CANAL | Idaho | Fair | 1943 | 12.8 m | 4,900 |
| DRY CREEK | Idaho | Fair | 1959 | 7.0 m | 4,900 |
| UPRR;PAYETTE OVERPASS | Idaho | Fair | 1962 | 195.7 m | 4,900 |
| MARSH CREEK | Idaho | Fair | 1960 | 7.3 m | 4,900 |
| ST MARIES RR | Idaho | Good | 2019 | 36.3 m | 4,800 |
| ST JOE RIVER | Idaho | Good | 2019 | 131.4 m | 4,800 |
| I 84; BLACK CAT RD GS | Idaho | Good | 2009 | 59.7 m | 4,800 |
| OAKLAND WASTE DITCH | Idaho | Good | 1976 | 6.7 m | 4,800 |
| RIDENBAUGH CANAL | Idaho | Fair | 1991 | 9.8 m | 4,800 |
| BLACKFOOT CANAL | Idaho | Good | 2004 | 8.5 m | 4,800 |
| RIDENBAUGH CANAL | Idaho | Good | 1992 | 10.4 m | 4,800 |
| UPRR;12TH ST.;MONTPELIER | Idaho | Fair | 1971 | 219.5 m | 4,800 |
| CLEARWATER R.(KAMIAH BR) | Idaho | Fair | 1998 | 204.8 m | 4,700 |
| PORTNEUF RIVER;MCCAMMON | Idaho | Fair | 1963 | 63.1 m | 4,700 |
| UPRR;N.MCCAMMON OP | Idaho | Fair | 1963 | 56.7 m | 4,700 |
| NOBLE CANAL | Idaho | Fair | 1956 | 9.8 m | 4,700 |
| SNAKE RIVER;KEN CURTIS | Idaho | Fair | 1968 | 61.3 m | 4,700 |
| FARMERS UNION CANAL | Idaho | Fair | 1992 | 7.3 m | 4,700 |
| BURLINGTON NORTHERN RR | Idaho | Good | 2019 | 72.2 m | 4,700 |
| N.FK.PAYETTE RIVER | Idaho | Fair | 1984 | 87.5 m | 4,700 |
| S.FK.TETON RIVER | Idaho | Fair | 1977 | 32.9 m | 4,700 |
| CEDAR POINT CANAL | Idaho | Good | 2004 | 6.1 m | 4,600 |
| PHYLLIS CANAL | Idaho | Good | 2003 | 7.9 m | 4,600 |
| SIDDOWAY CANAL | Idaho | Fair | 1984 | 6.4 m | 4,600 |
| TYHEE WASTEWAY CANAL | Idaho | Fair | 1925 | 9.8 m | 4,600 |
| PORTNEUF RIVER | Idaho | Good | 2023 | 21.3 m | 4,600 |
| RESERVATION CANAL | Idaho | Good | 2000 | 14.3 m | 4,600 |
| BLACKFOOT CANAL | Idaho | Poor | 1951 | 13.1 m | 4,600 |
| IDAHO CANAL | Idaho | Fair | 1957 | 21.3 m | 4,500 |
| US 95R SBL;LEWISTON IC | Idaho | Fair | 1977 | 115.8 m | 4,500 |
| PORTNEUF RIVER | Idaho | Fair | 1953 | 17.1 m | 4,500 |
| RICHFIELD CANAL | Idaho | Fair | 1955 | 27.4 m | 4,500 |
| PARADISE CREEK | Idaho | Good | 2010 | 19.5 m | 4,500 |
| DRY CREEK | Idaho | Good | 2018 | 20.7 m | 4,500 |
| BIG WOOD RIVER | Idaho | Fair | 1955 | 30.5 m | 4,500 |
| SPRING CREEK | Idaho | Fair | 1961 | 7.9 m | 4,400 |
| INL CENTRAL CONNECTOR | Idaho | Fair | 1993 | 8.5 m | 4,400 |
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.