Poor Condition Bridges in Idaho
250 bridges rated Poor condition in Idaho. FHWA National Bridge Inventory.
Bridges Rated Poor Condition
A bridge is rated Poor when one or more of its major components (deck, superstructure, or substructure) has a condition rating of 4 or below on the FHWA 0–9 scale. Poor condition does not mean imminent danger of collapse, but indicates significant deterioration requiring priority maintenance or replacement. There are 250 such bridges in Idaho.
| Bridge | State | Condition | Year Built | ADT | Length |
|---|---|---|---|---|---|
| DRY CREEK | Idaho | 1930 | 30 | 18.9 m | |
| CLOVER CREEK | Idaho | 1985 | 30 | 12.5 m | |
| EAST MAIN CANAL | Idaho | 1965 | 30 | 12.2 m | |
| WILDHORSE RIVER | Idaho | 1908 | 30 | 14.6 m | |
| FALL CREEK | Idaho | 1987 | 30 | 15.8 m | |
| BLACK WARRIOR CREEK | Idaho | 1975 | 30 | 9.4 m | |
| QUEENS RIVER NO. 2 | Idaho | 1962 | 30 | 19.2 m | |
| M.FK.BOISE RIVER(KIRBY) | Idaho | 1991 | 30 | 41.8 m | |
| COTTONWOOD CREEK | Idaho | 1960 | 30 | 9.1 m | |
| HANGMAN CREEK | Idaho | 1981 | 30 | 17.0 m | |
| N.FK.EAST RIVER | Idaho | 1939 | 30 | 37.2 m | |
| RUBY CREEK(#4) | Idaho | 1970 | 30 | 7.3 m | |
| HENRYS FK SNAKE RIVER | Idaho | 1925 | 30 | 47.9 m | |
| MORES CREEK | Idaho | 1962 | 30 | 7.9 m | |
| JOHNSON CREEK | Idaho | 1977 | 30 | 21.3 m | |
| Milner Gooding Canal | Idaho | 1960 | 25 | 21.3 m | |
| Dietrich Main Canal | Idaho | 1987 | 25 | 19.6 m | |
| Twin Falls N. Side Canal | Idaho | 1964 | 25 | 9.6 m | |
| NAPIAS CREEK | Idaho | 1953 | 25 | 7.9 m | |
| S.FK.CDA R.;EB OFF RAMP | Idaho | 1964 | 20 | 53.3 m | |
| LITTLE WOOD RIVER | Idaho | 1930 | 20 | 10.4 m | |
| N. GOODING CANAL | Idaho | 1975 | 20 | 8.5 m | |
| MILNER GOODING CANAL | Idaho | 1977 | 20 | 24.1 m | |
| LITTLE SALMON RIVER | Idaho | 1923 | 20 | 19.2 m | |
| WEISER RIVER | Idaho | 1982 | 20 | 18.6 m | |
| SHAFER CREEK | Idaho | 1914 | 20 | 11.3 m | |
| REYNOLDS CREEK | Idaho | 1960 | 20 | 9.8 m | |
| CRANE CREEK | Idaho | 1955 | 20 | 18.6 m | |
| L.W.BR.PRIEST R;MOORE CR | Idaho | 1980 | 20 | 12.2 m | |
| CAMAS CREEK | Idaho | 1972 | 20 | 9.1 m | |
| ELK CREEK | Idaho | 1961 | 20 | 7.3 m | |
| ELK CREEK | Idaho | 1961 | 20 | 7.4 m | |
| MIDDLE FORK BOISE RIVER | Idaho | 1957 | 20 | 42.8 m | |
| GRIMES CREEK | Idaho | 1954 | 20 | 16.3 m | |
| THIRD FK.CHIEF EAGLE EYE | Idaho | 1963 | 20 | 12.2 m | |
| SLOUGH BRIDGE | Idaho | 1912 | 15 | 29.6 m | |
| TROUT CREEK | Idaho | 1912 | 15 | 27.1 m | |
| SOUTH FORK BOISE RIVER | Idaho | 1989 | 12 | 21.3 m | |
| RICHFIELD CANAL | Idaho | 1932 | 10 | 31.1 m | |
| BIG WOOD RIVER | Idaho | 1945 | 10 | 28.0 m | |
| CROSSCUT CANAL | Idaho | 1937 | 10 | 10.4 m | |
| MARYSVILLE CANAL | Idaho | 1976 | 10 | 7.6 m | |
| N. BRANCH FALL RIVER CNL | Idaho | 1932 | 10 | 7.3 m | |
| FALL RIVER OVERFLOW | Idaho | 1932 | 10 | 7.3 m | |
| SOUTH FORK SALMON RIVER | Idaho | 1934 | 10 | 94.5 m | |
| SAVAGE CREEK | Idaho | 2006 | 10 | 13.5 m | |
| BEAR VALLEY CREEK | Idaho | 1960 | 10 | 7.5 m | |
| U CANAL | Idaho | 1934 | 5 | 46.3 m | |
| LITTLE WOOD RIVER | Idaho | 1965 | 5 | 16.2 m | |
| BEAR CREEK | Idaho | 1983 | 5 | 11.0 m |
About Poor Condition Bridge Ratings
FHWA rates bridge components on a 0–9 scale. A rating of 4 or below on any major component (deck, superstructure, substructure) classifies the bridge as Poor condition. The bridge remains open to traffic but requires priority attention. Bridges rated 0–2 are immediately closed.