Poor Condition Bridges in Iowa
4,423 bridges rated Poor condition in Iowa. 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 4,423 such bridges in Iowa.
| Bridge | State | Condition | Year Built | ADT | Length |
|---|---|---|---|---|---|
| SMALL STREAM | Iowa | 1900 | 46 | 6.1 m | |
| DD 41 | Iowa | 1948 | 46 | 8.8 m | |
| DD | Iowa | 1976 | 46 | 13.4 m | |
| ARGO SLOUGH | Iowa | 1900 | 46 | 14.0 m | |
| WATERWAY | Iowa | 1951 | 46 | 16.5 m | |
| WATERWAY | Iowa | 1967 | 46 | 12.2 m | |
| NISHNABOTNA RIVER | Iowa | 1959 | 46 | 71.6 m | |
| BLACK CAT CREEK | Iowa | 1964 | 46 | 21.1 m | |
| BRANCH FLANK CREEK | Iowa | 1965 | 46 | 41.8 m | |
| OLD CHANNEL DES MOINES R | Iowa | 1956 | 46 | 18.0 m | |
| BROADHORN CREEK | Iowa | 1915 | 46 | 28.0 m | |
| W FK W NISHNABOTNA RIVER | Iowa | 1944 | 46 | 36.9 m | |
| TRIB OF DICKENSON BRANCH | Iowa | 1965 | 46 | 24.4 m | |
| KILGORE CREEK | Iowa | 1979 | 46 | 12.5 m | |
| STREAM | Iowa | 1957 | 46 | 6.7 m | |
| CREEK | Iowa | 1900 | 46 | 12.8 m | |
| MUD CREEK | Iowa | 1900 | 46 | 37.2 m | |
| KNACK CREEK | Iowa | 1915 | 46 | 10.7 m | |
| SKILLET CREEK | Iowa | 1919 | 46 | 6.7 m | |
| CEDAR CREEK | Iowa | 1952 | 46 | 25.3 m | |
| GRAND RIVER | Iowa | 1957 | 46 | 63.1 m | |
| STREAM | Iowa | 1988 | 46 | 12.2 m | |
| CHARITON RIVER | Iowa | 1960 | 45 | 92.7 m | |
| DEER CREEK | Iowa | 1925 | 45 | 11.9 m | |
| N SHOAL CREEK | Iowa | 1971 | 45 | 17.7 m | |
| N BRANCH SOAP CREEK | Iowa | 1951 | 45 | 55.8 m | |
| DRAINAGE | Iowa | 1951 | 45 | 13.4 m | |
| MID FK GRAND RIVER | Iowa | 1988 | 45 | 47.2 m | |
| WATERWAY | Iowa | 1955 | 45 | 13.7 m | |
| N ENGLISH RIVER | Iowa | 1955 | 45 | 28.7 m | |
| SUGAR CREEK | Iowa | 1980 | 45 | 9.4 m | |
| DEER CREEK | Iowa | 1977 | 45 | 10.7 m | |
| LOTTS CREEK | Iowa | 1967 | 45 | 26.7 m | |
| SUGAR CREEK | Iowa | 1976 | 45 | 7.3 m | |
| JONES CREEK | Iowa | 1979 | 45 | 15.2 m | |
| DRAINAGE | Iowa | 1950 | 45 | 13.1 m | |
| MIDDLE RIVER | Iowa | 1948 | 45 | 63.4 m | |
| CREEK | Iowa | 1960 | 45 | 12.2 m | |
| MIDDLE RACOON | Iowa | 1958 | 45 | 61.3 m | |
| MASON CREEK | Iowa | 1987 | 45 | 12.2 m | |
| SUGAR CREEK | Iowa | 1933 | 45 | 17.7 m | |
| IOWAY CREEK | Iowa | 1917 | 45 | 19.8 m | |
| STREAM | Iowa | 1949 | 45 | 21.9 m | |
| LITTLE SIOUX RIVER | Iowa | 1960 | 45 | 76.8 m | |
| MONONA HARRISON DD | Iowa | 1959 | 45 | 55.5 m | |
| DRAINAGE | Iowa | 1981 | 45 | 13.1 m | |
| STREAM | Iowa | 1953 | 45 | 10.7 m | |
| SIOUX RIVER | Iowa | 1960 | 45 | 17.4 m | |
| WEST FORK DD | Iowa | 1961 | 45 | 51.5 m | |
| SMALL CREEK | Iowa | 1955 | 45 | 13.1 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.