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 |
|---|---|---|---|---|---|
| MUDDY CREEK | Iowa | 1967 | 628 | 7.9 m | |
| STEPHENS CREEK | Iowa | 1960 | 628 | 31.1 m | |
| SMALL STREAM | Iowa | 1967 | 627 | 23.8 m | |
| CEDAR RIVER | Iowa | 1948 | 620 | 349.0 m | |
| RICHLAND CREEK | Iowa | 1932 | 620 | 55.8 m | |
| SMALL STREAM | Iowa | 1932 | 620 | 9.1 m | |
| LINDNER CREEK | Iowa | 1972 | 620 | 10.8 m | |
| BRANCH BEAVER CREEK | Iowa | 1968 | 619 | 9.8 m | |
| IOWA RIVER | Iowa | 1988 | 619 | 184.1 m | |
| DRAINAGE | Iowa | 1960 | 616 | 18.9 m | |
| ZADIE CREEK | Iowa | 1925 | 610 | 10.7 m | |
| TURKEY RIVER | Iowa | 1953 | 609 | 104.5 m | |
| DRAINAGE | Iowa | 1976 | 609 | 13.4 m | |
| UNNAMED CREEK | Iowa | 1961 | 598 | 23.8 m | |
| JIM CREEK | Iowa | 1972 | 597 | 38.1 m | |
| DD | Iowa | 1959 | 597 | 55.5 m | |
| DRAINAGE | Iowa | 1949 | 597 | 46.3 m | |
| HOWERDON CREEK | Iowa | 1972 | 597 | 21.3 m | |
| TOM CREEK | Iowa | 1962 | 597 | 9.8 m | |
| DIVERSION DITCH | Iowa | 1962 | 597 | 82.6 m | |
| CRANE CREEK | Iowa | 1968 | 590 | 46.6 m | |
| BEAR CR | Iowa | 1930 | 589 | 6.7 m | |
| HONEY CREEK | Iowa | 1973 | 589 | 45.7 m | |
| SILVER CREEK | Iowa | 1969 | 589 | 31.4 m | |
| ODEBOLT CREEK | Iowa | 1964 | 589 | 31.4 m | |
| WILLOW CREEK | Iowa | 1964 | 580 | 23.5 m | |
| CRANE CREEK | Iowa | 1968 | 579 | 9.8 m | |
| BLACKHAWK CREEK | Iowa | 1967 | 579 | 54.3 m | |
| BRANCH IOWA RIVER | Iowa | 1969 | 579 | 10.1 m | |
| LITTLE CEDAR | Iowa | 1964 | 579 | 55.8 m | |
| NO LIZARD CK DD #171 | Iowa | 1965 | 578 | 21.0 m | |
| OVER CC RR | Iowa | 1932 | 578 | 47.9 m | |
| FAMERS GARRETSON DITCH | Iowa | 1962 | 578 | 66.8 m | |
| MULE SLOUGH | Iowa | 2008 | 577 | 7.6 m | |
| MIDDLE RACOON RIVER | Iowa | 1951 | 574 | 102.7 m | |
| HINKLE CREEK | Iowa | 1962 | 570 | 6.4 m | |
| DRAINAGE | Iowa | 1976 | 569 | 31.4 m | |
| WEST IOWA RIVER | Iowa | 1979 | 569 | 34.7 m | |
| LITTLE MAPLE RIVER | Iowa | 1974 | 569 | 10.4 m | |
| SM STREAM | Iowa | 1974 | 569 | 10.4 m | |
| DD NO 4 | Iowa | 1974 | 559 | 23.8 m | |
| MILL CREEK | Iowa | 1958 | 550 | 44.5 m | |
| WAPSIPINICON RIVER | Iowa | 1956 | 550 | 38.7 m | |
| MILL CREEK | Iowa | 1956 | 550 | 17.4 m | |
| PRAIRIE CREEK | Iowa | 1967 | 550 | 39.0 m | |
| MINERVA CREEK | Iowa | 1972 | 550 | 13.4 m | |
| WEST FORK LITTLE SIOUX | Iowa | 1955 | 549 | 65.2 m | |
| LIZARD CREEK | Iowa | 1965 | 549 | 61.0 m | |
| CREEK | Iowa | 1955 | 549 | 7.3 m | |
| LIZARD CREEK | Iowa | 1965 | 549 | 61.0 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.