Bridge Safety in Iowa
23,716 bridges, 4,423 Poor condition, avg age 45 years.
Bridge Inventory
| Total Bridges | 23,716 |
| Good Condition | 9,329 |
| Fair Condition | 9,964 |
| Poor Condition | 4,423 |
| Oldest Bridge | Built 1876 |
| Average Age | 45 years |
Condition Summary
| % Good | 39.3% |
| % Fair | 42.0% |
| % Poor | 18.6% |
Highest-Traffic Poor Condition Bridges in Iowa
Poor condition bridges sorted by daily traffic, the most urgent safety concerns.
| Bridge | Condition | Year Built | ADT | Length |
|---|---|---|---|---|
| MISS RVR RR & IA 461 | Poor | 1940 | 26,500 | - |
| BNSF RVR STS & IA 376 | Poor | 1936 | 20,600 | - |
| SUGAR CREEK | Poor | 1960 | 18,050 | - |
| OLD UP RR & SW 22ND | Poor | 1936 | 15,634 | - |
| DUCK CREEK | Poor | 1900 | 15,300 | - |
| CHERRY RR MLK PKWY | Poor | 1967 | 14,108 | - |
| RALSTON CREEK | Poor | 1972 | 14,025 | - |
| STREAM | Poor | 1926 | 14,000 | - |
| IOWA 21 | Poor | 1963 | 13,300 | - |
| RACCOON RIVER & TRAIL | Poor | 1967 | 12,809 | - |
| DRY CREEK | Poor | 1915 | 10,953 | - |
| IOWA RIVER | Poor | 1915 | 10,950 | - |
| INDIAN CREEK | Poor | 1988 | 10,789 | - |
| LINN CREEK | Poor | 1951 | 10,448 | - |
| CEDAR RIVER & RR | Poor | 1969 | 10,268 | - |
| GOOSE CREEK | Poor | 1978 | 10,200 | - |
| OVER CC RR | Poor | 1968 | 9,703 | - |
| RR AND MADISON ST | Poor | 1951 | 9,491 | - |
| CEDAR RIVER | Poor | 1938 | 9,382 | - |
| FLOYD RIVER | Poor | 1962 | 8,957 | - |
Oldest Bridges in Iowa
| Bridge | Condition | Year Built | Age | ADT |
|---|---|---|---|---|
| SKUNK RIVER | Poor | 1876 | 150 yrs | 11 |
| BR DES MOINES RIVER | Poor | 1878 | 148 yrs | 21 |
| WAPSIPINICON RIVER | Poor | 1879 | 147 yrs | 140 |
| UPPER IOWA RIVER | Poor | 1880 | 146 yrs | 26 |
| DES MOINES ST | Fair | 1882 | 144 yrs | 565 |
| NORTH RACCOON RIVER | Poor | 1882 | 144 yrs | 153 |
| DD 81 | Fair | 1882 | 144 yrs | 46 |
| SMALL CREEK | Poor | 1886 | 140 yrs | 3,705 |
| TURKEY RIVER | Fair | 1889 | 137 yrs | 4,755 |
| BEAVER CREEK | Poor | 1890 | 136 yrs | 21 |
Bridge Safety in Iowa
Bridge condition data for Iowa comes from the FHWA National Bridge Inventory. All publicly accessible bridges with a span over 20 feet are inspected at least every 24 months by certified bridge inspectors.