Bridge conditions in Worth County, Iowa
116 inventoried bridges · 17 rated poor · 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
Of the 116 Worth County bridges in the federal inventory, 17 carry a poor rating. That 14.7% share is roughly 2x the national average.
- 17 of the 116 bridges in Worth County, Iowa, are rated in poor condition (14.7%) in the 2025 National Bridge Inventory, as of .
- 44 bridges (37.9%) are rated good and 55 (47.4%) fair.
- The median Worth County bridge was built in 1971.
- The busiest poor-rated bridge is Central Ave N over Shellrock River (built 1950), carrying about 1,868 vehicles a day.
Good 37.9% · Fair 47.4% · Poor 14.7% of 116 bridges
Bridges rated poor
Every bridge in the county with a poor rating, busiest first. Poor means a major component is rated 4 or lower on FHWA's 0-9 scale; it is a repair flag, not a closure notice.
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| Central Ave N over Shellrock River | 1950 | 1,868 | Poor |
| 390TH over Shellrock River | 1958 | 363 | Poor |
| Dogwood over Stream | 1959 | 236 | Poor |
| Dogwood over Drainage Ditch | 1972 | 236 | Poor |
| Balsam over Beaver Creek | 1977 | 216 | Poor |
| Mallard Ave over Drainage Ditch | 1973 | 216 | Poor |
| Killdeer over Elk Creek | 2001 | 137 | Poor |
| Vine over Deer Creek | 1977 | 59 | Poor |
| Olive over Drainage Ditch | 1974 | 51 | Poor |
| 390TH over Stream | 1959 | 41 | Poor |
| 450TH over Stream | 1962 | 34 | Poor |
| 380TH over Stream | 1964 | 33 | Poor |
| Spruce over Drainage Ditch | 1955 | 30 | Poor |
| 440TH over Drainage Ditch | 1962 | 26 | Poor |
| Jonquil over Elk Creek | 1957 | 21 | Poor |
| 380TH over Drainage Ditch | 1959 | 20 | Poor |
| 355TH over Stream | 1900 | 11 | Poor |
Busiest bridges in the county
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| I-35 over Drainage Ditch | 1972 | 20,600 | Good |
| I-35 over Goose Creek | 1972 | 20,100 | Fair |
| NB I 35 over over UP RR | 1970 | 10,700 | Fair |
| SB I 35 over over UP RR | 1970 | 10,500 | Fair |
| NB I-35 over Elk Creek | 1972 | 9,950 | Fair |
| SB I-35 over Elk Creek | 1972 | 9,750 | Fair |
| SR 105 over I-35 | 1972 | 4,419 | Fair |
| Ia 9 over Beaver Creek | 2024 | 2,360 | Good |
| Ia 9 over Stream | 1921 | 2,360 | Fair |
| US 65 over Drainage Ditch | 1928 | 2,200 | Fair |
Source: FHWA National Bridge Inventory, 2025. Counts cover inventoried highway bridges over 20 feet; ratings are reported by the state DOT.
All of Iowa: Iowa bridge conditions by county · every download on the data page.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.