590TH St over Maple River
Cherokee County, Iowa · rated Poor in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- 590TH St over Maple River in Cherokee County, Iowa, is rated in poor condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the deck, rated 0 (failed condition, out of service) on the 0-9 scale.
- It was built in 1919, making it 106 years old at the 2025 inventory.
- It carries about 30 vehicles a day (traffic count year 2022).
- Its listed owner is the county highway agency.
- It is one of 68 of the 244 inventoried bridges in Cherokee County rated poor (27.9%); 68 (27.9%) are rated poor.
- Its traffic status in the 2025 inventory is closed to all traffic (NBI item 41).
- Its class is unchanged from 2024 (poor), but component ratings moved: deck 4 to 0, superstructure 4 to 0, substructure 3 to 0.
- Status change: newly closed since 2024.
- Its most recent inspection on record is dated January 2025, on a 24-month routine inspection cycle.
- A poor rating means at least one major component - deck, superstructure, or substructure - is rated 4 or lower on FHWA's 0-9 scale. It does not by itself mean the bridge is unsafe; bridges judged unsafe are closed or load-restricted by their owners.
View this bridge on a map → (42.66248, -95.47514)
Component ratings
| Component | Rating (2024) | Rating (2025) | FHWA scale meaning |
|---|---|---|---|
| Deck | 4 | 0 | Failed condition, out of service |
| Superstructure | 4 | 0 | Failed condition, out of service |
| Substructure | 3 | 0 | Failed condition, out of service |
Bridge details
| Structure | Steel through truss |
| Length | about 67 ft |
| Location | 091393201 |
| NBI structure number | 000000000107970 |
| Condition class | Poor |
| Traffic status (item 41) | Closed to all traffic |
| Last inspection (item 90) | January 2025 |
| Inspection interval (item 91) | 24 months |
| Scour (item 113) | 8: foundations stable, scour above the top of the footing |
Source: FHWA National Bridge Inventory, 2025 data as reported by the Iowa department of transportation.
Busiest bridges in Cherokee County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| US 59 over Railroad Creek | 1973 | 7,200 | Fair |
| US 59 over Westcott Pk Loop | 1972 | 4,510 | Fair |
| US 59 over Little Sioux River | 1973 | 4,510 | Fair |
| W Bluff St over Railroad Creek | 1961 | 3,529 | Poor |
| Ia 3 over Fork Little Sioux River | 1979 | 3,410 | Fair |
| Ia 3 over Maple River | 1985 | 3,270 | Fair |
All bridges nearby: Cherokee County, IA bridge conditions · every bridge in Cherokee County · Iowa bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.