Local over Ioway Creek
Boone County, Iowa · rated Fair in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- Local over Ioway Creek in Boone County, Iowa, is rated in fair condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the deck, rated 6 (satisfactory condition) on the 0-9 scale.
- It was built in 1988, making it 37 years old at the 2025 inventory.
- It carries about 20 vehicles a day (traffic count year 2022).
- Its listed owner is the county highway agency.
- It is one of 58 of the 134 inventoried bridges in Boone County rated fair (43.3%); 38 (28.4%) are rated poor.
- Its traffic status in the 2025 inventory is open, no restriction (NBI item 41).
- Its class is unchanged from 2024 (fair), but component ratings moved: substructure 8 to 7.
- Its most recent inspection on record is dated May 2024, on a 48-month routine inspection cycle.
- A fair rating means the lowest-rated major component scores 5 or 6 on FHWA's 0-9 scale: some deterioration or minor section loss, but the structure is sound. It is the middle class, not a warning.
View this bridge on a map → (42.20948, -93.78676)
Component ratings
| Component | Rating (2024) | Rating (2025) | FHWA scale meaning |
|---|---|---|---|
| Deck | 6 | 6 | Satisfactory condition |
| Superstructure | 6 | 6 | Satisfactory condition |
| Substructure | 8 | 7 | Good condition |
Bridge details
| Structure | Continuous concrete slab |
| Length | about 125 ft |
| Location | 085250501 |
| NBI structure number | 000000000078131 |
| Condition class | Fair |
| Traffic status (item 41) | Open, no restriction |
| Last inspection (item 90) | May 2024 |
| Inspection interval (item 91) | 48 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 Boone County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| US 30 over Noah Creek | 1962 | 8,800 | Fair |
| US 30 over Honey Creek | 1962 | 8,800 | Fair |
| US 30 & 169 over East Beaver Creek | 1962 | 5,900 | Good |
| Ia 17 over Big Creek | 1961 | 5,300 | Fair |
| Ia 17 over US 30 | 1968 | 4,960 | Fair |
| US 30 EB over Des Moines River | 1963 | 4,400 | Fair |
All bridges nearby: Boone County, IA bridge conditions · every bridge in Boone County · Iowa bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.