Ia 3 over over Ianr RR
Butler County, Iowa · rated Fair in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- Ia 3 over over Ianr RR in Butler County, Iowa, is rated in fair condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the deck, rated 5 (fair condition) on the 0-9 scale.
- It was built in 1967, making it 58 years old at the 2025 inventory.
- It carries about 3,540 vehicles a day (traffic count year 2022).
- Its listed owner is the state highway agency.
- It is one of 77 of the 287 inventoried bridges in Butler County rated fair (26.8%); 35 (12.2%) are rated poor.
- Its traffic status in the 2025 inventory is open, no restriction (NBI item 41).
- Its condition class and component ratings are unchanged from the 2024 inventory.
- Its most recent inspection on record is dated September 2024, on a 24-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 → (42.74477, -92.62894)
Component ratings
| Component | Rating (2024) | Rating (2025) | FHWA scale meaning |
|---|---|---|---|
| Deck | 5 | 5 | Fair condition |
| Superstructure | 6 | 6 | Satisfactory condition |
| Substructure | 7 | 7 | Good condition |
Bridge details
| Structure | Continuous steel stringer or multi-beam girder |
| Length | about 200 ft |
| Location | 1.7 Miles E of Jct Ia 188 |
| NBI structure number | 000000000016550 |
| Condition class | Fair |
| Traffic status (item 41) | Open, no restriction |
| Last inspection (item 90) | September 2024 |
| Inspection interval (item 91) | 24 months |
| Scour (item 113) | N: not over a waterway |
Source: FHWA National Bridge Inventory, 2025 data as reported by the Iowa department of transportation.
Busiest bridges in Butler County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| Ia 3 over Shell Rock River | 1967 | 3,540 | Fair |
| Cherry St over Shell Rock River | 1915 | 3,435 | Fair |
| Ia 57 over Drainage Ditch | 1924 | 2,480 | Fair |
| Ia 57 over Beaver Creek | 2003 | 2,480 | Good |
| Ia 57 over Phelps Creek | 2017 | 2,400 | Good |
| Ia 57 over Drainage Ditch | 2023 | 2,400 | Good |
All bridges nearby: Butler County, IA bridge conditions · every bridge in Butler County · Iowa bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.