Main St over Willow Creek
Carroll County, Iowa · rated Good in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- Main St over Willow Creek in Carroll County, Iowa, is rated in good condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the deck, rated 8 (very good condition) on the 0-9 scale.
- It was built in 2016, making it 9 years old at the 2025 inventory.
- It carries about 566 vehicles a day (traffic count year 2022).
- Its listed owner is a city or municipal highway agency.
- It is one of 120 of the 249 inventoried bridges in Carroll County rated good (48.2%); 17 (6.8%) are rated poor.
- A good rating means every major component - deck, superstructure, substructure, or culvert - is rated 7 or higher on FHWA's 0-9 scale: no more than minor problems.
View this bridge on a map → (41.90407, -95.06512)
Component ratings
| Component | Rating (2025) | FHWA scale meaning |
|---|---|---|
| Deck | 8 | Very good condition |
| Superstructure | 8 | Very good condition |
| Substructure | 8 | Very good condition |
Bridge details
| Structure | Continuous concrete slab |
| Length | about 80 ft |
| Location | 900 S. of 6TH St on Main |
| NBI structure number | 000000000007611 |
| Condition class | Good |
Source: FHWA National Bridge Inventory, 2025 data as reported by the Iowa department of transportation.
Busiest bridges in Carroll County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| US 30 over Ditch #77 | 1919 | 13,000 | Fair |
| US 30 over Storm Creek | 1955 | 7,300 | Fair |
| US 30 over over UP RR | 1982 | 6,800 | Fair |
| US 30 over Middle Raccoon River | 1982 | 6,000 | Fair |
| US 71 over UP RR & Rd | 1988 | 5,600 | Fair |
| US 71 over Stream | 2000 | 5,600 | Good |
All bridges nearby: Carroll County, IA bridge conditions · every bridge in Carroll County · Iowa bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.