US 218 over Slough Creek
Floyd County, Iowa · rated Fair in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- US 218 over Slough Creek in Floyd County, Iowa, is rated in fair condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the substructure, rated 6 (satisfactory condition) on the 0-9 scale.
- It was built in 1965, making it 60 years old at the 2025 inventory.
- It carries about 2,040 vehicles a day (traffic count year 2022).
- Its listed owner is the state highway agency.
- It is one of 76 of the 214 inventoried bridges in Floyd County rated fair (35.5%); 30 (14.0%) 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 June 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 → (43.20627, -92.73235)
Component ratings
| Component | Rating (2024) | Rating (2025) | FHWA scale meaning |
|---|---|---|---|
| Deck | 7 | 7 | Good condition |
| Superstructure | 7 | 7 | Good condition |
| Substructure | 6 | 6 | Satisfactory condition |
Bridge details
| Structure | Concrete slab |
| Length | about 27 ft |
| Location | 1.4 mi. S of SR B17 |
| NBI structure number | 000000000025020 |
| Condition class | Fair |
| Traffic status (item 41) | Open, no restriction |
| Last inspection (item 90) | June 2024 |
| Inspection interval (item 91) | 24 months |
| Scour (item 113) | 7: scour countermeasures installed |
Source: FHWA National Bridge Inventory, 2025 data as reported by the Iowa department of transportation.
Busiest bridges in Floyd County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| US 18 over Stewart Creek | 1998 | 11,200 | Good |
| US 18 & 218 over Stewart Creek | 1998 | 10,900 | Good |
| US 18 over Drainage Ditch | 1998 | 10,700 | Good |
| US 18 over Cedar River | 1967 | 10,500 | Fair |
| US 218 over Stream | 2001 | 10,200 | Fair |
| US 218 over Bloody Run | 1999 | 10,000 | Good |
All bridges nearby: Floyd County, IA bridge conditions · every bridge in Floyd County · Iowa bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.