Local Road over Little Rock River
Lyon County, Iowa · rated Poor in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- Local Road over Little Rock River in Lyon 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 1900, making it 125 years old at the 2025 inventory.
- It carries about 62 vehicles a day (traffic count year 2022).
- Its listed owner is the county highway agency.
- It is one of 70 of the 273 inventoried bridges in Lyon County rated poor (25.6%); 70 (25.6%) 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 3 to 0, superstructure 3 to 0, substructure 3 to 0.
- Status change: newly closed since 2024.
- Its most recent inspection on record is dated July 2024, on a 12-month routine inspection cycle.
- It has fracture-critical members (NBI item 92A): steel tension members without a redundant load path, which get their own scheduled inspections.
- 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 → (43.28634, -96.17814)
Component ratings
| Component | Rating (2024) | Rating (2025) | FHWA scale meaning |
|---|---|---|---|
| Deck | 3 | 0 | Failed condition, out of service |
| Superstructure | 3 | 0 | Failed condition, out of service |
| Substructure | 3 | 0 | Failed condition, out of service |
Bridge details
| Structure | Steel through truss |
| Length | about 120 ft |
| Location | 098452907 |
| NBI structure number | 000000000228630 |
| Condition class | Poor |
| Traffic status (item 41) | Closed to all traffic |
| Last inspection (item 90) | July 2024 |
| Inspection interval (item 91) | 12 months |
| Scour (item 113) | U: unknown foundation, not evaluated for scour |
| Fracture critical (item 92A) | Yes |
Source: FHWA National Bridge Inventory, 2025 data as reported by the Iowa department of transportation.
Busiest bridges in Lyon County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| Ia 9 over Stream | 1980 | 4,840 | Good |
| Ia 9 over Stream | 1940 | 4,520 | Fair |
| Ia 9 over Bloodrun Creek | 1977 | 4,520 | Fair |
| US 75 & Ia 9 over Moon Creek | 1972 | 4,400 | Fair |
| Ia 9 over Rock River | 1974 | 3,920 | Fair |
| Ia 9 over Mud Creek | 1975 | 3,270 | Fair |
All bridges nearby: Lyon County, IA bridge conditions · every bridge in Lyon County · Iowa bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.