FM over Stony Creek
Dickinson County, Iowa · rated Poor in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- FM over Stony Creek in Dickinson 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 1990, making it 35 years old at the 2025 inventory.
- It carries about 315 vehicles a day (traffic count year 2021).
- Its listed owner is the county highway agency.
- It is one of 13 of the 83 inventoried bridges in Dickinson County rated poor (15.7%); 13 (15.7%) are rated poor.
- Its traffic status in the 2025 inventory is closed to all traffic (NBI item 41).
- It was rated fair in the 2024 inventory and is now poor (deck 6 to 0, superstructure 6 to 0, substructure 7 to 0).
- Status change: newly closed since 2024.
- Its most recent inspection on record is dated April 2023, on a 48-month routine inspection cycle.
- 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 → (43.26954, -95.31259)
Component ratings
| Component | Rating (2024) | Rating (2025) | FHWA scale meaning |
|---|---|---|---|
| Deck | 6 | 0 | Failed condition, out of service |
| Superstructure | 6 | 0 | Failed condition, out of service |
| Substructure | 7 | 0 | Failed condition, out of service |
Bridge details
| Structure | Continuous concrete slab |
| Length | about 103 ft |
| Location | 098383401 |
| NBI structure number | 000000000145031 |
| Condition class | Poor |
| Traffic status (item 41) | Closed to all traffic |
| Last inspection (item 90) | April 2023 |
| 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 Dickinson County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| US 71 over E to W Okoboji Lkes Conn | 1999 | 14,600 | Good |
| Ia 9 over Inlet W Okoboji Lake | 1971 | 8,500 | Fair |
| US 71 & Ia 9 over East Okoboji Lake | 1939 | 8,200 | Fair |
| US 71 & Ia 9 over Dry Run Creek | 1978 | 5,400 | Good |
| Ia 9 over W Fork Little Sioux Rvr | 1929 | 4,310 | Poor |
| Ia 9 over Little Sioux River | 1971 | 4,310 | Good |
All bridges nearby: Dickinson County, IA bridge conditions · every bridge in Dickinson County · Iowa bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.