315 St over Creek
Audubon County, Iowa · rated Good in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- 315 St over Creek in Audubon County, Iowa, is rated in good condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the deck, rated 7 (good condition) on the 0-9 scale.
- It was built in 2000, making it 25 years old at the 2025 inventory.
- It carries about 30 vehicles a day (traffic count year 2022).
- Its listed owner is the county highway agency.
- It is one of 71 of the 204 inventoried bridges in Audubon County rated good (34.8%); 37 (18.1%) 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 → (41.55546, -94.98797)
Component ratings
| Component | Rating (2025) | FHWA scale meaning |
|---|---|---|
| Deck | 7 | Good condition |
| Superstructure | 7 | Good condition |
| Substructure | 7 | Good condition |
Bridge details
| Structure | Steel stringer or multi-beam girder |
| Length | about 40 ft |
| Location | 078361605 |
| NBI structure number | 000000000067011 |
| Condition class | Good |
Source: FHWA National Bridge Inventory, 2025 data as reported by the Iowa department of transportation.
Busiest bridges in Audubon County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| US 71 over Stream | 1983 | 3,700 | Good |
| US 71 over Bluegrass Creek | 2006 | 3,080 | Good |
| US 71 over East Nishnabotna River | 1959 | 2,470 | Fair |
| US 71 over Stream | 1923 | 2,380 | Fair |
| US 71 over Stream | 1961 | 2,380 | Fair |
| US 71 over Stream | 1961 | 2,380 | Fair |
All bridges nearby: Audubon County, IA bridge conditions · every bridge in Audubon County · Iowa bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.