Is 64 W over Is 70
St. Charles County, Missouri · rated Poor in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- Is 64 W over Is 70 in St. Charles County, Missouri, is rated in poor condition in the 2025 National Bridge Inventory (as of ).
- It was built in 1971 and reconstructed in 2005, making it 54 years old at the 2025 inventory.
- It carries about 35,428 vehicles a day (traffic count year 2024).
- Its listed owner is the state highway agency.
- 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 → (38.80649, -90.83596)
Component ratings
| Component | Rating (2025) | FHWA scale meaning |
|---|---|---|
| Deck | 5 | Fair condition |
| Superstructure | 4 | Poor condition |
| Substructure | 6 | Satisfactory condition |
Bridge details
| Structure | Continuous steel stringer or multi-beam girder |
| Length | about 307 ft |
| Location | S 30 T 47 N R 2 E |
| NBI structure number | 6271 |
Source: FHWA National Bridge Inventory, 2025 data as reported by the Missouri department of transportation.
All bridges nearby: St. Charles County, MO bridge conditions · Missouri bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.