Rt M S over Is 55
Ste. Genevieve County, Missouri · rated Fair in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- Rt M S over Is 55 in Ste. Genevieve County, Missouri, is rated in fair condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the superstructure, rated 5 (fair condition) on the 0-9 scale.
- It was built in 1969 and reconstructed in 1984, making it 56 years old at the 2025 inventory.
- It carries about 2,490 vehicles a day (traffic count year 2024).
- Its listed owner is the state highway agency.
- It is one of 54 of the 104 inventoried bridges in Ste. Genevieve County rated fair (51.9%); 11 (10.6%) are rated poor.
- Its traffic status in the 2025 inventory is open, no restriction (NBI item 41).
- Its class is unchanged from 2024 (fair), but component ratings moved: deck 7 to 6.
- Its most recent inspection on record is dated October 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 → (37.87518, -90.03376)
Component ratings
| Component | Rating (2024) | Rating (2025) | FHWA scale meaning |
|---|---|---|---|
| Deck | 7 | 6 | Satisfactory condition |
| Superstructure | 5 | 5 | Fair condition |
| Substructure | 6 | 6 | Satisfactory condition |
Bridge details
| Structure | Continuous steel stringer or multi-beam girder |
| Length | about 246 ft |
| Location | S 3060 T 37 N R 9 E |
| NBI structure number | 2089 |
| Condition class | Fair |
| Traffic status (item 41) | Open, no restriction |
| Last inspection (item 90) | October 2024 |
| Inspection interval (item 91) | 24 months |
| Scour (item 113) | N: not over a waterway |
Source: FHWA National Bridge Inventory, 2025 data as reported by the Missouri department of transportation.
Busiest bridges in Ste. Genevieve County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| Is 55 S over Amburster CR | 1970 | 27,080 | Good |
| Is 55 S over Saline CR | 1969 | 23,236 | Fair |
| Is 55 S over Isle Dubois CR | 1970 | 13,572 | Good |
| Is 55 N over Isle Dubois CR | 1970 | 13,508 | Fair |
| Is 55 N over Isle Dubois CR | 1970 | 13,508 | Fair |
| Is 55 S over Fourche CR | 1970 | 13,211 | Fair |
All bridges nearby: Ste. Genevieve County, MO bridge conditions · every bridge in Ste. Genevieve County · Missouri bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.