Is 55 S over Saline CR
Perry County, Missouri · rated Fair in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- Is 55 S over Saline CR in Perry County, Missouri, is rated in fair condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the deck, rated 6 (satisfactory condition) on the 0-9 scale.
- It was built in 1970 and reconstructed in 1984, making it 55 years old at the 2025 inventory.
- It carries about 9,523 vehicles a day (traffic count year 2024).
- Its listed owner is the state highway agency.
- It is one of 66 of the 122 inventoried bridges in Perry County rated fair (54.1%); 21 (17.2%) are rated poor.
- Its traffic status in the 2025 inventory is open, no restriction (NBI item 41).
- Its condition class and component ratings are unchanged from the 2024 inventory.
- Its most recent inspection on record is dated November 2024, on a 12-month routine inspection cycle.
- It is coded scour critical (NBI item 113 = 3): scour critical: foundations unstable for the assessed or calculated scour.
- 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 → (37.83184, -89.98337)
Component ratings
| Component | Rating (2024) | Rating (2025) | FHWA scale meaning |
|---|---|---|---|
| Deck | 6 | 6 | Satisfactory condition |
| Superstructure | 7 | 7 | Good condition |
| Substructure | 7 | 7 | Good condition |
Bridge details
| Structure | Continuous steel stringer or multi-beam girder |
| Length | about 324 ft |
| Location | S 3015 T 36 N R 9 E |
| NBI structure number | 2119 |
| Condition class | Fair |
| Traffic status (item 41) | Open, no restriction |
| Last inspection (item 90) | November 2024 |
| Inspection interval (item 91) | 12 months |
| Scour (item 113) | 3: scour critical: foundations unstable for the assessed or calculated scour |
Source: FHWA National Bridge Inventory, 2025 data as reported by the Missouri department of transportation.
Busiest bridges in Perry County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| Is 55 S over Apple CR | 1970 | 11,280 | Good |
| Mo 51 S over Is 55 | 1970 | 10,761 | Poor |
| Is 55 N over Saline CR | 1970 | 9,485 | Fair |
| Is 55 N over Tyler Br | 1971 | 9,389 | Fair |
| Is 55 S over Tyler Br | 1971 | 9,274 | Good |
| Is 55 N over Apple CR | 1970 | 9,106 | Good |
All bridges nearby: Perry County, MO bridge conditions · every bridge in Perry County · Missouri bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.