County Rd 600 over Highland CR
Perry County, Missouri · rated Fair in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- County Rd 600 over Highland 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 5 (fair condition) on the 0-9 scale.
- It was built in 1940, making it 85 years old at the 2025 inventory.
- It carries about 15 vehicles a day (traffic count year 2023).
- Its listed owner is the county 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.
- 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 → (37.68299, -89.8802)
Component ratings
| Component | Rating (2025) | FHWA scale meaning |
|---|---|---|
| Deck | 5 | Fair condition |
| Superstructure | 5 | Fair condition |
| Substructure | 5 | Fair condition |
Bridge details
| Structure | Steel girder and floorbeam |
| Length | about 37 ft |
| Location | S 1 T 34 N R 10 E |
| NBI structure number | 20403 |
| Condition class | Fair |
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 S over Saline CR | 1970 | 9,523 | Fair |
| 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 |
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.