Randolph Rd over Thornton Mill CR
Clay County, Missouri · rated Fair in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- Randolph Rd over Thornton Mill CR in Clay 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 2001, making it 24 years old at the 2025 inventory.
- It carries about 2,400 vehicles a day (traffic count year 2024).
- Its listed owner is a city or municipal highway agency.
- It is one of 256 of the 444 inventoried bridges in Clay County rated fair (57.7%); 32 (7.2%) 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 8 to 6.
- Its most recent inspection on record is dated December 2023, 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 → (39.20002, -94.49336)
Component ratings
| Component | Rating (2024) | Rating (2025) | FHWA scale meaning |
|---|---|---|---|
| Deck | 8 | 6 | Satisfactory condition |
| Superstructure | 7 | 7 | Good condition |
| Substructure | 6 | 6 | Satisfactory condition |
Bridge details
| Structure | Steel stringer or multi-beam girder |
| Length | about 81 ft |
| Location | S 28 T 51 N R 32 W |
| NBI structure number | 29198 |
| Condition class | Fair |
| Traffic status (item 41) | Open, no restriction |
| Last inspection (item 90) | December 2023 |
| Inspection interval (item 91) | 24 months |
| Scour (item 113) | 8: foundations stable, scour above the top of the footing |
Source: FHWA National Bridge Inventory, 2025 data as reported by the Missouri department of transportation.
Busiest bridges in Clay County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| Is 29 S over Cst Levee Rd Missouri | 2010 | 108,151 | Fair |
| Is 29 S over Cst 14TH Ave BNSF RR | 1953 | 108,151 | Fair |
| Is 435 S over Drain Dtch | 1967 | 81,653 | Fair |
| Is 435 S over Cst N Levee Rd Missou | 1972 | 81,653 | Fair |
| Is 435 S over Mill CR | 1969 | 76,557 | Fair |
| Is 35 S over Lit Shoal CR | 1953 | 66,486 | Fair |
All bridges nearby: Clay County, MO bridge conditions · every bridge in Clay County · Missouri bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.