Mo 21 S over Darr Valley
Reynolds County, Missouri · rated Fair in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- Mo 21 S over Darr Valley in Reynolds 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 1967, making it 58 years old at the 2025 inventory.
- It carries about 1,959 vehicles a day (traffic count year 2024).
- Its listed owner is the state highway agency.
- It is one of 65 of the 93 inventoried bridges in Reynolds County rated fair (69.9%); 7 (7.5%) 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: superstructure 7 to 6, substructure 7 to 6.
- Its most recent inspection on record is dated November 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 → (37.2422, -90.96377)
Component ratings
| Component | Rating (2024) | Rating (2025) | FHWA scale meaning |
|---|---|---|---|
| Deck | 5 | 5 | Fair condition |
| Superstructure | 7 | 6 | Satisfactory condition |
| Substructure | 7 | 6 | Satisfactory condition |
Bridge details
| Structure | Continuous steel stringer or multi-beam girder |
| Length | about 189 ft |
| Location | S 32 T 30 N R 1 E |
| NBI structure number | 1405 |
| Condition class | Fair |
| Traffic status (item 41) | Open, no restriction |
| Last inspection (item 90) | November 2024 |
| 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 Reynolds County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| Mo 21 S over Sinking CR | 1968 | 1,932 | Fair |
| Mo 21 S over Logan CR | 1967 | 1,759 | Fair |
| Rt Kk S over Toms CR | 1967 | 1,692 | Fair |
| Mo 21 S over Sinking CR | 1968 | 1,393 | Fair |
| Mo 21 S over West Fork Black Rv | 2004 | 1,325 | Fair |
| Mo 21 S over Mid Fk Black Rvr | 1989 | 1,325 | Fair |
All bridges nearby: Reynolds County, MO bridge conditions · every bridge in Reynolds County · Missouri bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.