Mo 139 S over Grand Rvr
Chariton County, Missouri · rated Fair in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- Mo 139 S over Grand Rvr in Chariton 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 1963, making it 62 years old at the 2025 inventory.
- It carries about 400 vehicles a day (traffic count year 2024).
- Its listed owner is the state highway agency.
- It is one of 99 of the 288 inventoried bridges in Chariton County rated fair (34.4%); 26 (9.0%) 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 May 2023, on a 24-month routine inspection cycle.
- It has fracture-critical members (NBI item 92A): steel tension members without a redundant load path, which get their own scheduled inspections.
- 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 → (39.63943, -93.27304)
Component ratings
| Component | Rating (2024) | Rating (2025) | FHWA scale meaning |
|---|---|---|---|
| Deck | 5 | 5 | Fair condition |
| Superstructure | 6 | 6 | Satisfactory condition |
| Substructure | 6 | 6 | Satisfactory condition |
Bridge details
| Structure | Continuous steel girder and floorbeam |
| Length | about 588 ft |
| Location | S 28 T 56 N R 21 W |
| NBI structure number | 8339 |
| Condition class | Fair |
| Traffic status (item 41) | Open, no restriction |
| Last inspection (item 90) | May 2023 |
| Inspection interval (item 91) | 24 months |
| Scour (item 113) | 8: foundations stable, scour above the top of the footing |
| Fracture critical (item 92A) | Yes |
Source: FHWA National Bridge Inventory, 2025 data as reported by the Missouri department of transportation.
Busiest bridges in Chariton County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| Mo 129 S over BNSF RR | 2004 | 3,602 | Good |
| US 24 E over Mid Fk Chariton Rv | 2019 | 3,513 | Good |
| US 24 E over Mid Fk Chariton Rv | 2019 | 3,513 | Good |
| US 24 E over Long CR | 1978 | 2,794 | Fair |
| US 24 E over Chariton Rvr | 1978 | 2,794 | Fair |
| US 24 E over Mussel Fk Rvr | 2019 | 1,685 | Good |
All bridges nearby: Chariton County, MO bridge conditions · every bridge in Chariton County · Missouri bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.