Co Rd SE 601 over Fk Blackwater Rvr
Johnson County, Missouri · rated Poor in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- Co Rd SE 601 over Fk Blackwater Rvr in Johnson County, Missouri, is rated in poor condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the substructure, rated 4 (poor condition) on the 0-9 scale.
- It was built in 1992, making it 33 years old at the 2025 inventory.
- It carries about 45 vehicles a day (traffic count year 2023).
- Its listed owner is the county highway agency.
- It is one of 33 of the 475 inventoried bridges in Johnson County rated poor (6.9%); 33 (6.9%) are rated poor.
- Its traffic status in the 2025 inventory is open, no restriction (NBI item 41).
- It was rated fair in the 2024 inventory and is now poor (substructure 6 to 4).
- Its most recent inspection on record is dated December 2024, on a 24-month routine inspection cycle.
- A poor rating means at least one major component - deck, superstructure, or substructure - is rated 4 or lower on FHWA's 0-9 scale. It does not by itself mean the bridge is unsafe; bridges judged unsafe are closed or load-restricted by their owners.
View this bridge on a map → (38.71706, -93.63022)
Component ratings
| Component | Rating (2024) | Rating (2025) | FHWA scale meaning |
|---|---|---|---|
| Deck | 7 | 7 | Good condition |
| Superstructure | 6 | 6 | Satisfactory condition |
| Substructure | 6 | 4 | Poor condition |
Bridge details
| Structure | Steel stringer or multi-beam girder |
| Length | about 80 ft |
| Location | S 1 T 45 N R 25 W |
| NBI structure number | 23801 |
| Condition class | Poor |
| Traffic status (item 41) | Open, no restriction |
| Last inspection (item 90) | December 2024 |
| Inspection interval (item 91) | 24 months |
| Scour (item 113) | 5: foundations stable, scour within the limits of the footing or piles |
Source: FHWA National Bridge Inventory, 2025 data as reported by the Missouri department of transportation.
Busiest bridges in Johnson County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| US 50 E over Mayes Br | 1968 | 18,503 | Fair |
| US 50 E over Trib Blackwater Rv | 1924 | 17,553 | Fair |
| Bu 13 S over US 50 | 1959 | 17,494 | Fair |
| US 50 W over Post Oak CR | 1967 | 14,542 | Fair |
| Bu 13 S over UP RR | 1963 | 14,241 | Fair |
| US 50 W over Devils Br | 1967 | 10,624 | Fair |
All bridges nearby: Johnson County, MO bridge conditions · every bridge in Johnson County · Missouri bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.