305TH Rd over Trib N Blackbird C
Putnam County, Missouri · rated Poor in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- 305TH Rd over Trib N Blackbird C in Putnam County, Missouri, is rated in poor condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the deck, rated 4 (poor condition) on the 0-9 scale.
- It was built in 1915, making it 110 years old at the 2025 inventory.
- It carries about 5 vehicles a day (traffic count year 2024).
- Its listed owner is the county highway agency.
- It is one of 32 of the 214 inventoried bridges in Putnam County rated poor (15.0%); 32 (15.0%) are rated poor.
- 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 → (40.56562, -92.98718)
Component ratings
| Component | Rating (2025) | FHWA scale meaning |
|---|---|---|
| Deck | 4 | Poor condition |
| Superstructure | 5 | Fair condition |
| Substructure | 4 | Poor condition |
Bridge details
| Structure | Steel through truss |
| Length | about 40 ft |
| Location | S 36 T 67 N R 19 W |
| NBI structure number | 16795 |
| Condition class | Poor |
Source: FHWA National Bridge Inventory, 2025 data as reported by the Missouri department of transportation.
Busiest bridges in Putnam County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| Mo 5 S over Blackbird CR | 2010 | 1,494 | Good |
| US 136 W over E Locust CR | 2010 | 1,492 | Good |
| US 136 E over Tanyard Br | 1931 | 1,492 | Fair |
| US 136 E over Barber CR | 2002 | 1,247 | Fair |
| US 136 E over Old Chariton Rvr | 2008 | 1,183 | Fair |
| US 136 E over Shoal CR | 1966 | 1,146 | Good |
All bridges nearby: Putnam County, MO bridge conditions · every bridge in Putnam County · Missouri bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.