NW Polk Rd over Trib Third Fk Plat
DeKalb County, Missouri · rated Poor in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- NW Polk Rd over Trib Third Fk Plat in DeKalb 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 1983, making it 42 years old at the 2025 inventory.
- It carries about 35 vehicles a day (traffic count year 2024).
- Its listed owner is the county highway agency.
- It is one of 16 of the 238 inventoried bridges in DeKalb County rated poor (6.7%); 16 (6.7%) 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 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 → (39.981, -94.58451)
Component ratings
| Component | Rating (2024) | Rating (2025) | FHWA scale meaning |
|---|---|---|---|
| Deck | 7 | 7 | Good condition |
| Superstructure | 6 | 6 | Satisfactory condition |
| Substructure | 4 | 4 | Poor condition |
Bridge details
| Structure | Steel stringer or multi-beam girder |
| Length | about 21 ft |
| Location | S 26 T 60 N R 33 W |
| NBI structure number | 12685 |
| 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) | 4: foundations stable, field review says exposed foundations need protection |
Source: FHWA National Bridge Inventory, 2025 data as reported by the Missouri department of transportation.
Busiest bridges in DeKalb County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| Is 35 S over Brushy CR | 1964 | 19,244 | Fair |
| US 36 E over Freeman Br | 1962 | 11,148 | Fair |
| US 36 E over Jordon CR | 1962 | 11,148 | Fair |
| US 69 S over US 36 | 1990 | 9,126 | Fair |
| US 36 W over Is 35 | 1963 | 7,793 | Good |
| US 36 E over Is 35 | 1963 | 6,359 | Good |
All bridges nearby: DeKalb County, MO bridge conditions · every bridge in DeKalb County · Missouri bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.