Tr 84A over So Br Lt Missouri
Brown County, Illinois · rated Poor in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- Tr 84A over So Br Lt Missouri in Brown County, Illinois, 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 1900, making it 125 years old at the 2025 inventory.
- It carries about 75 vehicles a day (traffic count year 2023).
- Its listed owner is a town or township highway agency.
- It is one of 10 of the 71 inventoried bridges in Brown County rated poor (14.1%); 10 (14.1%) 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 → (40.05051, -90.80717)
Component ratings
| Component | Rating (2025) | FHWA scale meaning |
|---|---|---|
| Deck | 4 | Poor condition |
| Superstructure | 5 | Fair condition |
| Substructure | 7 | Good condition |
Bridge details
| Structure | Steel through truss |
| Length | about 82 ft |
| Location | 4.5 Mi NW Mt Sterlin |
| NBI structure number | 005371400000000 |
| Condition class | Poor |
Source: FHWA National Bridge Inventory, 2025 data as reported by the Illinois department of transportation.
Busiest bridges in Brown County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| US 24 over Lamoine River | 2011 | 3,050 | Fair |
| Il 107 over Mckee Creek | 1950 | 1,400 | Good |
| Il 99 over N Fork Shelby Creek | 1931 | 750 | Fair |
| Il 99 over Missouri Creek | 1931 | 500 | Fair |
| Ch 6 over Purpus Creek | 1905 | 475 | Fair |
| Ch 6 over Wells Fork | 1949 | 450 | Fair |
All bridges nearby: Brown County, IL bridge conditions · every bridge in Brown County · Illinois bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.