Tr-364 over Trib Seven Mile Ck
Jefferson County, Illinois · rated Fair in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- Tr-364 over Trib Seven Mile Ck in Jefferson County, Illinois, 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 1909 and reconstructed in 1960, making it 116 years old at the 2025 inventory.
- It carries about 700 vehicles a day (traffic count year 2021).
- Its listed owner is a town or township highway agency.
- It is one of 124 of the 259 inventoried bridges in Jefferson County rated fair (47.9%); 21 (8.1%) are rated poor.
- Its traffic status in the 2025 inventory is posted for load (NBI item 41).
- It was rated good in the 2024 inventory and is now fair (deck 7 to 5, superstructure 7 to 5, substructure 7 to 6).
- Its most recent inspection on record is dated February 2024, on a 24-month routine inspection cycle.
- 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 → (38.27754, -88.86909)
Component ratings
| Component | Rating (2024) | Rating (2025) | FHWA scale meaning |
|---|---|---|---|
| Deck | 7 | 5 | Fair condition |
| Superstructure | 7 | 5 | Fair condition |
| Substructure | 7 | 6 | Satisfactory condition |
Bridge details
| Structure | Concrete channel beam |
| Length | about 23 ft |
| Location | 2 Mi SE Mt Vernon |
| NBI structure number | 041305200000000 |
| Condition class | Fair |
| Traffic status (item 41) | Posted for load |
| Last inspection (item 90) | February 2024 |
| Inspection interval (item 91) | 24 months |
| Scour (item 113) | 8: foundations stable, scour above the top of the footing |
Source: FHWA National Bridge Inventory, 2025 data as reported by the Illinois department of transportation.
Busiest bridges in Jefferson County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| I 64 over Oak Ridge School Ck | 1974 | 28,600 | Fair |
| I 64 over Harper Creek | 1974 | 28,300 | Fair |
| I 64 over Pierce Creek | 1974 | 28,300 | Fair |
| I 57 NB over Fap-726 & Un Pacf RR | 1968 | 21,400 | Good |
| I 57 SB over Fap-726 & Un Pacf RR | 1968 | 21,400 | Fair |
| I 57 NB over Ew RR | 1967 | 21,400 | Fair |
All bridges nearby: Jefferson County, IL bridge conditions · every bridge in Jefferson County · Illinois bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.