Tr 493 over Middle Fork Creek
Hamilton County, Illinois · rated Good in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- Tr 493 over Middle Fork Creek in Hamilton County, Illinois, is rated in good condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the deck, rated 8 (very good condition) on the 0-9 scale.
- It was built in 2002, making it 23 years old at the 2025 inventory.
- It carries about 50 vehicles a day (traffic count year 2022).
- Its listed owner is a town or township highway agency.
- It is one of 134 of the 169 inventoried bridges in Hamilton County rated good (79.3%); 4 (2.4%) 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 February 2024, on a 48-month routine inspection cycle.
- A good rating means every major component - deck, superstructure, substructure, or culvert - is rated 7 or higher on FHWA's 0-9 scale: no more than minor problems.
View this bridge on a map → (37.92171, -88.69997)
Component ratings
| Component | Rating (2024) | Rating (2025) | FHWA scale meaning |
|---|---|---|---|
| Deck | 8 | 8 | Very good condition |
| Superstructure | 8 | 8 | Very good condition |
| Substructure | 8 | 8 | Very good condition |
Bridge details
| Structure | Prestressed concrete multiple box beam |
| Length | about 84 ft |
| Location | 4 Mi NW Cornerville |
| NBI structure number | 033329000000000 |
| Condition class | Good |
| Traffic status (item 41) | Open, no restriction |
| Last inspection (item 90) | February 2024 |
| Inspection interval (item 91) | 48 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 Hamilton County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| Il 14 over Stream | 2018 | 4,300 | Good |
| Fap-853 (ill-14) over Bear Creek | 1923 | 3,200 | Poor |
| Fap-855 (ill-14) over Lakey Creek | 1923 | 3,200 | Fair |
| Fap-776 (ill 142) over Stream | 1992 | 3,150 | Good |
| Fap-849 (ill-142) over Middle Creek | 1929 | 2,700 | Fair |
| Fap-849 (ill-142) over Stream | 1929 | 2,700 | Fair |
All bridges nearby: Hamilton County, IL bridge conditions · every bridge in Hamilton County · Illinois bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.