Tr 108 over Rock CR
Menard County, Illinois · rated Good in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- Tr 108 over Rock CR in Menard 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 2021, making it 4 years old at the 2025 inventory.
- It carries about 125 vehicles a day (traffic count year 2020).
- Its listed owner is a town or township highway agency.
- It is one of 36 of the 89 inventoried bridges in Menard County rated good (40.4%); 10 (11.2%) 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 October 2023, 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 → (39.94224, -89.78389)
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 74 ft |
| Location | 3.0 Mi SW Athens |
| NBI structure number | 065308700000000 |
| Condition class | Good |
| Traffic status (item 41) | Open, no restriction |
| Last inspection (item 90) | October 2023 |
| 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 Menard County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| Il 97/IL 123 over Hemp Factory Branch | 1994 | 4,850 | Good |
| Ill 123 over Sangamon River | 1985 | 4,800 | Fair |
| Ill 29 over Indian Creek | 1957 | 4,200 | Fair |
| Ill 97 & 123 over Rocky Branch Creek | 1990 | 4,200 | Good |
| Ill 97 over Rock Creek | 1989 | 3,900 | Good |
| Ill 97 over C&im RR | 1939 | 2,750 | Fair |
All bridges nearby: Menard County, IL bridge conditions · every bridge in Menard County · Illinois bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.