Ill 146 over Root Lick Branch
Pope County, Illinois · rated Fair in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- Ill 146 over Root Lick Branch in Pope County, Illinois, is rated in fair condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the substructure, rated 6 (satisfactory condition) on the 0-9 scale.
- It was built in 1929 and reconstructed in 2009, making it 96 years old at the 2025 inventory.
- It carries about 1,250 vehicles a day (traffic count year 2023).
- Its listed owner is the state highway agency.
- It is one of 25 of the 87 inventoried bridges in Pope County rated fair (28.7%); 4 (4.6%) 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 March 2023, 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 → (37.38003, -88.63581)
Component ratings
| Component | Rating (2024) | Rating (2025) | FHWA scale meaning |
|---|---|---|---|
| Deck | 7 | 7 | Good condition |
| Superstructure | 7 | 7 | Good condition |
| Substructure | 6 | 6 | Satisfactory condition |
Bridge details
| Structure | Prestressed concrete multiple box beam |
| Length | about 44 ft |
| Location | 2.4 Mi E of Ill 145 |
| NBI structure number | 076000800000000 |
| Condition class | Fair |
| Traffic status (item 41) | Open, no restriction |
| Last inspection (item 90) | March 2023 |
| Inspection interval (item 91) | 24 months |
| Scour (item 113) | 5: foundations stable, scour within the limits of the footing or piles |
Source: FHWA National Bridge Inventory, 2025 data as reported by the Illinois department of transportation.
Busiest bridges in Pope County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| Ill 34 over Gibbons Creek | 1924 | 2,350 | Fair |
| Ill 34 over Trib to Gibbon Creek | 1991 | 2,350 | Good |
| Ill 34-fap 778 over Unnamed Stream | 2011 | 2,350 | Good |
| Ill 146 over Lusk Creek | 1964 | 2,150 | Fair |
| Ill 145 over Bay Creek Ditch | 1982 | 1,750 | Fair |
| Il 145 over Bay Creek | 2024 | 1,750 | Good |
All bridges nearby: Pope County, IL bridge conditions · every bridge in Pope County · Illinois bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.