Tr 221 over Lake Fork Ck Tr 1B
Logan County, Illinois · rated Fair in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- Tr 221 over Lake Fork Ck Tr 1B in Logan County, Illinois, is rated in fair condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the culvert, rated 6 (satisfactory condition) on the 0-9 scale.
- It was built in 1974, making it 51 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 183 of the 292 inventoried bridges in Logan County rated fair (62.7%); 27 (9.2%) 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 November 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 → (39.97551, -89.31638)
Component ratings
| Component | Rating (2024) | Rating (2025) | FHWA scale meaning |
|---|---|---|---|
| Culvert | 6 | 6 | Satisfactory condition |
Bridge details
| Structure | Continuous concrete culvert |
| Length | about 36 ft |
| Location | .5 N 1.5 Mi E Lk Fk |
| NBI structure number | 054515200000000 |
| Condition class | Fair |
| Traffic status (item 41) | Open, no restriction |
| Last inspection (item 90) | November 2023 |
| 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 Logan County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| I-55 over Hurlbut Creek | 1974 | 34,900 | Fair |
| I 55 & E&w Fr Rds over Wolf Creek | 1944 | 33,125 | Fair |
| I-55 over Drainage Ditch | 1974 | 32,400 | Fair |
| I-55 over Clear Creek | 1976 | 21,600 | Fair |
| I-55 over Drainage Ditch | 1974 | 21,500 | Fair |
| I-55 over Trib Lake Fork | 1922 | 17,450 | Fair |
All bridges nearby: Logan County, IL bridge conditions · every bridge in Logan County · Illinois bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.