Tr 320 over Carter Creek
McDonough County, Illinois · rated Fair in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- Tr 320 over Carter Creek in McDonough County, Illinois, is rated in fair condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the superstructure, rated 5 (fair condition) on the 0-9 scale.
- It was built in 1900, making it 125 years old at the 2025 inventory.
- It carries about 75 vehicles a day (traffic count year 2016).
- Its listed owner is a town or township highway agency.
- It is one of 85 of the 210 inventoried bridges in McDonough County rated fair (40.5%); 13 (6.2%) 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 January 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 → (40.30651, -90.63011)
Component ratings
| Component | Rating (2024) | Rating (2025) | FHWA scale meaning |
|---|---|---|---|
| Deck | 6 | 6 | Satisfactory condition |
| Superstructure | 5 | 5 | Fair condition |
| Substructure | 5 | 5 | Fair condition |
Bridge details
| Structure | Steel stringer or multi-beam girder |
| Length | about 40 ft |
| Location | N.ctr-28-t4nr2w |
| NBI structure number | 055550200000000 |
| Condition class | Fair |
| Traffic status (item 41) | Open, no restriction |
| Last inspection (item 90) | January 2024 |
| 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 McDonough County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| US 67 over Town Creek Fork | 1988 | 6,350 | Fair |
| NB US 67 over Farmers Fork | 2012 | 6,350 | Fair |
| SB US 67 over Farmers Fork | 2012 | 6,350 | Fair |
| SB US 67 over E Fork Lamoine River | 1988 | 6,050 | Fair |
| NB US 67 over E Fork Lamoine River | 1988 | 6,050 | Fair |
| SB US 67 over E Fork Crooked Creek | 1996 | 4,850 | Fair |
All bridges nearby: McDonough County, IL bridge conditions · every bridge in McDonough County · Illinois bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.