Tr-10a over the Slough
Lawrence County, Illinois · rated Fair in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- Tr-10a over the Slough in Lawrence County, Illinois, is rated in fair condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the deck, rated 6 (satisfactory condition) on the 0-9 scale.
- It was built in 1977, making it 48 years old at the 2025 inventory.
- It carries about 50 vehicles a day (traffic count year 2021).
- Its listed owner is a town or township highway agency.
- It is one of 74 of the 185 inventoried bridges in Lawrence County rated fair (40.0%); 42 (22.7%) 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 2025, 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 → (38.81434, -87.88948)
Component ratings
| Component | Rating (2024) | Rating (2025) | FHWA scale meaning |
|---|---|---|---|
| Deck | 6 | 6 | Satisfactory condition |
| Superstructure | 6 | 6 | Satisfactory condition |
| Substructure | 6 | 6 | Satisfactory condition |
Bridge details
| Structure | Concrete channel beam |
| Length | about 65 ft |
| Location | 1.5 Mi SW Chauncey |
| NBI structure number | 051314000000000 |
| Condition class | Fair |
| Traffic status (item 41) | Open, no restriction |
| Last inspection (item 90) | January 2025 |
| 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 Lawrence County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| Fap-327wb (US-50) over Fas-1827 | 1958 | 7,200 | Poor |
| Fap-327eb (US-50) over Fas-1827 | 1958 | 7,200 | Fair |
| Fap-327eb (US 50) over Beaver Pond Ditch | 1957 | 7,200 | Poor |
| Fap-327wb (US-50) over Beaver Pond Ditch | 1957 | 7,200 | Poor |
| Fap-327eb (US-50) over Allison Ditch No 1 | 1957 | 7,200 | Poor |
| Fap-327wb (US-50) over Allison Ditch No 1 | 1957 | 7,200 | Poor |
All bridges nearby: Lawrence County, IL bridge conditions · every bridge in Lawrence County · Illinois bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.