Ch 8 over Flat Branch
Coles County, Illinois · rated Good in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- Ch 8 over Flat Branch in Coles County, Illinois, is rated in good condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the deck, rated 7 (good condition) on the 0-9 scale.
- It was built in 1985, making it 40 years old at the 2025 inventory.
- It carries about 75 vehicles a day (traffic count year 2024).
- Its listed owner is the county highway agency.
- It is one of 122 of the 302 inventoried bridges in Coles County rated good (40.4%); 21 (7.0%) 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 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 → (39.60803, -88.23306)
Component ratings
| Component | Rating (2024) | Rating (2025) | FHWA scale meaning |
|---|---|---|---|
| Deck | 7 | 7 | Good condition |
| Superstructure | 7 | 7 | Good condition |
| Substructure | 7 | 7 | Good condition |
Bridge details
| Structure | Prestressed concrete multiple box beam |
| Length | about 49 ft |
| Location | 5 Mi E of Humboldt |
| NBI structure number | 015323000000000 |
| Condition class | Good |
| Traffic status (item 41) | Open, no restriction |
| Last inspection (item 90) | January 2024 |
| Inspection interval (item 91) | 48 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 Coles County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| I-57 over Stream | 1968 | 22,700 | Fair |
| I-57 over Stream | 1966 | 21,000 | Fair |
| I-57 over Kickapoo Creek | 1965 | 19,800 | Fair |
| I-57 over Stream | 1965 | 19,800 | Good |
| Il 16 EB (fap 91) over Eastern IL RR | 1961 | 15,100 | Fair |
| Il 16 WB (fap 91) over Eastern IL RR | 1961 | 15,100 | Fair |
All bridges nearby: Coles County, IL bridge conditions · every bridge in Coles County · Illinois bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.