Ch 6 over Kaskaskia River
Douglas County, Illinois · rated Good in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- Ch 6 over Kaskaskia River in Douglas County, Illinois, is rated in good condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the deck, rated 8 (very good condition) on the 0-9 scale.
- It was built in 2021 and reconstructed in 2022, making it 4 years old at the 2025 inventory.
- It carries about 25 vehicles a day (traffic count year 2022).
- Its listed owner is the county highway agency.
- It is one of 173 of the 233 inventoried bridges in Douglas County rated good (74.2%); 4 (1.7%) are rated poor.
- Its traffic status in the 2025 inventory is open, no restriction (NBI item 41).
- Its class is unchanged from 2024 (good), but component ratings moved: deck 9 to 8, superstructure 9 to 8, substructure 9 to 8.
- Its most recent inspection on record is dated October 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 → (39.86472, -88.36483)
Component ratings
| Component | Rating (2024) | Rating (2025) | FHWA scale meaning |
|---|---|---|---|
| Deck | 9 | 8 | Very good condition |
| Superstructure | 9 | 8 | Very good condition |
| Substructure | 9 | 8 | Very good condition |
Bridge details
| Structure | Concrete stringer or multi-beam girder |
| Length | about 146 ft |
| Location | 4.65 mi N of Garrett |
| NBI structure number | 021404000000000 |
| Condition class | Good |
| Traffic status (item 41) | Open, no restriction |
| Last inspection (item 90) | October 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 Douglas County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| I-57 over Stream | 1968 | 22,700 | Good |
| I-57 (NB) over Fap 323(US 36) | 1968 | 11,050 | Good |
| I-57 (SB) over Fap 323(US 36) | 1968 | 11,050 | Good |
| I-57 (NB) over UPRR & Decatur&Estrn ILR | 1969 | 11,050 | Fair |
| I-57 (SB) over UPRR & Decatur&Estrn ILR | 1969 | 11,050 | Fair |
| I-57 (NB) over Hayes Branch | 1969 | 11,050 | Fair |
All bridges nearby: Douglas County, IL bridge conditions · every bridge in Douglas County · Illinois bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.