Ch 20(FAS 1660) over I-70
Clark County, Illinois · rated Fair in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- Ch 20(FAS 1660) over I-70 in Clark 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 1968 and reconstructed in 2002, making it 57 years old at the 2025 inventory.
- It carries about 400 vehicles a day (traffic count year 2021).
- Its listed owner is the state highway agency.
- It is one of 79 of the 231 inventoried bridges in Clark County rated fair (34.2%); 9 (3.9%) 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 June 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 → (39.42546, -87.60129)
Component ratings
| Component | Rating (2024) | Rating (2025) | FHWA scale meaning |
|---|---|---|---|
| Deck | 6 | 6 | Satisfactory condition |
| Superstructure | 6 | 6 | Satisfactory condition |
| Substructure | 7 | 7 | Good condition |
Bridge details
| Structure | Continuous steel stringer or multi-beam girder |
| Length | about 227 ft |
| Location | 3.5 Mi W State Line |
| NBI structure number | 012003000000000 |
| Condition class | Fair |
| Traffic status (item 41) | Open, no restriction |
| Last inspection (item 90) | June 2024 |
| Inspection interval (item 91) | 24 months |
| Scour (item 113) | N: not over a waterway |
Source: FHWA National Bridge Inventory, 2025 data as reported by the Illinois department of transportation.
Busiest bridges in Clark County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| I-70 over E Mill Creek Trib | 1969 | 23,400 | Fair |
| I-70 over E Mill Creek | 1969 | 23,400 | Fair |
| I-70 over E Mill Creek | 1969 | 23,400 | Fair |
| I-70 over Kettering Branch | 1968 | 23,400 | Fair |
| Fai 70 over Ditch | 1971 | 23,400 | Fair |
| I-70 over Stream | 1968 | 22,800 | Good |
All bridges nearby: Clark County, IL bridge conditions · every bridge in Clark County · Illinois bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.