Ill 9 over Mackinaw River
Tazewell County, Illinois · rated Fair in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- Ill 9 over Mackinaw River in Tazewell County, Illinois, is rated in fair condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the deck, rated 5 (fair condition) on the 0-9 scale.
- It was built in 1929 and reconstructed in 1982, making it 96 years old at the 2025 inventory.
- It carries about 2,700 vehicles a day (traffic count year 2023).
- Its listed owner is the state highway agency.
- It is one of 216 of the 358 inventoried bridges in Tazewell County rated fair (60.3%); 53 (14.8%) are rated poor.
- 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 → (40.52201, -89.39562)
Component ratings
| Component | Rating (2025) | FHWA scale meaning |
|---|---|---|
| Deck | 5 | Fair condition |
| Superstructure | 5 | Fair condition |
| Substructure | 6 | Satisfactory condition |
Bridge details
| Structure | Continuous prestressed concrete stringer or multi-beam girder |
| Length | about 490 ft |
| Location | 1.5 Mi W of Mackinaw |
| NBI structure number | 090006300000000 |
| Condition class | Fair |
Source: FHWA National Bridge Inventory, 2025 data as reported by the Illinois department of transportation.
Busiest bridges in Tazewell County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| I-74 over Ill Riv T&p RR | 1958 | 57,800 | Fair |
| EB I-74 over Altorfer St | 2005 | 57,000 | Fair |
| EB I-74 over Ill 116(MAIN St) | 2005 | 40,800 | Fair |
| I-74 over US150 & Bike Path | 2015 | 39,000 | Fair |
| EB US 150 over Illinois River & T&p RR | 1948 | 30,000 | Poor |
| WB US 150 over Ill River T&p RR | 1982 | 30,000 | Poor |
All bridges nearby: Tazewell County, IL bridge conditions · every bridge in Tazewell County · Illinois bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.