Tr 198 over Mosquito Creek
Christian County, Illinois · rated Poor in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- Tr 198 over Mosquito Creek in Christian County, Illinois, is rated in poor condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the substructure, rated 4 (poor condition) on the 0-9 scale.
- It was built in 2000, making it 25 years old at the 2025 inventory.
- It carries about 20 vehicles a day (traffic count year 2021).
- Its listed owner is a town or township highway agency.
- It is one of 55 of the 320 inventoried bridges in Christian County rated poor (17.2%); 55 (17.2%) 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 November 2024, on a 24-month routine inspection cycle.
- A poor rating means at least one major component - deck, superstructure, or substructure - is rated 4 or lower on FHWA's 0-9 scale. It does not by itself mean the bridge is unsafe; bridges judged unsafe are closed or load-restricted by their owners.
View this bridge on a map → (39.79219, -89.23628)
Component ratings
| Component | Rating (2024) | Rating (2025) | FHWA scale meaning |
|---|---|---|---|
| Deck | 6 | 6 | Satisfactory condition |
| Superstructure | 6 | 6 | Satisfactory condition |
| Substructure | 4 | 4 | Poor condition |
Bridge details
| Structure | Prestressed concrete multiple box beam |
| Length | about 126 ft |
| Location | 2 Mi NE Mt Auburn |
| NBI structure number | 011338100000000 |
| Condition class | Poor |
| Traffic status (item 41) | Open, no restriction |
| Last inspection (item 90) | November 2024 |
| 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 Christian County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| Il 29 over Panther Creek | 2005 | 12,200 | Good |
| Il 29 NB over Clear Creek | 2005 | 8,550 | Fair |
| Il 29 SB over Clear Creek | 2005 | 8,550 | Good |
| Il 29 over Clear Creek | 2005 | 8,550 | Good |
| Il 29 over Ditch | 2012 | 8,100 | Good |
| Il 29 over Drainage | 2012 | 8,100 | Good |
All bridges nearby: Christian County, IL bridge conditions · every bridge in Christian County · Illinois bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.