TR 171 Jerusalem R over Trib to Cahokia Cr
Madison County, Illinois · rated Good in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- TR 171 Jerusalem R over Trib to Cahokia Cr in Madison County, Illinois, is rated in good condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the culvert, rated 8 (very good condition) on the 0-9 scale.
- It was built in 2020, making it 5 years old at the 2025 inventory.
- It carries about 250 vehicles a day (traffic count year 2021).
- Its listed owner is a town or township highway agency.
- It is one of 247 of the 524 inventoried bridges in Madison County rated good (47.1%); 46 (8.8%) 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 October 2023, 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 → (38.86452, -89.92317)
Component ratings
| Component | Rating (2024) | Rating (2025) | FHWA scale meaning |
|---|---|---|---|
| Culvert | 8 | 8 | Very good condition |
Bridge details
| Structure | Concrete culvert |
| Length | about 26 ft |
| Location | 2 Mi SW of Carpenter |
| NBI structure number | 060337100000000 |
| Condition class | Good |
| Traffic status (item 41) | Open, no restriction |
| Last inspection (item 90) | October 2023 |
| Inspection interval (item 91) | 48 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 Madison County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| Fai 270 over Mississippi River | 1966 | 46,200 | Fair |
| I-270 EB & WB over Chain of Rocks Canal | 2014 | 46,200 | Good |
| Fai 270 EB over Mississippi River | 2024 | 46,200 | Good |
| Fai 270 over Water Main | 1964 | 46,200 | Good |
| I-55/70 over Brush Creek | 1962 | 46,000 | Fair |
| Fai 70 over Canteen Ck | 1939 | 45,600 | Good |
All bridges nearby: Madison County, IL bridge conditions · every bridge in Madison County · Illinois bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.