3RD St over Mendota CR
LaSalle County, Illinois · rated Good in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- 3RD St over Mendota CR in LaSalle County, Illinois, is rated in good condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the culvert, rated 7 (good condition) on the 0-9 scale.
- It was built in 2006, making it 19 years old at the 2025 inventory.
- It carries about 375 vehicles a day (traffic count year 2020).
- Its listed owner is a city or municipal highway agency.
- It is one of 198 of the 528 inventoried bridges in LaSalle County rated good (37.5%); 75 (14.2%) 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 August 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 → (41.54394, -89.1241)
Component ratings
| Component | Rating (2024) | Rating (2025) | FHWA scale meaning |
|---|---|---|---|
| Culvert | 7 | 7 | Good condition |
Bridge details
| Structure | Concrete culvert |
| Length | about 37 ft |
| Location | S Edge Mendota |
| NBI structure number | 050701500000000 |
| Condition class | Good |
| Traffic status (item 41) | Open, no restriction |
| Last inspection (item 90) | August 2024 |
| 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 LaSalle County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| I-80 EB & WB over Clark Run Creek | 2004 | 29,300 | Good |
| Ill 71 and Ill 23 over Il Rv & Acc Rd | 1981 | 22,900 | Fair |
| I-39 US 51 over Il Rv/il 351/ Bo RR | 1984 | 19,400 | Fair |
| I-39/US 51 over Conveyor Belt/pvt Rd | 1985 | 19,400 | Fair |
| I-39 over SE Half Conveyor B | 1961 | 19,400 | Fair |
| I-39 US 51 over Stream | 1989 | 19,400 | Good |
All bridges nearby: LaSalle County, IL bridge conditions · every bridge in LaSalle County · Illinois bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.