TR-165 (Scully Roa over Trib W Fk Mazon Rv
Grundy County, Illinois · rated Good in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- TR-165 (Scully Roa over Trib W Fk Mazon Rv in Grundy 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 2016, making it 9 years old at the 2025 inventory.
- It carries about 50 vehicles a day (traffic count year 2024).
- Its listed owner is a town or township highway agency.
- It is one of 97 of the 268 inventoried bridges in Grundy County rated good (36.2%); 76 (28.4%) 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 2022, 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 → (41.12343, -88.47328)
Component ratings
| Component | Rating (2024) | Rating (2025) | FHWA scale meaning |
|---|---|---|---|
| Culvert | 8 | 8 | Very good condition |
Bridge details
| Structure | Continuous concrete culvert |
| Length | about 20 ft |
| Location | 0.48mi. W. Verona Rd |
| NBI structure number | 032551000000000 |
| Condition class | Good |
| Traffic status (item 41) | Open, no restriction |
| Last inspection (item 90) | October 2022 |
| 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 Grundy County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| Fai 80 (EB & WB) over Fas285/ch5/ridge Rd | 2003 | 50,300 | Fair |
| Fai 080 (EB & WB) over Walley Run CR | 2003 | 39,100 | Good |
| Fai 80 (EB & WB) over Aux Sable Crk | 2003 | 39,100 | Fair |
| Fai 80 (EB & WB) over Collins Run Creek | 2003 | 39,100 | Good |
| Fai-55 & Or 66 over Woods Run | 1979 | 24,300 | Good |
| I-55 over Brewster Run | 1979 | 22,900 | Good |
All bridges nearby: Grundy County, IL bridge conditions · every bridge in Grundy County · Illinois bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.