Tr 20 Johnny Run R over Waupecon Creek
Grundy County, Illinois · rated Fair in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- Tr 20 Johnny Run R over Waupecon Creek in Grundy County, Illinois, is rated in fair condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the substructure, rated 6 (satisfactory condition) on the 0-9 scale.
- It was built in 1983, making it 42 years old at the 2025 inventory.
- It carries about 75 vehicles a day (traffic count year 2024).
- Its listed owner is a town or township highway agency.
- It is one of 95 of the 268 inventoried bridges in Grundy County rated fair (35.4%); 76 (28.4%) 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 → (41.20556, -88.54945)
Component ratings
| Component | Rating (2025) | FHWA scale meaning |
|---|---|---|
| Deck | 8 | Very good condition |
| Superstructure | 7 | Good condition |
| Substructure | 6 | Satisfactory condition |
Bridge details
| Structure | Concrete channel beam |
| Length | about 102 ft |
| Location | .3 Mi S Prairie Rd |
| NBI structure number | 032488100000000 |
| Condition class | Fair |
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.