Tr 164 over Slade Branch
Perry County, Illinois · rated Good in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- Tr 164 over Slade Branch in Perry County, Illinois, is rated in good condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the deck, rated 7 (good condition) on the 0-9 scale.
- It was built in 2005, making it 20 years old at the 2025 inventory.
- It carries about 20 vehicles a day (traffic count year 2024).
- Its listed owner is a town or township highway agency.
- It is one of 51 of the 136 inventoried bridges in Perry County rated good (37.5%); 10 (7.4%) are rated poor.
- 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 → (38.21069, -89.36606)
Component ratings
| Component | Rating (2025) | FHWA scale meaning |
|---|---|---|
| Deck | 7 | Good condition |
| Superstructure | 7 | Good condition |
| Substructure | 8 | Very good condition |
Bridge details
| Structure | Prestressed concrete multiple box beam |
| Length | about 41 ft |
| Location | .2 Mi S Washington C |
| NBI structure number | 073317600000000 |
| Condition class | Good |
Source: FHWA National Bridge Inventory, 2025 data as reported by the Illinois department of transportation.
Busiest bridges in Perry County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| US 51 over Half-mile Creek | 1921 | 6,350 | Fair |
| Ill 154 over Beaucoup Creek | 1962 | 5,750 | Poor |
| Fap 42-il 13/127 over Chicken Creek | 2001 | 4,700 | Good |
| US 51-fap322 over Chstnt-cnic-oak-alley | 1997 | 4,400 | Fair |
| Ill 127 over Opossum Creek | 1936 | 4,150 | Fair |
| Fap 841-il 154 over Little Beaucoup CR | 2001 | 4,000 | Good |
All bridges nearby: Perry County, IL bridge conditions · every bridge in Perry County · Illinois bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.