Tr 138 over Swanwick Creek
Perry County, Illinois · rated Good in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- Tr 138 over Swanwick Creek 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 1983, making it 42 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.
- 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 January 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 → (38.17051, -89.40763)
Component ratings
| Component | Rating (2024) | Rating (2025) | FHWA scale meaning |
|---|---|---|---|
| Deck | 7 | 7 | Good condition |
| Superstructure | 7 | 7 | Good condition |
| Substructure | 8 | 8 | Very good condition |
Bridge details
| Structure | Prestressed concrete multiple box beam |
| Length | about 60 ft |
| Location | 2 Mi S FAS1822 |
| NBI structure number | 073313200000000 |
| Condition class | Good |
| Traffic status (item 41) | Open, no restriction |
| Last inspection (item 90) | January 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 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.