Tr 388 over Thompson Reservoir
Franklin County, Illinois · rated Poor in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- Tr 388 over Thompson Reservoir in Franklin County, Illinois, is rated in poor condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the superstructure, rated 4 (poor condition) on the 0-9 scale.
- It was built in 1900, making it 125 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 9 of the 310 inventoried bridges in Franklin County rated poor (2.9%); 9 (2.9%) are rated poor.
- Its traffic status in the 2025 inventory is posted for load (NBI item 41).
- Its condition class and component ratings are unchanged from the 2024 inventory.
- Its most recent inspection on record is dated July 2023, on a 24-month routine inspection cycle.
- A poor rating means at least one major component - deck, superstructure, or substructure - is rated 4 or lower on FHWA's 0-9 scale. It does not by itself mean the bridge is unsafe; bridges judged unsafe are closed or load-restricted by their owners.
View this bridge on a map → (37.94615, -88.7447)
Component ratings
| Component | Rating (2024) | Rating (2025) | FHWA scale meaning |
|---|---|---|---|
| Deck | 7 | 7 | Good condition |
| Superstructure | 4 | 4 | Poor condition |
| Substructure | 6 | 6 | Satisfactory condition |
Bridge details
| Structure | Steel stringer or multi-beam girder |
| Length | about 25 ft |
| Location | Tr 388 Ov Thomp Res |
| NBI structure number | 028304000000000 |
| Condition class | Poor |
| Traffic status (item 41) | Posted for load |
| Last inspection (item 90) | July 2023 |
| Inspection interval (item 91) | 24 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 Franklin County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| I 57 over Tr 213 Linn Rd | 1962 | 37,200 | Fair |
| I 57 over Drain Ditch (rend L) | 1963 | 35,700 | Fair |
| I-57 NB over Pond Creek | 2022 | 19,900 | Fair |
| I-57 SB over Pond Creek | 2022 | 19,900 | Fair |
| Interstate 57 NB over 7TH St | 2012 | 18,600 | Fair |
| Interstate 57 SB over 7TH St | 2012 | 18,600 | Fair |
All bridges nearby: Franklin County, IL bridge conditions · every bridge in Franklin County · Illinois bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.