Tr 21 over Patterson Branch
Massac County, Illinois · rated Fair in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- Tr 21 over Patterson Branch in Massac County, Illinois, is rated in fair condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the deck, rated 5 (fair condition) on the 0-9 scale.
- It was built in 1983, making it 42 years old at the 2025 inventory.
- It carries about 50 vehicles a day (traffic count year 2020).
- Its listed owner is a town or township highway agency.
- It is one of 60 of the 132 inventoried bridges in Massac County rated fair (45.5%); 11 (8.3%) 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 December 2023, on a 24-month routine inspection cycle.
- 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 → (37.30239, -88.87656)
Component ratings
| Component | Rating (2024) | Rating (2025) | FHWA scale meaning |
|---|---|---|---|
| Deck | 5 | 5 | Fair condition |
| Superstructure | 5 | 5 | Fair condition |
| Substructure | 7 | 7 | Good condition |
Bridge details
| Structure | Prestressed concrete multiple box beam |
| Length | about 73 ft |
| Location | 1 Mi West US Rte 45 |
| NBI structure number | 064308500000000 |
| Condition class | Fair |
| Traffic status (item 41) | Open, no restriction |
| Last inspection (item 90) | December 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 Massac County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| I 24 over Or 4 Ft Massac St Pk | 1970 | 31,400 | Good |
| Interstate 24 over Ohio River | 1973 | 31,400 | Fair |
| I 24 over Georges Creek | 1971 | 20,500 | Fair |
| I 24 over E Fork Gurley Ditch | 1971 | 19,800 | Good |
| I 24 EB over Future Park Road | 1970 | 15,700 | Good |
| I 24 WB over Future Park Road | 1970 | 15,700 | Good |
All bridges nearby: Massac County, IL bridge conditions · every bridge in Massac County · Illinois bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.