Fas 917 over Big Muddy River
Jackson County, Illinois · rated Fair in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- Fas 917 over Big Muddy River in Jackson County, Illinois, is rated in fair condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the deck, rated 6 (satisfactory condition) on the 0-9 scale.
- It was built in 1976, making it 49 years old at the 2025 inventory.
- It carries about 900 vehicles a day (traffic count year 2022).
- Its listed owner is the county highway agency.
- It is one of 62 of the 228 inventoried bridges in Jackson County rated fair (27.2%); 16 (7.0%) are rated poor.
- Its traffic status in the 2025 inventory is open, no restriction (NBI item 41).
- It was rated good in the 2024 inventory and is now fair (deck 8 to 6, superstructure 7 to 6, substructure 8 to 7).
- Its most recent inspection on record is dated March 2024, 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 → (37.7398, -89.42893)
Component ratings
| Component | Rating (2024) | Rating (2025) | FHWA scale meaning |
|---|---|---|---|
| Deck | 8 | 6 | Satisfactory condition |
| Superstructure | 7 | 6 | Satisfactory condition |
| Substructure | 8 | 7 | Good condition |
Bridge details
| Structure | Steel stringer or multi-beam girder |
| Length | about 483 ft |
| Location | SW 1/4 Sec 15-9-3 |
| NBI structure number | 039312200000000 |
| Condition class | Fair |
| Traffic status (item 41) | Open, no restriction |
| Last inspection (item 90) | March 2024 |
| 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 Jackson County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| Il 13 WB over Crab Orchard Creek | 1995 | 25,800 | Good |
| Ill 13 WB over Crab Orchard CR Ovfl | 1995 | 25,800 | Good |
| Il 13 EB over Crab Orchard Creek | 2021 | 25,800 | Good |
| Il 13 EB over Crab Orchard Creek | 2021 | 25,800 | Good |
| Ill Rte 13 over Trib-piles Fork Crk. | 1948 | 25,500 | Fair |
| Il Rte 13 over Little Crab Orchard | 2007 | 21,600 | Fair |
All bridges nearby: Jackson County, IL bridge conditions · every bridge in Jackson County · Illinois bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.