N Elizabeth Route over Plum River
Carroll County, Illinois · rated Good in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- N Elizabeth Route over Plum River in Carroll 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 1961 and reconstructed in 2000, making it 64 years old at the 2025 inventory.
- It carries about 450 vehicles a day (traffic count year 2021).
- Its listed owner is the county highway agency.
- It is one of 58 of the 180 inventoried bridges in Carroll County rated good (32.2%); 26 (14.4%) 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 May 2024, 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 → (42.14854, -90.05235)
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 | Continuous steel stringer or multi-beam girder |
| Length | about 259 ft |
| Location | 4MILES NW Mt.carroll |
| NBI structure number | 008310800000000 |
| Condition class | Good |
| Traffic status (item 41) | Open, no restriction |
| Last inspection (item 90) | May 2024 |
| Inspection interval (item 91) | 48 months |
| Scour (item 113) | 5: foundations stable, scour within the limits of the footing or piles |
Source: FHWA National Bridge Inventory, 2025 data as reported by the Illinois department of transportation.
Busiest bridges in Carroll County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| Il 84 over BNSF RR | 1988 | 5,550 | Fair |
| Il 84 over Soo Line Rr/city St | 1988 | 5,550 | Fair |
| Ill 84 over Plum River | 1978 | 4,200 | Fair |
| US 52 & Il 64 over Straddle Creek | 1996 | 3,500 | Good |
| US 52 & Il 64 over Plum River | 1999 | 3,450 | Fair |
| Ill 73 over Straddle Creek | 1989 | 3,350 | Fair |
All bridges nearby: Carroll County, IL bridge conditions · every bridge in Carroll County · Illinois bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.