Tr 46 over N Fk of Riley Creek
Hancock County, Illinois · rated Good in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- Tr 46 over N Fk of Riley Creek in Hancock 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 1981, making it 44 years old at the 2025 inventory.
- It carries about 50 vehicles a day (traffic count year 2023).
- Its listed owner is a town or township highway agency.
- It is one of 122 of the 290 inventoried bridges in Hancock County rated good (42.1%); 63 (21.7%) 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 April 2022, 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 → (40.55089, -91.327)
Component ratings
| Component | Rating (2024) | Rating (2025) | FHWA scale meaning |
|---|---|---|---|
| Deck | 7 | 7 | Good condition |
| Superstructure | 7 | 7 | Good condition |
| Substructure | 7 | 7 | Good condition |
Bridge details
| Structure | Prestressed concrete multiple box beam |
| Length | about 56 ft |
| Location | 2.0 E Nauvoo |
| NBI structure number | 034550300000000 |
| Condition class | Good |
| Traffic status (item 41) | Open, no restriction |
| Last inspection (item 90) | April 2022 |
| 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 Hancock County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| US 136 over Hamilton Slough | 1954 | 10,500 | Good |
| US 136 over Miss R/1ST/KEOKUK Jct RR | 1985 | 10,500 | Fair |
| Il 336 over Trib to Praire CR | 2006 | 4,200 | Good |
| Il 94 (NB) over Slater Creek | 2003 | 4,050 | Fair |
| Il 94 (SB) over Slater Creek | 2002 | 4,050 | Fair |
| US 136 over Il 336 | 2006 | 4,000 | Good |
All bridges nearby: Hancock County, IL bridge conditions · every bridge in Hancock County · Illinois bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.