Tr 123 over N Branch of Larry Ck
Hancock County, Illinois · rated Poor in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- Tr 123 over N Branch of Larry Ck in Hancock County, Illinois, is rated in poor condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the culvert, rated 4 (poor condition) on the 0-9 scale.
- It was built in 1960, making it 65 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 63 of the 290 inventoried bridges in Hancock County rated poor (21.7%); 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 February 2025, 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 → (40.50691, -91.2938)
Component ratings
| Component | Rating (2024) | Rating (2025) | FHWA scale meaning |
|---|---|---|---|
| Culvert | 4 | 4 | Poor condition |
Bridge details
| Structure | Continuous concrete culvert |
| Length | about 38 ft |
| Location | 4 M SE Nauvoo |
| NBI structure number | 034551200000000 |
| Condition class | Poor |
| Traffic status (item 41) | Open, no restriction |
| Last inspection (item 90) | February 2025 |
| 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 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.