Tr 69 over Big Slough Ditch
Henry County, Illinois · rated Good in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- Tr 69 over Big Slough Ditch in Henry County, Illinois, is rated in good condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the deck, rated 8 (very good condition) on the 0-9 scale.
- It was built in 2004, making it 21 years old at the 2025 inventory.
- It carries about 75 vehicles a day (traffic count year 2020).
- Its listed owner is a town or township highway agency.
- It is one of 154 of the 329 inventoried bridges in Henry County rated good (46.8%); 42 (12.8%) 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 → (41.5122, -90.08711)
Component ratings
| Component | Rating (2024) | Rating (2025) | FHWA scale meaning |
|---|---|---|---|
| Deck | 8 | 8 | Very good condition |
| Superstructure | 8 | 8 | Very good condition |
| Substructure | 8 | 8 | Very good condition |
Bridge details
| Structure | Prestressed concrete multiple box beam |
| Length | about 61 ft |
| Location | 5.5 Mi NE Geneseo |
| NBI structure number | 037335200000000 |
| 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 Henry County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| I-80 over Drainage Ditch | 1962 | 17,900 | Fair |
| I 80 over Oat Creek | 1961 | 17,300 | Good |
| I74 & I280 over Turner Creek | 1962 | 15,000 | Fair |
| I-74 & 280 over Drainage Ditch | 1962 | 15,000 | Fair |
| I-74 over Mud Creek | 1962 | 15,000 | Good |
| I 74 over Stream | 1962 | 15,000 | Fair |
All bridges nearby: Henry County, IL bridge conditions · every bridge in Henry County · Illinois bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.