CR 600N over Lambertson Ditch
Madison County, Indiana · rated Fair in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- CR 600N over Lambertson Ditch in Madison County, Indiana, is rated in fair condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the deck, rated 5 (fair condition) on the 0-9 scale.
- It was built in 1989, making it 36 years old at the 2025 inventory.
- It carries about 147 vehicles a day (traffic count year 2023).
- Its listed owner is the county highway agency.
- It is one of 174 of the 301 inventoried bridges in Madison County rated fair (57.8%); 10 (3.3%) are rated poor.
- Its traffic status in the 2025 inventory is open, no restriction (NBI item 41).
- Its class is unchanged from 2024 (fair), but component ratings moved: deck 6 to 5, superstructure 7 to 5.
- Its most recent inspection on record is dated October 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 → (40.19228, -85.86084)
Component ratings
| Component | Rating (2024) | Rating (2025) | FHWA scale meaning |
|---|---|---|---|
| Deck | 6 | 5 | Fair condition |
| Superstructure | 7 | 5 | Fair condition |
| Substructure | 7 | 7 | Good condition |
Bridge details
| Structure | Timber slab |
| Length | about 25 ft |
| Location | 00.10 E SR 37 |
| NBI structure number | 4800060 |
| Condition class | Fair |
| Traffic status (item 41) | Open, no restriction |
| Last inspection (item 90) | October 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 Indiana department of transportation.
Busiest bridges in Madison County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| I-69 NB over Fosters Branch | 1966 | 30,223 | Good |
| I-69 SB over Fosters Branch | 1966 | 30,223 | Good |
| I-69 NB over Thorpe Creek | 1966 | 28,070 | Fair |
| I-69 SB over Thorpe Creek | 1966 | 28,070 | Fair |
| I-69 NB over SR 13 | 1966 | 28,070 | Fair |
| I-69 SB over SR 13 | 1966 | 28,070 | Good |
All bridges nearby: Madison County, IN bridge conditions · every bridge in Madison County · Indiana bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.