US 231 over Dog Leg Ditch
Porter County, Indiana · rated Fair in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- US 231 over Dog Leg Ditch in Porter County, Indiana, is rated in fair condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the culvert, rated 6 (satisfactory condition) on the 0-9 scale.
- It was built in 1983, making it 42 years old at the 2025 inventory.
- It carries about 8,585 vehicles a day (traffic count year 2004).
- Its listed owner is the state highway agency.
- It is one of 151 of the 279 inventoried bridges in Porter County rated fair (54.1%); 13 (4.7%) are rated poor.
- 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 → (41.29634, -87.19971)
Component ratings
| Component | Rating (2025) | FHWA scale meaning |
|---|---|---|
| Culvert | 6 | Satisfactory condition |
Bridge details
| Structure | Steel culvert |
| Length | about 33 ft |
| Location | 0.48 N of S Jct SR 2 |
| NBI structure number | 080856 |
| Condition class | Fair |
Source: FHWA National Bridge Inventory, 2025 data as reported by the Indiana department of transportation.
Busiest bridges in Porter County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| I-94 EB over US 20 Willow CR CSX RR | 1966 | 83,652 | Good |
| I-94 EB over NS RR | 1969 | 80,516 | Fair |
| I-94 EB over Beam Street | 1969 | 80,516 | Fair |
| I-94 WB over Little Calumet River | 1969 | 80,516 | Good |
| I-94 EB over Jensen Dr | 1968 | 70,574 | Fair |
| I-94 EB over CSX RR | 1969 | 57,732 | Fair |
All bridges nearby: Porter County, IN bridge conditions · every bridge in Porter County · Indiana bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.