US 421 over Mp Hill Ditch
Pulaski County, Indiana · rated Fair in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- US 421 over Mp Hill Ditch in Pulaski 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 1993, making it 32 years old at the 2025 inventory.
- It carries about 3,989 vehicles a day (traffic count year 2004).
- Its listed owner is the state highway agency.
- It is one of 69 of the 102 inventoried bridges in Pulaski County rated fair (67.6%); 2 (2.0%) 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 2023, 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 → (40.93094, -86.89172)
Component ratings
| Component | Rating (2024) | Rating (2025) | FHWA scale meaning |
|---|---|---|---|
| Culvert | 6 | 6 | Satisfactory condition |
Bridge details
| Structure | Concrete culvert |
| Length | about 27 ft |
| Location | 00.23 S SR 114 |
| NBI structure number | 032400 |
| Condition class | Fair |
| Traffic status (item 41) | Open, no restriction |
| Last inspection (item 90) | May 2023 |
| 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 Pulaski County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| US 35 over Quigley Marsh Ditch | 2011 | 8,928 | Good |
| US 421 over Mosley Ditch | 1985 | 5,222 | Good |
| SR 14 over Tippecanoe River | 1952 | 4,468 | Good |
| US 421 over Muck Pocket & Antrim Dit | 1931 | 4,420 | Good |
| US 35 over Tippecanoe River | 1982 | 4,204 | Good |
| US 35 over Dilts & Anstis Ditch | 1993 | 3,912 | Fair |
All bridges nearby: Pulaski County, IN bridge conditions · every bridge in Pulaski County · Indiana bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.