Loudermilk Road over Flat Creek
Knox County, Indiana · rated Poor in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- Loudermilk Road over Flat Creek in Knox County, Indiana, is rated in poor condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the deck, rated 4 (poor condition) on the 0-9 scale.
- It was built in 1940, making it 85 years old at the 2025 inventory.
- It carries about 50 vehicles a day (traffic count year 2016).
- Its listed owner is the county highway agency.
- It is one of 13 of the 290 inventoried bridges in Knox County rated poor (4.5%); 13 (4.5%) are rated poor.
- Its traffic status in the 2025 inventory is posted for load (NBI item 41).
- Its condition class and component ratings are unchanged from the 2024 inventory.
- Its most recent inspection on record is dated August 2024, on a 12-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 → (38.71582, -87.35466)
Component ratings
| Component | Rating (2024) | Rating (2025) | FHWA scale meaning |
|---|---|---|---|
| Deck | 4 | 4 | Poor condition |
| Superstructure | 6 | 6 | Satisfactory condition |
| Substructure | 6 | 6 | Satisfactory condition |
Bridge details
| Structure | Steel stringer or multi-beam girder |
| Length | about 34 ft |
| Location | 01.00 NE of State Road 55 |
| NBI structure number | 4200146 |
| Condition class | Poor |
| Traffic status (item 41) | Posted for load |
| Last inspection (item 90) | August 2024 |
| Inspection interval (item 91) | 12 months |
| Scour (item 113) | 4: foundations stable, field review says exposed foundations need protection |
Source: FHWA National Bridge Inventory, 2025 data as reported by the Indiana department of transportation.
Busiest bridges in Knox County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| US 41 NB over 2 City Streets CSX RR | 1961 | 21,710 | Good |
| US 41 SB over 2 City Streets CSX RR | 1961 | 21,710 | Good |
| US 41 NB (middle) over US 50 WB Ramp to US 41 S | 1967 | 19,317 | Good |
| Hart Street over US 41 Nb/sb | 1967 | 17,173 | Fair |
| US 41 NB over Snapp Creek | 1963 | 15,500 | Good |
| US 41 SB over Snapp Creek | 1963 | 15,500 | Good |
All bridges nearby: Knox County, IN bridge conditions · every bridge in Knox County · Indiana bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.