I 55 over SR 550
Lincoln County, Mississippi · rated Good in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- I 55 over SR 550 in Lincoln County, Mississippi, 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 1966, making it 59 years old at the 2025 inventory.
- It carries about 11,500 vehicles a day (traffic count year 2023).
- Its listed owner is the state highway agency.
- It is one of 218 of the 355 inventoried bridges in Lincoln County rated good (61.4%); 18 (5.1%) 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 February 2025, on a 24-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 → (31.58812, -90.47046)
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 stringer or multi-beam girder |
| Length | about 183 ft |
| Location | I 55 over SR 550 |
| NBI structure number | 11000550430407B |
| Condition class | Good |
| Traffic status (item 41) | Open, no restriction |
| Last inspection (item 90) | February 2025 |
| Inspection interval (item 91) | 24 months |
| Scour (item 113) | N: not over a waterway |
Source: FHWA National Bridge Inventory, 2025 data as reported by the Mississippi department of transportation.
Busiest bridges in Lincoln County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| I 55 over Unnamed Stream | 1965 | 21,000 | Fair |
| I 55 over Doolittle Branch | 1966 | 21,000 | Fair |
| I 55 over Bogue Chitto River | 1966 | 12,500 | Good |
| I 55 over Zetus Road | 1966 | 12,500 | Good |
| I 55 over Zetus Road | 1966 | 12,500 | Good |
| I 55 over Brookway Blvd | 1966 | 12,500 | Good |
All bridges nearby: Lincoln County, MS bridge conditions · every bridge in Lincoln County · Mississippi bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.