St. Mary Road over Tangipahoa River
Pike County, Mississippi · rated Good in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- St. Mary Road over Tangipahoa River in Pike County, Mississippi, is rated in good condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the deck, rated 7 (good condition) on the 0-9 scale.
- It was built in 2013, making it 12 years old at the 2025 inventory.
- It carries about 99 vehicles a day (traffic count year 2022).
- Its listed owner is the county highway agency.
- It is one of 111 of the 211 inventoried bridges in Pike County rated good (52.6%); 12 (5.7%) are rated poor.
- 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 → (31.06042, -90.47167)
Component ratings
| Component | Rating (2025) | FHWA scale meaning |
|---|---|---|
| Deck | 7 | Good condition |
| Superstructure | 8 | Very good condition |
| Substructure | 8 | Very good condition |
Bridge details
| Structure | Steel through truss |
| Length | about 140 ft |
| Location | Sec 11 T 1N R 7E B |
| NBI structure number | SA570000000A009 |
| Condition class | Good |
Source: FHWA National Bridge Inventory, 2025 data as reported by the Mississippi department of transportation.
Busiest bridges in Pike County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| I 55 over Minnehaha Creek | 1960 | 22,000 | Good |
| I 55 over Tangipahoa River Trib | 1960 | 18,000 | Good |
| I 55 over Tangipahoa River Relief | 1960 | 18,000 | Fair |
| US 98 over Cnic RR | 1940 | 18,000 | Fair |
| US 98 over Unnamed Stream | 1939 | 18,000 | Fair |
| I 55 over SR 570 | 1959 | 14,500 | Fair |
All bridges nearby: Pike County, MS bridge conditions · every bridge in Pike County · Mississippi bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.