US-1 NB (SR-15) over St. Marys River
DeKalb County, Georgia · rated Fair in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- US-1 NB (SR-15) over St. Marys River in DeKalb County, Georgia, is rated in fair condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the deck, rated 6 (satisfactory condition) on the 0-9 scale.
- It was built in 1957, making it 68 years old at the 2025 inventory.
- It carries about 4,941 vehicles a day (traffic count year 2022).
- Its listed owner is the state highway agency.
- It is one of 97 of the 392 inventoried bridges in DeKalb County rated fair (24.7%); 4 (1.0%) 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 → (30.77667, -81.97889)
Component ratings
| Component | Rating (2025) | FHWA scale meaning |
|---|---|---|
| Deck | 6 | Satisfactory condition |
| Superstructure | 7 | Good condition |
| Substructure | 7 | Good condition |
Bridge details
| Structure | Steel stringer or multi-beam girder |
| Length | about 381 ft |
| Location | Fl. - Ga. Line |
| NBI structure number | 000000004990010 |
| Condition class | Fair |
Source: FHWA National Bridge Inventory, 2025 data as reported by the Georgia department of transportation.
Busiest bridges in DeKalb County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| I-85 over N Fork Peachtree Creek | 1957 | 296,000 | Good |
| I-285 over SR 13 Buford Highway | 1958 | 234,000 | Good |
| I-285 over N Fork Nancy Creek | 1960 | 230,000 | Good |
| I-285 over Nancy Creek | 1961 | 225,000 | Good |
| I-285 over SR 141 Ptree Ind. Blvd. | 1961 | 225,000 | Fair |
| I-285 Ramp over SR 141 Ptree Ind. Blvd. | 2023 | 225,000 | Good |
All bridges nearby: DeKalb County, GA bridge conditions · every bridge in DeKalb County · Georgia bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.