Md 6 over Locks Swamp Creek
St. Mary's County, Maryland · rated Fair in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- Md 6 over Locks Swamp Creek in St. Mary's County, Maryland, is rated in fair condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the deck, rated 5 (fair condition) on the 0-9 scale.
- It was built in 1930, making it 95 years old at the 2025 inventory.
- It carries about 1,951 vehicles a day (traffic count year 2009).
- Its listed owner is the state highway agency.
- It is one of 35 of the 50 inventoried bridges in St. Mary's County rated fair (70.0%); 2 (4.0%) 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 December 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 → (38.46375, -76.71353)
Component ratings
| Component | Rating (2024) | Rating (2025) | FHWA scale meaning |
|---|---|---|---|
| Deck | 5 | 5 | Fair condition |
| Superstructure | 5 | 5 | Fair condition |
| Substructure | 6 | 6 | Satisfactory condition |
Bridge details
| Structure | Concrete slab |
| Length | about 22 ft |
| Location | 0.1 M W of Laurel View Ln |
| NBI structure number | 100000180012010 |
| Condition class | Fair |
| Traffic status (item 41) | Open, no restriction |
| Last inspection (item 90) | December 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 Maryland department of transportation.
Busiest bridges in St. Mary's County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| Md 4 over Kingston Creek | 1980 | 26,801 | Fair |
| Md 5 over St Marys River | 1955 | 22,642 | Fair |
| Md 5 over Mcintosh Run | 1935 | 22,220 | Fair |
| Md 5 over Branch of Mcintosh Run | 2017 | 22,220 | Good |
| Md 5 over Town Run | 1990 | 21,360 | Fair |
| Md 4 over St Marys River | 1974 | 18,051 | Fair |
All bridges nearby: St. Mary's County, MD bridge conditions · every bridge in St. Mary's County · Maryland bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.