Md 304 over Mason Branch
Caroline County, Maryland · rated Fair in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- Md 304 over Mason Branch in Caroline 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 1900 and reconstructed in 1962, making it 125 years old at the 2025 inventory.
- It carries about 2,942 vehicles a day (traffic count year 2009).
- Its listed owner is the state highway agency.
- It is one of 44 of the 70 inventoried bridges in Caroline County rated fair (62.9%); 7 (10.0%) 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 → (39.0331, -75.88281)
Component ratings
| Component | Rating (2025) | FHWA scale meaning |
|---|---|---|
| Deck | 5 | Fair condition |
| Superstructure | 5 | Fair condition |
| Substructure | 5 | Fair condition |
Bridge details
| Structure | Concrete deck arch |
| Length | about 81 ft |
| Location | on Queen Annes Co Line |
| NBI structure number | 100000050018010 |
| Condition class | Fair |
Source: FHWA National Bridge Inventory, 2025 data as reported by the Maryland department of transportation.
Busiest bridges in Caroline County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| Md 404 EB over Watts Creek | 1949 | 21,772 | Fair |
| Md 404 over Choptank River | 1983 | 20,471 | Fair |
| Md 404 over Tuckahoe Creek | 2016 | 20,442 | Good |
| Md 404 over Br of Tuckahoe Creek | 2017 | 19,600 | Good |
| Md 404 WB over Watts Creek | 2006 | 18,941 | Fair |
| Md 404 EB over Md 313 | 1987 | 15,421 | Fair |
All bridges nearby: Caroline County, MD bridge conditions · every bridge in Caroline County · Maryland bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.