Long Swamp Road over Sullivan Branch
Caroline County, Maryland · rated Poor in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- Long Swamp Road over Sullivan Branch in Caroline County, Maryland, is rated in poor condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the substructure, rated 3 (serious condition) on the 0-9 scale.
- It was built in 1953, making it 72 years old at the 2025 inventory.
- It carries about 108 vehicles a day (traffic count year 2024).
- Its listed owner is the county highway agency.
- It is one of 7 of the 70 inventoried bridges in Caroline County rated poor (10.0%); 7 (10.0%) are rated poor.
- Its traffic status in the 2025 inventory is posted for load (NBI item 41).
- Its condition class and component ratings are unchanged from the 2024 inventory.
- Its most recent inspection on record is dated November 2024, on a 12-month routine inspection cycle.
- A poor rating means at least one major component - deck, superstructure, or substructure - is rated 4 or lower on FHWA's 0-9 scale. It does not by itself mean the bridge is unsafe; bridges judged unsafe are closed or load-restricted by their owners.
View this bridge on a map → (38.74415, -75.7787)
Component ratings
| Component | Rating (2024) | Rating (2025) | FHWA scale meaning |
|---|---|---|---|
| Deck | 4 | 4 | Poor condition |
| Superstructure | 5 | 5 | Fair condition |
| Substructure | 3 | 3 | Serious condition |
Bridge details
| Structure | Timber stringer or multi-beam girder |
| Length | about 26 ft |
| Location | 1.3 Mi SE of Agner |
| NBI structure number | 200000CO0039010 |
| Condition class | Poor |
| Traffic status (item 41) | Posted for load |
| Last inspection (item 90) | November 2024 |
| Inspection interval (item 91) | 12 months |
| Scour (item 113) | 7: scour countermeasures installed |
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.