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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 August 20, 2026

Long Swamp Road over Sullivan Branch in Caroline County, Maryland, is rated in poor condition in the 2025 National Bridge Inventory (as of August 20, 2026).
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.
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.

Component ratings


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

Source: FHWA National Bridge Inventory, 2025 data as reported by the Maryland department of transportation.

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