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Southern Connector over Tributary to St. John CR

Calvert County, Maryland · rated Good in the 2025 National Bridge Inventory

United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled August 20, 2026

Southern Connector over Tributary to St. John CR in Calvert County, Maryland, is rated in good condition in the 2025 National Bridge Inventory (as of August 20, 2026).
Its lowest-rated component is the deck, rated 7 (good condition) on the 0-9 scale.
It was built in 2008, making it 17 years old at the 2025 inventory.
It carries about 7,626 vehicles a day (traffic count year 2022).
Its listed owner is the county highway agency.
It is one of 16 of the 34 inventoried bridges in Calvert County rated good (47.1%); 0 (0.0%) are rated poor.
A good rating means every major component - deck, superstructure, substructure, or culvert - is rated 7 or higher on FHWA's 0-9 scale: no more than minor problems.

Component ratings

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

Bridge	Built	Vehicles/day	Condition
Md 2 SB over Hunting Creek	1992	46,798	Fair
Md 4 SB over Lyons Creek	1959	46,661	Fair
Md 4 NB over Lyons Creek	1987	46,661	Fair
Md 4 Nbr over Hall Creek	1966	35,171	Fair
Md 4 over Patuxent River & Town CR	1977	28,338	Fair
Md 2 & 4 over Quaker Swamp	1987	27,798	Good