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Is 83 Nbr over Thornton Mill Road

Baltimore County, Maryland · rated Fair in the 2025 National Bridge Inventory

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

Is 83 Nbr over Thornton Mill Road in Baltimore County, Maryland, is rated in fair condition in the 2025 National Bridge Inventory (as of August 20, 2026).
Its lowest-rated component is the deck, rated 6 (satisfactory condition) on the 0-9 scale.
It was built in 1953 and reconstructed in 1989, making it 72 years old at the 2025 inventory.
It carries about 60,263 vehicles a day (traffic count year 2009).
Its listed owner is the state highway agency.
It is one of 528 of the 786 inventoried bridges in Baltimore County rated fair (67.2%); 22 (2.8%) 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.

Component ratings


Structure	Continuous steel stringer or multi-beam girder
Length	about 110 ft
Location	0.9 M S of Br No 0305500
NBI structure number	100000030056011
Condition class	Fair

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

Bridge	Built	Vehicles/day	Condition
Is 83/IS 695 over Thornton Road	1954	222,500	Fair
Is 695 over Md 26	2012	210,600	Good
Is 695 & Belmont A over Dead Run	1961	206,852	Fair
Is 695 over Mta Light Rail	1955	205,485	Fair
Is 695 over Security Boulevard	1961	203,902	Good
Is 695 over Dogwood Road	1961	203,902	Fair