Scour-Critical Bridges in Maryland

Maryland has 52 bridges rated scour-critical by the Federal Highway Administration. These bridges have foundations that are unstable or at risk of undermining during flood events. Scour-critical doesn't mean a bridge is about to collapse — it means extra monitoring and countermeasures are in place — but these structures are priorities for repair or replacement.

How this ranking works

This state list filters to NBI scour ratings 0 through 3, then sorts by average daily traffic. It is intended to show flood-vulnerability exposure, not to label any bridge as currently unsafe.

Bridge	County	Scour Rating	Daily Traffic	Condition
I-83 over Jones Falls & Union AVE	Baltimore	3 — Serious	95,051	Fair
Belair Road over Herring Run	Baltimore	3 — Serious	22,752	Fair
Loch Raven Bouleva over Chinquapin Run	Baltimore	3 — Serious	20,285	Fair
Loch Raven Bouleva over Chinquapin Run	Baltimore	3 — Serious	20,285	Fair
Macarthur Blvd. over Cabin John Creek	Montgomery	3 — Serious	12,300	Fair
Radecke Avenue over Moores Run	Baltimore	3 — Serious	10,737	Poor
Billingsley Road over Mattawoman Creek	Charles	3 — Serious	7,843	Fair
Town Center Blvd. over Tributary To Severn Run	Anne Arundel	3 — Serious	7,820	Fair
Glen Road over Piney Branch	Montgomery	3 — Serious	4,689	Fair
Kensington Parkway over Silver Creek	Montgomery	3 — Serious	4,601	Fair
Bumpy Oak Road over Mattawoman Creek	Charles	3 — Serious	4,509	Fair
Remington Avenue over Stoney Run	Baltimore	2 — Critical	4,280	Poor
Cuba Road over Western Run	Baltimore	3 — Serious	3,524	Fair
Shelbourne Road over Tributary To West Branch	Baltimore	3 — Serious	3,000	Fair
Accident Bear Cree over Bear Creek	Garrett	3 — Serious	2,345	Fair
Leeds Road over Little Elk Creek	Cecil	3 — Serious	2,203	Fair
Wolfsville Road over Beaver Creek	Washington	3 — Serious	1,500	Fair
Bryantown Road over Mill Dam Run	Charles	3 — Serious	1,497	Poor
Woodville Road over Swanson Creek	Charles	3 — Serious	1,383	Fair
Martinsburg Road over Potomac River Tributary	Montgomery	3 — Serious	1,322	Fair
Dogwood Road over Brice Run	Baltimore	3 — Serious	1,300	Fair
Keedysville Road over Antietam Creek	Washington	3 — Serious	1,173	Fair
Bexhill Drive over Silver Creek	Montgomery	3 — Serious	1,029	Fair
Barnesville Road over Little Monocacy River	Montgomery	3 — Serious	918	Fair
Yarrowsburg Road over Israel Creek	Washington	3 — Serious	687	Poor
Trinity Church RD over Gilbert Swamp Run	Charles	3 — Serious	656	Poor
State Park Road over Cherry Creek	Garrett	3 — Serious	655	Poor
Mckendree Road over Lyons Creek	Anne Arundel	3 — Serious	623	Poor
Barnes Road over Bennett Creek	Montgomery	3 — Serious	608	Poor
Savage River Road over Crabtree Creek	Garrett	3 — Serious	598	Fair
Savage River Road over Poplar Lick Run	Garrett	3 — Serious	544	Fair
Liverpool Pt Road over Beaverdam Creek	Charles	3 — Serious	448	Fair
Schaeffer Road over Little Seneca Creek	Montgomery	3 — Serious	437	Poor
Black Rock Road over Great Seneca Creek	Montgomery	3 — Serious	400	Fair
Robbin Street over Jackson Run	Allegany	3 — Serious	338	Fair
Hunter Mill Road over Tributary To First Mine	Baltimore	3 — Serious	325	Fair
Burnside Bridge RD over Sharmans Branch	Washington	3 — Serious	310	Fair
Baptist Road over Alloway Creek	Carroll	3 — Serious	269	Fair
Mummaford Road over Monocacy River	Carroll	3 — Serious	268	Poor
Mckinstry Mill RD over Little Pipe Creek	Carroll	3 — Serious	234	Poor
Pigs Ear Road over Mill Run	Garrett	3 — Serious	205	Fair
Appletown Road over Tributary Of Dog Creek	Washington	3 — Serious	172	Poor
Stines Store Road over Gilbert Swamp Run	Charles	3 — Serious	137	Poor
Mckinstrys Mill RD over Sams Creek	Carroll	3 — Serious	119	Poor
New Valley Road over Basin Run	Cecil	3 — Serious	110	Fair
Mill Street over Rock Run	Cecil	3 — Serious	100	Poor
Merrimack Place over Ditchley Prong	Charles	3 — Serious	55	Fair
Big Run Road over Big Run	Garrett	3 — Serious	55	Fair
Arthur Devine Road over Bear Creek	Garrett	3 — Serious	27	Fair
Grove Road over Mill Run	Garrett	3 — Serious	12	Fair
Alan Fike Road over Mill Run	Garrett	3 — Serious	11	Poor
Lost Land Run Road over Tributary Of Lost Land R	Garrett	3 — Serious	5	Poor