Loudoun County Bridge Report Card

Loudoun County scores 99 out of 100 on BridgeLookup's Bridge Condition Exposure Score, based on FHWA National Bridge Inventory records.

A99 / 100

Local infrastructure snapshot

Loudoun County, Virginia

Loudoun County has 442 bridges in the National Bridge Inventory, with 3 rated poor and 0 rated scour-critical. Its poor-condition share of 0.7% is at or below the 3.4% statewide average. Poor-condition bridges carry about 2,503 daily vehicle crossings.

442Total Bridges

3Poor (0.7%)

207Fair (46.8%)

0Scour-Critical

Quote-Ready Local Facts

0.7%of county bridges are in poor condition, compared with 3.4% statewide and 6.7% nationally.

2,503daily vehicle crossings are on poor-condition bridges in the county.

0bridges are rated scour-critical, or 0.0% of the county bridge inventory.

Copyable Facts for Reporters

BridgeLookup.com gives Loudoun County a Bridge Condition Exposure Score of 99/100 (A). The county has 442 bridges in the National Bridge Inventory, including 3 in poor condition and 0 rated scour-critical. Poor-condition bridges carry about 2,503 daily vehicle crossings. Poor condition does not mean unsafe; bridges judged unsafe are closed or restricted by transportation agencies.

Download all county report-card scores as CSV.

How the Score Breaks Down

Factor	Weight	County Value	Penalty
Poor-condition bridge share	40	0.7%	1.4
Poor-condition traffic exposure	25	0.0% of measured traffic	0.0
Scour-critical bridge share	20	0.0%	0.0
Average age vs national baseline	10	37 years vs 48 nationally	0.0
Traffic-data completeness	5	5,216,168 measured daily crossings	0.0

Score = 100 minus weighted penalties. The score is a comparative research signal, not an official safety rating. Read the full methodology.

County Comparisons

County Poor-Condition Share	0.7%
State Poor-Condition Share	3.4%
National Poor-Condition Share	6.7%
County Scour-Critical Share	0.0%
Average Bridge Age	37 years
Poor-Condition Traffic Exposure	2,503 vehicles/day

Bridges to Watch

Busiest Poor-Condition BridgeThomas Avenue over Sugarland Run — 1,687 vehicles/day Oldest Listed BridgeSnickersville Road over Beaverdam Creek — built in 1820 All County BridgesBrowse every bridge record in Loudoun County.

Top Bridges to Watch in Loudoun County

Bridge	Reason	Condition	Daily Traffic	Year Built
Thomas Avenue over Sugarland Run	Poor condition + traffic exposure	Poor	1,687	1970
New Road over Bull Run	Poor condition + traffic exposure	Poor	621	1993
Davis Court over Tuscarora Creek	Poor condition + traffic exposure	Poor	195	1971
Sully Road over Tributary Horsepen Run	High traffic	Fair	184,788	1963
Sully Rd. over Cabin Branch	High traffic	Fair	127,227	1963
Rte. 28 NB over Dulles Access RD	High traffic	Fair	93,735	1963
Rte. 28 SB over Dulles Access Road	High traffic	Good	93,735	1988
Sully Road Rte.28 over Merrybrook Run	High traffic	Fair	84,996	1961
Harry Byrd Highway over Broad Run	High traffic	Fair	71,111	1949
Harry Byrd Highway over Broad Run	High traffic	Fair	71,111	1969

Important safety note

Poor condition does not mean a bridge is unsafe. It means at least one major component has significant deterioration and the bridge is a priority for maintenance, repair, or replacement. Bridges judged unsafe are closed or restricted by transportation agencies.