Bridge conditions in Montgomery County, Maryland

522 inventoried bridges · 25 rated poor · 2025 National Bridge Inventory

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

Montgomery County tracks close to typical: 25 of its 522 inventoried bridges (4.8%) are rated poor, against a national rate of about 7%.

• 25 of the 522 bridges in Montgomery County, Maryland, are rated in poor condition (4.8%) in the 2025 National Bridge Inventory, as of August 20, 2026.
• 205 bridges (39.3%) are rated good and 292 (55.9%) fair.
• The median Montgomery County bridge was built in 1983.
• The busiest poor-rated bridge is Clara Barton Parkw over Clara Barton Parkway (SB (built 1959), carrying about 40,057 vehicles a day.

Good 39.3% · Fair 55.9% · Poor 4.8% of 522 bridges

Bridges rated poor

Every bridge in the county with a poor rating, busiest first. Poor means a major component is rated 4 or lower on FHWA's 0-9 scale; it is a repair flag, not a closure notice.

Busiest bridges in the county

Source: FHWA National Bridge Inventory, 2025. Counts cover inventoried highway bridges over 20 feet; ratings are reported by the state DOT.

All of Maryland: Maryland bridge conditions by county · every download on the data page.

Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.