Maryland bridges
Maryland reports 5,500 bridges and culverts across 24 counties. 240 (4.4%) are rated in poor condition, and 418 are posted with load limits or closed. The oldest structure still in the inventory dates from 1809.
Find a bridge in Maryland
Type at least two characters, or pick a condition or type, to search every bridge in the state.
Counties
Circle size reflects the number of bridges- Allegany County 244
- Anne Arundel County 392
- Baltimore city 374
- Baltimore County 786
- Calvert County 34
- Caroline County 70
- Carroll County 205
- Cecil County 193
- Charles County 94
- Dorchester County 47
- Frederick County 485
- Garrett County 140
- Harford County 276
- Howard County 312
- Kent County 44
- Montgomery County 522
- Prince George's County 576
- Queen Anne's County 88
- Somerset County 46
- St. Mary's County 50
- Talbot County 42
- Washington County 300
- Wicomico County 98
- Worcester County 82
Condition
Good32%(1,753)
Fair64%(3,507)
Poor4%(240)
Counties with the highest share of poor bridges
- Garrett County11.4% of 140
- Dorchester County10.6% of 47
- Caroline County10.0% of 70
- Baltimore city9.1% of 374
- Charles County8.5% of 94
Structure types
| Structure type | Bridges | Share |
|---|---|---|
| Stringer/Multi-beam or Girder | 2,673 | 48.6% |
| Culvert | 1,332 | 24.2% |
| Slab | 531 | 9.7% |
| Arch - Deck | 234 | 4.3% |
| Box Beam or Girders - Multiple | 196 | 3.6% |
| Truss - Thru | 145 | 2.6% |
| Tee Beam | 132 | 2.4% |
| Frame | 96 | 1.7% |
| Girder and Floorbeam System | 81 | 1.5% |
| Box Beam or Girders - Single or Spread | 32 | 0.6% |
| Movable - Bascule | 22 | 0.4% |
| Truss - Deck | 8 | 0.1% |
| Arch - Thru | 7 | 0.1% |
| Channel Beam | 5 | 0.1% |
| Suspension | 2 | 0.0% |
| Movable - Swing | 2 | 0.0% |
| Segmental Box Girder | 1 | 0.0% |
| Other | 1 | 0.0% |
When Maryland's bridges were built
Busiest
- Is 270 over Old Farm CreekFairMontgomery County · 265,320 vehicles/day
- Is 270 over Tuckerman LaneFairMontgomery County · 265,320 vehicles/day
- Is 495 over Stoney Brook DR Rock CRFairMontgomery County · 242,821 vehicles/day
- Is 495 over Md 650FairMontgomery County · 242,500 vehicles/day
- Is 270 & Cd Rds over Watts BranchFairMontgomery County · 239,460 vehicles/day
Longest
- US RTE 50 EB over Chesapeake BayFairAnne Arundel County · 21,289 ft
- US RTE 50 WB over Chesapeake BayFairAnne Arundel County · 21,051 ft
- U.S. Route 301 over Potomac RiverGoodCharles County · 9,966 ft
- Md 695 over Patapsco RiverFairBaltimore city · 9,091 ft
- US 50 over Choptank RiverFairDorchester County · 8,651 ft
Oldest
- York Road over Little FallsFairBaltimore County · Built 1809
- US 40 Alt over Antietam CreekFairWashington County · Built 1823
- Md 68 over Beaver CreekFairWashington County · Built 1824
- Roxbury Road over Antietam CreekFairWashington County · Built 1824
- Md 68 over Conococheague CreekFairWashington County · Built 1829
Newest
- Is 70 EB over Crystal Falls DriveGoodWashington County · Built 2024
- Md 193 (university over Northwest BranchGoodPrince George's County · Built 2024
- Md 193 (university over NW BranchGoodPrince George's County · Built 2024
- Jones Mill Road over Purple Line / Capital CRGoodMontgomery County · Built 2024
- Md 382 over Charles BranchGoodPrince George's County · Built 2024
Who owns Maryland's bridges
| State | 2,608 | 47.4% |
| County | 2,055 | 37.4% |
| City | 371 | 6.7% |
| Toll Authority | 321 | 5.8% |
| Federal | 88 | 1.6% |
| Town / Township | 22 | 0.4% |
| Local | 19 | 0.3% |
| Unknown | 7 | 0.1% |
| Railroad | 6 | 0.1% |
| Private | 3 | 0.1% |
More Maryland facts
Total bridge length204 miles
Total deck area58,988,798 sq ft
Culverts counted as bridges1,332 (24%)
On the National Highway System1,898
Posted with load limits393
Closed to traffic25
Listed or eligible for the National Register92
Average daily traffic per bridge21,282 vehicles
Newest structure2024