US Bridges

Md 648E over Patapsco River

Fair

Anne Arundel County, Maryland · On Baltimore County Line · Structure no. 100000020056010

Built
1992
33 years old
Condition
Fair
inspected August 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
420 ft
4 main spans
Daily traffic
14,929
2024 count
Owner
State
State Highway Agency

About this bridge

Md 648E over Patapsco River is a steel stringer/multi-beam or girder carrying Md 648E over Patapsco River in Anne Arundel County, Maryland. It was built in 1992, so it is 33 years old, younger than the Maryland average of 52.6 years.

The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 6 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

It carries about 14,929 vehicles a day, roughly 8% of them trucks, projected to reach 19,080 by 2046. The structure is 420 ft (128 m) long and 46 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

CarriesMd 648E
CrossesPatapsco River
LocationOn Baltimore County Line
RouteState Highway 648E
Coordinates39.22482, -76.64146
Functional classUrban Minor Arterial

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionAugust 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating110.1 US tons
Inventory rating62.9 US tons

Structure

MaterialSteel
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20
Structure length420 ft (128 m)
Longest span114 ft (34.7 m)
Deck width46 ft (14.1 m)
Roadway width38 ft (11.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic14,929 (2024)
Projected traffic19,080 by 2046
Trucks8%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed3.1 mi (5 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusPossibly eligible for the National Register; requires further investigation
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Md 648E over Patapsco River built?

It was built in 1992, making it 33 years old in 2025.

What condition is Md 648E over Patapsco River in?

The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in August 2023.

How much traffic does Md 648E over Patapsco River carry?

About 14,929 vehicles per day (2024 count), of which roughly 8% are trucks.

How long is Md 648E over Patapsco River?

The structure is 420 ft (128 m) long with a longest span of 114 ft (34.7 m) and a deck 46 ft wide.

Who owns Md 648E over Patapsco River?

It is owned by the State Highway Agency.