US Bridges

Marriottsville Roa over North Branch of Patapsco

Fair

Baltimore County, Maryland · At Balt-Carroll CO Line · Structure no. 200000B-0052010

Built
1976
49 years old
Condition
Fair
inspected February 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
188 ft
3 main spans
Daily traffic
5,358
2024 count
Owner
County
County Highway Agency

About this bridge

Marriottsville Roa over North Branch of Patapsco is a steel continuous stringer/multi-beam or girder carrying Marriottsville Roa over North Branch of Patapsco in Baltimore County, Maryland. It was built in 1976, so it is 49 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 5 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 5,358 vehicles a day, roughly 2% of them trucks, projected to reach 7,182 by 2044. The structure is 188 ft (57.3 m) long and 39 ft wide. If it were closed, the detour would be 8.7 mi (14 km).

Location

Open in Google Maps
CarriesMarriottsville Roa
CrossesNorth Branch of Patapsco
LocationAt Balt-Carroll CO Line
RouteCounty Highway 533
CountyBaltimore County
StateMaryland
Coordinates39.36467, -76.88549
Functional classRural Major Collector

Condition and inspection

Fair

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

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionFebruary 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating41.4 US tons
Inventory rating25 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length188 ft (57.3 m)
Longest span71 ft (21.6 m)
Deck width39 ft (11.9 m)
Roadway width36 ft (11 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic5,358 (2024)
Projected traffic7,182 by 2044
Trucks2%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed8.7 mi (14 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Marriottsville Roa over North Branch of Patapsco built?

It was built in 1976, making it 49 years old in 2025.

What condition is Marriottsville Roa over North Branch of Patapsco 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 February 2024.

How much traffic does Marriottsville Roa over North Branch of Patapsco carry?

About 5,358 vehicles per day (2024 count), of which roughly 2% are trucks.

How long is Marriottsville Roa over North Branch of Patapsco?

The structure is 188 ft (57.3 m) long with a longest span of 71 ft (21.6 m) and a deck 39 ft wide.

Who owns Marriottsville Roa over North Branch of Patapsco?

It is owned by the County Highway Agency.