US Bridges

Southern Cross Dri over Tributary to Gwynns Fall

Fair

Baltimore County, Maryland · 0.03 MI N of Alter ST · Structure no. 200000B-0328010

Built
1955
70 years old
Condition
Fair
inspected July 2023
Type
Slab
Prestressed Concrete
Length
41 ft
2 main spans
Daily traffic
4,436
2023 count
Owner
County
County Highway Agency

About this bridge

Southern Cross Dri over Tributary to Gwynns Fall is a prestressed concrete slab carrying Southern Cross Dri over Tributary to Gwynns Fall in Baltimore County, Maryland. It was built in 1955, so it is 70 years old, older 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 4,436 vehicles a day, roughly 5% of them trucks, projected to reach 5,413 by 2043. The structure is 41 ft (12.6 m) long and 42 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesSouthern Cross Dri
CrossesTributary to Gwynns Fall
Location0.03 MI N of Alter ST
RouteCounty Highway 1877
CountyBaltimore County
StateMaryland
Coordinates39.35075, -76.71881
Functional classUrban Local

Condition and inspection

Fair

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

ComponentRatingMeaning
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJuly 2023
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 alignment8: Equal to present desirable criteria
Operating rating91.9 US tons
Inventory rating57 US tons

Structure

Structure typeSlab
MaterialPrestressed Concrete
DeckNot applicable
Main spans2
Design loadHS 20
Structure length41 ft (12.6 m)
Longest span20 ft (6.1 m)
Deck width42 ft (12.8 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic4,436 (2023)
Projected traffic5,413 by 2043
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed1.2 mi (2 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 Southern Cross Dri over Tributary to Gwynns Fall built?

It was built in 1955, making it 70 years old in 2025.

What condition is Southern Cross Dri over Tributary to Gwynns Fall 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 July 2023.

How much traffic does Southern Cross Dri over Tributary to Gwynns Fall carry?

About 4,436 vehicles per day (2023 count), of which roughly 5% are trucks.

How long is Southern Cross Dri over Tributary to Gwynns Fall?

The structure is 41 ft (12.6 m) long with a longest span of 20 ft (6.1 m) and a deck 42 ft wide.

Who owns Southern Cross Dri over Tributary to Gwynns Fall?

It is owned by the County Highway Agency.