US Bridges

Gwynn Oak Avenue over Tributary to Dead Run

FairPosted for load

Baltimore County, Maryland · 0.18 MI N of Security Blv · Structure no. 200000B-0324020

Built
1956
69 years old
Condition
Fair
inspected October 2024
Type
Culvert
Concrete
Length
40 ft
Daily traffic
6,550
2024 count
Owner
County
County Highway Agency

About this bridge

Gwynn Oak Avenue over Tributary to Dead Run is a concrete culvert carrying Gwynn Oak Avenue over Tributary to Dead Run in Baltimore County, Maryland. It was built in 1956, so it is 69 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. Its operating status is: posted for load restriction.

It carries about 6,550 vehicles a day, roughly 2% of them trucks, projected to reach 8,292 by 2044. The structure is 40 ft (12.3 m) long. If it were closed, the detour would be 1.9 mi (3 km).

Location

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CarriesGwynn Oak Avenue
CrossesTributary to Dead Run
Location0.18 MI N of Security Blv
RouteCounty Highway 2475
CountyBaltimore County
StateMaryland
Coordinates39.31442, -76.72978
Functional classUrban 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
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionOctober 2024
Inspection intervalevery 12 months
Operating statusPosted for load restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating44.5 US tons
Inventory rating26.5 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans0
Design loadH 20
Structure length40 ft (12.3 m)
Longest span16 ft (4.9 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic6,550 (2024)
Projected traffic8,292 by 2044
Trucks2%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed1.9 mi (3 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 Gwynn Oak Avenue over Tributary to Dead Run built?

It was built in 1956, making it 69 years old in 2025.

What condition is Gwynn Oak Avenue over Tributary to Dead Run 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 October 2024.

How much traffic does Gwynn Oak Avenue over Tributary to Dead Run carry?

About 6,550 vehicles per day (2024 count), of which roughly 2% are trucks.

How long is Gwynn Oak Avenue over Tributary to Dead Run?

The structure is 40 ft (12.3 m) long with a longest span of 16 ft (4.9 m).

Who owns Gwynn Oak Avenue over Tributary to Dead Run?

It is owned by the County Highway Agency.