US Bridges

30th Street over Tributary to Northwest B

Fair

Prince George's County, Maryland · 0.03 MI S of Arundel Road · Structure no. 200000P-MO03020

Built
1952
73 years old
Condition
Fair
inspected January 2023
Type
Culvert
Concrete
Length
40 ft
3 main spans
Daily traffic
248
2021 count
Owner
City
City or Municipal Highway Agency

About this bridge

30th Street over Tributary to Northwest B is a concrete culvert carrying 30th Street over Tributary to Northwest B in Prince George's County, Maryland. It was built in 1952, so it is 73 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 248 vehicles a day, roughly 5% of them trucks, projected to reach 303 by 2041. The structure is 40 ft (12.2 m) long and 51 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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Carries30th Street
CrossesTributary to Northwest B
Location0.03 MI S of Arundel Road
RouteCity Street 9300
CountyPrince George's County
StateMaryland
Coordinates38.94618, -76.96685
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
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 inspectionJanuary 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 geometry7: Better than present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating36 US tons
Inventory rating36 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans3
Design loadHS 20
Structure length40 ft (12.2 m)
Longest span14 ft (4.3 m)
Deck width51 ft (15.5 m)
Roadway width35 ft (10.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic248 (2021)
Projected traffic303 by 2041
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

OwnerCity or Municipal Highway Agency
Maintained byCity or Municipal 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 30th Street over Tributary to Northwest B built?

It was built in 1952, making it 73 years old in 2025.

What condition is 30th Street over Tributary to Northwest B 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 January 2023.

How much traffic does 30th Street over Tributary to Northwest B carry?

About 248 vehicles per day (2021 count), of which roughly 5% are trucks.

How long is 30th Street over Tributary to Northwest B?

The structure is 40 ft (12.2 m) long with a longest span of 14 ft (4.3 m) and a deck 51 ft wide.

Who owns 30th Street over Tributary to Northwest B?

It is owned by the City or Municipal Highway Agency.