US Bridges

D Street N.W. over Center Leg Inner Loop

Fair

District of Columbia, District of Columbia · D ST over Inner Loop NW · Structure no. 1138

Built
1967
58 years old, rebuilt 2002
Condition
Fair
inspected August 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
163 ft
2 main spans
Daily traffic
54,000
2018 count
Owner
State
State Highway Agency

About this bridge

D Street N.W. over Center Leg Inner Loop is a steel stringer/multi-beam or girder carrying D Street N.W. over Center Leg Inner Loop in District of Columbia, District of Columbia. It was built in 1967 and reconstructed in 2002, so it is 58 years old, younger than the District of Columbia average of 63.7 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 54,000 vehicles a day, roughly 2% of them trucks, projected to reach 54,000 by 2027. The structure is 163 ft (49.7 m) long and 60 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesD Street N.W.
CrossesCenter Leg Inner Loop
LocationD ST over Inner Loop NW
RouteCity Street 0
CountyDistrict of Columbia
StateDistrict of Columbia
Coordinates38.89481, -77.01444
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionAugust 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry2: Basically intolerable, requiring high priority of replacement
Approach roadway alignment8: Equal to present desirable criteria
Operating rating89.9 US tons
Inventory rating54 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20
Structure length163 ft (49.7 m)
Longest span79 ft (24.1 m)
Deck width60 ft (18.4 m)
Roadway width38 ft (11.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic54,000 (2018)
Projected traffic54,000 by 2027
Trucks2%
Lanes on structure3
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesHighway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedOther structural work, including hydraulic replacements
Estimated improvement cost$1.5 million
NavigationNot applicable (no waterway)

Frequently asked questions

When was D Street N.W. over Center Leg Inner Loop built?

It was built in 1967, making it 58 years old in 2025. It was reconstructed in 2002.

What condition is D Street N.W. over Center Leg Inner Loop 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 2024.

How much traffic does D Street N.W. over Center Leg Inner Loop carry?

About 54,000 vehicles per day (2018 count), of which roughly 2% are trucks.

How long is D Street N.W. over Center Leg Inner Loop?

The structure is 163 ft (49.7 m) long with a longest span of 79 ft (24.1 m) and a deck 60 ft wide.

Who owns D Street N.W. over Center Leg Inner Loop?

It is owned by the State Highway Agency.