US Bridges

South Capitol St. over Anacostia River

Good

District of Columbia, District of Columbia · South Capitol St. · Structure no. 1450

Built
2021
4 years old
Condition
Good
inspected May 2024
Type
Arch - Thru
Steel
Length
1,445 ft
3 main spans
Daily traffic
59,600
2020 count
Owner
State
State Highway Agency

About this bridge

South Capitol St. over Anacostia River is a steel arch - thru carrying South Capitol St. over Anacostia River in District of Columbia, District of Columbia. It was built in 2021, so it is 4 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 good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 59,600 vehicles a day, roughly 5% of them trucks, projected to reach 62,500 by 2040. The structure is 1,445 ft (440.4 m) long and 122 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesSouth Capitol St.
CrossesAnacostia River
LocationSouth Capitol St.
RouteCity Street 0_
CountyDistrict of Columbia
StateDistrict of Columbia
Coordinates38.86951, -77.00797
Functional classUrban Minor Arterial

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure8 Very GoodNo problems noted.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionMay 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation7: Better than present minimum criteria
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating52.9 US tons
Inventory rating40.7 US tons

Structure

Structure typeArch - Thru
MaterialSteel
DeckConcrete, precast panels
Main spans3
Design loadHL 93
Structure length1,445 ft (440.4 m)
Longest span540 ft (164.6 m)
Deck width122 ft (37.3 m)
Roadway width72 ft (21.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic59,600 (2020)
Projected traffic62,500 by 2040
Trucks5%
Lanes on structure6
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesHighway and waterway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemYes

Ownership and planned work

OwnerState Highway Agency
Maintained byState 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 South Capitol St. over Anacostia River built?

It was built in 2021, making it 4 years old in 2025.

What condition is South Capitol St. over Anacostia River in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in May 2024.

How much traffic does South Capitol St. over Anacostia River carry?

About 59,600 vehicles per day (2020 count), of which roughly 5% are trucks.

How long is South Capitol St. over Anacostia River?

The structure is 1,445 ft (440.4 m) long with a longest span of 540 ft (164.6 m) and a deck 122 ft wide.

Who owns South Capitol St. over Anacostia River?

It is owned by the State Highway Agency.