US Bridges

South Waterside DR over Rock Creek Parkway (nb)

Fair

District of Columbia, District of Columbia · 0.4 Miles from P Street. · Structure no. 3450034P0000000

Built
1940
85 years old
Condition
Fair
inspected July 2023
Type
Tee Beam
Concrete
Length
85 ft
1 main span
Daily traffic
15,152
2019 count
Owner
Federal
National Park Service

About this bridge

South Waterside DR over Rock Creek Parkway (nb) is a concrete tee beam carrying South Waterside DR over Rock Creek Parkway (nb) in District of Columbia, District of Columbia. It was built in 1940, so it is 85 years old, older 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 15,152 vehicles a day, roughly 1% of them trucks, projected to reach 18,182 by 2039. The structure is 85 ft (25.9 m) long and 39 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesSouth Waterside DR
CrossesRock Creek Parkway (nb)
Location0.4 Miles from P Street.
RouteFederal Lands Road 510
CountyDistrict of Columbia
StateDistrict of Columbia
Coordinates38.91376, -77.05499
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
Deck7 GoodSome minor problems.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Last inspectionJuly 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry2: Basically intolerable, requiring high priority of replacement
Approach roadway alignment3: Basically intolerable, requiring high priority of corrective action
Operating rating42 US tons
Inventory rating25 US tons

Structure

Structure typeTee Beam
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1 (+2 approach)
Design loadUnknown
Structure length85 ft (25.9 m)
Longest span52 ft (16 m)
Deck width39 ft (12 m)
Roadway width25 ft (7.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic15,152 (2019)
Projected traffic18,182 by 2039
Trucks1%
Lanes on structure2
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

OwnerNational Park Service
Maintained byNational Park Service
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost$29,000 (2023 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was South Waterside DR over Rock Creek Parkway (nb) built?

It was built in 1940, making it 85 years old in 2025.

What condition is South Waterside DR over Rock Creek Parkway (nb) 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 South Waterside DR over Rock Creek Parkway (nb) carry?

About 15,152 vehicles per day (2019 count), of which roughly 1% are trucks.

How long is South Waterside DR over Rock Creek Parkway (nb)?

The structure is 85 ft (25.9 m) long with a longest span of 52 ft (16 m) and a deck 39 ft wide.

Who owns South Waterside DR over Rock Creek Parkway (nb)?

It is owned by the National Park Service.