US Bridges

Massachusetts Ave over Rock Creek &pot Park

Fair

District of Columbia, District of Columbia · Mass Ave over Rock CREE5 · Structure no. 0114

Built
1939
86 years old, rebuilt 1998
Condition
Fair
inspected November 2020
Type
Arch - Deck
Concrete Continuous
Length
386 ft
1 main span
Daily traffic
33,100
2007 count
Owner
State
State Highway Agency

About this bridge

Massachusetts Ave over Rock Creek &pot Park is a concrete continuous arch - deck carrying Massachusetts Ave over Rock Creek &pot Park in District of Columbia, District of Columbia. It was built in 1939 and reconstructed in 1998, so it is 86 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 33,100 vehicles a day, roughly 3% of them trucks, projected to reach 35,000 by 2027. The structure is 386 ft (117.7 m) long and 74 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesMassachusetts Ave
CrossesRock Creek &pot Park
LocationMass Ave over Rock CREE5
RouteCity Street 0
CountyDistrict of Columbia
StateDistrict of Columbia
Coordinates38.91731, -77.05766
Functional classUrban Other Principal Arterial

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.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionNovember 2020
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation6: Equal to present minimum criteria
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating66 US tons
Inventory rating39 US tons

Structure

Structure typeArch - Deck
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans1 (+8 approach)
Design loadH 20
Structure length386 ft (117.7 m)
Longest span189 ft (57.6 m)
Deck width74 ft (22.6 m)
Roadway width50 ft (15.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic33,100 (2007)
Projected traffic35,000 by 2027
Trucks3%
Lanes on structure5
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesHighway and waterway
Detour if closed1.9 mi (3 km)
TollOn a free road
National Highway SystemYes

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusPossibly eligible for the National Register; requires further investigation
Work proposedOther structural work, including hydraulic replacements
Estimated improvement cost$7.5 million
NavigationNo navigation control on waterway

Frequently asked questions

When was Massachusetts Ave over Rock Creek &pot Park built?

It was built in 1939, making it 86 years old in 2025. It was reconstructed in 1998.

What condition is Massachusetts Ave over Rock Creek &pot Park 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 November 2020.

How much traffic does Massachusetts Ave over Rock Creek &pot Park carry?

About 33,100 vehicles per day (2007 count), of which roughly 3% are trucks.

How long is Massachusetts Ave over Rock Creek &pot Park?

The structure is 386 ft (117.7 m) long with a longest span of 189 ft (57.6 m) and a deck 74 ft wide.

Who owns Massachusetts Ave over Rock Creek &pot Park?

It is owned by the State Highway Agency.