US Bridges

Clara Barton Parkw over Cabin John Creek & Cabin

Fair

Montgomery County, Maryland · 1.6 Miles South of I-495. · Structure no. 3300033P0000000

Built
1963
62 years old, rebuilt 1985
Condition
Fair
inspected April 2023
Type
Box Beam or Girders - Multiple
Concrete Continuous
Length
378 ft
3 main spans
Daily traffic
16,120
2022 count
Owner
Federal
National Park Service

About this bridge

Clara Barton Parkw over Cabin John Creek & Cabin is a concrete continuous box beam or girders - multiple carrying Clara Barton Parkw over Cabin John Creek & Cabin in Montgomery County, Maryland. It was built in 1963 and reconstructed in 1985, so it is 62 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 16,120 vehicles a day, roughly 1% of them trucks, projected to reach 19,344 by 2042. The structure is 378 ft (115.2 m) long and 72 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

CarriesClara Barton Parkw
CrossesCabin John Creek & Cabin
Location1.6 Miles South of I-495.
RouteFederal Lands Road 6
Coordinates38.97089, -77.14703
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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionApril 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating36 US tons
Inventory rating22 US tons

Structure

MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadH 20
Structure length378 ft (115.2 m)
Longest span150 ft (45.7 m)
Deck width72 ft (21.8 m)
Roadway width60 ft (18.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic16,120 (2022)
Projected traffic19,344 by 2042
Trucks1%
Lanes on structure4
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

OwnerNational Park Service
Maintained byNational Park Service
Historic statusNot eligible for the National Register of Historic Places
Work proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$698,000 (2021 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Clara Barton Parkw over Cabin John Creek & Cabin built?

It was built in 1963, making it 62 years old in 2025. It was reconstructed in 1985.

What condition is Clara Barton Parkw over Cabin John Creek & Cabin 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 April 2023.

How much traffic does Clara Barton Parkw over Cabin John Creek & Cabin carry?

About 16,120 vehicles per day (2022 count), of which roughly 1% are trucks.

How long is Clara Barton Parkw over Cabin John Creek & Cabin?

The structure is 378 ft (115.2 m) long with a longest span of 150 ft (45.7 m) and a deck 72 ft wide.

Who owns Clara Barton Parkw over Cabin John Creek & Cabin?

It is owned by the National Park Service.