US Bridges

Clara Barton Pkwy over Rock Run

Fair

Montgomery County, Maryland · W of Interchange · Structure no. 100000150102020

Built
1963
62 years old
Condition
Fair
inspected August 2023
Type
Culvert
Concrete
Length
510 ft
Daily traffic
13,090
2009 count
Owner
State
State Highway Agency

About this bridge

Clara Barton Pkwy over Rock Run is a concrete culvert carrying Clara Barton Pkwy over Rock Run in Montgomery County, Maryland. It was built in 1963, 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 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 13,090 vehicles a day, roughly 8% of them trucks, projected to reach 19,635 by 2029. The structure is 510 ft (155.4 m) long. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesClara Barton Pkwy
CrossesRock Run
LocationW of Interchange
RouteFederal Lands Road 6
CountyMontgomery County
StateMaryland
Coordinates38.97126, -77.1569
Functional classUrban Principal Arterial - Other Freeway or Expressway

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionAugust 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating36 US tons
Inventory rating36 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans0
Design loadHS 20
Structure length510 ft (155.4 m)
Longest span10 ft (3 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic13,090 (2009)
Projected traffic19,635 by 2029
Trucks8%
Lanes on structure6
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
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 Clara Barton Pkwy over Rock Run built?

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

What condition is Clara Barton Pkwy over Rock Run 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 2023.

How much traffic does Clara Barton Pkwy over Rock Run carry?

About 13,090 vehicles per day (2009 count), of which roughly 8% are trucks.

How long is Clara Barton Pkwy over Rock Run?

The structure is 510 ft (155.4 m) long with a longest span of 10 ft (3 m).

Who owns Clara Barton Pkwy over Rock Run?

It is owned by the State Highway Agency.