US Bridges

Md 28 & Ramp 6 over Watts Branch

Fair

Montgomery County, Maryland · 0.18 Mile West of Is 270 · Structure no. 100000150005020

Built
1955
70 years old
Condition
Fair
inspected August 2024
Type
Culvert
Concrete
Length
25 ft
Daily traffic
47,601
2013 count
Owner
State
State Highway Agency

About this bridge

Md 28 & Ramp 6 over Watts Branch is a concrete culvert carrying Md 28 & Ramp 6 over Watts Branch in Montgomery County, Maryland. It was built in 1955, so it is 70 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 47,601 vehicles a day, roughly 8% of them trucks, projected to reach 57,558 by 2026. The structure is 25 ft (7.6 m) long. If it were closed, the detour would be 5 mi (8 km).

Location

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CarriesMd 28 & Ramp 6
CrossesWatts Branch
Location0.18 Mile West of Is 270
RouteState Highway 28
CountyMontgomery County
StateMaryland
Coordinates39.08702, -77.17616
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
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionAugust 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Waterway adequacy6: Equal to present minimum 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 length25 ft (7.6 m)
Longest span25 ft (7.6 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic47,601 (2013)
Projected traffic57,558 by 2026
Trucks8%
Lanes on structure5
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed5 mi (8 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 Md 28 & Ramp 6 over Watts Branch built?

It was built in 1955, making it 70 years old in 2025.

What condition is Md 28 & Ramp 6 over Watts Branch 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 2024.

How much traffic does Md 28 & Ramp 6 over Watts Branch carry?

About 47,601 vehicles per day (2013 count), of which roughly 8% are trucks.

How long is Md 28 & Ramp 6 over Watts Branch?

The structure is 25 ft (7.6 m) long with a longest span of 25 ft (7.6 m).

Who owns Md 28 & Ramp 6 over Watts Branch?

It is owned by the State Highway Agency.