US Bridges

Is 270 & Cd Rds over Watts Branch

Fair

Montgomery County, Maryland · 0.21 Mile North of Md 28 · Structure no. 100000150064020

Built
1955
70 years old, rebuilt 1988
Condition
Fair
inspected September 2024
Type
Culvert
Concrete
Length
28 ft
Daily traffic
239,460
2009 count
Owner
State
State Highway Agency

About this bridge

Is 270 & Cd Rds over Watts Branch is a concrete culvert carrying Is 270 & Cd Rds over Watts Branch in Montgomery County, Maryland. It was built in 1955 and reconstructed in 1988, 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 239,460 vehicles a day, roughly 8% of them trucks, projected to reach 330,700 by 2029. The structure is 28 ft (8.5 m) long. If it were closed, the detour would be 5 mi (8 km).

Location

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CarriesIs 270 & Cd Rds
CrossesWatts Branch
Location0.21 Mile North of Md 28
RouteInterstate 270
CountyMontgomery County
StateMaryland
Coordinates39.08885, -77.17395
Functional classUrban Principal Arterial - Interstate

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 protection8 Very GoodNo problems noted.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionSeptember 2024
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 rating110.1 US tons
Inventory rating63.5 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans0
Design loadHS 20
Structure length28 ft (8.5 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 traffic239,460 (2009)
Projected traffic330,700 by 2029
Trucks8%
Lanes on structure13
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed5 mi (8 km)
TollOn a free road
National Highway SystemYes
Strategic Highway NetworkInterstate STRAHNET route

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 Is 270 & Cd Rds over Watts Branch built?

It was built in 1955, making it 70 years old in 2025. It was reconstructed in 1988.

What condition is Is 270 & Cd Rds 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 September 2024.

How much traffic does Is 270 & Cd Rds over Watts Branch carry?

About 239,460 vehicles per day (2009 count), of which roughly 8% are trucks.

How long is Is 270 & Cd Rds over Watts Branch?

The structure is 28 ft (8.5 m) long with a longest span of 25 ft (7.6 m).

Who owns Is 270 & Cd Rds over Watts Branch?

It is owned by the State Highway Agency.