US Bridges

Is 270 Ramp C over Is 270Y Ramps B & B3

Fair

Montgomery County, Maryland · 0.85 Mile North of Md 187 · Structure no. 100000150082010

Built
1958
67 years old, rebuilt 1990
Condition
Fair
inspected September 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
299 ft
1 main span
Daily traffic
130,450
2009 count
Owner
State
State Highway Agency

About this bridge

Is 270 Ramp C over Is 270Y Ramps B & B3 is a steel stringer/multi-beam or girder carrying Is 270 Ramp C over Is 270Y Ramps B & B3 in Montgomery County, Maryland. It was built in 1958 and reconstructed in 1990, so it is 67 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 130,450 vehicles a day, roughly 8% of them trucks, projected to reach 67,976 by 2026. The structure is 299 ft (91.1 m) long and 62 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
CarriesIs 270 Ramp C
CrossesIs 270Y Ramps B & B3
Location0.85 Mile North of Md 187
RouteInterstate 270
CountyMontgomery County
StateMaryland
Coordinates39.03412, -77.14283
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionSeptember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry7: Better than present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating78.5 US tons
Inventory rating47 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1 (+2 approach)
Design loadHS 20
Structure length299 ft (91.1 m)
Longest span120 ft (36.6 m)
Deck width62 ft (18.8 m)
Roadway width58 ft (17.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic130,450 (2009)
Projected traffic67,976 by 2026
Trucks8%
Lanes on structure3
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed3.7 mi (6 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—
NavigationNot applicable (no waterway)

Frequently asked questions

When was Is 270 Ramp C over Is 270Y Ramps B & B3 built?

It was built in 1958, making it 67 years old in 2025. It was reconstructed in 1990.

What condition is Is 270 Ramp C over Is 270Y Ramps B & B3 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 2023.

How much traffic does Is 270 Ramp C over Is 270Y Ramps B & B3 carry?

About 130,450 vehicles per day (2009 count), of which roughly 8% are trucks.

How long is Is 270 Ramp C over Is 270Y Ramps B & B3?

The structure is 299 ft (91.1 m) long with a longest span of 120 ft (36.6 m) and a deck 62 ft wide.

Who owns Is 270 Ramp C over Is 270Y Ramps B & B3?

It is owned by the State Highway Agency.