US Bridges

Is 270 Ramp C(5) over Is 370 & Ramp B

Good

Montgomery County, Maryland · 1.53 Mile South of Md 117 · Structure no. 100000150158010

Built
1988
37 years old
Condition
Good
inspected October 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
313 ft
2 main spans
Daily traffic
15,251
2006 count
Owner
State
State Highway Agency

About this bridge

Is 270 Ramp C(5) over Is 370 & Ramp B is a steel continuous stringer/multi-beam or girder carrying Is 270 Ramp C(5) over Is 370 & Ramp B in Montgomery County, Maryland. It was built in 1988, so it is 37 years old, younger than the Maryland average of 52.6 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 15,251 vehicles a day, roughly 8% of them trucks, projected to reach 16,471 by 2026. The structure is 313 ft (95.4 m) long and 45 ft wide.

Location

Open in Google Maps
CarriesIs 270 Ramp C(5)
CrossesIs 370 & Ramp B
Location1.53 Mile South of Md 117
RouteInterstate 270
CountyMontgomery County
StateMaryland
Coordinates39.1217, -77.19913
Functional classUrban Principal Arterial - Interstate

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Last inspectionOctober 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating83.4 US tons
Inventory rating50 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20 + Mod
Structure length313 ft (95.4 m)
Longest span180 ft (54.9 m)
Deck width45 ft (13.7 m)
Roadway width41 ft (12.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic15,251 (2006)
Projected traffic16,471 by 2026
Trucks8%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed—
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(5) over Is 370 & Ramp B built?

It was built in 1988, making it 37 years old in 2025.

What condition is Is 270 Ramp C(5) over Is 370 & Ramp B in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in October 2024.

How much traffic does Is 270 Ramp C(5) over Is 370 & Ramp B carry?

About 15,251 vehicles per day (2006 count), of which roughly 8% are trucks.

How long is Is 270 Ramp C(5) over Is 370 & Ramp B?

The structure is 313 ft (95.4 m) long with a longest span of 180 ft (54.9 m) and a deck 45 ft wide.

Who owns Is 270 Ramp C(5) over Is 370 & Ramp B?

It is owned by the State Highway Agency.