US Bridges

Is 270 Ramp over Unnamed Trib to Seneca C

Good

Montgomery County, Maryland · 1.0 Mile North of Md 124 · Structure no. 100000150201010

Built
2019
6 years old
Condition
Good
inspected August 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
282 ft
2 main spans
Daily traffic
—
2016 count
Owner
State
State Highway Agency

About this bridge

Is 270 Ramp over Unnamed Trib to Seneca C is a steel continuous stringer/multi-beam or girder carrying Is 270 Ramp over Unnamed Trib to Seneca C in Montgomery County, Maryland. It was built in 2019, so it is 6 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 8 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

No traffic count is recorded. The structure is 282 ft (86 m) long and 33 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

No coordinates are recorded for this structure.

CarriesIs 270 Ramp
CrossesUnnamed Trib to Seneca C
Location1.0 Mile North of Md 124
RouteInterstate 270
CountyMontgomery County
StateMaryland
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
Deck8 Very GoodNo problems noted.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionAugust 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation8: Equal to present desirable criteria
Deck geometry9: Superior to present desirable criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating59 US tons
Inventory rating44.6 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadUnknown
Structure length282 ft (86 m)
Longest span137 ft (41.8 m)
Deck width33 ft (10.1 m)
Roadway width29 ft (8.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic—
Projected traffic14,200 by 2036
Trucks0%
Lanes on structure1
Traffic directionOne-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.1 mi (5 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 over Unnamed Trib to Seneca C built?

It was built in 2019, making it 6 years old in 2025.

What condition is Is 270 Ramp over Unnamed Trib to Seneca C 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 August 2024.

How much traffic does Is 270 Ramp over Unnamed Trib to Seneca C carry?

No traffic count is recorded for this structure.

How long is Is 270 Ramp over Unnamed Trib to Seneca C?

The structure is 282 ft (86 m) long with a longest span of 137 ft (41.8 m) and a deck 33 ft wide.

Who owns Is 270 Ramp over Unnamed Trib to Seneca C?

It is owned by the State Highway Agency.