US Bridges

Is 495 Ol over Is 270Y

Fair

Montgomery County, Maryland · 0.26 Mile East of Md 191 · Structure no. 100000150112010

Built
1996
29 years old
Condition
Fair
inspected March 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
306 ft
2 main spans
Daily traffic
115,850
2009 count
Owner
State
State Highway Agency

About this bridge

Is 495 Ol over Is 270Y is a steel continuous stringer/multi-beam or girder carrying Is 495 Ol over Is 270Y in Montgomery County, Maryland. It was built in 1996, so it is 29 years old, younger 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 115,850 vehicles a day, roughly 8% of them trucks, projected to reach 132,850 by 2029. The structure is 306 ft (93.3 m) long and 62 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

Open in Google Maps
CarriesIs 495 Ol
CrossesIs 270Y
Location0.26 Mile East of Md 191
RouteInterstate 495
CountyMontgomery County
StateMaryland
Coordinates39.01298, -77.14923
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.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMarch 2024
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 rating110.1 US tons
Inventory rating76.9 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 25 or greater
Structure length306 ft (93.3 m)
Longest span158 ft (48.2 m)
Deck width62 ft (18.9 m)
Roadway width58 ft (17.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic115,850 (2009)
Projected traffic132,850 by 2029
Trucks8%
Lanes on structure3
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
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—
NavigationNot applicable (no waterway)

Frequently asked questions

When was Is 495 Ol over Is 270Y built?

It was built in 1996, making it 29 years old in 2025.

What condition is Is 495 Ol over Is 270Y 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 March 2024.

How much traffic does Is 495 Ol over Is 270Y carry?

About 115,850 vehicles per day (2009 count), of which roughly 8% are trucks.

How long is Is 495 Ol over Is 270Y?

The structure is 306 ft (93.3 m) long with a longest span of 158 ft (48.2 m) and a deck 62 ft wide.

Who owns Is 495 Ol over Is 270Y?

It is owned by the State Highway Agency.