US Bridges

Is 495 over Clara Barton Parkway EB

Fair

Montgomery County, Maryland · 0.34 Mile East of Va Line · Structure no. 100000150101010

Built
1963
62 years old, rebuilt 1991
Condition
Fair
inspected September 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
361 ft
4 main spans
Daily traffic
228,218
2023 count
Owner
State
State Highway Agency

About this bridge

Is 495 over Clara Barton Parkway EB is a steel stringer/multi-beam or girder carrying Is 495 over Clara Barton Parkway EB in Montgomery County, Maryland. It was built in 1963 and reconstructed in 1991, so it is 62 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 228,218 vehicles a day, roughly 7% of them trucks, projected to reach 351,521 by 2043. The structure is 361 ft (110 m) long and 157 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesIs 495
CrossesClara Barton Parkway EB
Location0.34 Mile East of Va Line
RouteInterstate 495
CountyMontgomery County
StateMaryland
Coordinates38.97292, -77.17925
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.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionSeptember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry9: Superior to present desirable criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating71 US tons
Inventory rating42 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20 + Mod
Structure length361 ft (110 m)
Longest span96 ft (29.3 m)
Deck width157 ft (48 m)
Roadway width154 ft (46.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic228,218 (2023)
Projected traffic351,521 by 2043
Trucks7%
Lanes on structure8
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway and waterway
Detour if closed1.2 mi (2 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 proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$3.8 million
NavigationNo navigation control on waterway

Frequently asked questions

When was Is 495 over Clara Barton Parkway EB built?

It was built in 1963, making it 62 years old in 2025. It was reconstructed in 1991.

What condition is Is 495 over Clara Barton Parkway EB 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 495 over Clara Barton Parkway EB carry?

About 228,218 vehicles per day (2023 count), of which roughly 7% are trucks.

How long is Is 495 over Clara Barton Parkway EB?

The structure is 361 ft (110 m) long with a longest span of 96 ft (29.3 m) and a deck 157 ft wide.

Who owns Is 495 over Clara Barton Parkway EB?

It is owned by the State Highway Agency.