US Bridges

Westlake Terrace-F over I-270

Fair

Montgomery County, Maryland · 1 MI N of Democracy Blvd · Structure no. 200000M-0247010

Built
1994
31 years old, rebuilt 2004
Condition
Fair
inspected August 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
365 ft
3 main spans
Daily traffic
13,584
2022 count
Owner
County
County Highway Agency

About this bridge

Westlake Terrace-F over I-270 is a steel continuous stringer/multi-beam or girder carrying Westlake Terrace-F over I-270 in Montgomery County, Maryland. It was built in 1994 and reconstructed in 2004, so it is 31 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 13,584 vehicles a day, roughly 5% of them trucks, projected to reach 15,620 by 2042. The structure is 365 ft (111.3 m) long and 81 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesWestlake Terrace-F
CrossesI-270
Location1 MI N of Democracy Blvd
RouteCounty Highway 3438
CountyMontgomery County
StateMaryland
Coordinates39.02634, -77.14246
Functional classUrban Local

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionAugust 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment6: Equal to present minimum criteria
Operating rating84 US tons
Inventory rating50.5 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 25 or greater
Structure length365 ft (111.3 m)
Longest span143 ft (43.6 m)
Deck width81 ft (24.8 m)
Roadway width65 ft (19.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic13,584 (2022)
Projected traffic15,620 by 2042
Trucks5%
Lanes on structure5
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesHighway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty 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 Westlake Terrace-F over I-270 built?

It was built in 1994, making it 31 years old in 2025. It was reconstructed in 2004.

What condition is Westlake Terrace-F over I-270 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 August 2023.

How much traffic does Westlake Terrace-F over I-270 carry?

About 13,584 vehicles per day (2022 count), of which roughly 5% are trucks.

How long is Westlake Terrace-F over I-270?

The structure is 365 ft (111.3 m) long with a longest span of 143 ft (43.6 m) and a deck 81 ft wide.

Who owns Westlake Terrace-F over I-270?

It is owned by the County Highway Agency.