US Bridges

Greentree RD over Is 495

Fair

Montgomery County, Maryland · @ Is 495 · Structure no. 100000150113010

Built
1962
63 years old, rebuilt 1971
Condition
Fair
inspected August 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
238 ft
4 main spans
Daily traffic
8,600
1994 count
Owner
State
State Highway Agency

About this bridge

Greentree RD over Is 495 is a steel stringer/multi-beam or girder carrying Greentree RD over Is 495 in Montgomery County, Maryland. It was built in 1962 and reconstructed in 1971, so it is 63 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 5 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 8,600 vehicles a day, roughly 5% of them trucks, projected to reach 10,148 by 2012. The structure is 238 ft (72.5 m) long and 40 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

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CarriesGreentree RD
CrossesIs 495
Location@ Is 495
RouteCounty Highway 167
CountyMontgomery County
StateMaryland
Coordinates39.01297, -77.14474
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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionAugust 2024
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 alignment8: Equal to present desirable criteria
Operating rating75 US tons
Inventory rating45 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans4
Design loadH 20
Structure length238 ft (72.5 m)
Longest span74 ft (22.6 m)
Deck width40 ft (12.3 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic8,600 (1994)
Projected traffic10,148 by 2012
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesHighway
Detour if closed1.9 mi (3 km)
TollOn a free road
National Highway SystemNo

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$631,000
NavigationNot applicable (no waterway)

Frequently asked questions

When was Greentree RD over Is 495 built?

It was built in 1962, making it 63 years old in 2025. It was reconstructed in 1971.

What condition is Greentree RD over Is 495 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 2024.

How much traffic does Greentree RD over Is 495 carry?

About 8,600 vehicles per day (1994 count), of which roughly 5% are trucks.

How long is Greentree RD over Is 495?

The structure is 238 ft (72.5 m) long with a longest span of 74 ft (22.6 m) and a deck 40 ft wide.

Who owns Greentree RD over Is 495?

It is owned by the State Highway Agency.