US Bridges

Is 270 over Gr Seneca CR & Game Pre

Fair

Montgomery County, Maryland · 1.17 Miles N of Md 124 · Structure no. 100000150043010

Built
1954
71 years old, rebuilt 1989
Condition
Fair
inspected July 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
231 ft
3 main spans
Daily traffic
154,247
2009 count
Owner
State
State Highway Agency

About this bridge

Is 270 over Gr Seneca CR & Game Pre is a steel stringer/multi-beam or girder carrying Is 270 over Gr Seneca CR & Game Pre in Montgomery County, Maryland. It was built in 1954 and reconstructed in 1989, so it is 71 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 154,247 vehicles a day, roughly 8% of them trucks, projected to reach 172,459 by 2026. The structure is 231 ft (70.4 m) long and 146 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

Open in Google Maps
CarriesIs 270
CrossesGr Seneca CR & Game Pre
Location1.17 Miles N of Md 124
RouteInterstate 270
CountyMontgomery County
StateMaryland
Coordinates39.16075, -77.23198
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
Deck7 GoodSome minor problems.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionJuly 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 adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating74.5 US tons
Inventory rating44.5 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length231 ft (70.4 m)
Longest span85 ft (25.9 m)
Deck width146 ft (44.5 m)
Roadway width140 ft (42.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic154,247 (2009)
Projected traffic172,459 by 2026
Trucks8%
Lanes on structure8
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway and waterway
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 proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$2.2 million
NavigationNo navigation control on waterway

Frequently asked questions

When was Is 270 over Gr Seneca CR & Game Pre built?

It was built in 1954, making it 71 years old in 2025. It was reconstructed in 1989.

What condition is Is 270 over Gr Seneca CR & Game Pre 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 July 2023.

How much traffic does Is 270 over Gr Seneca CR & Game Pre carry?

About 154,247 vehicles per day (2009 count), of which roughly 8% are trucks.

How long is Is 270 over Gr Seneca CR & Game Pre?

The structure is 231 ft (70.4 m) long with a longest span of 85 ft (25.9 m) and a deck 146 ft wide.

Who owns Is 270 over Gr Seneca CR & Game Pre?

It is owned by the State Highway Agency.