US Bridges

Ramp a over I-376 WB Underpass

Fair

Allegheny County, Pennsylvania · At Int W/ Grant Street · Structure no. 000000000002912

Built
1958
67 years old
Condition
Fair
inspected May 2023
Type
Frame
Concrete
Length
38 ft
1 main span
Daily traffic
19,488
2024 count
Owner
State
State Highway Agency

About this bridge

Ramp a over I-376 WB Underpass is a concrete frame carrying Ramp a over I-376 WB Underpass in Allegheny County, Pennsylvania. It was built in 1958, so it is 67 years old, older than the Pennsylvania average of 54.8 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 19,488 vehicles a day, roughly 6% of them trucks, projected to reach 8,711 by 2032. The structure is 38 ft (11.6 m) long and 260 ft wide. If it were closed, the detour would be 9.9 mi (16 km).

Location

Open in Google Maps
CarriesRamp a
CrossesI-376 WB Underpass
LocationAt Int W/ Grant Street
RouteState Highway 0
CountyAllegheny County
StatePennsylvania
Coordinates40.43333, -79.98333
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.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMay 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry2: Basically intolerable, requiring high priority of replacement
Approach roadway alignment4: Meets minimum tolerable limits to be left in place as is
Operating rating54 US tons
Inventory rating36 US tons

Structure

Structure typeFrame
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length38 ft (11.6 m)
Longest span34 ft (10.4 m)
Deck width260 ft (79.2 m)
Roadway width18 ft (5.5 m)
Vertical clearance over deck15 ft (4.6 m)

Traffic and service

Average daily traffic19,488 (2024)
Projected traffic8,711 by 2032
Trucks6%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed9.9 mi (16 km)
TollOn a free road
National Highway SystemYes

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 Ramp a over I-376 WB Underpass built?

It was built in 1958, making it 67 years old in 2025.

What condition is Ramp a over I-376 WB Underpass 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 May 2023.

How much traffic does Ramp a over I-376 WB Underpass carry?

About 19,488 vehicles per day (2024 count), of which roughly 6% are trucks.

How long is Ramp a over I-376 WB Underpass?

The structure is 38 ft (11.6 m) long with a longest span of 34 ft (10.4 m) and a deck 260 ft wide.

Who owns Ramp a over I-376 WB Underpass?

It is owned by the State Highway Agency.