US Bridges

Ramp D over 4th Ave Parking Lot

Fair

Allegheny County, Pennsylvania · Tarentum Bridge · Structure no. 000000000002901

Built
1952
73 years old, rebuilt 1986
Condition
Fair
inspected April 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
307 ft
4 main spans
Daily traffic
1,499
2024 count
Owner
State
State Highway Agency

About this bridge

Ramp D over 4th Ave Parking Lot is a steel stringer/multi-beam or girder carrying Ramp D over 4th Ave Parking Lot in Allegheny County, Pennsylvania. It was built in 1952 and reconstructed in 1986, so it is 73 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 1,499 vehicles a day, roughly 7% of them trucks, projected to reach 6,862 by 2032. The structure is 307 ft (93.6 m) long and 22 ft wide.

Location

Open in Google Maps
CarriesRamp D
Crosses4th Ave Parking Lot
LocationTarentum Bridge
RouteState Highway 0
CountyAllegheny County
StatePennsylvania
Coordinates40.60017, -79.75686
Functional classUrban Other Principal Arterial

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.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionApril 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 geometry4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating101 US tons
Inventory rating60 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20
Structure length307 ft (93.6 m)
Longest span82 ft (25 m)
Deck width22 ft (6.7 m)
Roadway width18 ft (5.5 m)
Vertical clearance over deck15 ft (4.5 m)

Traffic and service

Average daily traffic1,499 (2024)
Projected traffic6,862 by 2032
Trucks7%
Lanes on structure1
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed—
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 proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$219,000
NavigationNot applicable (no waterway)

Frequently asked questions

When was Ramp D over 4th Ave Parking Lot built?

It was built in 1952, making it 73 years old in 2025. It was reconstructed in 1986.

What condition is Ramp D over 4th Ave Parking Lot 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 April 2023.

How much traffic does Ramp D over 4th Ave Parking Lot carry?

About 1,499 vehicles per day (2024 count), of which roughly 7% are trucks.

How long is Ramp D over 4th Ave Parking Lot?

The structure is 307 ft (93.6 m) long with a longest span of 82 ft (25 m) and a deck 22 ft wide.

Who owns Ramp D over 4th Ave Parking Lot?

It is owned by the State Highway Agency.