US Bridges

Tarentum Br Rmp.B over NS RR 4th Ave Ross ST

Fair

Allegheny County, Pennsylvania · Tarentum Bridge · Structure no. 000000000001109

Built
1952
73 years old, rebuilt 2021
Condition
Fair
inspected April 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
612 ft
8 main spans
Daily traffic
18,458
2024 count
Owner
State
State Highway Agency

About this bridge

Tarentum Br Rmp.B over NS RR 4th Ave Ross ST is a steel stringer/multi-beam or girder carrying Tarentum Br Rmp.B over NS RR 4th Ave Ross ST in Allegheny County, Pennsylvania. It was built in 1952 and reconstructed in 2021, 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 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 18,458 vehicles a day, roughly 2% of them trucks, projected to reach 12,642 by 2032. The structure is 612 ft (186.5 m) long and 38 ft wide.

Location

Open in Google Maps
CarriesTarentum Br Rmp.B
CrossesNS RR 4th Ave Ross ST
LocationTarentum Bridge
RouteState Highway 366
CountyAllegheny County
StatePennsylvania
Coordinates40.595, -79.75333
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
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionApril 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Approach roadway alignment8: Equal to present desirable criteria
Operating rating78 US tons
Inventory rating47 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans8
Design loadHS 20
Structure length612 ft (186.5 m)
Longest span82 ft (25 m)
Deck width38 ft (11.5 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deck17 ft (5.3 m)

Traffic and service

Average daily traffic18,458 (2024)
Projected traffic12,642 by 2032
Trucks2%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway and pedestrian
CrossesHighway and railroad
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$707,000
NavigationNot applicable (no waterway)

Frequently asked questions

When was Tarentum Br Rmp.B over NS RR 4th Ave Ross ST built?

It was built in 1952, making it 73 years old in 2025. It was reconstructed in 2021.

What condition is Tarentum Br Rmp.B over NS RR 4th Ave Ross ST 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 Tarentum Br Rmp.B over NS RR 4th Ave Ross ST carry?

About 18,458 vehicles per day (2024 count), of which roughly 2% are trucks.

How long is Tarentum Br Rmp.B over NS RR 4th Ave Ross ST?

The structure is 612 ft (186.5 m) long with a longest span of 82 ft (25 m) and a deck 38 ft wide.

Who owns Tarentum Br Rmp.B over NS RR 4th Ave Ross ST?

It is owned by the State Highway Agency.