US Bridges

NB Bypass over Railroad Property

Fair

Allegheny County, Pennsylvania · At Mckeesport-Duqesne · Structure no. 000000000002869

Built
1970
55 years old, rebuilt 1988
Condition
Fair
inspected July 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
262 ft
4 main spans
Daily traffic
1,623
2024 count
Owner
State
State Highway Agency

About this bridge

NB Bypass over Railroad Property is a prestressed concrete stringer/multi-beam or girder carrying NB Bypass over Railroad Property in Allegheny County, Pennsylvania. It was built in 1970 and reconstructed in 1988, so it is 55 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 1,623 vehicles a day, roughly 7% of them trucks, projected to reach 5,420 by 2032. The structure is 262 ft (79.9 m) long and 23 ft wide.

Location

Open in Google Maps
CarriesNB Bypass
CrossesRailroad Property
LocationAt Mckeesport-Duqesne
RouteState Highway 0
CountyAllegheny County
StatePennsylvania
Coordinates40.35946, -79.8469
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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionJuly 2024
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 alignment7: Better than present minimum criteria
Operating rating63.1 US tons
Inventory rating38 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20
Structure length262 ft (79.9 m)
Longest span65 ft (19.8 m)
Deck width23 ft (7.1 m)
Roadway width21 ft (6.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,623 (2024)
Projected traffic5,420 by 2032
Trucks7%
Lanes on structure1
Traffic directionOne-way traffic
CarriesHighway
CrossesOther
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$241,000
NavigationNot applicable (no waterway)

Frequently asked questions

When was NB Bypass over Railroad Property built?

It was built in 1970, making it 55 years old in 2025. It was reconstructed in 1988.

What condition is NB Bypass over Railroad Property 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 2024.

How much traffic does NB Bypass over Railroad Property carry?

About 1,623 vehicles per day (2024 count), of which roughly 7% are trucks.

How long is NB Bypass over Railroad Property?

The structure is 262 ft (79.9 m) long with a longest span of 65 ft (19.8 m) and a deck 23 ft wide.

Who owns NB Bypass over Railroad Property?

It is owned by the State Highway Agency.