US Bridges

West Newton Road over SR 51

Fair

Allegheny County, Pennsylvania · @ County Line · Structure no. 000000000000960

Built
1959
66 years old
Condition
Fair
inspected May 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
151 ft
1 main span
Daily traffic
4,056
2024 count
Owner
State
State Highway Agency

About this bridge

West Newton Road over SR 51 is a steel stringer/multi-beam or girder carrying West Newton Road over SR 51 in Allegheny County, Pennsylvania. It was built in 1959, so it is 66 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 4,056 vehicles a day, roughly 7% of them trucks, projected to reach 5,349 by 2032. The structure is 151 ft (46 m) long and 45 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesWest Newton Road
CrossesSR 51
Location@ County Line
RouteState Highway 136
CountyAllegheny County
StatePennsylvania
Coordinates40.21693, -79.84305
Functional classRural Minor 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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
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 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 geometry6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating65 US tons
Inventory rating39 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1 (+2 approach)
Design loadHS 20
Structure length151 ft (46 m)
Longest span88 ft (26.8 m)
Deck width45 ft (13.7 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic4,056 (2024)
Projected traffic5,349 by 2032
Trucks7%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed1.9 mi (3 km)
TollOn a free road
National Highway SystemNo

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$307,000
NavigationNot applicable (no waterway)

Frequently asked questions

When was West Newton Road over SR 51 built?

It was built in 1959, making it 66 years old in 2025.

What condition is West Newton Road over SR 51 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 2024.

How much traffic does West Newton Road over SR 51 carry?

About 4,056 vehicles per day (2024 count), of which roughly 7% are trucks.

How long is West Newton Road over SR 51?

The structure is 151 ft (46 m) long with a longest span of 88 ft (26.8 m) and a deck 45 ft wide.

Who owns West Newton Road over SR 51?

It is owned by the State Highway Agency.