US Bridges

SR 4073 over SR 0056

PoorPosted for load

Westmoreland County, Pennsylvania · Allegheny Township · Structure no. 000000000036761

Built
1953
72 years old
Condition
Poor
inspected February 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
149 ft
3 main spans
Daily traffic
393
2024 count
Owner
State
State Highway Agency

About this bridge

SR 4073 over SR 0056 is a steel stringer/multi-beam or girder carrying SR 4073 over SR 0056 in Westmoreland County, Pennsylvania. It was built in 1953, so it is 72 years old, older than the Pennsylvania average of 54.8 years.

The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. Its operating status is: posted for load restriction.

It carries about 393 vehicles a day, roughly 19% of them trucks, projected to reach 508 by 2046. The structure is 149 ft (45.4 m) long and 32 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

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CarriesSR 4073
CrossesSR 0056
LocationAllegheny Township
RouteState Highway 0
CountyWestmoreland County
StatePennsylvania
Coordinates40.61875, -79.65401
Functional classUrban Collector

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

ComponentRatingMeaning
Deck4 PoorAdvanced section loss, deterioration, spalling or scour.
Superstructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Substructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Last inspectionFebruary 2024
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourBridge not over waterway
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry6: Equal to present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating30 US tons
Inventory rating18 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20 + Mod
Structure length149 ft (45.4 m)
Longest span81 ft (24.7 m)
Deck width32 ft (9.7 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic393 (2024)
Projected traffic508 by 2046
Trucks19%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed3.1 mi (5 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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$783,000
NavigationNot applicable (no waterway)

Frequently asked questions

When was SR 4073 over SR 0056 built?

It was built in 1953, making it 72 years old in 2025.

What condition is SR 4073 over SR 0056 in?

The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in February 2024.

How much traffic does SR 4073 over SR 0056 carry?

About 393 vehicles per day (2024 count), of which roughly 19% are trucks.

How long is SR 4073 over SR 0056?

The structure is 149 ft (45.4 m) long with a longest span of 81 ft (24.7 m) and a deck 32 ft wide.

Who owns SR 4073 over SR 0056?

It is owned by the State Highway Agency.