US Bridges

SR 28 NB over Lexington & Delafield

Fair

Allegheny County, Pennsylvania · O/Delafield & Lexington · Structure no. 000000000000615

Built
1965
60 years old, rebuilt 2023
Condition
Fair
inspected June 2023
Type
Box Beam or Girders - Multiple
Prestressed Concrete Continuous
Length
313 ft
5 main spans
Daily traffic
41,487
2024 count
Owner
State
State Highway Agency

About this bridge

SR 28 NB over Lexington & Delafield is a prestressed concrete continuous box beam or girders - multiple carrying SR 28 NB over Lexington & Delafield in Allegheny County, Pennsylvania. It was built in 1965 and reconstructed in 2023, so it is 60 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 41,487 vehicles a day, roughly 6% of them trucks, projected to reach 27,659 by 2032. The structure is 313 ft (95.4 m) long and 45 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesSR 28 NB
CrossesLexington & Delafield
LocationO/Delafield & Lexington
RouteState Highway 28
CountyAllegheny County
StatePennsylvania
Coordinates40.49246, -79.89677
Functional classUrban Principal Arterial - Other Freeway or Expressway

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 inspectionJune 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating51 US tons
Inventory rating36 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans5
Design loadHS 20
Structure length313 ft (95.4 m)
Longest span75 ft (22.9 m)
Deck width45 ft (13.8 m)
Roadway width35 ft (10.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic41,487 (2024)
Projected traffic27,659 by 2032
Trucks6%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed1.2 mi (2 km)
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$399,000
NavigationNot applicable (no waterway)

Frequently asked questions

When was SR 28 NB over Lexington & Delafield built?

It was built in 1965, making it 60 years old in 2025. It was reconstructed in 2023.

What condition is SR 28 NB over Lexington & Delafield 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 June 2023.

How much traffic does SR 28 NB over Lexington & Delafield carry?

About 41,487 vehicles per day (2024 count), of which roughly 6% are trucks.

How long is SR 28 NB over Lexington & Delafield?

The structure is 313 ft (95.4 m) long with a longest span of 75 ft (22.9 m) and a deck 45 ft wide.

Who owns SR 28 NB over Lexington & Delafield?

It is owned by the State Highway Agency.