US Bridges

Prestley Rd. over SR 0079 NB SB

Fair

Allegheny County, Pennsylvania · 4400 N.W. of SR 0050 · Structure no. 000000000001748

Built
1967
58 years old, rebuilt 1986
Condition
Fair
inspected December 2023
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
284 ft
2 main spans
Daily traffic
5,806
2024 count
Owner
State
State Highway Agency

About this bridge

Prestley Rd. over SR 0079 NB SB is a prestressed concrete box beam or girders - multiple carrying Prestley Rd. over SR 0079 NB SB in Allegheny County, Pennsylvania. It was built in 1967 and reconstructed in 1986, so it is 58 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 5,806 vehicles a day, roughly 4% of them trucks, projected to reach 7,454 by 2032. The structure is 284 ft (86.6 m) long and 33 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

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CarriesPrestley Rd.
CrossesSR 0079 NB SB
Location4400 N.W. of SR 0050
RouteState Highway 0
CountyAllegheny County
StatePennsylvania
Coordinates40.37231, -80.11351
Functional classUrban Local

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.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionDecember 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 alignment5: Somewhat better than minimum adequacy to tolerate being left in place as is
Operating rating101 US tons
Inventory rating34 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans2 (+2 approach)
Design loadHS 20
Structure length284 ft (86.6 m)
Longest span87 ft (26.5 m)
Deck width33 ft (10.2 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic5,806 (2024)
Projected traffic7,454 by 2032
Trucks4%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed3.7 mi (6 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$192,000
NavigationNot applicable (no waterway)

Frequently asked questions

When was Prestley Rd. over SR 0079 NB SB built?

It was built in 1967, making it 58 years old in 2025. It was reconstructed in 1986.

What condition is Prestley Rd. over SR 0079 NB SB 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 December 2023.

How much traffic does Prestley Rd. over SR 0079 NB SB carry?

About 5,806 vehicles per day (2024 count), of which roughly 4% are trucks.

How long is Prestley Rd. over SR 0079 NB SB?

The structure is 284 ft (86.6 m) long with a longest span of 87 ft (26.5 m) and a deck 33 ft wide.

Who owns Prestley Rd. over SR 0079 NB SB?

It is owned by the State Highway Agency.