US Bridges

SR 51 S.B. over Nssr Local Rd.

Fair

Allegheny County, Pennsylvania · Elizabeth Bridge · Structure no. 000000000045329

Built
1951
74 years old, rebuilt 1985
Condition
Fair
inspected April 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
442 ft
8 main spans
Daily traffic
14,907
2024 count
Owner
State
State Highway Agency

About this bridge

SR 51 S.B. over Nssr Local Rd. is a steel stringer/multi-beam or girder carrying SR 51 S.B. over Nssr Local Rd. in Allegheny County, Pennsylvania. It was built in 1951 and reconstructed in 1985, so it is 74 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 14,907 vehicles a day, roughly 6% of them trucks, projected to reach 16,459 by 2032. The structure is 442 ft (134.7 m) long and 32 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesSR 51 S.B.
CrossesNssr Local Rd.
LocationElizabeth Bridge
RouteState Highway 51
CountyAllegheny County
StatePennsylvania
Coordinates40.27613, -79.89066
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
Deck7 GoodSome minor problems.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionApril 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Approach roadway alignment5: Somewhat better than minimum adequacy to tolerate being left in place as is
Operating rating107 US tons
Inventory rating64 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans8
Design loadHS 20
Structure length442 ft (134.7 m)
Longest span68 ft (20.7 m)
Deck width32 ft (9.8 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic14,907 (2024)
Projected traffic16,459 by 2032
Trucks6%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway and railroad
Detour if closed1.9 mi (3 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 proposedNone recorded
Estimated improvement cost—
NavigationNot applicable (no waterway)

Frequently asked questions

When was SR 51 S.B. over Nssr Local Rd. built?

It was built in 1951, making it 74 years old in 2025. It was reconstructed in 1985.

What condition is SR 51 S.B. over Nssr Local Rd. 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 April 2023.

How much traffic does SR 51 S.B. over Nssr Local Rd. carry?

About 14,907 vehicles per day (2024 count), of which roughly 6% are trucks.

How long is SR 51 S.B. over Nssr Local Rd.?

The structure is 442 ft (134.7 m) long with a longest span of 68 ft (20.7 m) and a deck 32 ft wide.

Who owns SR 51 S.B. over Nssr Local Rd.?

It is owned by the State Highway Agency.