US Bridges

Elizabeth Bridge over SR837 2001 CSX NS Mon Ri

Fair

Allegheny County, Pennsylvania · Elizabeth Bridge · Structure no. 000000000000712

Built
1951
74 years old, rebuilt 2020
Condition
Fair
inspected April 2023
Type
Truss - Thru
Steel Continuous
Length
1,502 ft
3 main spans
Daily traffic
31,260
2024 count
Owner
State
State Highway Agency

About this bridge

Elizabeth Bridge over SR837 2001 CSX NS Mon Ri is a steel continuous truss - thru carrying Elizabeth Bridge over SR837 2001 CSX NS Mon Ri in Allegheny County, Pennsylvania. It was built in 1951 and reconstructed in 2020, 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 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 31,260 vehicles a day, roughly 6% of them trucks, projected to reach 33,630 by 2032. The structure is 1,502 ft (457.8 m) long and 57 ft wide. If it were closed, the detour would be 11.2 mi (18 km).

Location

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CarriesElizabeth Bridge
CrossesSR837 2001 CSX NS Mon Ri
LocationElizabeth Bridge
RouteState Highway 51
CountyAllegheny County
StatePennsylvania
Coordinates40.27512, -79.88815
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionApril 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment5: Somewhat better than minimum adequacy to tolerate being left in place as is
Operating rating79 US tons
Inventory rating46 US tons

Structure

Structure typeTruss - Thru
MaterialSteel Continuous
DeckClosed grating
Main spans3 (+13 approach)
Design loadHS 20
Structure length1,502 ft (457.8 m)
Longest span450 ft (137.2 m)
Deck width57 ft (17.4 m)
Roadway width53 ft (16.3 m)
Vertical clearance over deck19 ft (5.6 m)

Traffic and service

Average daily traffic31,260 (2024)
Projected traffic33,630 by 2032
Trucks6%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesHighway, waterway and railroad
Detour if closed11.2 mi (18 km)
TollOn a free road
National Highway SystemYes

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusEligible for the National Register of Historic Places
Work proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$9.8 million
NavigationNavigation control on waterway (bridge permit required)

Frequently asked questions

When was Elizabeth Bridge over SR837 2001 CSX NS Mon Ri built?

It was built in 1951, making it 74 years old in 2025. It was reconstructed in 2020.

What condition is Elizabeth Bridge over SR837 2001 CSX NS Mon Ri 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 Elizabeth Bridge over SR837 2001 CSX NS Mon Ri carry?

About 31,260 vehicles per day (2024 count), of which roughly 6% are trucks.

How long is Elizabeth Bridge over SR837 2001 CSX NS Mon Ri?

The structure is 1,502 ft (457.8 m) long with a longest span of 450 ft (137.2 m) and a deck 57 ft wide.

Who owns Elizabeth Bridge over SR837 2001 CSX NS Mon Ri?

It is owned by the State Highway Agency.