US Bridges

Liberty ST over Mahoning River

Good

Lawrence County, Pennsylvania · City of New Castle · Structure no. 000000000022181

Built
1960
65 years old, rebuilt 2010
Condition
Good
inspected September 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
500 ft
4 main spans
Daily traffic
3,502
2024 count
Owner
State
State Highway Agency

About this bridge

Liberty ST over Mahoning River is a steel continuous stringer/multi-beam or girder carrying Liberty ST over Mahoning River in Lawrence County, Pennsylvania. It was built in 1960 and reconstructed in 2010, so it is 65 years old, older than the Pennsylvania average of 54.8 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 3,502 vehicles a day, roughly 11% of them trucks, projected to reach 5,573 by 2032. The structure is 500 ft (152.4 m) long and 34 ft wide. If it were closed, the detour would be 6.8 mi (11 km).

Location

Open in Google Maps
CarriesLiberty ST
CrossesMahoning River
LocationCity of New Castle
RouteState Highway 18
CountyLawrence County
StatePennsylvania
Coordinates40.96365, -80.38237
Functional classUrban Other Principal Arterial

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck8 Very GoodNo problems noted.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionSeptember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation7: Better than present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating69 US tons
Inventory rating42 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20
Structure length500 ft (152.4 m)
Longest span145 ft (44.2 m)
Deck width34 ft (10.3 m)
Roadway width30 ft (9.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,502 (2024)
Projected traffic5,573 by 2032
Trucks11%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.8 mi (11 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$2.8 million
NavigationNo navigation control on waterway

Frequently asked questions

When was Liberty ST over Mahoning River built?

It was built in 1960, making it 65 years old in 2025. It was reconstructed in 2010.

What condition is Liberty ST over Mahoning River in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in September 2024.

How much traffic does Liberty ST over Mahoning River carry?

About 3,502 vehicles per day (2024 count), of which roughly 11% are trucks.

How long is Liberty ST over Mahoning River?

The structure is 500 ft (152.4 m) long with a longest span of 145 ft (44.2 m) and a deck 34 ft wide.

Who owns Liberty ST over Mahoning River?

It is owned by the State Highway Agency.