US Bridges

SR1002TILGHMAN/157 over Lehigh River Corman RR

Fair

Lehigh County, Pennsylvania · Tilghman St.Viaduct · Structure no. 000000000023217

Built
1929
96 years old, rebuilt 2022
Condition
Fair
inspected May 2024
Type
Arch - Deck
Concrete
Length
1,378 ft
12 main spans
Daily traffic
17,700
2024 count
Owner
State
State Highway Agency

About this bridge

SR1002TILGHMAN/157 over Lehigh River Corman RR is a concrete arch - deck carrying SR1002TILGHMAN/157 over Lehigh River Corman RR in Lehigh County, Pennsylvania. It was built in 1929 and reconstructed in 2022, so it is 96 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 17,700 vehicles a day, roughly 3% of them trucks, projected to reach 39,382 by 2032. The structure is 1,378 ft (420 m) long and 55 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesSR1002TILGHMAN/157
CrossesLehigh River Corman RR
LocationTilghman St.Viaduct
RouteState Highway 0
CountyLehigh County
StatePennsylvania
Coordinates40.61642, -75.45944
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
Deck8 Very GoodNo problems noted.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMay 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation6: Equal to present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating103 US tons
Inventory rating61.9 US tons

Structure

Structure typeArch - Deck
MaterialConcrete
DeckConcrete, cast-in-place
Main spans12
Design loadHS 20
Structure length1,378 ft (420 m)
Longest span185 ft (56.4 m)
Deck width55 ft (16.7 m)
Roadway width36 ft (11 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic17,700 (2024)
Projected traffic39,382 by 2032
Trucks3%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesHighway, waterway 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 statusEligible for the National Register of Historic Places
Work proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$6.7 million
NavigationNo navigation control on waterway

Frequently asked questions

When was SR1002TILGHMAN/157 over Lehigh River Corman RR built?

It was built in 1929, making it 96 years old in 2025. It was reconstructed in 2022.

What condition is SR1002TILGHMAN/157 over Lehigh River Corman RR 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 May 2024.

How much traffic does SR1002TILGHMAN/157 over Lehigh River Corman RR carry?

About 17,700 vehicles per day (2024 count), of which roughly 3% are trucks.

How long is SR1002TILGHMAN/157 over Lehigh River Corman RR?

The structure is 1,378 ft (420 m) long with a longest span of 185 ft (56.4 m) and a deck 55 ft wide.

Who owns SR1002TILGHMAN/157 over Lehigh River Corman RR?

It is owned by the State Highway Agency.