US Bridges

Pa Tpk (I-476) over SR 0029 LR158

Fair

Lehigh County, Pennsylvania · Emmaus Boro · Structure no. 000000000023545

Built
1954
71 years old, rebuilt 1982
Condition
Fair
inspected March 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
184 ft
3 main spans
Daily traffic
44,406
2004 count
Owner
Toll Authority
State Toll Authority

About this bridge

Pa Tpk (I-476) over SR 0029 LR158 is a steel continuous stringer/multi-beam or girder carrying Pa Tpk (I-476) over SR 0029 LR158 in Lehigh County, Pennsylvania. It was built in 1954 and reconstructed in 1982, so it is 71 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 44,406 vehicles a day, roughly 16% of them trucks, projected to reach 71,429 by 2030. The structure is 184 ft (56.1 m) long and 62 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

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CarriesPa Tpk (I-476)
CrossesSR 0029 LR158
LocationEmmaus Boro
RouteInterstate 476
CountyLehigh County
StatePennsylvania
Coordinates40.52507, -75.51491
Functional classUrban Principal Arterial - Interstate

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.
Substructure7 GoodSome minor problems.
Last inspectionMarch 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry2: Basically intolerable, requiring high priority of replacement
Approach roadway alignment8: Equal to present desirable criteria
Operating rating64 US tons
Inventory rating38 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length184 ft (56.1 m)
Longest span76 ft (23.2 m)
Deck width62 ft (18.9 m)
Roadway width55 ft (16.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic44,406 (2004)
Projected traffic71,429 by 2030
Trucks16%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed3.1 mi (5 km)
TollOn a toll road
National Highway SystemYes
Strategic Highway NetworkInterstate STRAHNET route

Ownership and planned work

OwnerState Toll Authority
Maintained byState Toll Authority
Historic statusNot eligible for the National Register of Historic Places
Work proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$793,000
NavigationNot applicable (no waterway)

Frequently asked questions

When was Pa Tpk (I-476) over SR 0029 LR158 built?

It was built in 1954, making it 71 years old in 2025. It was reconstructed in 1982.

What condition is Pa Tpk (I-476) over SR 0029 LR158 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 March 2023.

How much traffic does Pa Tpk (I-476) over SR 0029 LR158 carry?

About 44,406 vehicles per day (2004 count), of which roughly 16% are trucks.

How long is Pa Tpk (I-476) over SR 0029 LR158?

The structure is 184 ft (56.1 m) long with a longest span of 76 ft (23.2 m) and a deck 62 ft wide.

Who owns Pa Tpk (I-476) over SR 0029 LR158?

It is owned by the State Toll Authority.