US Bridges

Pa Tpk (I-476) over T-593; Lime Kiln RD

Fair

Lehigh County, Pennsylvania · Near Allentown Orefield · Structure no. 000000000023562

Built
1955
70 years old
Condition
Fair
inspected August 2023
Type
Tee Beam
Concrete
Length
38 ft
1 main span
Daily traffic
30,563
2004 count
Owner
Toll Authority
State Toll Authority

About this bridge

Pa Tpk (I-476) over T-593; Lime Kiln RD is a concrete tee beam carrying Pa Tpk (I-476) over T-593; Lime Kiln RD in Lehigh County, Pennsylvania. It was built in 1955, so it is 70 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 30,563 vehicles a day, roughly 16% of them trucks, projected to reach 39,946 by 2030. The structure is 38 ft (11.6 m) long and 68 ft wide. If it were closed, the detour would be 9.9 mi (16 km).

Location

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CarriesPa Tpk (I-476)
CrossesT-593; Lime Kiln RD
LocationNear Allentown Orefield
RouteInterstate 476
CountyLehigh County
StatePennsylvania
Coordinates40.62844, -75.57681
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionAugust 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating58 US tons
Inventory rating35.1 US tons

Structure

Structure typeTee Beam
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length38 ft (11.6 m)
Longest span34 ft (10.4 m)
Deck width68 ft (20.7 m)
Roadway width61 ft (18.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic30,563 (2004)
Projected traffic39,946 by 2030
Trucks16%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed9.9 mi (16 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 statusHistorical significance not determinable at this time
Work proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$119,000
NavigationNot applicable (no waterway)

Frequently asked questions

When was Pa Tpk (I-476) over T-593; Lime Kiln RD built?

It was built in 1955, making it 70 years old in 2025.

What condition is Pa Tpk (I-476) over T-593; Lime Kiln 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 August 2023.

How much traffic does Pa Tpk (I-476) over T-593; Lime Kiln RD carry?

About 30,563 vehicles per day (2004 count), of which roughly 16% are trucks.

How long is Pa Tpk (I-476) over T-593; Lime Kiln RD?

The structure is 38 ft (11.6 m) long with a longest span of 34 ft (10.4 m) and a deck 68 ft wide.

Who owns Pa Tpk (I-476) over T-593; Lime Kiln RD?

It is owned by the State Toll Authority.