US Bridges

Pa Tpk (I-476) over SR 4018 & Trout Creek

Good

Lehigh County, Pennsylvania · Emerald W. of Slatington · Structure no. 000000000053587

Built
2016
9 years old
Condition
Good
inspected September 2022
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
533 ft
3 main spans
Daily traffic
25,000
2016 count
Owner
Toll Authority
State Toll Authority

About this bridge

Pa Tpk (I-476) over SR 4018 & Trout Creek is a steel continuous stringer/multi-beam or girder carrying Pa Tpk (I-476) over SR 4018 & Trout Creek in Lehigh County, Pennsylvania. It was built in 2016, so it is 9 years old, younger 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 8 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 25,000 vehicles a day, roughly 2% of them trucks, projected to reach 30,000 by 2036. The structure is 533 ft (162.5 m) long and 125 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesPa Tpk (I-476)
CrossesSR 4018 & Trout Creek
LocationEmerald W. of Slatington
RouteInterstate 0
CountyLehigh County
StatePennsylvania
Coordinates40.74576, -75.63235
Functional classRural Principal Arterial - Interstate

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.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Channel and channel protection7 GoodSome minor problems.
Last inspectionSeptember 2022
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation8: Equal to present desirable criteria
Deck geometry9: Superior to present desirable criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating96.1 US tons
Inventory rating78.6 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHL 93
Structure length533 ft (162.5 m)
Longest span191 ft (58.2 m)
Deck width125 ft (38.1 m)
Roadway width118 ft (36 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic25,000 (2016)
Projected traffic30,000 by 2036
Trucks2%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway and waterway
Detour if closed1.2 mi (2 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 proposedNone recorded
Estimated improvement cost—
NavigationNot applicable (no waterway)

Frequently asked questions

When was Pa Tpk (I-476) over SR 4018 & Trout Creek built?

It was built in 2016, making it 9 years old in 2025.

What condition is Pa Tpk (I-476) over SR 4018 & Trout Creek 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 2022.

How much traffic does Pa Tpk (I-476) over SR 4018 & Trout Creek carry?

About 25,000 vehicles per day (2016 count), of which roughly 2% are trucks.

How long is Pa Tpk (I-476) over SR 4018 & Trout Creek?

The structure is 533 ft (162.5 m) long with a longest span of 191 ft (58.2 m) and a deck 125 ft wide.

Who owns Pa Tpk (I-476) over SR 4018 & Trout Creek?

It is owned by the State Toll Authority.