US Bridges

SR 4020 Lr 39116 over Pa Tpk (I-476)

Fair

Lehigh County, Pennsylvania · 2 MI South of Slatington · Structure no. 000000000023572

Built
1956
69 years old
Condition
Fair
inspected July 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
104 ft
1 main span
Daily traffic
880
2024 count
Owner
Toll Authority
State Toll Authority

About this bridge

SR 4020 Lr 39116 over Pa Tpk (I-476) is a steel stringer/multi-beam or girder carrying SR 4020 Lr 39116 over Pa Tpk (I-476) in Lehigh County, Pennsylvania. It was built in 1956, so it is 69 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 880 vehicles a day, roughly 2% of them trucks, projected to reach 1,064 by 2030. The structure is 104 ft (31.7 m) long and 36 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesSR 4020 Lr 39116
CrossesPa Tpk (I-476)
Location2 MI South of Slatington
RouteState Highway 0
CountyLehigh County
StatePennsylvania
Coordinates40.73185, -75.62852
Functional classRural Local

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 inspectionJuly 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating110.1 US tons
Inventory rating72 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length104 ft (31.7 m)
Longest span101 ft (30.8 m)
Deck width36 ft (10.9 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic880 (2024)
Projected traffic1,064 by 2030
Trucks2%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemNo

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$137,000
NavigationNot applicable (no waterway)

Frequently asked questions

When was SR 4020 Lr 39116 over Pa Tpk (I-476) built?

It was built in 1956, making it 69 years old in 2025.

What condition is SR 4020 Lr 39116 over Pa Tpk (I-476) 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 July 2023.

How much traffic does SR 4020 Lr 39116 over Pa Tpk (I-476) carry?

About 880 vehicles per day (2024 count), of which roughly 2% are trucks.

How long is SR 4020 Lr 39116 over Pa Tpk (I-476)?

The structure is 104 ft (31.7 m) long with a longest span of 101 ft (30.8 m) and a deck 36 ft wide.

Who owns SR 4020 Lr 39116 over Pa Tpk (I-476)?

It is owned by the State Toll Authority.