US Bridges

15th Street over Mlk Jr. Drive

Good

Lehigh County, Pennsylvania · NW of Little Lehigh Creek · Structure no. 000000000048370

Built
2013
12 years old
Condition
Good
inspected December 2023
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
90 ft
1 main span
Daily traffic
20,000
2013 count
Owner
City
City or Municipal Highway Agency

About this bridge

15th Street over Mlk Jr. Drive is a prestressed concrete box beam or girders - multiple carrying 15th Street over Mlk Jr. Drive in Lehigh County, Pennsylvania. It was built in 2013, so it is 12 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 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 20,000 vehicles a day, roughly 10% of them trucks, projected to reach 21,000 by 2023. The structure is 90 ft (27.4 m) long and 66 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Carries15th Street
CrossesMlk Jr. Drive
LocationNW of Little Lehigh Creek
RouteCity Street 7301
Coordinates40.59155, -75.48383
Functional classUrban Local

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Last inspectionDecember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation8: Equal to present desirable criteria
Deck geometry9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating85.8 US tons
Inventory rating43.2 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHL 93
Structure length90 ft (27.4 m)
Longest span88 ft (26.8 m)
Deck width66 ft (20 m)
Roadway width50 ft (15.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic20,000 (2013)
Projected traffic21,000 by 2023
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesHighway
Detour if closed1.9 mi (3 km)
TollOn a free road
National Highway SystemNo
Strategic Highway NetworkInterstate STRAHNET route

Ownership and planned work

OwnerCity or Municipal Highway Agency
Maintained byCity or Municipal Highway Agency
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 15th Street over Mlk Jr. Drive built?

It was built in 2013, making it 12 years old in 2025.

What condition is 15th Street over Mlk Jr. Drive 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 December 2023.

How much traffic does 15th Street over Mlk Jr. Drive carry?

About 20,000 vehicles per day (2013 count), of which roughly 10% are trucks.

How long is 15th Street over Mlk Jr. Drive?

The structure is 90 ft (27.4 m) long with a longest span of 88 ft (26.8 m) and a deck 66 ft wide.

Who owns 15th Street over Mlk Jr. Drive?

It is owned by the City or Municipal Highway Agency.