US Bridges

Harper Ave over I-94

Fair

Wayne County, Michigan · In Detroit · Structure no. 000000000011260

Built
1959
66 years old, rebuilt 2001
Condition
Fair
inspected June 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
232 ft
4 main spans
Daily traffic
5,948
2010 count
Owner
State
State Highway Agency

About this bridge

Harper Ave over I-94 is a steel stringer/multi-beam or girder carrying Harper Ave over I-94 in Wayne County, Michigan. It was built in 1959 and reconstructed in 2001, so it is 66 years old, older than the Michigan average of 48.3 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 5,948 vehicles a day, projected to reach 6,543 by 2025. The structure is 232 ft (70.7 m) long and 48 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesHarper Ave
CrossesI-94
LocationIn Detroit
RouteCity Street 0
CountyWayne County
StateMichigan
Coordinates42.42031, -82.93212
Functional classUrban 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.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Last inspectionJune 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment6: Equal to present minimum criteria
Operating rating89 US tons
Inventory rating53.2 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20
Structure length232 ft (70.7 m)
Longest span79 ft (24 m)
Deck width48 ft (14.6 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic5,948 (2010)
Projected traffic6,543 by 2025
Trucks—
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

Ownership and planned work

OwnerState Highway Agency
Maintained byState 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 Harper Ave over I-94 built?

It was built in 1959, making it 66 years old in 2025. It was reconstructed in 2001.

What condition is Harper Ave over I-94 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 June 2024.

How much traffic does Harper Ave over I-94 carry?

About 5,948 vehicles per day (2010 count).

How long is Harper Ave over I-94?

The structure is 232 ft (70.7 m) long with a longest span of 79 ft (24 m) and a deck 48 ft wide.

Who owns Harper Ave over I-94?

It is owned by the State Highway Agency.