US Bridges

M-39 SB Ramp K over I-94

Fair

Wayne County, Michigan · In Allen Park · Structure no. 000000000011148

Built
1984
41 years old
Condition
Fair
inspected August 2024
Type
Segmental Box Girder
Prestressed Concrete Continuous
Length
1,567 ft
5 main spans
Daily traffic
4,150
1982 count
Owner
State
State Highway Agency

About this bridge

M-39 SB Ramp K over I-94 is a prestressed concrete continuous segmental box girder carrying M-39 SB Ramp K over I-94 in Wayne County, Michigan. It was built in 1984, so it is 41 years old, younger 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 4,150 vehicles a day, roughly 3% of them trucks, projected to reach 4,150 by 2010. The structure is 1,567 ft (477.7 m) long and 36 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesM-39 SB Ramp K
CrossesI-94
LocationIn Allen Park
RouteInterstate 94
CountyWayne County
StateMichigan
Coordinates42.2671, -83.2223
Functional classUrban Principal Arterial - Other Freeway or Expressway

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 2024
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 rating82.5 US tons
Inventory rating36.4 US tons

Structure

Structure typeSegmental Box Girder
MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans5 (+10 approach)
Design loadHS 25 or greater
Structure length1,567 ft (477.7 m)
Longest span181 ft (55.1 m)
Deck width36 ft (10.9 m)
Roadway width32 ft (9.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic4,150 (1982)
Projected traffic4,150 by 2010
Trucks3%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed3.1 mi (5 km)
TollOn a free road
National Highway SystemYes

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 M-39 SB Ramp K over I-94 built?

It was built in 1984, making it 41 years old in 2025.

What condition is M-39 SB Ramp K 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 August 2024.

How much traffic does M-39 SB Ramp K over I-94 carry?

About 4,150 vehicles per day (1982 count), of which roughly 3% are trucks.

How long is M-39 SB Ramp K over I-94?

The structure is 1,567 ft (477.7 m) long with a longest span of 181 ft (55.1 m) and a deck 36 ft wide.

Who owns M-39 SB Ramp K over I-94?

It is owned by the State Highway Agency.