US Bridges

M-39 over Rouge River

Fair

Wayne County, Michigan · In Dearborn · Structure no. 000000000011673

Built
1963
62 years old, rebuilt 2001
Condition
Fair
inspected October 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
340 ft
5 main spans
Daily traffic
105,075
2020 count
Owner
State
State Highway Agency

About this bridge

M-39 over Rouge River is a steel continuous stringer/multi-beam or girder carrying M-39 over Rouge River in Wayne County, Michigan. It was built in 1963 and reconstructed in 2001, so it is 62 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 105,075 vehicles a day, roughly 3% of them trucks, projected to reach 111,550 by 2040. The structure is 340 ft (103.6 m) long and 93 ft wide.

CarriesM-39
CrossesRouge River
LocationIn Dearborn
RouteState Highway 39
Coordinates42.30746, -83.2143
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
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionOctober 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry9: Superior to present desirable criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating79.7 US tons
Inventory rating47.5 US tons

Structure

MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans5
Design loadHS 20
Structure length340 ft (103.6 m)
Longest span90 ft (27.4 m)
Deck width93 ft (28.2 m)
Roadway width86 ft (26.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic105,075 (2020)
Projected traffic111,550 by 2040
Trucks3%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed—
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—
NavigationNo navigation control on waterway

Frequently asked questions

When was M-39 over Rouge River built?

It was built in 1963, making it 62 years old in 2025. It was reconstructed in 2001.

What condition is M-39 over Rouge River 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 October 2024.

How much traffic does M-39 over Rouge River carry?

About 105,075 vehicles per day (2020 count), of which roughly 3% are trucks.

How long is M-39 over Rouge River?

The structure is 340 ft (103.6 m) long with a longest span of 90 ft (27.4 m) and a deck 93 ft wide.

Who owns M-39 over Rouge River?

It is owned by the State Highway Agency.