US Bridges

M-39 (ramp H) over M-10 WB (ramp G)

Fair

Oakland County, Michigan · In Southfield (ramp G) · Structure no. 000000000007873

Built
1964
61 years old, rebuilt 2006
Condition
Fair
inspected June 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
160 ft
3 main spans
Daily traffic
67,700
1987 count
Owner
State
State Highway Agency

About this bridge

M-39 (ramp H) over M-10 WB (ramp G) is a steel stringer/multi-beam or girder carrying M-39 (ramp H) over M-10 WB (ramp G) in Oakland County, Michigan. It was built in 1964 and reconstructed in 2006, so it is 61 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 5 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 67,700 vehicles a day, roughly 6% of them trucks, projected to reach 67,700 by 2007. The structure is 160 ft (48.8 m) long and 47 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesM-39 (ramp H)
CrossesM-10 WB (ramp G)
LocationIn Southfield (ramp G)
RouteState Highway 39
CountyOakland County
StateMichigan
Coordinates42.45626, -83.21861
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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJune 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating77.2 US tons
Inventory rating46.1 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length160 ft (48.8 m)
Longest span64 ft (19.6 m)
Deck width47 ft (14.3 m)
Roadway width43 ft (13.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic67,700 (1987)
Projected traffic67,700 by 2007
Trucks6%
Lanes on structure3
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed1.2 mi (2 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 (ramp H) over M-10 WB (ramp G) built?

It was built in 1964, making it 61 years old in 2025. It was reconstructed in 2006.

What condition is M-39 (ramp H) over M-10 WB (ramp G) 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 2023.

How much traffic does M-39 (ramp H) over M-10 WB (ramp G) carry?

About 67,700 vehicles per day (1987 count), of which roughly 6% are trucks.

How long is M-39 (ramp H) over M-10 WB (ramp G)?

The structure is 160 ft (48.8 m) long with a longest span of 64 ft (19.6 m) and a deck 47 ft wide.

Who owns M-39 (ramp H) over M-10 WB (ramp G)?

It is owned by the State Highway Agency.