US Bridges

M-10 Ramp H over M-39

Fair

Oakland County, Michigan · In Southfield Ramp H · Structure no. 000000000007875

Built
1964
61 years old, rebuilt 2006
Condition
Fair
inspected June 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
120 ft
3 main spans
Daily traffic
10,200
1988 count
Owner
State
State Highway Agency

About this bridge

M-10 Ramp H over M-39 is a steel stringer/multi-beam or girder carrying M-10 Ramp H over M-39 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 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 10,200 vehicles a day, roughly 2% of them trucks, projected to reach 6,300 by 2027. The structure is 120 ft (36.7 m) long and 35 ft wide.

Location

Open in Google Maps
CarriesM-10 Ramp H
CrossesM-39
LocationIn Southfield Ramp H
RouteState Highway 10
CountyOakland County
StateMichigan
Coordinates42.45668, -83.21965
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.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJune 2023
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 rating95 US tons
Inventory rating55.7 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length120 ft (36.7 m)
Longest span57 ft (17.3 m)
Deck width35 ft (10.7 m)
Roadway width32 ft (9.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic10,200 (1988)
Projected traffic6,300 by 2027
Trucks2%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
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 proposedDeck replacement with only incidental widening
Estimated improvement cost$50,000
NavigationNot applicable (no waterway)

Frequently asked questions

When was M-10 Ramp H over M-39 built?

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

What condition is M-10 Ramp H over M-39 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-10 Ramp H over M-39 carry?

About 10,200 vehicles per day (1988 count), of which roughly 2% are trucks.

How long is M-10 Ramp H over M-39?

The structure is 120 ft (36.7 m) long with a longest span of 57 ft (17.3 m) and a deck 35 ft wide.

Who owns M-10 Ramp H over M-39?

It is owned by the State Highway Agency.