US Bridges

M-39 NB over 9 Mile RD

Fair

Oakland County, Michigan · In Southfield · Structure no. 000000000007877

Built
1998
27 years old
Condition
Fair
inspected August 2024
Type
Box Beam or Girders - Single or Spread
Prestressed Concrete
Length
134 ft
3 main spans
Daily traffic
45,241
2007 count
Owner
State
State Highway Agency

About this bridge

M-39 NB over 9 Mile RD is a prestressed concrete box beam or girders - single or spread carrying M-39 NB over 9 Mile RD in Oakland County, Michigan. It was built in 1998, so it is 27 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 45,241 vehicles a day, roughly 5% of them trucks, projected to reach 52,851 by 2018. The structure is 134 ft (40.7 m) long and 90 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesM-39 NB
Crosses9 Mile RD
LocationIn Southfield
RouteState Highway 39
CountyOakland County
StateMichigan
Coordinates42.45888, -83.2196
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.
Substructure7 GoodSome minor problems.
Last inspectionAugust 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating70.3 US tons
Inventory rating34 US tons

Structure

Structure typeBox Beam or Girders - Single or Spread
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans3
Design loadHS 25 or greater
Structure length134 ft (40.7 m)
Longest span74 ft (22.5 m)
Deck width90 ft (27.3 m)
Roadway width84 ft (25.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic45,241 (2007)
Projected traffic52,851 by 2018
Trucks5%
Lanes on structure5
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 NB over 9 Mile RD built?

It was built in 1998, making it 27 years old in 2025.

What condition is M-39 NB over 9 Mile RD 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 NB over 9 Mile RD carry?

About 45,241 vehicles per day (2007 count), of which roughly 5% are trucks.

How long is M-39 NB over 9 Mile RD?

The structure is 134 ft (40.7 m) long with a longest span of 74 ft (22.5 m) and a deck 90 ft wide.

Who owns M-39 NB over 9 Mile RD?

It is owned by the State Highway Agency.