US Bridges

US-12 over M-10 SB

Fair

Wayne County, Michigan · In Detroit · Structure no. 000000000011401

Built
1954
71 years old, rebuilt 1997
Condition
Fair
inspected May 2024
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
66 ft
1 main span
Daily traffic
9,034
2007 count
Owner
State
State Highway Agency

About this bridge

US-12 over M-10 SB is a prestressed concrete box beam or girders - multiple carrying US-12 over M-10 SB in Wayne County, Michigan. It was built in 1954 and reconstructed in 1997, so it is 71 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 9,034 vehicles a day, roughly 13% of them trucks, projected to reach 9,416 by 2018. The structure is 66 ft (20 m) long and 122 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesUS-12
CrossesM-10 SB
LocationIn Detroit
RouteU.S. Route 12
CountyWayne County
StateMichigan
Coordinates42.33155, -83.06188
Functional classUrban Other Principal Arterial

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 inspectionMay 2024
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 geometry2: Basically intolerable, requiring high priority of replacement
Approach roadway alignment8: Equal to present desirable criteria
Operating rating81.8 US tons
Inventory rating50.4 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length66 ft (20 m)
Longest span66 ft (20 m)
Deck width122 ft (37.2 m)
Roadway width90 ft (27.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic9,034 (2007)
Projected traffic9,416 by 2018
Trucks13%
Lanes on structure9
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesHighway
Detour if closed1.9 mi (3 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 US-12 over M-10 SB built?

It was built in 1954, making it 71 years old in 2025. It was reconstructed in 1997.

What condition is US-12 over M-10 SB 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 May 2024.

How much traffic does US-12 over M-10 SB carry?

About 9,034 vehicles per day (2007 count), of which roughly 13% are trucks.

How long is US-12 over M-10 SB?

The structure is 66 ft (20 m) long with a longest span of 66 ft (20 m) and a deck 122 ft wide.

Who owns US-12 over M-10 SB?

It is owned by the State Highway Agency.