US Bridges

US-12 WB over US-24

Poor

Wayne County, Michigan · In Dearborn over US-24 · Structure no. 000000000011312

Built
1937
88 years old, rebuilt 1983
Condition
Poor
inspected December 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
95 ft
2 main spans
Daily traffic
23,295
2007 count
Owner
State
State Highway Agency

About this bridge

US-12 WB over US-24 is a steel stringer/multi-beam or girder carrying US-12 WB over US-24 in Wayne County, Michigan. It was built in 1937 and reconstructed in 1983, so it is 88 years old, older than the Michigan average of 48.3 years.

The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

It carries about 23,295 vehicles a day, roughly 2% of them trucks, projected to reach 30,895 by 2015. The structure is 95 ft (29 m) long and 63 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesUS-12 WB
CrossesUS-24
LocationIn Dearborn over US-24
RouteU.S. Route 12
Coordinates42.29993, -83.27164
Functional classUrban Other Principal Arterial

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

ComponentRatingMeaning
Deck4 PoorAdvanced section loss, deterioration, spalling or scour.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Last inspectionDecember 2024
Inspection intervalevery 12 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment7: Better than present minimum criteria
Operating rating84.7 US tons
Inventory rating50.7 US tons

Structure

MaterialSteel
DeckConcrete, cast-in-place
Main spans2
Design loadH 20
Structure length95 ft (29 m)
Longest span48 ft (14.6 m)
Deck width63 ft (19.2 m)
Roadway width54 ft (16.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic23,295 (2007)
Projected traffic30,895 by 2015
Trucks2%
Lanes on structure4
Traffic directionOne-way traffic
CarriesHighway and pedestrian
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 US-12 WB over US-24 built?

It was built in 1937, making it 88 years old in 2025. It was reconstructed in 1983.

What condition is US-12 WB over US-24 in?

The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in December 2024.

How much traffic does US-12 WB over US-24 carry?

About 23,295 vehicles per day (2007 count), of which roughly 2% are trucks.

How long is US-12 WB over US-24?

The structure is 95 ft (29 m) long with a longest span of 48 ft (14.6 m) and a deck 63 ft wide.

Who owns US-12 WB over US-24?

It is owned by the State Highway Agency.