US Bridges

US-12 Br over Mdot RR Corridor

Fair

Washtenaw County, Michigan · In Ypsilanti (e Mich Ave) · Structure no. 000000000010818

Built
1934
91 years old, rebuilt 2000
Condition
Fair
inspected August 2024
Type
Girder and Floorbeam System
Steel
Length
194 ft
3 main spans
Daily traffic
14,908
2007 count
Owner
State
State Highway Agency

About this bridge

US-12 Br over Mdot RR Corridor is a steel girder and floorbeam system carrying US-12 Br over Mdot RR Corridor in Washtenaw County, Michigan. It was built in 1934 and reconstructed in 2000, so it is 91 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 14,908 vehicles a day, roughly 4% of them trucks, projected to reach 18,514 by 2018. The structure is 194 ft (59.1 m) long and 56 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

CarriesUS-12 Br
CrossesMdot RR Corridor
LocationIn Ypsilanti (e Mich Ave)
RouteU.S. Route 12
Coordinates42.24197, -83.59836
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 inspectionAugust 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 alignment6: Equal to present minimum criteria
Operating rating95.3 US tons
Inventory rating57.1 US tons

Structure

MaterialSteel
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length194 ft (59.1 m)
Longest span81 ft (24.7 m)
Deck width56 ft (17.2 m)
Roadway width42 ft (12.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic14,908 (2007)
Projected traffic18,514 by 2018
Trucks4%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesRailroad
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 Br over Mdot RR Corridor built?

It was built in 1934, making it 91 years old in 2025. It was reconstructed in 2000.

What condition is US-12 Br over Mdot RR Corridor 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 US-12 Br over Mdot RR Corridor carry?

About 14,908 vehicles per day (2007 count), of which roughly 4% are trucks.

How long is US-12 Br over Mdot RR Corridor?

The structure is 194 ft (59.1 m) long with a longest span of 81 ft (24.7 m) and a deck 56 ft wide.

Who owns US-12 Br over Mdot RR Corridor?

It is owned by the State Highway Agency.