US Bridges

I-275 NB over Koppernick RD

Fair

Wayne County, Michigan · 1 MI W of Livonia · Structure no. 000000000011980

Built
1972
53 years old
Condition
Fair
inspected November 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
98 ft
1 main span
Daily traffic
63,759
2007 count
Owner
State
State Highway Agency

About this bridge

I-275 NB over Koppernick RD is a steel stringer/multi-beam or girder carrying I-275 NB over Koppernick RD in Wayne County, Michigan. It was built in 1972, so it is 53 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 63,759 vehicles a day, roughly 7% of them trucks, projected to reach 76,050 by 2042. The structure is 98 ft (30 m) long and 56 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesI-275 NB
CrossesKoppernick RD
Location1 MI W of Livonia
RouteInterstate 275
CountyWayne County
StateMichigan
Coordinates42.34132, -83.44172
Functional classUrban Principal Arterial - Interstate

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Last inspectionNovember 2024
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 rating80 US tons
Inventory rating47.8 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length98 ft (30 m)
Longest span95 ft (28.9 m)
Deck width56 ft (17.2 m)
Roadway width53 ft (16.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic63,759 (2007)
Projected traffic76,050 by 2042
Trucks7%
Lanes on structure3
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemYes
Strategic Highway NetworkInterstate STRAHNET route

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 I-275 NB over Koppernick RD built?

It was built in 1972, making it 53 years old in 2025.

What condition is I-275 NB over Koppernick 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 November 2024.

How much traffic does I-275 NB over Koppernick RD carry?

About 63,759 vehicles per day (2007 count), of which roughly 7% are trucks.

How long is I-275 NB over Koppernick RD?

The structure is 98 ft (30 m) long with a longest span of 95 ft (28.9 m) and a deck 56 ft wide.

Who owns I-275 NB over Koppernick RD?

It is owned by the State Highway Agency.