US Bridges

I-94 over Quinn RD

Fair

Macomb County, Michigan · 0.5 MI N of ST Clair Shrs · Structure no. 000000000006165

Built
2002
23 years old
Condition
Fair
inspected June 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
121 ft
3 main spans
Daily traffic
99,698
2007 count
Owner
State
State Highway Agency

About this bridge

I-94 over Quinn RD is a steel stringer/multi-beam or girder carrying I-94 over Quinn RD in Macomb County, Michigan. It was built in 2002, so it is 23 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 99,698 vehicles a day, roughly 5% of them trucks, projected to reach 98,524 by 2018. The structure is 121 ft (36.9 m) long and 124 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesI-94
CrossesQuinn RD
Location0.5 MI N of ST Clair Shrs
RouteInterstate 94
CountyMacomb County
StateMichigan
Coordinates42.54775, -82.87929
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure8 Very GoodNo problems noted.
Substructure7 GoodSome minor problems.
Last inspectionJune 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry9: Superior to present desirable criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating107.1 US tons
Inventory rating70.3 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20 + Mod
Structure length121 ft (36.9 m)
Longest span51 ft (15.5 m)
Deck width124 ft (37.7 m)
Roadway width117 ft (35.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic99,698 (2007)
Projected traffic98,524 by 2018
Trucks5%
Lanes on structure6
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed3.1 mi (5 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-94 over Quinn RD built?

It was built in 2002, making it 23 years old in 2025.

What condition is I-94 over Quinn 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 June 2023.

How much traffic does I-94 over Quinn RD carry?

About 99,698 vehicles per day (2007 count), of which roughly 5% are trucks.

How long is I-94 over Quinn RD?

The structure is 121 ft (36.9 m) long with a longest span of 51 ft (15.5 m) and a deck 124 ft wide.

Who owns I-94 over Quinn RD?

It is owned by the State Highway Agency.