US Bridges

I-94 over Clinton River Spillway

Fair

Macomb County, Michigan · 2.1 MI SE of Mt Clemens · Structure no. 000000000006139

Built
1959
66 years old, rebuilt 1984
Condition
Fair
inspected June 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
276 ft
4 main spans
Daily traffic
99,300
2007 count
Owner
State
State Highway Agency

About this bridge

I-94 over Clinton River Spillway is a steel stringer/multi-beam or girder carrying I-94 over Clinton River Spillway in Macomb County, Michigan. It was built in 1959 and reconstructed in 1984, so it is 66 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 99,300 vehicles a day, roughly 6% of them trucks, projected to reach 95,994 by 2018. The structure is 276 ft (84.1 m) long and 111 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesI-94
CrossesClinton River Spillway
Location2.1 MI SE of Mt Clemens
RouteInterstate 94
CountyMacomb County
StateMichigan
Coordinates42.56859, -82.85863
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.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJune 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry9: Superior to present desirable criteria
Waterway adequacy5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment7: Better than present minimum criteria
Operating rating75.4 US tons
Inventory rating45 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20
Structure length276 ft (84.1 m)
Longest span71 ft (21.6 m)
Deck width111 ft (33.7 m)
Roadway width106 ft (32.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic99,300 (2007)
Projected traffic95,994 by 2018
Trucks6%
Lanes on structure6
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 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—
NavigationNo navigation control on waterway

Frequently asked questions

When was I-94 over Clinton River Spillway built?

It was built in 1959, making it 66 years old in 2025. It was reconstructed in 1984.

What condition is I-94 over Clinton River Spillway 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 Clinton River Spillway carry?

About 99,300 vehicles per day (2007 count), of which roughly 6% are trucks.

How long is I-94 over Clinton River Spillway?

The structure is 276 ft (84.1 m) long with a longest span of 71 ft (21.6 m) and a deck 111 ft wide.

Who owns I-94 over Clinton River Spillway?

It is owned by the State Highway Agency.