US Bridges

M-97 over Clinton River

Fair

Macomb County, Michigan · At S Limits of Mt Clemens · Structure no. 000000000006066

Built
1948
77 years old, rebuilt 2005
Condition
Fair
inspected October 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
210 ft
3 main spans
Daily traffic
29,299
2007 count
Owner
State
State Highway Agency

About this bridge

M-97 over Clinton River is a steel stringer/multi-beam or girder carrying M-97 over Clinton River in Macomb County, Michigan. It was built in 1948 and reconstructed in 2005, so it is 77 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 29,299 vehicles a day, roughly 13% of them trucks, projected to reach 41,000 by 2025. The structure is 210 ft (64 m) long and 82 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesM-97
CrossesClinton River
LocationAt S Limits of Mt Clemens
RouteState Highway 97
CountyMacomb County
StateMichigan
Coordinates42.59067, -82.90142
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionOctober 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment7: Better than present minimum criteria
Operating rating87.2 US tons
Inventory rating52.1 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length210 ft (64 m)
Longest span69 ft (21.1 m)
Deck width82 ft (25.1 m)
Roadway width68 ft (20.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic29,299 (2007)
Projected traffic41,000 by 2025
Trucks13%
Lanes on structure5
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
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—
NavigationNo navigation control on waterway

Frequently asked questions

When was M-97 over Clinton River built?

It was built in 1948, making it 77 years old in 2025. It was reconstructed in 2005.

What condition is M-97 over Clinton River 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 October 2024.

How much traffic does M-97 over Clinton River carry?

About 29,299 vehicles per day (2007 count), of which roughly 13% are trucks.

How long is M-97 over Clinton River?

The structure is 210 ft (64 m) long with a longest span of 69 ft (21.1 m) and a deck 82 ft wide.

Who owns M-97 over Clinton River?

It is owned by the State Highway Agency.