US Bridges

M-25 over Sebewaing River

Fair

Huron County, Michigan · In Sebewaing · Structure no. 000000000003444

Built
1949
76 years old, rebuilt 2007
Condition
Fair
inspected June 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
144 ft
3 main spans
Daily traffic
5,123
2007 count
Owner
State
State Highway Agency

About this bridge

M-25 over Sebewaing River is a steel continuous stringer/multi-beam or girder carrying M-25 over Sebewaing River in Huron County, Michigan. It was built in 1949 and reconstructed in 2007, so it is 76 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 5,123 vehicles a day, roughly 3% of them trucks, projected to reach 6,518 by 2018. The structure is 144 ft (43.9 m) long and 53 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

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CarriesM-25
CrossesSebewaing River
LocationIn Sebewaing
RouteState Highway 25
CountyHuron County
StateMichigan
Coordinates43.73265, -83.44606
Functional classRural Principal Arterial - Other

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.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
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 geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating92.2 US tons
Inventory rating55.3 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20 + Mod
Structure length144 ft (43.9 m)
Longest span57 ft (17.4 m)
Deck width53 ft (16.2 m)
Roadway width38 ft (11.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic5,123 (2007)
Projected traffic6,518 by 2018
Trucks3%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed3.1 mi (5 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 proposedDeck replacement with only incidental widening
Estimated improvement cost$127,000
NavigationNo navigation control on waterway

Frequently asked questions

When was M-25 over Sebewaing River built?

It was built in 1949, making it 76 years old in 2025. It was reconstructed in 2007.

What condition is M-25 over Sebewaing 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 June 2023.

How much traffic does M-25 over Sebewaing River carry?

About 5,123 vehicles per day (2007 count), of which roughly 3% are trucks.

How long is M-25 over Sebewaing River?

The structure is 144 ft (43.9 m) long with a longest span of 57 ft (17.4 m) and a deck 53 ft wide.

Who owns M-25 over Sebewaing River?

It is owned by the State Highway Agency.