US Bridges

M-25 over Sherman Creek

Fair

Sanilac County, Michigan · 4.1 MI N of M-46 · Structure no. 000000000009490

Built
1939
86 years old
Condition
Fair
inspected May 2024
Type
Tee Beam
Concrete
Length
31 ft
1 main span
Daily traffic
2,969
2007 count
Owner
State
State Highway Agency

About this bridge

M-25 over Sherman Creek is a concrete tee beam carrying M-25 over Sherman Creek in Sanilac County, Michigan. It was built in 1939, so it is 86 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 2,969 vehicles a day, roughly 4% of them trucks, projected to reach 4,387 by 2018. The structure is 31 ft (9.4 m) long and 47 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesM-25
CrossesSherman Creek
Location4.1 MI N of M-46
RouteState Highway 25
CountySanilac County
StateMichigan
Coordinates43.48815, -82.56498
Functional classRural Minor 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 inspectionMay 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation6: Equal to present minimum criteria
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 rating74.6 US tons
Inventory rating44.6 US tons

Structure

Structure typeTee Beam
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadH 15
Structure length31 ft (9.4 m)
Longest span31 ft (9.4 m)
Deck width47 ft (14.4 m)
Roadway width36 ft (10.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,969 (2007)
Projected traffic4,387 by 2018
Trucks4%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 km)
TollOn a free road
National Highway SystemNo

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-25 over Sherman Creek built?

It was built in 1939, making it 86 years old in 2025.

What condition is M-25 over Sherman Creek 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 May 2024.

How much traffic does M-25 over Sherman Creek carry?

About 2,969 vehicles per day (2007 count), of which roughly 4% are trucks.

How long is M-25 over Sherman Creek?

The structure is 31 ft (9.4 m) long with a longest span of 31 ft (9.4 m) and a deck 47 ft wide.

Who owns M-25 over Sherman Creek?

It is owned by the State Highway Agency.