US Bridges

M-43 over Sebewa Drain

Fair

Eaton County, Michigan · 2.0 MI E of Sunfield · Structure no. 000000000002226

Built
1949
76 years old, rebuilt 2004
Condition
Fair
inspected April 2023
Type
Box Beam or Girders - Single or Spread
Prestressed Concrete
Length
37 ft
1 main span
Daily traffic
4,192
2007 count
Owner
State
State Highway Agency

About this bridge

M-43 over Sebewa Drain is a prestressed concrete box beam or girders - single or spread carrying M-43 over Sebewa Drain in Eaton County, Michigan. It was built in 1949 and reconstructed in 2004, 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 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 4,192 vehicles a day, roughly 8% of them trucks, projected to reach 4,592 by 2018. The structure is 37 ft (11.2 m) long and 46 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesM-43
CrossesSebewa Drain
Location2.0 MI E of Sunfield
RouteState Highway 43
CountyEaton County
StateMichigan
Coordinates42.75563, -84.95722
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.
Superstructure8 Very GoodNo problems noted.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionApril 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating85 US tons
Inventory rating36 US tons

Structure

Structure typeBox Beam or Girders - Single or Spread
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 25 or greater
Structure length37 ft (11.2 m)
Longest span32 ft (9.8 m)
Deck width46 ft (14.1 m)
Roadway width44 ft (13.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic4,192 (2007)
Projected traffic4,592 by 2018
Trucks8%
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 proposedDeck replacement with only incidental widening
Estimated improvement cost$23,000
NavigationNo navigation control on waterway

Frequently asked questions

When was M-43 over Sebewa Drain built?

It was built in 1949, making it 76 years old in 2025. It was reconstructed in 2004.

What condition is M-43 over Sebewa Drain 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 April 2023.

How much traffic does M-43 over Sebewa Drain carry?

About 4,192 vehicles per day (2007 count), of which roughly 8% are trucks.

How long is M-43 over Sebewa Drain?

The structure is 37 ft (11.2 m) long with a longest span of 32 ft (9.8 m) and a deck 46 ft wide.

Who owns M-43 over Sebewa Drain?

It is owned by the State Highway Agency.