US Bridges

M-50 over Sebewa Drain

Fair

Eaton County, Michigan · 5.5 MI SE of Barry Col · Structure no. 000000000002231

Built
1934
91 years old
Condition
Fair
inspected March 2025
Type
Tee Beam
Concrete
Length
27 ft
1 main span
Daily traffic
2,443
2007 count
Owner
State
State Highway Agency

About this bridge

M-50 over Sebewa Drain is a concrete tee beam carrying M-50 over Sebewa Drain in Eaton County, Michigan. It was built in 1934, so it is 91 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 2,443 vehicles a day, roughly 16% of them trucks, projected to reach 3,460 by 2018. The structure is 27 ft (8.2 m) long and 49 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesM-50
CrossesSebewa Drain
Location5.5 MI SE of Barry Col
RouteState Highway 50
Coordinates42.71623, -84.9906
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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMarch 2025
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourUnknown foundation; not evaluated for scour
Structural evaluation6: Equal to present minimum criteria
Deck geometry9: Superior to present desirable criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating98.9 US tons
Inventory rating59.3 US tons

Structure

Structure typeTee Beam
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadH 15
Structure length27 ft (8.2 m)
Longest span26 ft (7.9 m)
Deck width49 ft (14.9 m)
Roadway width47 ft (14.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,443 (2007)
Projected traffic3,460 by 2018
Trucks16%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 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-50 over Sebewa Drain built?

It was built in 1934, making it 91 years old in 2025.

What condition is M-50 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 March 2025.

How much traffic does M-50 over Sebewa Drain carry?

About 2,443 vehicles per day (2007 count), of which roughly 16% are trucks.

How long is M-50 over Sebewa Drain?

The structure is 27 ft (8.2 m) long with a longest span of 26 ft (7.9 m) and a deck 49 ft wide.

Who owns M-50 over Sebewa Drain?

It is owned by the State Highway Agency.