US Bridges

M-50 over Wilson Spring Drain

Good

Lenawee County, Michigan · West Limits of Britton · Structure no. 000000000005540

Built
2000
25 years old
Condition
Good
inspected September 2024
Type
Box Beam or Girders - Single or Spread
Prestressed Concrete
Length
34 ft
1 main span
Daily traffic
6,842
2007 count
Owner
State
State Highway Agency

About this bridge

M-50 over Wilson Spring Drain is a prestressed concrete box beam or girders - single or spread carrying M-50 over Wilson Spring Drain in Lenawee County, Michigan. It was built in 2000, so it is 25 years old, younger than the Michigan average of 48.3 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 6,842 vehicles a day, roughly 7% of them trucks, projected to reach 7,860 by 2017. The structure is 34 ft (10.5 m) long and 47 ft wide.

Location

Open in Google Maps
CarriesM-50
CrossesWilson Spring Drain
LocationWest Limits of Britton
RouteState Highway 50
CountyLenawee County
StateMichigan
Coordinates41.98765, -83.83616
Functional classRural Minor Arterial

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionSeptember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation7: Better than present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating69.7 US tons
Inventory rating41.8 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 length34 ft (10.5 m)
Longest span31 ft (9.5 m)
Deck width47 ft (14.2 m)
Roadway width43 ft (13.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic6,842 (2007)
Projected traffic7,860 by 2017
Trucks7%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed—
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 Wilson Spring Drain built?

It was built in 2000, making it 25 years old in 2025.

What condition is M-50 over Wilson Spring Drain in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in September 2024.

How much traffic does M-50 over Wilson Spring Drain carry?

About 6,842 vehicles per day (2007 count), of which roughly 7% are trucks.

How long is M-50 over Wilson Spring Drain?

The structure is 34 ft (10.5 m) long with a longest span of 31 ft (9.5 m) and a deck 47 ft wide.

Who owns M-50 over Wilson Spring Drain?

It is owned by the State Highway Agency.