US Bridges

M-28 over Laughing Whitefish River

Good

Alger County, Michigan · 3.2 MI E of Marquette Col · Structure no. 000000000000045

Built
1939
86 years old, rebuilt 2005
Condition
Good
inspected May 2024
Type
Box Beam or Girders - Single or Spread
Prestressed Concrete
Length
40 ft
1 main span
Daily traffic
3,093
2007 count
Owner
State
State Highway Agency

About this bridge

M-28 over Laughing Whitefish River is a prestressed concrete box beam or girders - single or spread carrying M-28 over Laughing Whitefish River in Alger County, Michigan. It was built in 1939 and reconstructed in 2005, 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 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 3,093 vehicles a day, roughly 10% of them trucks, projected to reach 4,926 by 2018. The structure is 40 ft (12.2 m) long and 46 ft wide. If it were closed, the detour would be 55.3 mi (89 km).

CarriesM-28
CrossesLaughing Whitefish River
Location3.2 MI E of Marquette Col
RouteState Highway 28
Coordinates46.4938, -87.05119
Functional classRural Principal Arterial - Other

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.
Superstructure8 Very GoodNo problems noted.
Substructure7 GoodSome minor problems.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMay 2024
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 adequacy6: Equal to present minimum criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating49.6 US tons
Inventory rating29.7 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadH 20
Structure length40 ft (12.2 m)
Longest span36 ft (11 m)
Deck width46 ft (14.1 m)
Roadway width44 ft (13.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,093 (2007)
Projected traffic4,926 by 2018
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed55.3 mi (89 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 proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was M-28 over Laughing Whitefish River built?

It was built in 1939, making it 86 years old in 2025. It was reconstructed in 2005.

What condition is M-28 over Laughing Whitefish River 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 May 2024.

How much traffic does M-28 over Laughing Whitefish River carry?

About 3,093 vehicles per day (2007 count), of which roughly 10% are trucks.

How long is M-28 over Laughing Whitefish River?

The structure is 40 ft (12.2 m) long with a longest span of 36 ft (11 m) and a deck 46 ft wide.

Who owns M-28 over Laughing Whitefish River?

It is owned by the State Highway Agency.