US Bridges

M-28 over Sand River

Fair

Alger County, Michigan · 0.4 MI E of Marquette Col · Structure no. 000000000000044

Built
1939
86 years old
Condition
Fair
inspected May 2024
Type
Arch - Deck
Concrete
Length
64 ft
1 main span
Daily traffic
3,093
2007 count
Owner
State
State Highway Agency

About this bridge

M-28 over Sand River is a concrete arch - deck carrying M-28 over Sand River in Alger 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 3,093 vehicles a day, roughly 10% of them trucks, projected to reach 4,926 by 2018. The structure is 64 ft (19.5 m) long and 40 ft wide. If it were closed, the detour would be 55.3 mi (89 km).

Location

Open in Google Maps
CarriesM-28
CrossesSand River
Location0.4 MI E of Marquette Col
RouteState Highway 28
CountyAlger County
StateMichigan
Coordinates46.49506, -87.10731
Functional classRural Principal Arterial - Other

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 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 geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating62.8 US tons
Inventory rating37.5 US tons

Structure

Structure typeArch - Deck
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadH 20
Structure length64 ft (19.5 m)
Longest span56 ft (17.2 m)
Deck width40 ft (12.3 m)
Roadway width35 ft (10.7 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 statusListed on 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 Sand River built?

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

What condition is M-28 over Sand River 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-28 over Sand River carry?

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

How long is M-28 over Sand River?

The structure is 64 ft (19.5 m) long with a longest span of 56 ft (17.2 m) and a deck 40 ft wide.

Who owns M-28 over Sand River?

It is owned by the State Highway Agency.