US Bridges

M-47 NB over US-10 EB

Fair

Bay County, Michigan · 11.5 MI W of Bay City · Structure no. 000000000000661

Built
2014
11 years old
Condition
Fair
inspected March 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
193 ft
2 main spans
Daily traffic
6,030
2014 count
Owner
State
State Highway Agency

About this bridge

M-47 NB over US-10 EB is a prestressed concrete stringer/multi-beam or girder carrying M-47 NB over US-10 EB in Bay County, Michigan. It was built in 2014, so it is 11 years old, younger 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 6,030 vehicles a day, roughly 17% of them trucks, projected to reach 6,670 by 2034. The structure is 193 ft (58.8 m) long and 62 ft wide.

Location

Open in Google Maps
CarriesM-47 NB
CrossesUS-10 EB
Location11.5 MI W of Bay City
RouteState Highway 47
CountyBay County
StateMichigan
Coordinates43.59772, -84.13905
Functional classUrban Principal Arterial - Other Freeway or Expressway

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.
Superstructure7 GoodSome minor problems.
Substructure8 Very GoodNo problems noted.
Last inspectionMarch 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry9: Superior to present desirable criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating78.9 US tons
Inventory rating45 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans2
Design loadGreater than HL 93
Structure length193 ft (58.8 m)
Longest span95 ft (29 m)
Deck width62 ft (18.8 m)
Roadway width56 ft (17.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic6,030 (2014)
Projected traffic6,670 by 2034
Trucks17%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed—
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—
NavigationNot applicable (no waterway)

Frequently asked questions

When was M-47 NB over US-10 EB built?

It was built in 2014, making it 11 years old in 2025.

What condition is M-47 NB over US-10 EB 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 2024.

How much traffic does M-47 NB over US-10 EB carry?

About 6,030 vehicles per day (2014 count), of which roughly 17% are trucks.

How long is M-47 NB over US-10 EB?

The structure is 193 ft (58.8 m) long with a longest span of 95 ft (29 m) and a deck 62 ft wide.

Who owns M-47 NB over US-10 EB?

It is owned by the State Highway Agency.