US Bridges

US-131 over Boyne River

Fair

Charlevoix County, Michigan · 0.8 MI N of Boyne Falls · Structure no. 000000000001479

Built
1947
78 years old
Condition
Fair
inspected August 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
31 ft
1 main span
Daily traffic
6,736
2007 count
Owner
State
State Highway Agency

About this bridge

US-131 over Boyne River is a steel stringer/multi-beam or girder carrying US-131 over Boyne River in Charlevoix County, Michigan. It was built in 1947, so it is 78 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 5 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 6,736 vehicles a day, roughly 8% of them trucks, projected to reach 7,997 by 2018. The structure is 31 ft (9.4 m) long and 43 ft wide. If it were closed, the detour would be 19.3 mi (31 km).

Location

Open in Google Maps
CarriesUS-131
CrossesBoyne River
Location0.8 MI N of Boyne Falls
RouteU.S. Route 131
CountyCharlevoix County
StateMichigan
Coordinates45.18021, -84.91427
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.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionAugust 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating72.5 US tons
Inventory rating43.2 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length31 ft (9.4 m)
Longest span30 ft (9 m)
Deck width43 ft (13.2 m)
Roadway width38 ft (11.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic6,736 (2007)
Projected traffic7,997 by 2018
Trucks8%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed19.3 mi (31 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 US-131 over Boyne River built?

It was built in 1947, making it 78 years old in 2025.

What condition is US-131 over Boyne 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 August 2023.

How much traffic does US-131 over Boyne River carry?

About 6,736 vehicles per day (2007 count), of which roughly 8% are trucks.

How long is US-131 over Boyne River?

The structure is 31 ft (9.4 m) long with a longest span of 30 ft (9 m) and a deck 43 ft wide.

Who owns US-131 over Boyne River?

It is owned by the State Highway Agency.