US Bridges

US-31|M-115|HONOR over Betsie River

Fair

Benzie County, Michigan · 1.2 MI S of Benzonia · Structure no. 000000000000755

Built
1984
41 years old
Condition
Fair
inspected July 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
79 ft
1 main span
Daily traffic
8,344
2007 count
Owner
State
State Highway Agency

About this bridge

US-31|M-115|HONOR over Betsie River is a prestressed concrete stringer/multi-beam or girder carrying US-31|M-115|HONOR over Betsie River in Benzie County, Michigan. It was built in 1984, so it is 41 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 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 8,344 vehicles a day, roughly 6% of them trucks, projected to reach 10,371 by 2018. The structure is 79 ft (24.1 m) long and 49 ft wide. If it were closed, the detour would be 14.9 mi (24 km).

Location

Open in Google Maps
CarriesUS-31|M-115|HONOR
CrossesBetsie River
Location1.2 MI S of Benzonia
RouteU.S. Route 31
CountyBenzie County
StateMichigan
Coordinates44.60053, -86.09917
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
Deck7 GoodSome minor problems.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJuly 2024
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 geometry9: Superior to present desirable criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating68.2 US tons
Inventory rating40.7 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 25 or greater
Structure length79 ft (24.1 m)
Longest span76 ft (23.3 m)
Deck width49 ft (15 m)
Roadway width46 ft (14 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic8,344 (2007)
Projected traffic10,371 by 2018
Trucks6%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed14.9 mi (24 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-31|M-115|HONOR over Betsie River built?

It was built in 1984, making it 41 years old in 2025.

What condition is US-31|M-115|HONOR over Betsie 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 July 2024.

How much traffic does US-31|M-115|HONOR over Betsie River carry?

About 8,344 vehicles per day (2007 count), of which roughly 6% are trucks.

How long is US-31|M-115|HONOR over Betsie River?

The structure is 79 ft (24.1 m) long with a longest span of 76 ft (23.3 m) and a deck 49 ft wide.

Who owns US-31|M-115|HONOR over Betsie River?

It is owned by the State Highway Agency.