US Bridges

King Road over Betsie River

PoorPosted for load

Benzie County, Michigan · 1.5 MI N of Thompsonville · Structure no. 000000000000771

Built
1973
52 years old
Condition
Poor
inspected August 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
60 ft
2 main spans
Daily traffic
52
2008 count
Owner
County
County Highway Agency

About this bridge

King Road over Betsie River is a steel stringer/multi-beam or girder carrying King Road over Betsie River in Benzie County, Michigan. It was built in 1973, so it is 52 years old, older than the Michigan average of 48.3 years.

The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 3 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. Its operating status is: posted for load restriction.

It carries about 52 vehicles a day, roughly 10% of them trucks, projected to reach 70 by 2018. The structure is 60 ft (18.2 m) long and 24 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

CarriesKing Road
CrossesBetsie River
Location1.5 MI N of Thompsonville
RouteCounty Highway 0
Coordinates44.54224, -85.94238
Functional classRural Local

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

ComponentRatingMeaning
Deck3 SeriousLoss of section, deterioration, spalling or scour have seriously affected primary structural components.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection7 GoodSome minor problems.
Last inspectionAugust 2024
Inspection intervalevery 12 months
Operating statusPosted for load restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating38.6 US tons
Inventory rating23.3 US tons

Structure

MaterialSteel
DeckCorrugated steel
Main spans2
Design loadHS 20
Structure length60 ft (18.2 m)
Longest span30 ft (9.1 m)
Deck width24 ft (7.3 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic52 (2008)
Projected traffic70 by 2018
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty 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 King Road over Betsie River built?

It was built in 1973, making it 52 years old in 2025.

What condition is King Road over Betsie River in?

The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in August 2024.

How much traffic does King Road over Betsie River carry?

About 52 vehicles per day (2008 count), of which roughly 10% are trucks.

How long is King Road over Betsie River?

The structure is 60 ft (18.2 m) long with a longest span of 30 ft (9.1 m) and a deck 24 ft wide.

Who owns King Road over Betsie River?

It is owned by the County Highway Agency.