US Bridges

US-131|M-66|M-72|S over N Br Boardman River

Fair

Kalkaska County, Michigan · S Lts of Kalkaska · Structure no. 000000000004691

Built
1940
85 years old, rebuilt 2000
Condition
Fair
inspected June 2023
Type
Box Beam or Girders - Single or Spread
Prestressed Concrete
Length
29 ft
1 main span
Daily traffic
8,567
2007 count
Owner
State
State Highway Agency

About this bridge

US-131|M-66|M-72|S over N Br Boardman River is a prestressed concrete box beam or girders - single or spread carrying US-131|M-66|M-72|S over N Br Boardman River in Kalkaska County, Michigan. It was built in 1940 and reconstructed in 2000, so it is 85 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 8,567 vehicles a day, roughly 7% of them trucks, projected to reach 14,793 by 2018. The structure is 29 ft (8.9 m) long and 63 ft wide. If it were closed, the detour would be 8.7 mi (14 km).

Location

Open in Google Maps
CarriesUS-131|M-66|M-72|S
CrossesN Br Boardman River
LocationS Lts of Kalkaska
RouteU.S. Route 131
CountyKalkaska County
StateMichigan
Coordinates44.72615, -85.18221
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.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJune 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating59.6 US tons
Inventory rating35.7 US tons

Structure

Structure typeBox Beam or Girders - Single or Spread
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 25 or greater
Structure length29 ft (8.9 m)
Longest span28 ft (8.5 m)
Deck width63 ft (19.1 m)
Roadway width50 ft (15.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic8,567 (2007)
Projected traffic14,793 by 2018
Trucks7%
Lanes on structure3
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed8.7 mi (14 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|M-66|M-72|S over N Br Boardman River built?

It was built in 1940, making it 85 years old in 2025. It was reconstructed in 2000.

What condition is US-131|M-66|M-72|S over N Br Boardman 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 June 2023.

How much traffic does US-131|M-66|M-72|S over N Br Boardman River carry?

About 8,567 vehicles per day (2007 count), of which roughly 7% are trucks.

How long is US-131|M-66|M-72|S over N Br Boardman River?

The structure is 29 ft (8.9 m) long with a longest span of 28 ft (8.5 m) and a deck 63 ft wide.

Who owns US-131|M-66|M-72|S over N Br Boardman River?

It is owned by the State Highway Agency.