US Bridges

US-131 NB over Clam River

Good

Wexford County, Michigan · 0.1 MI S of Boon Road · Structure no. 000000000012953

Built
2000
25 years old
Condition
Good
inspected July 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
65 ft
1 main span
Daily traffic
4,255
2007 count
Owner
State
State Highway Agency

About this bridge

US-131 NB over Clam River is a prestressed concrete stringer/multi-beam or girder carrying US-131 NB over Clam River in Wexford County, Michigan. It was built in 2000, so it is 25 years old, younger than the Michigan average of 48.3 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 4,255 vehicles a day, roughly 11% of them trucks, projected to reach 3,375 by 2018. The structure is 65 ft (19.8 m) long and 59 ft wide.

CarriesUS-131 NB
CrossesClam River
Location0.1 MI S of Boon Road
RouteU.S. Route 131
Coordinates44.28007, -85.38849
Functional classRural Principal Arterial - Other

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck8 Very GoodNo problems noted.
Superstructure8 Very GoodNo problems noted.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJuly 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry9: Superior to present desirable criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating71.4 US tons
Inventory rating36.8 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 25 or greater
Structure length65 ft (19.8 m)
Longest span63 ft (19.2 m)
Deck width59 ft (18.1 m)
Roadway width56 ft (17.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic4,255 (2007)
Projected traffic3,375 by 2018
Trucks11%
Lanes on structure3
Traffic directionOne-way traffic
CarriesHighway
CrossesWaterway
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—
NavigationNo navigation control on waterway

Frequently asked questions

When was US-131 NB over Clam River built?

It was built in 2000, making it 25 years old in 2025.

What condition is US-131 NB over Clam River in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in July 2023.

How much traffic does US-131 NB over Clam River carry?

About 4,255 vehicles per day (2007 count), of which roughly 11% are trucks.

How long is US-131 NB over Clam River?

The structure is 65 ft (19.8 m) long with a longest span of 63 ft (19.2 m) and a deck 59 ft wide.

Who owns US-131 NB over Clam River?

It is owned by the State Highway Agency.