US Bridges

M-46 over Rogue River

Good

Kent County, Michigan · 3.0 MI E of Kent City · Structure no. 000000000004936

Built
2000
25 years old
Condition
Good
inspected October 2023
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
68 ft
1 main span
Daily traffic
5,475
2007 count
Owner
State
State Highway Agency

About this bridge

M-46 over Rogue River is a prestressed concrete box beam or girders - multiple carrying M-46 over Rogue River in Kent 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 5,475 vehicles a day, roughly 10% of them trucks, projected to reach 5,607 by 2018. The structure is 68 ft (20.7 m) long and 47 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesM-46
CrossesRogue River
Location3.0 MI E of Kent City
RouteState Highway 46
CountyKent County
StateMichigan
Coordinates43.2198, -85.68836
Functional classRural Minor Arterial

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.
Superstructure7 GoodSome minor problems.
Substructure8 Very GoodNo problems noted.
Channel and channel protection7 GoodSome minor problems.
Last inspectionOctober 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation7: Better than 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 rating102.2 US tons
Inventory rating61.1 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 25 or greater
Structure length68 ft (20.7 m)
Longest span63 ft (19.2 m)
Deck width47 ft (14.3 m)
Roadway width44 ft (13.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic5,475 (2007)
Projected traffic5,607 by 2018
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.1 mi (5 km)
TollOn a free road
National Highway SystemNo

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 M-46 over Rogue River built?

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

What condition is M-46 over Rogue 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 October 2023.

How much traffic does M-46 over Rogue River carry?

About 5,475 vehicles per day (2007 count), of which roughly 10% are trucks.

How long is M-46 over Rogue River?

The structure is 68 ft (20.7 m) long with a longest span of 63 ft (19.2 m) and a deck 47 ft wide.

Who owns M-46 over Rogue River?

It is owned by the State Highway Agency.