US Bridges

US-131 NB over 6 Mile RD

Fair

Kent County, Michigan · 2.4 MI N of I-96 · Structure no. 000000000004990

Built
1969
56 years old, rebuilt 1998
Condition
Fair
inspected October 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
112 ft
3 main spans
Daily traffic
29,425
2007 count
Owner
State
State Highway Agency

About this bridge

US-131 NB over 6 Mile RD is a prestressed concrete stringer/multi-beam or girder carrying US-131 NB over 6 Mile RD in Kent County, Michigan. It was built in 1969 and reconstructed in 1998, so it is 56 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 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 29,425 vehicles a day, roughly 9% of them trucks, projected to reach 32,474 by 2018. The structure is 112 ft (34.2 m) long and 61 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesUS-131 NB
Crosses6 Mile RD
Location2.4 MI N of I-96
RouteU.S. Route 131
Coordinates43.05803, -85.66269
Functional classUrban Principal Arterial - Other Freeway or Expressway

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.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionOctober 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry9: Superior to present desirable criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating62.5 US tons
Inventory rating29.7 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length112 ft (34.2 m)
Longest span45 ft (13.7 m)
Deck width61 ft (18.5 m)
Roadway width57 ft (17.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic29,425 (2007)
Projected traffic32,474 by 2018
Trucks9%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed1.2 mi (2 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—
NavigationNot applicable (no waterway)

Frequently asked questions

When was US-131 NB over 6 Mile RD built?

It was built in 1969, making it 56 years old in 2025. It was reconstructed in 1998.

What condition is US-131 NB over 6 Mile RD 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 October 2023.

How much traffic does US-131 NB over 6 Mile RD carry?

About 29,425 vehicles per day (2007 count), of which roughly 9% are trucks.

How long is US-131 NB over 6 Mile RD?

The structure is 112 ft (34.2 m) long with a longest span of 45 ft (13.7 m) and a deck 61 ft wide.

Who owns US-131 NB over 6 Mile RD?

It is owned by the State Highway Agency.