US Bridges

7 Mile Road over Little Muskegon River

Fair

Mecosta County, Michigan · 0.2 MI E of 100th Ave · Structure no. 000000000006780

Built
1990
35 years old
Condition
Fair
inspected August 2023
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
78 ft
1 main span
Daily traffic
1,511
2019 count
Owner
County
County Highway Agency

About this bridge

7 Mile Road over Little Muskegon River is a prestressed concrete box beam or girders - multiple carrying 7 Mile Road over Little Muskegon River in Mecosta County, Michigan. It was built in 1990, so it is 35 years old, younger 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 1,511 vehicles a day, roughly 6% of them trucks, projected to reach 1,750 by 2039. The structure is 78 ft (23.8 m) long and 40 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
Carries7 Mile Road
CrossesLittle Muskegon River
Location0.2 MI E of 100th Ave
RouteCounty Highway 0
CountyMecosta County
StateMichigan
Coordinates43.56897, -85.28099
Functional classRural Local

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure8 Very GoodNo problems noted.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionAugust 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating71.8 US tons
Inventory rating32.8 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length78 ft (23.8 m)
Longest span77 ft (23.4 m)
Deck width40 ft (12.3 m)
Roadway width38 ft (11.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,511 (2019)
Projected traffic1,750 by 2039
Trucks6%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.7 mi (6 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 7 Mile Road over Little Muskegon River built?

It was built in 1990, making it 35 years old in 2025.

What condition is 7 Mile Road over Little Muskegon 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 August 2023.

How much traffic does 7 Mile Road over Little Muskegon River carry?

About 1,511 vehicles per day (2019 count), of which roughly 6% are trucks.

How long is 7 Mile Road over Little Muskegon River?

The structure is 78 ft (23.8 m) long with a longest span of 77 ft (23.4 m) and a deck 40 ft wide.

Who owns 7 Mile Road over Little Muskegon River?

It is owned by the County Highway Agency.