US Bridges

Marathon Road over Flint River

Good

Lapeer County, Michigan · Village of Columbiaville · Structure no. 000000000005480

Built
2015
10 years old
Condition
Good
inspected October 2023
Type
Box Beam or Girders - Single or Spread
Prestressed Concrete
Length
165 ft
3 main spans
Daily traffic
1,491
2013 count
Owner
City
City or Municipal Highway Agency

About this bridge

Marathon Road over Flint River is a prestressed concrete box beam or girders - single or spread carrying Marathon Road over Flint River in Lapeer County, Michigan. It was built in 2015, so it is 10 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 1,491 vehicles a day, roughly 5% of them trucks, projected to reach 2,693 by 2033. The structure is 165 ft (50.3 m) long and 37 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
CarriesMarathon Road
CrossesFlint River
LocationVillage of Columbiaville
RouteCity Street 0
CountyLapeer County
StateMichigan
Coordinates43.15934, -83.40812
Functional classRural Minor Collector

Condition and inspection

Good

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

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionOctober 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation8: Equal to present desirable criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating76.8 US tons
Inventory rating59.3 US tons

Structure

Structure typeBox Beam or Girders - Single or Spread
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans3
Design loadGreater than HL 93
Structure length165 ft (50.3 m)
Longest span54 ft (16.4 m)
Deck width37 ft (11.2 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,491 (2013)
Projected traffic2,693 by 2033
Trucks5%
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

OwnerCity or Municipal Highway Agency
Maintained byCity or Municipal 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 Marathon Road over Flint River built?

It was built in 2015, making it 10 years old in 2025.

What condition is Marathon Road over Flint 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 Marathon Road over Flint River carry?

About 1,491 vehicles per day (2013 count), of which roughly 5% are trucks.

How long is Marathon Road over Flint River?

The structure is 165 ft (50.3 m) long with a longest span of 54 ft (16.4 m) and a deck 37 ft wide.

Who owns Marathon Road over Flint River?

It is owned by the City or Municipal Highway Agency.