US Bridges

Flint River Road over South Br. Flint River

Fair

Lapeer County, Michigan · Sec. 11-12 Oregon Twp. · Structure no. 000000000005466

Built
1976
49 years old
Condition
Fair
inspected June 2024
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
63 ft
1 main span
Daily traffic
690
2019 count
Owner
County
County Highway Agency

About this bridge

Flint River Road over South Br. Flint River is a prestressed concrete box beam or girders - multiple carrying Flint River Road over South Br. Flint River in Lapeer County, Michigan. It was built in 1976, so it is 49 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 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 690 vehicles a day, roughly 5% of them trucks, projected to reach 842 by 2039. The structure is 63 ft (19.2 m) long and 31 ft wide. If it were closed, the detour would be 6.2 mi (10 km).

Location

Open in Google Maps
CarriesFlint River Road
CrossesSouth Br. Flint River
LocationSec. 11-12 Oregon Twp.
RouteCounty Highway 0
CountyLapeer County
StateMichigan
Coordinates43.123, -83.3668
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
Deck7 GoodSome minor problems.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJune 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to 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 rating66 US tons
Inventory rating39.7 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans1
Design loadHS 20
Structure length63 ft (19.2 m)
Longest span56 ft (17 m)
Deck width31 ft (9.3 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic690 (2019)
Projected traffic842 by 2039
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.2 mi (10 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 Flint River Road over South Br. Flint River built?

It was built in 1976, making it 49 years old in 2025.

What condition is Flint River Road over South Br. Flint 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 June 2024.

How much traffic does Flint River Road over South Br. Flint River carry?

About 690 vehicles per day (2019 count), of which roughly 5% are trucks.

How long is Flint River Road over South Br. Flint River?

The structure is 63 ft (19.2 m) long with a longest span of 56 ft (17 m) and a deck 31 ft wide.

Who owns Flint River Road over South Br. Flint River?

It is owned by the County Highway Agency.