US Bridges

M-24 over N Br Flint River

Fair

Lapeer County, Michigan · 0.6 MI S of M-90 · Structure no. 000000000005303

Built
1983
42 years old
Condition
Fair
inspected May 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
90 ft
1 main span
Daily traffic
11,544
2007 count
Owner
State
State Highway Agency

About this bridge

M-24 over N Br Flint River is a steel stringer/multi-beam or girder carrying M-24 over N Br Flint River in Lapeer County, Michigan. It was built in 1983, so it is 42 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 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 11,544 vehicles a day, roughly 5% of them trucks, projected to reach 17,531 by 2018. The structure is 90 ft (27.4 m) long and 52 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
CarriesM-24
CrossesN Br Flint River
Location0.6 MI S of M-90
RouteState Highway 24
CountyLapeer County
StateMichigan
Coordinates43.21096, -83.31429
Functional classRural Minor Arterial

Condition and inspection

Fair

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

ComponentRatingMeaning
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionMay 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry9: Superior to present desirable criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating96.1 US tons
Inventory rating57.5 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadHS 25 or greater
Structure length90 ft (27.4 m)
Longest span90 ft (27.4 m)
Deck width52 ft (15.8 m)
Roadway width48 ft (14.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic11,544 (2007)
Projected traffic17,531 by 2018
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

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedWidening of existing bridge without deck rehabilitation
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was M-24 over N Br Flint River built?

It was built in 1983, making it 42 years old in 2025.

What condition is M-24 over N 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 May 2023.

How much traffic does M-24 over N Br Flint River carry?

About 11,544 vehicles per day (2007 count), of which roughly 5% are trucks.

How long is M-24 over N Br Flint River?

The structure is 90 ft (27.4 m) long with a longest span of 90 ft (27.4 m) and a deck 52 ft wide.

Who owns M-24 over N Br Flint River?

It is owned by the State Highway Agency.