US Bridges

Irish Road over Flint River

Good

Genesee County, Michigan · Bet Coldwater & Stanley · Structure no. 000000000002754

Built
2008
17 years old
Condition
Good
inspected November 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
160 ft
2 main spans
Daily traffic
4,747
2018 count
Owner
County
County Highway Agency

About this bridge

Irish Road over Flint River is a prestressed concrete stringer/multi-beam or girder carrying Irish Road over Flint River in Genesee County, Michigan. It was built in 2008, so it is 17 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 4,747 vehicles a day, roughly 3% of them trucks, projected to reach 8,574 by 2038. The structure is 160 ft (48.8 m) long and 43 ft wide. If it were closed, the detour would be 8.7 mi (14 km).

Location

Open in Google Maps
CarriesIrish Road
CrossesFlint River
LocationBet Coldwater & Stanley
RouteCounty Highway 2579
CountyGenesee County
StateMichigan
Coordinates43.10245, -83.55807
Functional classRural Major 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 protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionNovember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation8: Equal to present desirable criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating107.1 US tons
Inventory rating89.6 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20 + Mod
Structure length160 ft (48.8 m)
Longest span73 ft (22.2 m)
Deck width43 ft (13.2 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic4,747 (2018)
Projected traffic8,574 by 2038
Trucks3%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed8.7 mi (14 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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$1.4 million
NavigationNo navigation control on waterway

Frequently asked questions

When was Irish Road over Flint River built?

It was built in 2008, making it 17 years old in 2025.

What condition is Irish 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 November 2024.

How much traffic does Irish Road over Flint River carry?

About 4,747 vehicles per day (2018 count), of which roughly 3% are trucks.

How long is Irish Road over Flint River?

The structure is 160 ft (48.8 m) long with a longest span of 73 ft (22.2 m) and a deck 43 ft wide.

Who owns Irish Road over Flint River?

It is owned by the County Highway Agency.