US Bridges

Grand Blanc RD over US-23

Fair

Genesee County, Michigan · 7.3 MI N of Fenton · Structure no. 000000000002482

Built
1957
68 years old, rebuilt 2005
Condition
Fair
inspected January 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
223 ft
4 main spans
Daily traffic
11,660
1996 count
Owner
State
State Highway Agency

About this bridge

Grand Blanc RD over US-23 is a steel stringer/multi-beam or girder carrying Grand Blanc RD over US-23 in Genesee County, Michigan. It was built in 1957 and reconstructed in 2005, so it is 68 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 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 11,660 vehicles a day, roughly 5% of them trucks, projected to reach 21,000 by 2016. The structure is 223 ft (67.9 m) long and 59 ft wide.

Location

Open in Google Maps
CarriesGrand Blanc RD
CrossesUS-23
Location7.3 MI N of Fenton
RouteCounty Highway 2002
CountyGenesee County
StateMichigan
Coordinates42.91473, -83.72586
Functional classUrban 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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJanuary 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating62.8 US tons
Inventory rating37.5 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans4
Design loadH 20
Structure length223 ft (67.9 m)
Longest span60 ft (18.2 m)
Deck width59 ft (18 m)
Roadway width56 ft (17.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic11,660 (1996)
Projected traffic21,000 by 2016
Trucks5%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed—
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 proposedDeck replacement with only incidental widening
Estimated improvement cost$226,000
NavigationNot applicable (no waterway)

Frequently asked questions

When was Grand Blanc RD over US-23 built?

It was built in 1957, making it 68 years old in 2025. It was reconstructed in 2005.

What condition is Grand Blanc RD over US-23 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 January 2024.

How much traffic does Grand Blanc RD over US-23 carry?

About 11,660 vehicles per day (1996 count), of which roughly 5% are trucks.

How long is Grand Blanc RD over US-23?

The structure is 223 ft (67.9 m) long with a longest span of 60 ft (18.2 m) and a deck 59 ft wide.

Who owns Grand Blanc RD over US-23?

It is owned by the State Highway Agency.