US Bridges

US-23 NB over Swartz Creek

Fair

Genesee County, Michigan · 2.5 MI S of Flint · Structure no. 000000000002469

Built
1957
68 years old, rebuilt 2002
Condition
Fair
inspected October 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
129 ft
3 main spans
Daily traffic
28,675
2019 count
Owner
State
State Highway Agency

About this bridge

US-23 NB over Swartz Creek is a steel stringer/multi-beam or girder carrying US-23 NB over Swartz Creek in Genesee County, Michigan. It was built in 1957 and reconstructed in 2002, 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 28,675 vehicles a day, roughly 9% of them trucks, projected to reach 32,000 by 2041. The structure is 129 ft (39.3 m) long and 47 ft wide.

Location

Open in Google Maps
CarriesUS-23 NB
CrossesSwartz Creek
Location2.5 MI S of Flint
RouteU.S. Route 23
CountyGenesee County
StateMichigan
Coordinates42.93034, -83.72414
Functional classUrban Principal Arterial - Other Freeway or Expressway

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.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionOctober 2024
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 rating107.1 US tons
Inventory rating72.5 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans3
Design loadHS 25 or greater
Structure length129 ft (39.3 m)
Longest span44 ft (13.5 m)
Deck width47 ft (14.3 m)
Roadway width44 ft (13.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic28,675 (2019)
Projected traffic32,000 by 2041
Trucks9%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesWaterway
Detour if closed—
TollOn a free road
National Highway SystemYes
Strategic Highway NetworkNon-Interstate STRAHNET route

Ownership and planned work

OwnerState Highway Agency
Maintained byState 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 US-23 NB over Swartz Creek built?

It was built in 1957, making it 68 years old in 2025. It was reconstructed in 2002.

What condition is US-23 NB over Swartz Creek 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 October 2024.

How much traffic does US-23 NB over Swartz Creek carry?

About 28,675 vehicles per day (2019 count), of which roughly 9% are trucks.

How long is US-23 NB over Swartz Creek?

The structure is 129 ft (39.3 m) long with a longest span of 44 ft (13.5 m) and a deck 47 ft wide.

Who owns US-23 NB over Swartz Creek?

It is owned by the State Highway Agency.