US Bridges

Byron Road over Shiawassee River

Fair

Shiawassee County, Michigan · In Village of Byron · Structure no. 000000000012660

Built
1994
31 years old
Condition
Fair
inspected October 2024
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
101 ft
2 main spans
Daily traffic
2,452
2010 count
Owner
City
City or Municipal Highway Agency

About this bridge

Byron Road over Shiawassee River is a prestressed concrete box beam or girders - multiple carrying Byron Road over Shiawassee River in Shiawassee County, Michigan. It was built in 1994, so it is 31 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 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 2,452 vehicles a day, roughly 10% of them trucks, projected to reach 4,428 by 2030. The structure is 101 ft (30.7 m) long and 44 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

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CarriesByron Road
CrossesShiawassee River
LocationIn Village of Byron
RouteCity Street 51
CountyShiawassee County
StateMichigan
Coordinates42.818, -83.94258
Functional classRural Major Collector

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.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionOctober 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation7: Better than present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating110.1 US tons
Inventory rating92.6 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20
Structure length101 ft (30.7 m)
Longest span50 ft (15.2 m)
Deck width44 ft (13.3 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,452 (2010)
Projected traffic4,428 by 2030
Trucks10%
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

OwnerCity or Municipal Highway Agency
Maintained byCity or Municipal Highway Agency
Historic statusHistorical significance not determinable at this time
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Byron Road over Shiawassee River built?

It was built in 1994, making it 31 years old in 2025.

What condition is Byron Road over Shiawassee 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 October 2024.

How much traffic does Byron Road over Shiawassee River carry?

About 2,452 vehicles per day (2010 count), of which roughly 10% are trucks.

How long is Byron Road over Shiawassee River?

The structure is 101 ft (30.7 m) long with a longest span of 50 ft (15.2 m) and a deck 44 ft wide.

Who owns Byron Road over Shiawassee River?

It is owned by the City or Municipal Highway Agency.