US Bridges

Leroy Street over Shiawassee River

Good

Genesee County, Michigan · By Fenton Municipal Bld · Structure no. 000000000002516

Built
1906
119 years old, rebuilt 1958
Condition
Good
inspected September 2023
Type
Arch - Deck
Concrete
Length
26 ft
1 main span
Daily traffic
10,918
2020 count
Owner
City
City or Municipal Highway Agency

About this bridge

Leroy Street over Shiawassee River is a concrete arch - deck carrying Leroy Street over Shiawassee River in Genesee County, Michigan. It was built in 1906 and reconstructed in 1958, so it is 119 years old, older 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 10,918 vehicles a day, roughly 8% of them trucks, projected to reach 12,500 by 2040. The structure is 26 ft (8 m) long and 67 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

CarriesLeroy Street
CrossesShiawassee River
LocationBy Fenton Municipal Bld
RouteCity Street 0
Coordinates42.79473, -83.70485
Functional classUrban Minor Arterial

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.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionSeptember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation7: Better than present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating60.1 US tons
Inventory rating36 US tons

Structure

Structure typeArch - Deck
MaterialConcrete
DeckNot applicable
Main spans1
Design loadH 10
Structure length26 ft (8 m)
Longest span26 ft (8 m)
Deck width67 ft (20.5 m)
Roadway width42 ft (12.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic10,918 (2020)
Projected traffic12,500 by 2040
Trucks8%
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 statusNot eligible for the National Register of Historic Places
Work proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$800,000
NavigationNo navigation control on waterway

Frequently asked questions

When was Leroy Street over Shiawassee River built?

It was built in 1906, making it 119 years old in 2025. It was reconstructed in 1958.

What condition is Leroy Street over Shiawassee 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 September 2023.

How much traffic does Leroy Street over Shiawassee River carry?

About 10,918 vehicles per day (2020 count), of which roughly 8% are trucks.

How long is Leroy Street over Shiawassee River?

The structure is 26 ft (8 m) long with a longest span of 26 ft (8 m) and a deck 67 ft wide.

Who owns Leroy Street over Shiawassee River?

It is owned by the City or Municipal Highway Agency.