US Bridges

Leaton Road over Little Salt River

Fair

Isabella County, Michigan · 0.5 M S NW Cor Sec 29 Coe · Structure no. 000000000004333

Built
1970
55 years old
Condition
Fair
inspected May 2024
Type
Culvert
Steel
Length
30 ft
2 main spans
Daily traffic
181
2002 count
Owner
County
County Highway Agency

About this bridge

Leaton Road over Little Salt River is a steel culvert carrying Leaton Road over Little Salt River in Isabella County, Michigan. It was built in 1970, so it is 55 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 181 vehicles a day, projected to reach 220 by 2022. The structure is 30 ft (9.2 m) long. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesLeaton Road
CrossesLittle Salt River
Location0.5 M S NW Cor Sec 29 Coe
RouteCounty Highway 0
CountyIsabella County
StateMichigan
Coordinates43.48675, -84.70729
Functional classRural Local

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionMay 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; action required to protect exposed foundations
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment7: Better than present minimum criteria
Operating rating48.1 US tons
Inventory rating36 US tons

Structure

Structure typeCulvert
MaterialSteel
DeckNot applicable
Main spans2
Design loadH 20
Structure length30 ft (9.2 m)
Longest span14 ft (4.2 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic181 (2002)
Projected traffic220 by 2022
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.1 mi (5 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 proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Leaton Road over Little Salt River built?

It was built in 1970, making it 55 years old in 2025.

What condition is Leaton Road over Little Salt 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 May 2024.

How much traffic does Leaton Road over Little Salt River carry?

About 181 vehicles per day (2002 count).

How long is Leaton Road over Little Salt River?

The structure is 30 ft (9.2 m) long with a longest span of 14 ft (4.2 m).

Who owns Leaton Road over Little Salt River?

It is owned by the County Highway Agency.