US Bridges

Sterling Road over Soap Creek

Fair

Hillsdale County, Michigan · 0.2 Mile E of Squires RD · Structure no. 000000000003301

Built
1965
60 years old
Condition
Fair
inspected November 2024
Type
Culvert
Steel
Length
23 ft
2 main spans
Daily traffic
418
2013 count
Owner
County
County Highway Agency

About this bridge

Sterling Road over Soap Creek is a steel culvert carrying Sterling Road over Soap Creek in Hillsdale County, Michigan. It was built in 1965, so it is 60 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 418 vehicles a day, projected to reach 686 by 2038. The structure is 23 ft (7 m) long. If it were closed, the detour would be 3.1 mi (5 km).

Location

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CarriesSterling Road
CrossesSoap Creek
Location0.2 Mile E of Squires RD
RouteCounty Highway 0
CountyHillsdale County
StateMichigan
Coordinates42.01478, -84.8221
Functional classRural Minor 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
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Culvert5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionNovember 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
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating107.1 US tons
Inventory rating107.1 US tons

Structure

Structure typeCulvert
MaterialSteel
DeckNot applicable
Main spans2
Design loadHS 20 + Mod
Structure length23 ft (7 m)
Longest span10 ft (3 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic418 (2013)
Projected traffic686 by 2038
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 Sterling Road over Soap Creek built?

It was built in 1965, making it 60 years old in 2025.

What condition is Sterling Road over Soap 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 November 2024.

How much traffic does Sterling Road over Soap Creek carry?

About 418 vehicles per day (2013 count).

How long is Sterling Road over Soap Creek?

The structure is 23 ft (7 m) long with a longest span of 10 ft (3 m).

Who owns Sterling Road over Soap Creek?

It is owned by the County Highway Agency.