US Bridges

Stilson Road over Mcdonald Drain

Fair

Sanilac County, Michigan · Sec 8-17 Elk Twp · Structure no. 000000000009595

Built
1981
44 years old
Condition
Fair
inspected July 2024
Type
Culvert
Steel
Length
44 ft
2 main spans
Daily traffic
230
2010 count
Owner
County
County Highway Agency

About this bridge

Stilson Road over Mcdonald Drain is a steel culvert carrying Stilson Road over Mcdonald Drain in Sanilac County, Michigan. It was built in 1981, so it is 44 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 230 vehicles a day, roughly 10% of them trucks, projected to reach 415 by 2030. The structure is 44 ft (13.4 m) long. If it were closed, the detour would be 3.7 mi (6 km).

Location

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CarriesStilson Road
CrossesMcdonald Drain
LocationSec 8-17 Elk Twp
RouteCounty Highway 0
CountySanilac County
StateMichigan
Coordinates43.30124, -82.8619
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 protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJuly 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating107.1 US tons
Inventory rating92.8 US tons

Structure

Structure typeCulvert
MaterialSteel
DeckNot applicable
Main spans2
Design loadH 20
Structure length44 ft (13.4 m)
Longest span20 ft (6.2 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic230 (2010)
Projected traffic415 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

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 Stilson Road over Mcdonald Drain built?

It was built in 1981, making it 44 years old in 2025.

What condition is Stilson Road over Mcdonald Drain 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 July 2024.

How much traffic does Stilson Road over Mcdonald Drain carry?

About 230 vehicles per day (2010 count), of which roughly 10% are trucks.

How long is Stilson Road over Mcdonald Drain?

The structure is 44 ft (13.4 m) long with a longest span of 20 ft (6.2 m).

Who owns Stilson Road over Mcdonald Drain?

It is owned by the County Highway Agency.