US Bridges

Harrington Road over Potts Drain

Fair

Sanilac County, Michigan · Sec 19-30 Buel Twp · Structure no. 000000000009577

Built
1991
34 years old
Condition
Fair
inspected May 2024
Type
Culvert
Steel
Length
24 ft
2 main spans
Daily traffic
225
2010 count
Owner
County
County Highway Agency

About this bridge

Harrington Road over Potts Drain is a steel culvert carrying Harrington Road over Potts Drain in Sanilac County, Michigan. It was built in 1991, so it is 34 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 225 vehicles a day, roughly 7% of them trucks, projected to reach 400 by 2030. The structure is 24 ft (7.3 m) long. If it were closed, the detour would be 5 mi (8 km).

Location

Open in Google Maps
CarriesHarrington Road
CrossesPotts Drain
LocationSec 19-30 Buel Twp
RouteCounty Highway 0
CountySanilac County
StateMichigan
Coordinates43.2746, -82.75893
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.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMay 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating107.1 US tons
Inventory rating107.1 US tons

Structure

Structure typeCulvert
MaterialSteel
DeckCorrugated steel
Main spans2
Design loadH 20
Structure length24 ft (7.3 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 traffic225 (2010)
Projected traffic400 by 2030
Trucks7%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed5 mi (8 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 Harrington Road over Potts Drain built?

It was built in 1991, making it 34 years old in 2025.

What condition is Harrington Road over Potts 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 May 2024.

How much traffic does Harrington Road over Potts Drain carry?

About 225 vehicles per day (2010 count), of which roughly 7% are trucks.

How long is Harrington Road over Potts Drain?

The structure is 24 ft (7.3 m) long with a longest span of 10 ft (3 m).

Who owns Harrington Road over Potts Drain?

It is owned by the County Highway Agency.