US Bridges

Downington Road over Middle Br Drain

Fair

Sanilac County, Michigan · Sec 35 Argyle Twp · Structure no. 000000000009562

Built
1969
56 years old
Condition
Fair
inspected April 2024
Type
Culvert
Steel
Length
27 ft
1 main span
Daily traffic
180
2010 count
Owner
County
County Highway Agency

About this bridge

Downington Road over Middle Br Drain is a steel culvert carrying Downington Road over Middle Br Drain in Sanilac County, Michigan. It was built in 1969, so it is 56 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 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 180 vehicles a day, roughly 10% of them trucks, projected to reach 325 by 2030. The structure is 27 ft (8.2 m) long. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
CarriesDownington Road
CrossesMiddle Br Drain
LocationSec 35 Argyle Twp
RouteCounty Highway 0
CountySanilac County
StateMichigan
Coordinates43.50739, -82.90339
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 protection7 GoodSome minor problems.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionApril 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating50.7 US tons
Inventory rating30.3 US tons

Structure

Structure typeCulvert
MaterialSteel
DeckNot applicable
Main spans1
Design loadH 20
Structure length27 ft (8.2 m)
Longest span27 ft (8.2 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic180 (2010)
Projected traffic325 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 Downington Road over Middle Br Drain built?

It was built in 1969, making it 56 years old in 2025.

What condition is Downington Road over Middle Br 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 April 2024.

How much traffic does Downington Road over Middle Br Drain carry?

About 180 vehicles per day (2010 count), of which roughly 10% are trucks.

How long is Downington Road over Middle Br Drain?

The structure is 27 ft (8.2 m) long with a longest span of 27 ft (8.2 m).

Who owns Downington Road over Middle Br Drain?

It is owned by the County Highway Agency.