US Bridges

Petersburg Road over Milan Center Drain

Fair

Monroe County, Michigan · .39 MI N of Cone Road · Structure no. 000000000007381

Built
1980
45 years old
Condition
Fair
inspected October 2024
Type
Culvert
Concrete
Length
24 ft
2 main spans
Daily traffic
80
2016 count
Owner
County
County Highway Agency

About this bridge

Petersburg Road over Milan Center Drain is a concrete culvert carrying Petersburg Road over Milan Center Drain in Monroe County, Michigan. It was built in 1980, so it is 45 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 80 vehicles a day, roughly 1% of them trucks, projected to reach 92 by 2036. The structure is 24 ft (7.3 m) long. If it were closed, the detour would be 3.7 mi (6 km).

Location

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CarriesPetersburg Road
CrossesMilan Center Drain
Location.39 MI N of Cone Road
RouteCounty Highway 0
CountyMonroe County
StateMichigan
Coordinates42.03903, -83.71396
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 protection4 PoorAdvanced section loss, deterioration, spalling or scour.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionOctober 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 rating71.8 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans2
Design loadHS 20
Structure length24 ft (7.3 m)
Longest span10 ft (3.1 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic80 (2016)
Projected traffic92 by 2036
Trucks1%
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 Petersburg Road over Milan Center Drain built?

It was built in 1980, making it 45 years old in 2025.

What condition is Petersburg Road over Milan Center 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 October 2024.

How much traffic does Petersburg Road over Milan Center Drain carry?

About 80 vehicles per day (2016 count), of which roughly 1% are trucks.

How long is Petersburg Road over Milan Center Drain?

The structure is 24 ft (7.3 m) long with a longest span of 10 ft (3.1 m).

Who owns Petersburg Road over Milan Center Drain?

It is owned by the County Highway Agency.