US Bridges

Mowerson Road over Mcdonald Drain

Poor

Sanilac County, Michigan · Sec 7 Elk Twp · Structure no. 000000000013148

Built
1988
37 years old
Condition
Poor
inspected July 2024
Type
Culvert
Steel
Length
37 ft
2 main spans
Daily traffic
90
2010 count
Owner
County
County Highway Agency

About this bridge

Mowerson Road over Mcdonald Drain is a steel culvert carrying Mowerson Road over Mcdonald Drain in Sanilac County, Michigan. It was built in 1988, so it is 37 years old, younger than the Michigan average of 48.3 years.

The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

It carries about 90 vehicles a day, roughly 5% of them trucks, projected to reach 160 by 2030. The structure is 37 ft (11.3 m) long. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesMowerson Road
CrossesMcdonald Drain
LocationSec 7 Elk Twp
RouteCounty Highway 0
CountySanilac County
StateMichigan
Coordinates43.30353, -82.88461
Functional classRural Local

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

ComponentRatingMeaning
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert4 PoorAdvanced section loss, deterioration, spalling or scour.
Last inspectionJuly 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating38.9 US tons
Inventory rating31.4 US tons

Structure

Structure typeCulvert
MaterialSteel
DeckNot applicable
Main spans2
Design loadH 20
Structure length37 ft (11.3 m)
Longest span17 ft (5.2 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic90 (2010)
Projected traffic160 by 2030
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 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 Mowerson Road over Mcdonald Drain built?

It was built in 1988, making it 37 years old in 2025.

What condition is Mowerson Road over Mcdonald Drain in?

The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in July 2024.

How much traffic does Mowerson Road over Mcdonald Drain carry?

About 90 vehicles per day (2010 count), of which roughly 5% are trucks.

How long is Mowerson Road over Mcdonald Drain?

The structure is 37 ft (11.3 m) long with a longest span of 17 ft (5.2 m).

Who owns Mowerson Road over Mcdonald Drain?

It is owned by the County Highway Agency.