US Bridges

Souter Road over Barnard Drain

Good

Oakland County, Michigan · 0.2 MI S of Maple Road · Structure no. 000000000008310

Built
1974
51 years old
Condition
Good
inspected April 2023
Type
Culvert
Concrete Continuous
Length
30 ft
2 main spans
Daily traffic
950
1997 count
Owner
City
City or Municipal Highway Agency

About this bridge

Souter Road over Barnard Drain is a concrete continuous culvert carrying Souter Road over Barnard Drain in Oakland County, Michigan. It was built in 1974, so it is 51 years old, older than the Michigan average of 48.3 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 950 vehicles a day, roughly 15% of them trucks, projected to reach 3,000 by 2010. The structure is 30 ft (9 m) long. If it were closed, the detour would be 1.2 mi (2 km).

CarriesSouter Road
CrossesBarnard Drain
Location0.2 MI S of Maple Road
RouteCity Street 0
Coordinates42.5459, -83.12932
Functional classUrban Local

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Channel and channel protection7 GoodSome minor problems.
Culvert7 GoodSome minor problems.
Last inspectionApril 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation7: Better than present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating60.2 US tons
Inventory rating36 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckNot applicable
Main spans2
Design loadHS 20 + Mod
Structure length30 ft (9 m)
Longest span14 ft (4.3 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic950 (1997)
Projected traffic3,000 by 2010
Trucks15%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCity or Municipal Highway Agency
Maintained byCity or Municipal 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 Souter Road over Barnard Drain built?

It was built in 1974, making it 51 years old in 2025.

What condition is Souter Road over Barnard Drain in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in April 2023.

How much traffic does Souter Road over Barnard Drain carry?

About 950 vehicles per day (1997 count), of which roughly 15% are trucks.

How long is Souter Road over Barnard Drain?

The structure is 30 ft (9 m) long with a longest span of 14 ft (4.3 m).

Who owns Souter Road over Barnard Drain?

It is owned by the City or Municipal Highway Agency.