US Bridges

General Motors RD over Huron River

Fair

Oakland County, Michigan · Bet Martindale and Garner · Structure no. 000000000008178

Built
1985
40 years old
Condition
Fair
inspected June 2024
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
64 ft
1 main span
Daily traffic
12,300
2014 count
Owner
County
County Highway Agency

About this bridge

General Motors RD over Huron River is a prestressed concrete box beam or girders - multiple carrying General Motors RD over Huron River in Oakland County, Michigan. It was built in 1985, so it is 40 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 12,300 vehicles a day, roughly 3% of them trucks, projected to reach 16,548 by 2031. The structure is 64 ft (19.5 m) long and 44 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

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CarriesGeneral Motors RD
CrossesHuron River
LocationBet Martindale and Garner
RouteCounty Highway 2059
CountyOakland County
StateMichigan
Coordinates42.57928, -83.62663
Functional classUrban Minor Arterial

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJune 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation7: Better than present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating65 US tons
Inventory rating32.8 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20 + Mod
Structure length64 ft (19.5 m)
Longest span63 ft (19.2 m)
Deck width44 ft (13.4 m)
Roadway width40 ft (12.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic12,300 (2014)
Projected traffic16,548 by 2031
Trucks3%
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 General Motors RD over Huron River built?

It was built in 1985, making it 40 years old in 2025.

What condition is General Motors RD over Huron River 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 June 2024.

How much traffic does General Motors RD over Huron River carry?

About 12,300 vehicles per day (2014 count), of which roughly 3% are trucks.

How long is General Motors RD over Huron River?

The structure is 64 ft (19.5 m) long with a longest span of 63 ft (19.2 m) and a deck 44 ft wide.

Who owns General Motors RD over Huron River?

It is owned by the County Highway Agency.