US Bridges

I-75 NB over North Huron River Drive

Good

Wayne County, Michigan · In Rockwood · Structure no. 000000000011642

Built
2008
17 years old
Condition
Good
inspected July 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
154 ft
3 main spans
Daily traffic
62,588
2007 count
Owner
State
State Highway Agency

About this bridge

I-75 NB over North Huron River Drive is a steel stringer/multi-beam or girder carrying I-75 NB over North Huron River Drive in Wayne County, Michigan. It was built in 2008, so it is 17 years old, younger 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 62,588 vehicles a day, roughly 21% of them trucks, projected to reach 40,250 by 2028. The structure is 154 ft (47 m) long and 73 ft wide. If it were closed, the detour would be 6.2 mi (10 km).

Location

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CarriesI-75 NB
CrossesNorth Huron River Drive
LocationIn Rockwood
RouteInterstate 75
CountyWayne County
StateMichigan
Coordinates42.07019, -83.25229
Functional classUrban Principal Arterial - Interstate

Condition and inspection

Good

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

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Last inspectionJuly 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation8: Equal to present desirable criteria
Deck geometry7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating75 US tons
Inventory rating57.9 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans3
Design loadGreater than HL 93
Structure length154 ft (47 m)
Longest span74 ft (22.5 m)
Deck width73 ft (22.4 m)
Roadway width70 ft (21.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic62,588 (2007)
Projected traffic40,250 by 2028
Trucks21%
Lanes on structure4
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed6.2 mi (10 km)
TollOn a free road
National Highway SystemYes
Strategic Highway NetworkInterstate STRAHNET route

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNot applicable (no waterway)

Frequently asked questions

When was I-75 NB over North Huron River Drive built?

It was built in 2008, making it 17 years old in 2025.

What condition is I-75 NB over North Huron River Drive 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 July 2024.

How much traffic does I-75 NB over North Huron River Drive carry?

About 62,588 vehicles per day (2007 count), of which roughly 21% are trucks.

How long is I-75 NB over North Huron River Drive?

The structure is 154 ft (47 m) long with a longest span of 74 ft (22.5 m) and a deck 73 ft wide.

Who owns I-75 NB over North Huron River Drive?

It is owned by the State Highway Agency.