US Bridges

I-75 & M-85 NB over Smith Creek

Good

Wayne County, Michigan · 1.5 MI N of N Huron Ri DR · Structure no. 000000000011633

Built
2008
17 years old
Condition
Good
inspected July 2024
Type
Culvert
Concrete
Length
22 ft
1 main span
Daily traffic
28,645
2007 count
Owner
State
State Highway Agency

About this bridge

I-75 & M-85 NB over Smith Creek is a concrete culvert carrying I-75 & M-85 NB over Smith Creek 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 28,645 vehicles a day, roughly 19% of them trucks, projected to reach 95,990 by 2028. The structure is 22 ft (6.7 m) long.

Location

Open in Google Maps
CarriesI-75 & M-85 NB
CrossesSmith Creek
Location1.5 MI N of N Huron Ri DR
RouteInterstate 75
CountyWayne County
StateMichigan
Coordinates42.08289, -83.24221
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
Channel and channel protection7 GoodSome minor problems.
Culvert7 GoodSome minor problems.
Last inspectionJuly 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
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating107.1 US tons
Inventory rating105.1 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans1
Design loadGreater than HL 93
Structure length22 ft (6.7 m)
Longest span21 ft (6.3 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic28,645 (2007)
Projected traffic95,990 by 2028
Trucks19%
Lanes on structure7
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed—
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—
NavigationNo navigation control on waterway

Frequently asked questions

When was I-75 & M-85 NB over Smith Creek built?

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

What condition is I-75 & M-85 NB over Smith Creek 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 & M-85 NB over Smith Creek carry?

About 28,645 vehicles per day (2007 count), of which roughly 19% are trucks.

How long is I-75 & M-85 NB over Smith Creek?

The structure is 22 ft (6.7 m) long with a longest span of 21 ft (6.3 m).

Who owns I-75 & M-85 NB over Smith Creek?

It is owned by the State Highway Agency.