US Bridges

M-85 SB over Marsh Creek

Fair

Wayne County, Michigan · .5 MI SW of Trenton · Structure no. 000000000011786

Built
1958
67 years old
Condition
Fair
inspected May 2024
Type
Slab
Concrete
Length
43 ft
1 main span
Daily traffic
15,575
2014 count
Owner
State
State Highway Agency

About this bridge

M-85 SB over Marsh Creek is a concrete slab carrying M-85 SB over Marsh Creek in Wayne County, Michigan. It was built in 1958, so it is 67 years old, older 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 5 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 15,575 vehicles a day, roughly 7% of them trucks, projected to reach 17,325 by 2036. The structure is 43 ft (13.1 m) long and 47 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesM-85 SB
CrossesMarsh Creek
Location.5 MI SW of Trenton
RouteState Highway 85
CountyWayne County
StateMichigan
Coordinates42.10668, -83.21954
Functional classUrban Other Principal 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.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionMay 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry9: Superior to present desirable criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating71.1 US tons
Inventory rating42.5 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20 + Mod
Structure length43 ft (13.1 m)
Longest span43 ft (13.1 m)
Deck width47 ft (14.2 m)
Roadway width43 ft (13.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic15,575 (2014)
Projected traffic17,325 by 2036
Trucks7%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemYes

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 M-85 SB over Marsh Creek built?

It was built in 1958, making it 67 years old in 2025.

What condition is M-85 SB over Marsh Creek 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 May 2024.

How much traffic does M-85 SB over Marsh Creek carry?

About 15,575 vehicles per day (2014 count), of which roughly 7% are trucks.

How long is M-85 SB over Marsh Creek?

The structure is 43 ft (13.1 m) long with a longest span of 43 ft (13.1 m) and a deck 47 ft wide.

Who owns M-85 SB over Marsh Creek?

It is owned by the State Highway Agency.