US Bridges

M-85 (fort ST ) over M-10

Fair

Wayne County, Michigan · In Detroit · Structure no. 000000000011397

Built
1958
67 years old, rebuilt 1994
Condition
Fair
inspected November 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
110 ft
2 main spans
Daily traffic
10,191
2007 count
Owner
State
State Highway Agency

About this bridge

M-85 (fort ST ) over M-10 is a steel continuous stringer/multi-beam or girder carrying M-85 (fort ST ) over M-10 in Wayne County, Michigan. It was built in 1958 and reconstructed in 1994, 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 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 10,191 vehicles a day, roughly 32% of them trucks, projected to reach 10,357 by 2018. The structure is 110 ft (33.6 m) long and 101 ft wide.

Location

Open in Google Maps
CarriesM-85 (fort ST )
CrossesM-10
LocationIn Detroit
RouteState Highway 85
CountyWayne County
StateMichigan
Coordinates42.3272, -83.05556
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.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionNovember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Approach roadway alignment8: Equal to present desirable criteria
Operating rating77.2 US tons
Inventory rating40.7 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20
Structure length110 ft (33.6 m)
Longest span55 ft (16.7 m)
Deck width101 ft (30.9 m)
Roadway width73 ft (22.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic10,191 (2007)
Projected traffic10,357 by 2018
Trucks32%
Lanes on structure6
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesHighway
Detour if closed—
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 proposedDeck replacement with only incidental widening
Estimated improvement cost—
NavigationNot applicable (no waterway)

Frequently asked questions

When was M-85 (fort ST ) over M-10 built?

It was built in 1958, making it 67 years old in 2025. It was reconstructed in 1994.

What condition is M-85 (fort ST ) over M-10 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 November 2023.

How much traffic does M-85 (fort ST ) over M-10 carry?

About 10,191 vehicles per day (2007 count), of which roughly 32% are trucks.

How long is M-85 (fort ST ) over M-10?

The structure is 110 ft (33.6 m) long with a longest span of 55 ft (16.7 m) and a deck 101 ft wide.

Who owns M-85 (fort ST ) over M-10?

It is owned by the State Highway Agency.