US Bridges

M-85 (fort St) over Norfolk Western RR

Good

Wayne County, Michigan · Fort ST · Structure no. 000000000012347

Built
2010
15 years old
Condition
Good
inspected May 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
393 ft
3 main spans
Daily traffic
5,981
2007 count
Owner
State
State Highway Agency

About this bridge

M-85 (fort St) over Norfolk Western RR is a steel continuous stringer/multi-beam or girder carrying M-85 (fort St) over Norfolk Western RR in Wayne County, Michigan. It was built in 2010, so it is 15 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 5,981 vehicles a day, roughly 12% of them trucks, projected to reach 8,000 by 2028. The structure is 393 ft (119.9 m) long and 106 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

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CarriesM-85 (fort St)
CrossesNorfolk Western RR
LocationFort ST
RouteState Highway 85
CountyWayne County
StateMichigan
Coordinates42.28466, -83.14821
Functional classUrban Other Principal Arterial

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.
Substructure7 GoodSome minor problems.
Last inspectionMay 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating85 US tons
Inventory rating51 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadGreater than HL 93
Structure length393 ft (119.9 m)
Longest span153 ft (46.7 m)
Deck width106 ft (32.3 m)
Roadway width80 ft (24.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic5,981 (2007)
Projected traffic8,000 by 2028
Trucks12%
Lanes on structure6
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesRailroad
Detour if closed1.9 mi (3 km)
TollOn a free road
National Highway SystemYes

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusPossibly eligible for the National Register; requires further investigation
Work proposedNone recorded
Estimated improvement cost—
NavigationNot applicable (no waterway)

Frequently asked questions

When was M-85 (fort St) over Norfolk Western RR built?

It was built in 2010, making it 15 years old in 2025.

What condition is M-85 (fort St) over Norfolk Western RR 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 May 2024.

How much traffic does M-85 (fort St) over Norfolk Western RR carry?

About 5,981 vehicles per day (2007 count), of which roughly 12% are trucks.

How long is M-85 (fort St) over Norfolk Western RR?

The structure is 393 ft (119.9 m) long with a longest span of 153 ft (46.7 m) and a deck 106 ft wide.

Who owns M-85 (fort St) over Norfolk Western RR?

It is owned by the State Highway Agency.