US Bridges

Mack Ave over Conrail

Fair

Wayne County, Michigan · Betwn Conner and ST Jean · Structure no. 000000000012474

Built
1989
36 years old
Condition
Fair
inspected June 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
499 ft
5 main spans
Daily traffic
9,682
2008 count
Owner
City
City or Municipal Highway Agency

About this bridge

Mack Ave over Conrail is a steel stringer/multi-beam or girder carrying Mack Ave over Conrail in Wayne County, Michigan. It was built in 1989, so it is 36 years old, younger 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 9,682 vehicles a day, roughly 3% of them trucks, projected to reach 27,385 by 2023. The structure is 499 ft (152.2 m) long and 84 ft wide.

Location

Open in Google Maps
CarriesMack Ave
CrossesConrail
LocationBetwn Conner and ST Jean
RouteCity Street 0
CountyWayne County
StateMichigan
Coordinates42.38231, -82.97321
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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJune 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry2: Basically intolerable, requiring high priority of replacement
Approach roadway alignment7: Better than present minimum criteria
Operating rating102.8 US tons
Inventory rating61.4 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans5
Design loadHS 20
Structure length499 ft (152.2 m)
Longest span120 ft (36.6 m)
Deck width84 ft (25.5 m)
Roadway width71 ft (21.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic9,682 (2008)
Projected traffic27,385 by 2023
Trucks3%
Lanes on structure6
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesRailroad
Detour if closed—
TollOn a free road
National Highway SystemYes

Ownership and planned work

OwnerCity or Municipal Highway Agency
Maintained byCity or Municipal 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 Mack Ave over Conrail built?

It was built in 1989, making it 36 years old in 2025.

What condition is Mack Ave over Conrail 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 June 2024.

How much traffic does Mack Ave over Conrail carry?

About 9,682 vehicles per day (2008 count), of which roughly 3% are trucks.

How long is Mack Ave over Conrail?

The structure is 499 ft (152.2 m) long with a longest span of 120 ft (36.6 m) and a deck 84 ft wide.

Who owns Mack Ave over Conrail?

It is owned by the City or Municipal Highway Agency.