US Bridges

M-3 & M-29 over I-94

Poor

Macomb County, Michigan · @ M-3 & M-29 · Structure no. 000000000006182

Built
1963
62 years old
Condition
Poor
inspected June 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
348 ft
4 main spans
Daily traffic
37,832
2007 count
Owner
State
State Highway Agency

About this bridge

M-3 & M-29 over I-94 is a steel stringer/multi-beam or girder carrying M-3 & M-29 over I-94 in Macomb County, Michigan. It was built in 1963, so it is 62 years old, older than the Michigan average of 48.3 years.

The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

It carries about 37,832 vehicles a day, roughly 1% of them trucks, projected to reach 52,819 by 2018. The structure is 348 ft (106 m) long and 75 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

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CarriesM-3 & M-29
CrossesI-94
Location@ M-3 & M-29
RouteState Highway 3
CountyMacomb County
StateMichigan
Coordinates42.67436, -82.82037
Functional classUrban Other Principal Arterial

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Substructure7 GoodSome minor problems.
Last inspectionJune 2024
Inspection intervalevery 12 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry7: Better than present minimum criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating79.3 US tons
Inventory rating46.4 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20
Structure length348 ft (106 m)
Longest span121 ft (36.8 m)
Deck width75 ft (23 m)
Roadway width64 ft (19.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic37,832 (2007)
Projected traffic52,819 by 2018
Trucks1%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed3.7 mi (6 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—
NavigationNot applicable (no waterway)

Frequently asked questions

When was M-3 & M-29 over I-94 built?

It was built in 1963, making it 62 years old in 2025.

What condition is M-3 & M-29 over I-94 in?

The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in June 2024.

How much traffic does M-3 & M-29 over I-94 carry?

About 37,832 vehicles per day (2007 count), of which roughly 1% are trucks.

How long is M-3 & M-29 over I-94?

The structure is 348 ft (106 m) long with a longest span of 121 ft (36.8 m) and a deck 75 ft wide.

Who owns M-3 & M-29 over I-94?

It is owned by the State Highway Agency.