US Bridges

21 MI RD over I-94

Fair

Macomb County, Michigan · 1.1 MI NE of M-59 · Structure no. 000000000006175

Built
1960
65 years old, rebuilt 2006
Condition
Fair
inspected June 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
244 ft
4 main spans
Daily traffic
16,870
1993 count
Owner
State
State Highway Agency

About this bridge

21 MI RD over I-94 is a steel stringer/multi-beam or girder carrying 21 MI RD over I-94 in Macomb County, Michigan. It was built in 1960 and reconstructed in 2006, so it is 65 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 16,870 vehicles a day, roughly 3% of them trucks, projected to reach 19,401 by 2013. The structure is 244 ft (74.5 m) long and 77 ft wide.

Carries21 MI RD
CrossesI-94
Location1.1 MI NE of M-59
RouteCounty Highway 2058
Coordinates42.64539, -82.84031
Functional classUrban Minor 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 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry9: Superior to present desirable criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating74 US tons
Inventory rating44.3 US tons

Structure

MaterialSteel
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20 + Mod
Structure length244 ft (74.5 m)
Longest span89 ft (27.1 m)
Deck width77 ft (23.4 m)
Roadway width72 ft (21.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic16,870 (1993)
Projected traffic19,401 by 2013
Trucks3%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway
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 proposedNone recorded
Estimated improvement cost—
NavigationNot applicable (no waterway)

Frequently asked questions

When was 21 MI RD over I-94 built?

It was built in 1960, making it 65 years old in 2025. It was reconstructed in 2006.

What condition is 21 MI RD over I-94 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 2023.

How much traffic does 21 MI RD over I-94 carry?

About 16,870 vehicles per day (1993 count), of which roughly 3% are trucks.

How long is 21 MI RD over I-94?

The structure is 244 ft (74.5 m) long with a longest span of 89 ft (27.1 m) and a deck 77 ft wide.

Who owns 21 MI RD over I-94?

It is owned by the State Highway Agency.