US Bridges

CO Line RD over I-94

Fair

Macomb County, Michigan · ST Clair CO Line · Structure no. 000000000006185

Built
1963
62 years old
Condition
Fair
inspected June 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
268 ft
4 main spans
Daily traffic
6,252
1996 count
Owner
State
State Highway Agency

About this bridge

CO Line RD over I-94 is a steel stringer/multi-beam or girder carrying CO Line RD 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 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 6,252 vehicles a day, roughly 3% of them trucks, projected to reach 2,630 by 2015. The structure is 268 ft (81.7 m) long and 33 ft wide. If it were closed, the detour would be 8.1 mi (13 km).

Location

Open in Google Maps
CarriesCO Line RD
CrossesI-94
LocationST Clair CO Line
RouteCounty Highway 7741
CountyMacomb County
StateMichigan
Coordinates42.73363, -82.73058
Functional classRural Major Collector

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.
Substructure7 GoodSome minor problems.
Last inspectionJune 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Approach roadway alignment7: Better than present minimum criteria
Operating rating74 US tons
Inventory rating44.3 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans4
Design loadH 20
Structure length268 ft (81.7 m)
Longest span88 ft (26.9 m)
Deck width33 ft (10.2 m)
Roadway width26 ft (7.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic6,252 (1996)
Projected traffic2,630 by 2015
Trucks3%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed8.1 mi (13 km)
TollOn a free road
National Highway SystemNo

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 CO Line RD over I-94 built?

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

What condition is CO Line 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 CO Line RD over I-94 carry?

About 6,252 vehicles per day (1996 count), of which roughly 3% are trucks.

How long is CO Line RD over I-94?

The structure is 268 ft (81.7 m) long with a longest span of 88 ft (26.9 m) and a deck 33 ft wide.

Who owns CO Line RD over I-94?

It is owned by the State Highway Agency.