US Bridges

I-69 Bl over I-69

Fair

Eaton County, Michigan · 3.0 MI S of Charlotte · Structure no. 000000000002255

Built
1971
54 years old, rebuilt 2023
Condition
Fair
inspected May 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
501 ft
5 main spans
Daily traffic
4,432
2020 count
Owner
State
State Highway Agency

About this bridge

I-69 Bl over I-69 is a steel stringer/multi-beam or girder carrying I-69 Bl over I-69 in Eaton County, Michigan. It was built in 1971 and reconstructed in 2023, so it is 54 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 4,432 vehicles a day, roughly 11% of them trucks, projected to reach 4,897 by 2040. The structure is 501 ft (152.6 m) long and 50 ft wide.

Location

Open in Google Maps
CarriesI-69 Bl
CrossesI-69
Location3.0 MI S of Charlotte
RouteCounty Highway 0
CountyEaton County
StateMichigan
Coordinates42.51559, -84.83587
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMay 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating79.3 US tons
Inventory rating47.5 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans5
Design loadHS 20 + Mod
Structure length501 ft (152.6 m)
Longest span134 ft (40.8 m)
Deck width50 ft (15.2 m)
Roadway width47 ft (14.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic4,432 (2020)
Projected traffic4,897 by 2040
Trucks11%
Lanes on structure2
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 I-69 Bl over I-69 built?

It was built in 1971, making it 54 years old in 2025. It was reconstructed in 2023.

What condition is I-69 Bl over I-69 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 May 2023.

How much traffic does I-69 Bl over I-69 carry?

About 4,432 vehicles per day (2020 count), of which roughly 11% are trucks.

How long is I-69 Bl over I-69?

The structure is 501 ft (152.6 m) long with a longest span of 134 ft (40.8 m) and a deck 50 ft wide.

Who owns I-69 Bl over I-69?

It is owned by the State Highway Agency.