US Bridges

I-69 SB over I-69 Bl

Fair

Eaton County, Michigan · NE Limit of Charlotte · Structure no. 000000000002267

Built
1989
36 years old
Condition
Fair
inspected June 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
268 ft
3 main spans
Daily traffic
14,585
2007 count
Owner
State
State Highway Agency

About this bridge

I-69 SB over I-69 Bl is a steel stringer/multi-beam or girder carrying I-69 SB over I-69 Bl in Eaton 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 14,585 vehicles a day, roughly 18% of them trucks, projected to reach 19,343 by 2018. The structure is 268 ft (81.8 m) long and 47 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

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CarriesI-69 SB
CrossesI-69 Bl
LocationNE Limit of Charlotte
RouteInterstate 69
CountyEaton County
StateMichigan
Coordinates42.57523, -84.81973
Functional classUrban Principal Arterial - Interstate

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 inspectionJune 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 rating62.2 US tons
Inventory rating37.1 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans3
Design loadHS 25 or greater
Structure length268 ft (81.8 m)
Longest span154 ft (46.9 m)
Deck width47 ft (14.4 m)
Roadway width44 ft (13.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic14,585 (2007)
Projected traffic19,343 by 2018
Trucks18%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed3.1 mi (5 km)
TollOn a free road
National Highway SystemYes
Strategic Highway NetworkInterstate STRAHNET route

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 SB over I-69 Bl built?

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

What condition is I-69 SB over I-69 Bl 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 I-69 SB over I-69 Bl carry?

About 14,585 vehicles per day (2007 count), of which roughly 18% are trucks.

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

The structure is 268 ft (81.8 m) long with a longest span of 154 ft (46.9 m) and a deck 47 ft wide.

Who owns I-69 SB over I-69 Bl?

It is owned by the State Highway Agency.