US Bridges

I-69 SB over Big Creek

Fair

Eaton County, Michigan · 2.5 MI NE of Olivet · Structure no. 000000000002241

Built
1972
53 years old
Condition
Fair
inspected May 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
97 ft
3 main spans
Daily traffic
12,272
2007 count
Owner
State
State Highway Agency

About this bridge

I-69 SB over Big Creek is a prestressed concrete stringer/multi-beam or girder carrying I-69 SB over Big Creek in Eaton County, Michigan. It was built in 1972, so it is 53 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 12,272 vehicles a day, roughly 22% of them trucks, projected to reach 18,109 by 2018. The structure is 97 ft (29.7 m) long and 45 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesI-69 SB
CrossesBig Creek
Location2.5 MI NE of Olivet
RouteInterstate 69
CountyEaton County
StateMichigan
Coordinates42.4729, -84.89173
Functional classRural 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
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMay 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating70 US tons
Inventory rating41.8 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20 + Mod
Structure length97 ft (29.7 m)
Longest span31 ft (9.4 m)
Deck width45 ft (13.7 m)
Roadway width40 ft (12.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic12,272 (2007)
Projected traffic18,109 by 2018
Trucks22%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 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—
NavigationNo navigation control on waterway

Frequently asked questions

When was I-69 SB over Big Creek built?

It was built in 1972, making it 53 years old in 2025.

What condition is I-69 SB over Big Creek 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 SB over Big Creek carry?

About 12,272 vehicles per day (2007 count), of which roughly 22% are trucks.

How long is I-69 SB over Big Creek?

The structure is 97 ft (29.7 m) long with a longest span of 31 ft (9.4 m) and a deck 45 ft wide.

Who owns I-69 SB over Big Creek?

It is owned by the State Highway Agency.