US Bridges

I-69 NB over M-100

Fair

Eaton County, Michigan · At S Limits Potterville · Structure no. 000000000002273

Built
1989
36 years old
Condition
Fair
inspected June 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
188 ft
3 main spans
Daily traffic
17,026
2007 count
Owner
State
State Highway Agency

About this bridge

I-69 NB over M-100 is a prestressed concrete stringer/multi-beam or girder carrying I-69 NB over M-100 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 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 17,026 vehicles a day, roughly 18% of them trucks, projected to reach 18,683 by 2018. The structure is 188 ft (57.2 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 NB
CrossesM-100
LocationAt S Limits Potterville
RouteInterstate 69
CountyEaton County
StateMichigan
Coordinates42.62043, -84.73893
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
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 alignment8: Equal to present desirable criteria
Operating rating75 US tons
Inventory rating37.1 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans3
Design loadHS 25 or greater
Structure length188 ft (57.2 m)
Longest span103 ft (31.5 m)
Deck width47 ft (14.4 m)
Roadway width44 ft (13.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic17,026 (2007)
Projected traffic18,683 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 NB over M-100 built?

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

What condition is I-69 NB over M-100 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 NB over M-100 carry?

About 17,026 vehicles per day (2007 count), of which roughly 18% are trucks.

How long is I-69 NB over M-100?

The structure is 188 ft (57.2 m) long with a longest span of 103 ft (31.5 m) and a deck 47 ft wide.

Who owns I-69 NB over M-100?

It is owned by the State Highway Agency.