US Bridges

Island Highway over I-69

Fair

Eaton County, Michigan · 1.8 MI N of M-50 · Structure no. 000000000002258

Built
1971
54 years old
Condition
Fair
inspected May 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
231 ft
2 main spans
Daily traffic
2,050
1988 count
Owner
State
State Highway Agency

About this bridge

Island Highway over I-69 is a steel stringer/multi-beam or girder carrying Island Highway over I-69 in Eaton County, Michigan. It was built in 1971, 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 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 2,050 vehicles a day, roughly 3% of them trucks, projected to reach 1,990 by 2007. The structure is 231 ft (70.4 m) long and 44 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

Open in Google Maps
CarriesIsland Highway
CrossesI-69
Location1.8 MI N of M-50
RouteCounty Highway 0
CountyEaton County
StateMichigan
Coordinates42.568, -84.82075
Functional classUrban Minor 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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMay 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating68.2 US tons
Inventory rating40.7 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans2
Design loadH 20
Structure length231 ft (70.4 m)
Longest span115 ft (35 m)
Deck width44 ft (13.5 m)
Roadway width40 ft (12.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,050 (1988)
Projected traffic1,990 by 2007
Trucks3%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed5 mi (8 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 Island Highway over I-69 built?

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

What condition is Island Highway 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 Island Highway over I-69 carry?

About 2,050 vehicles per day (1988 count), of which roughly 3% are trucks.

How long is Island Highway over I-69?

The structure is 231 ft (70.4 m) long with a longest span of 115 ft (35 m) and a deck 44 ft wide.

Who owns Island Highway over I-69?

It is owned by the State Highway Agency.