US Bridges

I-75 SB over Indian River

Fair

Cheboygan County, Michigan · 1.4 MI N of M-68 · Structure no. 000000000001503

Built
1962
63 years old
Condition
Fair
inspected May 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
179 ft
3 main spans
Daily traffic
4,474
2007 count
Owner
State
State Highway Agency

About this bridge

I-75 SB over Indian River is a steel stringer/multi-beam or girder carrying I-75 SB over Indian River in Cheboygan County, Michigan. It was built in 1962, so it is 63 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 4,474 vehicles a day, roughly 11% of them trucks, projected to reach 5,599 by 2018. The structure is 179 ft (54.5 m) long and 47 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesI-75 SB
CrossesIndian River
Location1.4 MI N of M-68
RouteInterstate 75
CountyCheboygan County
StateMichigan
Coordinates45.42204, -84.60286
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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionMay 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry8: Equal to present desirable criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating73.5 US tons
Inventory rating44.3 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length179 ft (54.5 m)
Longest span70 ft (21.3 m)
Deck width47 ft (14.4 m)
Roadway width42 ft (12.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic4,474 (2007)
Projected traffic5,599 by 2018
Trucks11%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesWaterway
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—
NavigationNavigation control on waterway (bridge permit required)

Frequently asked questions

When was I-75 SB over Indian River built?

It was built in 1962, making it 63 years old in 2025.

What condition is I-75 SB over Indian River 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 2024.

How much traffic does I-75 SB over Indian River carry?

About 4,474 vehicles per day (2007 count), of which roughly 11% are trucks.

How long is I-75 SB over Indian River?

The structure is 179 ft (54.5 m) long with a longest span of 70 ft (21.3 m) and a deck 47 ft wide.

Who owns I-75 SB over Indian River?

It is owned by the State Highway Agency.