US Bridges

I-75 SB over Otter Creek

Fair

Monroe County, Michigan · 8.7 MI NE Ohio State Line · Structure no. 000000000007163

Built
2024
1 years old
Condition
Fair
inspected December 2024
Type
Box Beam or Girders - Single or Spread
Prestressed Concrete
Length
240 ft
3 main spans
Daily traffic
29,300
2017 count
Owner
State
State Highway Agency

About this bridge

I-75 SB over Otter Creek is a prestressed concrete box beam or girders - single or spread carrying I-75 SB over Otter Creek in Monroe County, Michigan. It was built in 2024, so it is 1 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 29,300 vehicles a day, roughly 27% of them trucks, projected to reach 32,350 by 2037. The structure is 240 ft (73.2 m) long and 75 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesI-75 SB
CrossesOtter Creek
Location8.7 MI NE Ohio State Line
RouteInterstate 75
CountyMonroe County
StateMichigan
Coordinates41.84419, -83.41976
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
Deck8 Very GoodNo problems noted.
Superstructure9 ExcellentNo problems noted.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionDecember 2024
Inspection intervalevery 6 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 adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating59.6 US tons
Inventory rating44.3 US tons

Structure

Structure typeBox Beam or Girders - Single or Spread
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans3
Design loadGreater than HL 93
Structure length240 ft (73.2 m)
Longest span78 ft (23.9 m)
Deck width75 ft (23 m)
Roadway width73 ft (22.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic29,300 (2017)
Projected traffic32,350 by 2037
Trucks27%
Lanes on structure4
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-75 SB over Otter Creek built?

It was built in 2024, making it 1 years old in 2025.

What condition is I-75 SB over Otter 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 December 2024.

How much traffic does I-75 SB over Otter Creek carry?

About 29,300 vehicles per day (2017 count), of which roughly 27% are trucks.

How long is I-75 SB over Otter Creek?

The structure is 240 ft (73.2 m) long with a longest span of 78 ft (23.9 m) and a deck 75 ft wide.

Who owns I-75 SB over Otter Creek?

It is owned by the State Highway Agency.