US Bridges

I-90 Rampus 31 over US 31 Nb/Sb

Fair

St. Joseph County, Indiana · 00.31 S I-90 · Structure no. 010217

Built
1979
46 years old
Condition
Fair
inspected July 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete Continuous
Length
281 ft
4 main spans
Daily traffic
6,660
2014 count
Owner
Toll Authority
State Toll Authority

About this bridge

I-90 Rampus 31 over US 31 Nb/Sb is a prestressed concrete continuous stringer/multi-beam or girder carrying I-90 Rampus 31 over US 31 Nb/Sb in St. Joseph County, Indiana. It was built in 1979, so it is 46 years old, younger than the Indiana average of 46.6 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 6,660 vehicles a day, roughly 14% of them trucks, projected to reach 8,669 by 2031. The structure is 281 ft (85.6 m) long and 57 ft wide. If it were closed, the detour would be 0.6 mi (1 km).

Location

Open in Google Maps
CarriesI-90 Rampus 31
CrossesUS 31 Nb/Sb
Location00.31 S I-90
RouteInterstate 90
CountySt. Joseph County
StateIndiana
Coordinates41.72609, -86.33931
Functional classUrban 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.
Substructure7 GoodSome minor problems.
Last inspectionJuly 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 rating39.7 US tons
Inventory rating30.8 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20
Structure length281 ft (85.6 m)
Longest span92 ft (28.1 m)
Deck width57 ft (17.4 m)
Roadway width54 ft (16.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic6,660 (2014)
Projected traffic8,669 by 2031
Trucks14%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed0.6 mi (1 km)
TollOn a toll road
National Highway SystemYes
Strategic Highway NetworkInterstate STRAHNET route

Ownership and planned work

OwnerState Toll Authority
Maintained byState Toll Authority
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-90 Rampus 31 over US 31 Nb/Sb built?

It was built in 1979, making it 46 years old in 2025.

What condition is I-90 Rampus 31 over US 31 Nb/Sb 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 July 2023.

How much traffic does I-90 Rampus 31 over US 31 Nb/Sb carry?

About 6,660 vehicles per day (2014 count), of which roughly 14% are trucks.

How long is I-90 Rampus 31 over US 31 Nb/Sb?

The structure is 281 ft (85.6 m) long with a longest span of 92 ft (28.1 m) and a deck 57 ft wide.

Who owns I-90 Rampus 31 over US 31 Nb/Sb?

It is owned by the State Toll Authority.