US Bridges

US 31 NB over SR 4

Good

St. Joseph County, Indiana · 06.63 N US 6 · Structure no. 079682

Built
2014
11 years old
Condition
Good
inspected July 2023
Type
Tee Beam
Prestressed Concrete
Length
118 ft
1 main span
Daily traffic
8,307
2020 count
Owner
State
State Highway Agency

About this bridge

US 31 NB over SR 4 is a prestressed concrete tee beam carrying US 31 NB over SR 4 in St. Joseph County, Indiana. It was built in 2014, so it is 11 years old, younger than the Indiana average of 46.6 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 8,307 vehicles a day, roughly 20% of them trucks, projected to reach 17,525 by 2035. The structure is 118 ft (36 m) long and 47 ft wide. If it were closed, the detour would be 0.6 mi (1 km).

Location

Open in Google Maps
CarriesUS 31 NB
CrossesSR 4
Location06.63 N US 6
RouteU.S. Route 31
CountySt. Joseph County
StateIndiana
Coordinates41.53537, -86.24964
Functional classUrban Principal Arterial - Other Freeway or Expressway

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure8 Very GoodNo problems noted.
Last inspectionJuly 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating67.5 US tons
Inventory rating42.5 US tons

Structure

Structure typeTee Beam
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHL 93
Structure length118 ft (36 m)
Longest span116 ft (35.4 m)
Deck width47 ft (14.3 m)
Roadway width44 ft (13.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic8,307 (2020)
Projected traffic17,525 by 2035
Trucks20%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed0.6 mi (1 km)
TollOn a free road
National Highway SystemYes

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 US 31 NB over SR 4 built?

It was built in 2014, making it 11 years old in 2025.

What condition is US 31 NB over SR 4 in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in July 2023.

How much traffic does US 31 NB over SR 4 carry?

About 8,307 vehicles per day (2020 count), of which roughly 20% are trucks.

How long is US 31 NB over SR 4?

The structure is 118 ft (36 m) long with a longest span of 116 ft (35.4 m) and a deck 47 ft wide.

Who owns US 31 NB over SR 4?

It is owned by the State Highway Agency.