US Bridges

US 20 over US 31 Sb/Nb

Good

St. Joseph County, Indiana · 02.75 E SR 23 · Structure no. 010171

Built
2022
3 years old
Condition
Good
inspected July 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
118 ft
2 main spans
Daily traffic
2,022
2024 count
Owner
State
State Highway Agency

About this bridge

US 20 over US 31 Sb/Nb is a steel continuous stringer/multi-beam or girder carrying US 20 over US 31 Sb/Nb in St. Joseph County, Indiana. It was built in 2022, so it is 3 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 9 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 2,022 vehicles a day, roughly 52% of them trucks, projected to reach 44,449 by 2042. The structure is 118 ft (36.1 m) long and 111 ft wide. If it were closed, the detour would be 11.8 mi (19 km).

Location

Open in Google Maps
CarriesUS 20
CrossesUS 31 Sb/Nb
Location02.75 E SR 23
RouteU.S. Route 20
CountySt. Joseph County
StateIndiana
Coordinates41.62445, -86.25152
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
Deck9 ExcellentNo problems noted.
Superstructure9 ExcellentNo problems noted.
Substructure9 ExcellentNo problems noted.
Last inspectionJuly 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation9: Superior to present desirable criteria
Deck geometry9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating79.3 US tons
Inventory rating61.1 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHL 93
Structure length118 ft (36.1 m)
Longest span58 ft (17.7 m)
Deck width111 ft (33.8 m)
Roadway width105 ft (32 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,022 (2024)
Projected traffic44,449 by 2042
Trucks52%
Lanes on structure6
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed11.8 mi (19 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 20 over US 31 Sb/Nb built?

It was built in 2022, making it 3 years old in 2025.

What condition is US 20 over US 31 Sb/Nb 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 2024.

How much traffic does US 20 over US 31 Sb/Nb carry?

About 2,022 vehicles per day (2024 count), of which roughly 52% are trucks.

How long is US 20 over US 31 Sb/Nb?

The structure is 118 ft (36.1 m) long with a longest span of 58 ft (17.7 m) and a deck 111 ft wide.

Who owns US 20 over US 31 Sb/Nb?

It is owned by the State Highway Agency.