US Bridges

US 20 over Miami Highway

Fair

St. Joseph County, Indiana · 00.87 E US 31 · Structure no. 075000

Built
1991
34 years old
Condition
Fair
inspected July 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete Continuous
Length
150 ft
3 main spans
Daily traffic
39,107
2021 count
Owner
State
State Highway Agency

About this bridge

US 20 over Miami Highway is a prestressed concrete continuous stringer/multi-beam or girder carrying US 20 over Miami Highway in St. Joseph County, Indiana. It was built in 1991, so it is 34 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 39,107 vehicles a day, roughly 16% of them trucks, projected to reach 31,980 by 2030. The structure is 150 ft (45.7 m) long and 97 ft wide. If it were closed, the detour would be 7.5 mi (12 km).

Location

Open in Google Maps
CarriesUS 20
CrossesMiami Highway
Location00.87 E US 31
RouteU.S. Route 20
CountySt. Joseph County
StateIndiana
Coordinates41.62453, -86.23474
Functional classUrban Principal Arterial - Other Freeway or Expressway

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 2024
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 rating61.4 US tons
Inventory rating47.5 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length150 ft (45.7 m)
Longest span73 ft (22.2 m)
Deck width97 ft (29.5 m)
Roadway width91 ft (27.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic39,107 (2021)
Projected traffic31,980 by 2030
Trucks16%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed7.5 mi (12 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 Miami Highway built?

It was built in 1991, making it 34 years old in 2025.

What condition is US 20 over Miami Highway 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 2024.

How much traffic does US 20 over Miami Highway carry?

About 39,107 vehicles per day (2021 count), of which roughly 16% are trucks.

How long is US 20 over Miami Highway?

The structure is 150 ft (45.7 m) long with a longest span of 73 ft (22.2 m) and a deck 97 ft wide.

Who owns US 20 over Miami Highway?

It is owned by the State Highway Agency.