US Bridges

US 31 SB over Amity Ditch

Good

Johnson County, Indiana · 01.14 N SR 252 · Structure no. 009360

Built
1950
75 years old, rebuilt 2020
Condition
Good
inspected October 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
39 ft
1 main span
Daily traffic
5,598
2022 count
Owner
State
State Highway Agency

About this bridge

US 31 SB over Amity Ditch is a prestressed concrete stringer/multi-beam or girder carrying US 31 SB over Amity Ditch in Johnson County, Indiana. It was built in 1950 and reconstructed in 2020, so it is 75 years old, older 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 5,598 vehicles a day, roughly 7% of them trucks, projected to reach 8,867 by 2040. The structure is 39 ft (11.8 m) long and 42 ft wide. If it were closed, the detour would be 0.6 mi (1 km).

CarriesUS 31 SB
CrossesAmity Ditch
Location01.14 N SR 252
RouteU.S. Route 31
StateIndiana
Coordinates39.42696, -86.00414
Functional classUrban Other Principal Arterial

Condition and inspection

Good

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

ComponentRatingMeaning
Deck8 Very GoodNo problems noted.
Superstructure8 Very GoodNo problems noted.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionOctober 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating52.9 US tons
Inventory rating40.3 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHL 93
Structure length39 ft (11.8 m)
Longest span37 ft (11.3 m)
Deck width42 ft (12.8 m)
Roadway width39 ft (11.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic5,598 (2022)
Projected traffic8,867 by 2040
Trucks7%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesWaterway
Detour if closed0.6 mi (1 km)
TollOn a free road
National Highway SystemNo

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 US 31 SB over Amity Ditch built?

It was built in 1950, making it 75 years old in 2025. It was reconstructed in 2020.

What condition is US 31 SB over Amity Ditch 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 October 2024.

How much traffic does US 31 SB over Amity Ditch carry?

About 5,598 vehicles per day (2022 count), of which roughly 7% are trucks.

How long is US 31 SB over Amity Ditch?

The structure is 39 ft (11.8 m) long with a longest span of 37 ft (11.3 m) and a deck 42 ft wide.

Who owns US 31 SB over Amity Ditch?

It is owned by the State Highway Agency.