US Bridges

US 41 over Thompsons Ditch

Good

Vigo County, Indiana · 00.98 S I-70 · Structure no. 014970

Built
1950
75 years old, rebuilt 1976
Condition
Good
inspected September 2023
Type
Arch - Deck
Concrete
Length
33 ft
1 main span
Daily traffic
29,367
2021 count
Owner
State
State Highway Agency

About this bridge

US 41 over Thompsons Ditch is a concrete arch - deck carrying US 41 over Thompsons Ditch in Vigo County, Indiana. It was built in 1950 and reconstructed in 1976, 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 29,367 vehicles a day, roughly 13% of them trucks, projected to reach 52,329 by 2032. The structure is 33 ft (10 m) long and 100 ft wide. If it were closed, the detour would be 2.5 mi (4 km).

CarriesUS 41
CrossesThompsons Ditch
Location00.98 S I-70
RouteU.S. Route 41
StateIndiana
Coordinates39.41616, -87.41601
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
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionSeptember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry9: Superior to present desirable criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating100 US tons
Inventory rating68.3 US tons

Structure

Structure typeArch - Deck
MaterialConcrete
DeckNot applicable
Main spans1
Design loadHS 20
Structure length33 ft (10 m)
Longest span30 ft (9.1 m)
Deck width100 ft (30.4 m)
Roadway width100 ft (30.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic29,367 (2021)
Projected traffic52,329 by 2032
Trucks13%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed2.5 mi (4 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—
NavigationNo navigation control on waterway

Frequently asked questions

When was US 41 over Thompsons Ditch built?

It was built in 1950, making it 75 years old in 2025. It was reconstructed in 1976.

What condition is US 41 over Thompsons 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 September 2023.

How much traffic does US 41 over Thompsons Ditch carry?

About 29,367 vehicles per day (2021 count), of which roughly 13% are trucks.

How long is US 41 over Thompsons Ditch?

The structure is 33 ft (10 m) long with a longest span of 30 ft (9.1 m) and a deck 100 ft wide.

Who owns US 41 over Thompsons Ditch?

It is owned by the State Highway Agency.