US 6 over Big Run

Good

DeKalb County, Indiana · 00.96 E SR 1 · Structure no. 001880

Built: 1950; 75 years old, rebuilt 2016
Condition: Good; inspected July 2024
Type: Slab; Concrete Continuous
Length: 76 ft; 3 main spans
Daily traffic: 3,305; 2021 count
Owner: State; State Highway Agency

About this bridge

US 6 over Big Run is a concrete continuous slab carrying US 6 over Big Run in DeKalb County, Indiana. It was built in 1950 and reconstructed in 2016, 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 3,305 vehicles a day, roughly 32% of them trucks, projected to reach 6,504 by 2030. The structure is 76 ft (23.3 m) long and 43 ft wide. If it were closed, the detour would be 2.5 mi (4 km).

Location

Open in Google Maps

CarriesUS 6

CrossesBig Run

Location00.96 E SR 1

RouteU.S. Route 6

CountyDeKalb County

StateIndiana

Coordinates41.43059, -84.85306

Functional classRural Principal Arterial - Other

Condition and inspection

Good

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

Component	Rating	Meaning
Deck	7 Good	Some minor problems.
Superstructure	7 Good	Some minor problems.
Substructure	7 Good	Some minor problems.
Channel and channel protection	8 Very Good	No problems noted.

Last inspectionJuly 2024

Inspection intervalevery 24 months

Operating statusOpen, no restriction

ScourFoundations stable; scour above top of footing

Structural evaluation7: Better than present minimum criteria

Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is

Waterway adequacy8: Equal to present desirable criteria

Approach roadway alignment8: Equal to present desirable criteria

Operating rating53.2 US tons

Inventory rating40.7 US tons

Structure

Structure typeSlab

MaterialConcrete Continuous

DeckConcrete, cast-in-place

Main spans3

Design loadHS 20

Structure length76 ft (23.3 m)

Longest span30 ft (9.1 m)

Deck width43 ft (13.1 m)

Roadway width40 ft (12.1 m)

Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,305 (2021)

Projected traffic6,504 by 2030

Trucks32%

Lanes on structure2

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 6 over Big Run built?

It was built in 1950, making it 75 years old in 2025. It was reconstructed in 2016.

What condition is US 6 over Big Run 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 6 over Big Run carry?

About 3,305 vehicles per day (2021 count), of which roughly 32% are trucks.

How long is US 6 over Big Run?

The structure is 76 ft (23.3 m) long with a longest span of 30 ft (9.1 m) and a deck 43 ft wide.

Who owns US 6 over Big Run?

It is owned by the State Highway Agency.