US Bridges

SR 56 over Robb Creek

Fair

Gibson County, Indiana · 01.43 E US 41 · Structure no. 019890

Built
1964
61 years old, rebuilt 1977
Condition
Fair
inspected September 2024
Type
Slab
Concrete Continuous
Length
101 ft
3 main spans
Daily traffic
2,249
2004 count
Owner
State
State Highway Agency

About this bridge

SR 56 over Robb Creek is a concrete continuous slab carrying SR 56 over Robb Creek in Gibson County, Indiana. It was built in 1964 and reconstructed in 1977, so it is 61 years old, older 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 2,249 vehicles a day, roughly 10% of them trucks, projected to reach 3,734 by 2034. The structure is 101 ft (30.7 m) long and 32 ft wide. If it were closed, the detour would be 0.6 mi (1 km).

Location

Open in Google Maps
CarriesSR 56
CrossesRobb Creek
Location01.43 E US 41
RouteState Highway 56
CountyGibson County
StateIndiana
Coordinates38.48693, -87.54753
Functional classRural Major Collector

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.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionSeptember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation6: Equal to present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating47.6 US tons
Inventory rating28.5 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length101 ft (30.7 m)
Longest span42 ft (12.8 m)
Deck width32 ft (9.9 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,249 (2004)
Projected traffic3,734 by 2034
Trucks10%
Lanes on structure2
Traffic directionTwo-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 SR 56 over Robb Creek built?

It was built in 1964, making it 61 years old in 2025. It was reconstructed in 1977.

What condition is SR 56 over Robb Creek 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 September 2024.

How much traffic does SR 56 over Robb Creek carry?

About 2,249 vehicles per day (2004 count), of which roughly 10% are trucks.

How long is SR 56 over Robb Creek?

The structure is 101 ft (30.7 m) long with a longest span of 42 ft (12.8 m) and a deck 32 ft wide.

Who owns SR 56 over Robb Creek?

It is owned by the State Highway Agency.