US Bridges

SR 46 over Cobbs Fork Sand Creek

Fair

Decatur County, Indiana · 04.73 E US 421 · Structure no. 017420

Built
1941
84 years old
Condition
Fair
inspected July 2024
Type
Culvert
Concrete
Length
32 ft
1 main span
Daily traffic
4,187
2021 count
Owner
State
State Highway Agency

About this bridge

SR 46 over Cobbs Fork Sand Creek is a concrete culvert carrying SR 46 over Cobbs Fork Sand Creek in Decatur County, Indiana. It was built in 1941, so it is 84 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 4,187 vehicles a day, roughly 10% of them trucks, projected to reach 6,446 by 2031. The structure is 32 ft (9.7 m) long and 40 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
CarriesSR 46
CrossesCobbs Fork Sand Creek
Location04.73 E US 421
RouteState Highway 46
CountyDecatur County
StateIndiana
Coordinates39.32061, -85.39634
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
Channel and channel protection7 GoodSome minor problems.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJuly 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating60.4 US tons
Inventory rating36.3 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans1
Design loadHS 20
Structure length32 ft (9.7 m)
Longest span30 ft (9.1 m)
Deck width40 ft (12.1 m)
Roadway width37 ft (11.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic4,187 (2021)
Projected traffic6,446 by 2031
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.7 mi (6 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 46 over Cobbs Fork Sand Creek built?

It was built in 1941, making it 84 years old in 2025.

What condition is SR 46 over Cobbs Fork Sand 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 July 2024.

How much traffic does SR 46 over Cobbs Fork Sand Creek carry?

About 4,187 vehicles per day (2021 count), of which roughly 10% are trucks.

How long is SR 46 over Cobbs Fork Sand Creek?

The structure is 32 ft (9.7 m) long with a longest span of 30 ft (9.1 m) and a deck 40 ft wide.

Who owns SR 46 over Cobbs Fork Sand Creek?

It is owned by the State Highway Agency.