US Bridges

SR 47 over I-65 Sb/Nb

Fair

Boone County, Indiana · 01.84 S SR 39 · Structure no. 017700

Built
1970
55 years old, rebuilt 2018
Condition
Fair
inspected February 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
218 ft
2 main spans
Daily traffic
5,728
2014 count
Owner
State
State Highway Agency

About this bridge

SR 47 over I-65 Sb/Nb is a steel continuous stringer/multi-beam or girder carrying SR 47 over I-65 Sb/Nb in Boone County, Indiana. It was built in 1970 and reconstructed in 2018, so it is 55 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 5,728 vehicles a day, roughly 10% of them trucks, projected to reach 3,900 by 2032. The structure is 218 ft (66.4 m) long and 49 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
CarriesSR 47
CrossesI-65 Sb/Nb
Location01.84 S SR 39
RouteState Highway 47
CountyBoone County
StateIndiana
Coordinates40.12651, -86.51773
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
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionFebruary 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating34 US tons
Inventory rating26.1 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20
Structure length218 ft (66.4 m)
Longest span107 ft (32.6 m)
Deck width49 ft (14.8 m)
Roadway width47 ft (14.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic5,728 (2014)
Projected traffic3,900 by 2032
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
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—
NavigationNot applicable (no waterway)

Frequently asked questions

When was SR 47 over I-65 Sb/Nb built?

It was built in 1970, making it 55 years old in 2025. It was reconstructed in 2018.

What condition is SR 47 over I-65 Sb/Nb 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 February 2023.

How much traffic does SR 47 over I-65 Sb/Nb carry?

About 5,728 vehicles per day (2014 count), of which roughly 10% are trucks.

How long is SR 47 over I-65 Sb/Nb?

The structure is 218 ft (66.4 m) long with a longest span of 107 ft (32.6 m) and a deck 49 ft wide.

Who owns SR 47 over I-65 Sb/Nb?

It is owned by the State Highway Agency.