US Bridges

SR 18 over I-65 Sb/Nb

Fair

White County, Indiana · 02.71 E US 231 · Structure no. 004615

Built
1967
58 years old, rebuilt 2003
Condition
Fair
inspected January 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
247 ft
2 main spans
Daily traffic
1,738
2021 count
Owner
State
State Highway Agency

About this bridge

SR 18 over I-65 Sb/Nb is a steel continuous stringer/multi-beam or girder carrying SR 18 over I-65 Sb/Nb in White County, Indiana. It was built in 1967 and reconstructed in 2003, so it is 58 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 1,738 vehicles a day, roughly 20% of them trucks, projected to reach 2,125 by 2032. The structure is 247 ft (75.2 m) long and 47 ft wide. If it were closed, the detour would be 5.6 mi (9 km).

Location

Open in Google Maps
CarriesSR 18
CrossesI-65 Sb/Nb
Location02.71 E US 231
RouteState Highway 18
CountyWhite County
StateIndiana
Coordinates40.60546, -86.97953
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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJanuary 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating35.4 US tons
Inventory rating26.8 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20 + Mod
Structure length247 ft (75.2 m)
Longest span121 ft (36.9 m)
Deck width47 ft (14.3 m)
Roadway width44 ft (13.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,738 (2021)
Projected traffic2,125 by 2032
Trucks20%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed5.6 mi (9 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 18 over I-65 Sb/Nb built?

It was built in 1967, making it 58 years old in 2025. It was reconstructed in 2003.

What condition is SR 18 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 January 2024.

How much traffic does SR 18 over I-65 Sb/Nb carry?

About 1,738 vehicles per day (2021 count), of which roughly 20% are trucks.

How long is SR 18 over I-65 Sb/Nb?

The structure is 247 ft (75.2 m) long with a longest span of 121 ft (36.9 m) and a deck 47 ft wide.

Who owns SR 18 over I-65 Sb/Nb?

It is owned by the State Highway Agency.