US Bridges

Darwin Road over I-70

Good

Vigo County, Indiana · 03.44 W US 41 · Structure no. 041040

Built
1964
61 years old, rebuilt 1988
Condition
Good
inspected January 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
237 ft
4 main spans
Daily traffic
1,519
2021 count
Owner
State
State Highway Agency

About this bridge

Darwin Road over I-70 is a steel continuous stringer/multi-beam or girder carrying Darwin Road over I-70 in Vigo County, Indiana. It was built in 1964 and reconstructed in 1988, 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 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 1,519 vehicles a day, roughly 10% of them trucks, projected to reach 9,008 by 2030. The structure is 237 ft (72.2 m) long and 35 ft wide. If it were closed, the detour would be 7.5 mi (12 km).

Location

Open in Google Maps
CarriesDarwin Road
CrossesI-70
Location03.44 W US 41
RouteCounty Highway 0
CountyVigo County
StateIndiana
Coordinates39.4486, -87.46952
Functional classRural Minor Collector

Condition and inspection

Good

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

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Last inspectionJanuary 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating47.8 US tons
Inventory rating36.8 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadHL 93
Structure length237 ft (72.2 m)
Longest span72 ft (21.8 m)
Deck width35 ft (10.7 m)
Roadway width32 ft (9.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,519 (2021)
Projected traffic9,008 by 2030
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed7.5 mi (12 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 proposedDeck replacement with only incidental widening
Estimated improvement cost$1 million
NavigationNot applicable (no waterway)

Frequently asked questions

When was Darwin Road over I-70 built?

It was built in 1964, making it 61 years old in 2025. It was reconstructed in 1988.

What condition is Darwin Road over I-70 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 January 2023.

How much traffic does Darwin Road over I-70 carry?

About 1,519 vehicles per day (2021 count), of which roughly 10% are trucks.

How long is Darwin Road over I-70?

The structure is 237 ft (72.2 m) long with a longest span of 72 ft (21.8 m) and a deck 35 ft wide.

Who owns Darwin Road over I-70?

It is owned by the State Highway Agency.